Flange displacement amount estimation method for rotating machine, storage medium for executing the method, and device for executing the method

Abstract

In the flange displacement amount estimation method of the present application, effective three-dimensional coordinate data at a lower first position in a surface connected to a lower flange surface of a first supported portion, a lower target midpoint position in the lower flange surface, an upper first position in a surface connected to an upper flange surface coinciding with the lower first position in a horizontal direction, and an upper target midpoint position in the upper flange surface are grasped. The effective three-dimensional coordinate data at each position is changed so that the effective three-dimensional coordinate data at the lower first position coincides with the effective three-dimensional coordinate data at the upper first position. An intermediate position in a vertical direction of the lower target midpoint position and the upper target midpoint position after the coordinate change is set as a target contact position. A difference in the vertical direction of the upper target position and the target contact position is set as a displacement amount of the upper target position, and a difference in the vertical direction of the lower target position and the target contact position is set as a displacement amount of the lower target position.

Description

Technical Field

[0001] This disclosure relates to a method for estimating flange displacement on the flange surfaces of an upper and lower housing covering the outer periphery of a rotor in rotating machinery, a program for performing the method, and an apparatus for performing the method.

[0002] This application claims priority based on Japanese Patent Application No. 2022-027442, filed in Japan on February 25, 2022, the contents of which are incorporated herein by reference. Background Technology

[0003] Rotating machinery such as steam turbines includes: a rotor capable of rotating about a horizontally extending axis; a casing covering the outer periphery of the rotor; and stationary parts such as diaphragms, disposed within and assembled into the casing. The casing generally comprises: an upper half-shell; a lower half-shell; and multiple bolts fastening the upper and lower half-shells. The upper half-shell has an upper flange with a downward-facing upper flange surface. The lower half-shell has a lower flange with an upward-facing lower flange surface opposite to the upper flange in the vertical direction.

[0004] During the inspection of rotating machinery, the upper shell is separated from the lower shell in an open state. Multiple components constituting the rotating machinery are inspected and repaired as needed. The shell of rotating machinery such as steam turbines sometimes undergoes inelastic deformation, such as creep, due to the heat generated during operation. Therefore, the lower and upper shells, once in the open state after operation, are tightly deformed from the factory. At the end of the inspection, the multiple components are assembled. This assembly process includes using multiple bolts to fasten the upper shell to the lower shell, creating a secure connection. During the process of moving the lower and upper shells from the open state to the secure state, the lower and upper shells undergo further deformation.

[0005] The radial spacing between the stationary parts assembled in the housing and the rotor needs to be controlled within a predetermined allowable range. However, when the housing changes from an open state to a locked state and the shapes of the lower and upper housings change, the radial spacing between the stationary parts assembled in the housing and the rotor may sometimes change, and this spacing may deviate from the allowable range.

[0006] Therefore, in the technology described in Patent Document 1 below, the deformation of the lower and upper shells when changing from an open state to a secured state is estimated in the following process. First, a finite element model related to the three-dimensional shape of the lower and upper shells is obtained. Next, three-dimensional shape data of the lower and upper shells in the open state are obtained through actual measurement. Then, the finite element model is corrected using the measured three-dimensional shape data so that the finite element model conforms to the measured three-dimensional shape data. Next, the corrected finite element model representing the open state is used to simulate the secured state to generate a finite element model representing the secured state. Then, based on the difference between the finite element model representing the open state and the finite element model representing the secured state, the deformation of a specified portion in the lower and upper shells is estimated. It should be noted that the specified portion in the lower and upper shells refers to the lower flange surface of the lower shell and the upper flange surface of the upper shell.

[0007] That is, in the technology described in Patent Document 1, a finite element model representing the open state is used to simulate the fastened state, and the displacement of the lower flange surface of the lower shell and the upper flange surface of the upper shell is estimated based on the finite element model representing the fastened state obtained in the simulation.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 2019-070334 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] In the technology described in Patent Document 1, a finite element model representing the open state is used to simulate the fastened state. Therefore, the computational load for performing this simulation is high. Consequently, the technology described in Patent Document 1 not only extends the preparation period but also increases the cost of estimating the displacement of the flange surface.

[0013] Therefore, the purpose of this disclosure is to provide a technique that can shorten the preparation period for estimating the flange surfaces by reducing the computational load when estimating the displacement of the flange surfaces of the upper and lower shells, and reduce the estimation cost.

[0014] Technical solution

[0015] As one approach to achieving the stated objective, a method for estimating the flange displacement of rotating machinery is applied to the following rotating machinery.

[0016] The rotating machinery comprises: a rotor capable of rotating about a horizontally extending axis; a housing covering the outer periphery of the rotor; stationary parts disposed within and assembled into the housing; and a bracket supporting the housing from below. The housing has: an upper half-housing; a lower half-housing; and a plurality of bolts fastening the upper and lower half-housings. The upper half-housing has an upper flange with a downward-facing upper flange surface. The lower half-housing has: a lower flange with an upward-facing lower flange surface facing the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. Bolt holes are formed in the upper and lower flanges, extending vertically, through which the plurality of bolts can be inserted.

[0017] In the above method for estimating the flange displacement of rotating machinery, the following steps are performed:

[0018] The measured coordinate acceptance process accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface and multiple locations on the lower flange surface in an open state. The open state refers to the state where the rotating machinery has been disassembled but the upper and lower halves of the shell are not secured with the multiple bolts. The effective coordinate mastering process uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to master the effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to master the effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate modification process modifies the effective three-dimensional coordinate data mastered in the effective coordinate mastering process, so that the effective coordinates... The effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate acquisition process are consistent with the effective three-dimensional coordinate data of the upper first position, and the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate acquisition process are consistent with the effective three-dimensional coordinate data of the upper second position. In the contact position estimation process, the effective three-dimensional coordinate data of the lower object midpoint position and the upper object midpoint position after being changed by the coordinate change process are used to calculate the effective three-dimensional coordinate data of the object contact position, which is the midpoint between the lower and upper object midpoint positions in the vertical direction. In the displacement calculation process, the vertical displacement of the upper and lower object positions when changing from the open state to the tightened state is calculated, where the tightened state refers to the state in which the upper and lower half-shells are tightened by the multiple bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the horizontal direction in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement from the open state to the fastened state is desired. The lower object midpoint position is the midpoint on the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the lower object position. The upper first position is the position on the surface connected to the upper flange surface that coincides with the first representative position of the first supported portion in the horizontal direction. The upper second position is the position on the surface connected to the upper flange surface that coincides with the second representative position of the second supported portion in the horizontal direction. The upper object position is the position on the upper flange surface that coincides with the lower object position in the horizontal direction.The midpoint of the upper object is the midpoint in the transverse direction of the upper flange surface, and its position in the axial direction coincides with the position of the lower object. In the displacement calculation process, the difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the lower object position. Similarly, the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the upper object position.

[0019] In this scheme, the midpoints of the upper and lower objects in the vertical direction at the midpoints of the upper and lower objects in the upper flange surface are defined as the object contact positions. Furthermore, in this scheme, the difference between the vertical displacement of the upper object position (where the vertical displacement is desired) and the vertical displacement of the object contact position in the upper flange surface is defined as the displacement of the upper object position. Similarly, the difference between the vertical displacement of the lower object position (where the vertical displacement is desired) and the vertical displacement of the object contact position in the lower flange surface is defined as the displacement of the lower object position. Therefore, in this scheme, even without using finite element models of the lower and upper shells to simulate their deformation, the vertical displacements of the upper and lower object positions can be calculated. Thus, this scheme reduces the computational load when calculating the displacements.

[0020] Furthermore, the midpoints of the vertical directions of the upper object position in the upper flange surface and the lower object position in the lower flange surface can also be set as the object contact position. The deformation of the flange surface includes not only vertical deformation accompanying changes in the axial direction, but also vertical deformation accompanying changes in the lateral direction. Assuming the lower and upper object positions are the positions of the inner edges in the flange surface, the object contact position is determined using the upper and lower object positions as described above. In this case, the vertical deformation of the flange surface accompanying changes in the lateral direction is extremely reflected in the determined object contact position, increasing the vertical error of the object contact position. As a result, the error in the displacement of the upper and lower object positions sometimes increases. On the other hand, in this solution, the midpoints of the vertical directions of the upper object midpoint (which is the midpoint in the lateral direction in the upper flange surface) and the lower object midpoint (which is the midpoint in the lateral direction in the lower flange surface) are set as the object contact position. Therefore, in this scheme, the vertical deformation of the flange surface, which is accompanied by the lateral change, will not be extremely reflected in the calculated object contact position, thus reducing the vertical error of the object contact position. As a result, the displacement error of the upper and lower object positions can be reduced.

[0021] As one approach to achieving the stated objective, a flange displacement estimation procedure for rotating machinery is applied to the following rotating machinery.

[0022] The rotating machinery comprises: a rotor capable of rotating about a horizontally extending axis; a housing covering the outer periphery of the rotor; stationary parts disposed within and assembled into the housing; and a bracket supporting the housing from below. The housing has: an upper half-housing; a lower half-housing; and a plurality of bolts fastening the upper and lower half-housings. The upper half-housing has an upper flange with a downward-facing upper flange surface. The lower half-housing has: a lower flange with an upward-facing lower flange surface facing the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. Bolt holes are formed in the upper and lower flanges, extending vertically, through which the plurality of bolts can be inserted.

[0023] The above procedure for estimating the flange displacement of rotating machinery causes the computer to execute the following steps:

[0024] The measured coordinate acceptance process accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface and multiple locations on the lower flange surface in an open state. The open state refers to the state where the rotating machinery has been disassembled but the upper and lower halves of the shell are not secured with the multiple bolts. The effective coordinate mastering process uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to master the effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to master the effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate modification process modifies the effective three-dimensional coordinate data mastered in the effective coordinate mastering process, so that the effective coordinates... The effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate acquisition process are consistent with the effective three-dimensional coordinate data of the upper first position, and the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate acquisition process are consistent with the effective three-dimensional coordinate data of the upper second position. In the contact position estimation process, the effective three-dimensional coordinate data of the lower object midpoint position and the upper object midpoint position after being changed by the coordinate change process are used to calculate the effective three-dimensional coordinate data of the object contact position, which is the midpoint between the lower and upper object midpoint positions in the vertical direction. In the displacement calculation process, the vertical displacement of the upper and lower object positions when changing from the open state to the tightened state is calculated, where the tightened state refers to the state in which the upper and lower half-shells are tightened by the multiple bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the horizontal direction in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement from the open state to the fastened state is desired. The lower object midpoint position is the midpoint on the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the lower object position. The upper first position is the position on the surface connected to the upper flange surface that coincides with the first representative position of the first supported portion in the horizontal direction. The upper second position is the position on the surface connected to the upper flange surface that coincides with the second representative position of the second supported portion in the horizontal direction. The upper object position is the position on the upper flange surface that coincides with the lower object position in the horizontal direction.The midpoint of the upper object is the midpoint in the transverse direction of the upper flange surface, and its position in the axial direction coincides with the position of the lower object. In the displacement calculation process, the difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the lower object position. Similarly, the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the upper object position.

[0025] In this scheme, the computational load for determining the displacement can be reduced in the same way as the flange displacement estimation method of the aforementioned scheme by having the computer execute the program.

[0026] As a solution for achieving the aforementioned purpose, a flange displacement device for rotating machinery is applied to the following rotating machinery.

[0027] The rotating machinery comprises: a rotor capable of rotating about a horizontally extending axis; a housing covering the outer periphery of the rotor; stationary parts disposed within and assembled into the housing; and a bracket supporting the housing from below. The housing has: an upper half-housing; a lower half-housing; and a plurality of bolts fastening the upper and lower half-housings. The upper half-housing has an upper flange with a downward-facing upper flange surface. The lower half-housing has: a lower flange with an upward-facing lower flange surface facing the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. Bolt holes are formed in the upper and lower flanges, extending vertically, through which the plurality of bolts can be inserted.

[0028] The flange displacement estimation device for the above rotating machinery includes:

[0029] The measured coordinate receiving unit receives measured three-dimensional coordinate data at multiple locations on the upper flange surface and multiple locations on the lower flange surface in an open state. The open state refers to the state where the rotating machinery has been disassembled but the upper and lower halves of the shell are not secured with the multiple bolts. The effective coordinate holding unit uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to hold effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to hold effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate changing unit changes the effective three-dimensional coordinate data held by the effective coordinate holding unit to make the effective coordinates... The effective three-dimensional coordinate data of the lower first position held by the control unit are consistent with the effective three-dimensional coordinate data of the upper first position, and the effective three-dimensional coordinate data of the lower second position held by the effective coordinate control unit are consistent with the effective three-dimensional coordinate data of the upper second position; the contact position estimation unit uses the effective three-dimensional coordinate data of the lower object midpoint position and the upper object midpoint position changed by the coordinate change unit to calculate the effective three-dimensional coordinate data of the object contact position, which is the midpoint in the vertical direction between the lower object midpoint position and the upper object midpoint position; and the displacement calculation unit calculates the vertical displacement of the upper object position and the lower object position when changing from the open state to the tightened state, where the tightened state refers to the state in which the upper half shell and the lower half shell are tightened by the plurality of bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the horizontal direction in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement from the open state to the fastened state is desired. The lower object midpoint position is the midpoint on the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the lower object position. The upper first position is the position on the surface connected to the upper flange surface that coincides with the first representative position of the first supported portion in the horizontal direction. The upper second position is the position on the surface connected to the upper flange surface that coincides with the second representative position of the second supported portion in the horizontal direction. The upper object position is the position on the upper flange surface that coincides with the lower object position in the horizontal direction.The midpoint of the upper object is the midpoint in the transverse direction of the upper flange surface, and it is the position where the position in the axial direction coincides with the position of the lower object. The displacement calculation unit sets the difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position changed by the coordinate change unit and the vertical position shown in the effective three-dimensional coordinate data of the object contact position as the vertical displacement of the lower object position, and sets the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position changed by the coordinate change unit and the vertical position shown in the effective three-dimensional coordinate data of the object contact position as the vertical displacement of the upper object position.

[0030] In this scheme, the computational load for calculating the displacement can be reduced in the same way as the flange displacement estimation method of the aforementioned scheme.

[0031] Invention Effects

[0032] In one aspect of this disclosure, the computational load is reduced when estimating the displacement of the flange surfaces of the upper and lower shells, thereby shortening the preparation period for estimating the flange surfaces and reducing the estimation cost. Attached Figure Description

[0033] Figure 1 This is a schematic diagram illustrating the general configuration of a steam turbine as a rotating machine according to one embodiment of the present disclosure.

[0034] Figure 2 This is a schematic diagram showing the general shape of a steam turbine as a rotating machine according to one embodiment of the present disclosure.

[0035] Figure 3 This is a top view of the main parts of the upper half shell and the main parts of the lower half shell according to one embodiment of this disclosure.

[0036] Figure 4 This is a cross-sectional view of the housing in an open state according to one embodiment of this disclosure.

[0037] Figure 5 This is a cross-sectional view of the housing in a fastened state according to one embodiment of this disclosure.

[0038] Figure 6 This is a functional block diagram of a flange displacement estimation device according to one embodiment of the present disclosure.

[0039] Figure 7 This is a flowchart illustrating a method for estimating flange displacement according to one embodiment of the present disclosure.

[0040] Figure 8This is an explanatory diagram showing the position of effective three-dimensional coordinate data in the flange surface according to one embodiment of the present disclosure.

[0041] Figure 9 This is an explanatory diagram showing the processing content in the contact position estimation process and the displacement calculation process of one embodiment of the present disclosure.

[0042] Figure 10 This is an explanatory diagram showing the processing content in the coordinate change process S3 of one embodiment of this disclosure.

[0043] Figure 11 This is an explanatory diagram showing the location of the measured three-dimensional shape data required when performing the first mastering method according to one embodiment of the present disclosure.

[0044] Figure 12 This is an explanatory diagram illustrating a method for obtaining effective three-dimensional coordinate data when performing the first mastering method according to an embodiment of the present disclosure.

[0045] Figure 13 This is an explanatory diagram illustrating another method for obtaining effective three-dimensional coordinate data when performing the first mastering method, according to one embodiment of the present disclosure.

[0046] Figure 14 This is an explanatory diagram showing the position of the measured three-dimensional coordinate data required when performing the second mastering method according to one embodiment of the present disclosure.

[0047] Figure 15 This is an explanatory diagram illustrating a method for obtaining effective three-dimensional coordinate data when performing the second mastering method according to an embodiment of the present disclosure.

[0048] Figure 16 This is an explanatory diagram showing the position of the measured three-dimensional coordinate data required when performing the third mastering method according to one embodiment of the present disclosure.

[0049] Figure 17 This is a schematic diagram showing the relative positional relationship between points on a flange surface shown by reference three-dimensional shape data and points on a plurality of actual flange surfaces when the third mastery method is executed, according to an embodiment of the present disclosure.

[0050] Figure 18 This is an explanatory diagram used to illustrate multiple polygon data of one embodiment of the present disclosure.

[0051] Figure 19 This is an explanatory diagram illustrating the extraction of specific polygon data from multiple polygon data in one embodiment of this disclosure.

[0052] Figure 20 This is a schematic diagram showing the relative positional relationship between the flange surface shown by the reference three-dimensional shape data and the points shown by the measured three-dimensional coordinate data at multiple locations after extracting polygon data in a plurality of positions of the actual flange surface when the third mastering method is performed according to an embodiment of the present disclosure.

[0053] Figure 21 This is an explanatory diagram illustrating a method for determining a reference position when performing a third mastery method according to an embodiment of the present disclosure.

[0054] Figure 22 This is an explanatory diagram showing the position of the measured three-dimensional coordinate data required when performing the fourth mastering method according to one embodiment of the present disclosure.

[0055] Figure 23 This is a schematic diagram showing the relative positional relationship between points on a flange surface shown by reference three-dimensional shape data and points on a plurality of actual flange surfaces when the fourth mastering method is performed, according to an embodiment of the present disclosure.

[0056] Figure 24 This is a schematic diagram showing the relative positional relationship of points at multiple locations after extracting polygon data from the flange surface at multiple locations of the actual flange surface, based on the reference three-dimensional shape data of an embodiment of the present disclosure when the fourth mastering method is performed.

[0057] Figure 25 This is an explanatory diagram illustrating a method for determining a reference position when performing the fourth mastering method according to an embodiment of the present disclosure. Detailed Implementation

[0058] The following describes the implementation of the method for estimating the flange displacement of rotating machinery, the program for performing the method, and the apparatus for performing the method.

[0059] <Implementation Methods of Rotating Machinery>

[0060] Reference Figures 1-5 The rotating machinery of this embodiment will be described.

[0061] like Figures 1-3As shown, the rotating machinery in this embodiment is a steam turbine 10. The steam turbine 10 includes: a rotor 15 that rotates about an axis Ar extending in the horizontal direction; a housing 30 that covers the outer periphery of the rotor 15; a first bearing assembly 12a and a second bearing assembly 12b that support the rotor 15 for rotatability; a plurality of diaphragms 20; a first shaft sealing assembly 13a and a second shaft sealing assembly 13b that seal the gap between the housing 30 and the rotor 15; and a support 11 that supports the housing 30 from below.

[0062] Here, the direction in which axis Ar extends is designated as the axial direction Dy, the horizontal direction perpendicular to the axial direction Dy is designated as the transverse direction Dx, the circumferential direction relative to axis Ar is designated only as the circumferential direction Dc, and the radial direction relative to axis Ar is designated only as the radial direction Dr. Furthermore, within this radial direction Dr, the side closer to axis Ar is designated as the radially inner side Dri, and the side farther from axis Ar is designated as the radially outer side Dro. Additionally, in the figure's reference numerals, U signifies the upper half, and L signifies the lower half.

[0063] The rotor 15 includes: a rotor shaft 16 extending along an axial direction Dy; and a plurality of blade rows 17 mounted on the rotor shaft 16 in an arrangement along the axial direction Dy. Each of the plurality of blade rows 17 has a plurality of blades arranged circumferentially Dc relative to the axis Ar. Both ends of the rotor shaft 16 protrude from the housing 30 in the axial direction Dy. One end of the rotor shaft 16 in the axial direction Dy is rotatably supported by a first bearing assembly 12a mounted on a bracket 11. The other end of the rotor shaft 16 in the axial direction Dy is rotatably supported by a second bearing assembly 12b mounted on the bracket 11.

[0064] The first shaft sealing device 13a is located at one end of the housing 30 along the axial direction Dy. The second shaft sealing device 13b is located at the other end of the housing 30 along the axial direction Dy. Both the first shaft sealing device 13a and the second shaft sealing device 13b are devices for sealing the gap between the rotor shaft 16 and the housing 30.

[0065] Multiple diaphragms 20 are arranged along the axial direction Dy within the housing 30. Each diaphragm 20 has: a lower half diaphragm 20L, forming a portion lower than the axis Ar; and an upper half diaphragm 20U, forming a portion higher than the axis Ar. Both the lower half diaphragm 20L and the upper half diaphragm 20U have: multiple stator vanes 22 arranged circumferentially Dc; an inner diaphragm ring 23 connecting the radially inner portions Dri of the multiple stator vanes 22; an outer diaphragm ring 24 connecting the radially outer portions Dro of the multiple stator vanes 22; and a sealing device 25 fitted to the radially inner portion Dri of the inner diaphragm ring 23. This sealing device 25 is a sealing device that seals the gap between the inner diaphragm ring 23 and the rotor shaft 16.

[0066] The first shaft sealing device 13a and the second shaft sealing device 13b, as well as the plurality of diaphragms 20 described above, all have stationary parts that extend circumferentially relative to the axis Ar and are fitted into the housing 30.

[0067] like Figure 2 As shown, the housing 30 includes: a lower housing 30L, forming a portion lower than the axis Ar; an upper housing 30U, forming a portion higher than the axis Ar; and a plurality of bolts 39 for fastening the upper housing 30U to the lower housing 30L. The lower housing 30L includes: a lower housing body 31L extending circumferentially Dc; a lower flange 32L protruding radially outward from both ends of the lower housing body 31L in the circumferential direction Dc; and a first supported portion 35a and a second supported portion 35b connected to the lower flange 32L and supported from below by a bracket 11. Furthermore, the upper housing 30U includes: an upper housing body 31U extending circumferentially Dc; and an upper flange 32U protruding radially outward from both ends of the upper housing body 31U in the circumferential direction Dc. It should be noted that the upper flange 32U does not have a portion opposing the first supported portion 35a and the second supported portion 35b in the lower flange 32L. However, a portion may also be provided in the upper flange 32U opposite to the first supported portion 35a and the second supported portion 35b in the lower flange 32L.

[0068] like Figures 2-5 As shown, the upper flange 32L has an upward-facing surface that forms a lower flange surface 33L. Furthermore, the lower flange 32U has a downward-facing surface that forms an upper flange surface 33U. The lower flange surface 33L and the upper flange surface 33U are opposite each other in the vertical direction Dz.

[0069] The first supported portion 35a protrudes from one side to the other along the axial direction Dy of the lower flange 32L. The second supported portion 35b protrudes from the other side along the axial direction Dy of the lower flange 32L. Thus, the second supported portion 35b is located away from the first supported portion 35a along the axial direction Dy. In this embodiment, the upper surface 35ap of the first supported portion 35a and the upper surface 35bp of the second supported portion 35b are surfaces connected to the lower flange surface 33L. That is, the upper surfaces 35ap of the first supported portion 35a and 35bp of the second supported portion 35b are continuous with the lower flange surface 33L and have no steps relative to the lower flange surface 33L.

[0070] Bolt holes 34 are formed in the lower flange 32L and the upper flange 32U, which are through in the vertical direction Dz and can be inserted by multiple bolts 39 respectively. The lower half shell 30L and the upper half shell 30U are fastened by bolts 39 inserted into the bolt holes 34 of the lower flange 32L and the bolt holes 34 of the upper flange 32U.

[0071] Multiple stationary part storage sections 36 are formed on the inner circumferential surfaces of the lower half-shell body 31L and the upper half-shell body 30U, respectively storing the aforementioned multiple stationary parts. Each stationary part storage section 36 of the lower half-shell body 31L is a groove that is recessed radially outward (Dro) from the inner circumferential surface of the lower half-shell body 31L and extends circumferentially (Dc). Similarly, each stationary part storage section 36 of the upper half-shell body 31U is a groove that is recessed radially outward (Dro) from the inner circumferential surface of the upper half-shell body 31U and extends circumferentially (Dc). It should be noted that the diaphragm 20, which is a type of stationary part, is supported by a portion near the flange surface in the stationary part storage section 36 extending circumferentially (Dc).

[0072] As the steam turbine 10 operates, the inner circumferential surface of the casing 30 is exposed to high-temperature steam. Therefore, due to the operation of the steam turbine 10, the casing 30 sometimes undergoes inelastic deformation such as creep. As a result of this deformation, in the open state where the upper casing 30U is not securely fastened to the lower casing 30L, such as… Figure 4 As shown, the vertical positions of the lower flange surface 33L and the upper flange surface 33U in the vertical direction Dz change according to the position of the axial direction Dy.

[0073] When the upper half-shell 30U, which has undergone deformation as shown above, is fastened to the lower half-shell 30L, which has undergone deformation as shown above, so that the shell 30 is in a fastened state, as Figure 5 As shown, the vertical positions of the lower flange surface 33L and the upper flange surface 33U in the vertical direction Dz are further changed according to the position of the axial direction Dy.

[0074] The radial distance Dr between the stationary parts assembled in the housing 30 and the rotor 15 needs to be controlled within a predetermined allowable range. Specifically, for example, the distance between the first shaft sealing device 13a and the second shaft sealing device 13b, which are stationary parts, and the rotor shaft 16, and the distance between the sealing device 25 of the diaphragm 20 and the rotor shaft 16, need to be controlled within a predetermined allowable range. However, even if there are shape data for the lower half housing 30L and the upper half housing 30U in the open state, when the housing 30 changes from the open state to the fastened state and the shapes of the lower half housing 30L and the upper half housing 30U change, the radial distance Dr between the stationary parts and the rotor 15 may change, and this distance may also deviate from the allowable range.

[0075] The inventors discovered that the change in the radial distance Dr between the stationary part and the rotor 15, accompanying the deformation of the lower half-shell 30L and the upper half-shell 30U caused by the change from an open state to a fastened state, dominates the deformation of the lower flange surface 33L and the upper flange surface 33U. Therefore, the inventors proposed to estimate the displacement of the lower flange surface 33L and the upper flange surface 33U caused by the change from an open state to a fastened state, and to determine the radial distance Dr between the stationary part and the rotor 15 in the fastened state based on these displacements.

[0076] The following describes the flange displacement estimation device and method for estimating the displacement of the lower flange surface 33L and the upper flange surface 33U.

[0077] <Implementation Method of Flange Displacement Estimation Device>

[0078] Reference Figure 6 The flange displacement estimation device of this embodiment will be described.

[0079] The flange displacement estimation device 50 is a computer. This flange displacement estimation device 50 includes: a CPU (Central Processing Unit) 60 for performing various calculations; a memory 57, which is the working area of ​​the CPU 60; an auxiliary storage device 58 such as a hard disk drive; a manual input device (input device) 51 such as a keyboard and mouse; a display device (output device) 52; an input / output interface 53 for the manual input device 51 and the display device 52; a device interface (input device) 54 for transmitting and receiving data with a three-dimensional shape measuring device 69 such as a three-dimensional laser measuring instrument; a communication interface (input / output device) 55 for communicating with external devices via a network N; and a storage / reproduction device (input / output device) 56 for storing and reproducing data on a disk-type storage medium D, which is a non-temporary storage medium.

[0080] The auxiliary storage device 58 stores in advance a flange displacement estimation program 58p and reference three-dimensional shape data 58d for each of the plurality of parts constituting the steam turbine 10. This reference three-dimensional shape data 58d can be three-dimensional design data, for example, three-dimensional data obtained through actual measurements before the steam turbine 10 is shipped from the factory. That is, the reference three-dimensional shape data 58d only needs to be three-dimensional data obtained before operation prior to periodic inspections. Three-dimensional coordinate data at each position of each of the plurality of parts can be obtained from the reference three-dimensional shape data 58d. The flange displacement estimation program 58p is imported into the auxiliary storage device 58, for example, via a storage / reproduction device 56 from a disk-type storage medium D, which is a non-temporary storage medium. It should be noted that the flange displacement estimation program 58p can also be imported into the auxiliary storage device 58 from an external device via a communication interface 55.

[0081] The CPU 60 functionally comprises: a measured coordinate receiving unit 61, an effective coordinate holding unit 62, a coordinate changing unit 63, a contact position estimation unit 64, and a displacement calculation unit 65. Each of these functional units 61 to 65 operates by the CPU 60 executing the flange displacement estimation program 58p stored in the auxiliary storage device 58. The operation of each of these functional units 61 to 65 will be described later.

[0082] <Implementation Method of Flange Displacement Estimation>

[0083] according to Figure 7 The flowchart shown illustrates the flange displacement estimation method of this embodiment. It should be noted that this flange displacement estimation method is performed by the flange displacement estimation device described above.

[0084] The steam turbine 10 is disassembled and reassembled during each inspection or other routine process. The disassembly of the steam turbine 10 is completed at a specific point in time, such as... Figure 4 As shown, the upper housing 30U is removed from the lower housing 30L. As a result, housing 30 is in an open state where the upper housing 30U and lower housing 30L are not secured by bolts 39. Then, the rotor 15, multiple diaphragms 20, the first shaft sealing device 13a, and the second shaft sealing device 13b are removed from housing 30 and disposed outside housing 30. It should be noted that the lower housing 30L can also be removed from the support 11 at the point when the disassembly of the steam turbine 10 is completed, but here it is assumed that the lower housing 30L is supported by the support 11.

[0085] When the steam turbine 10 is disassembled and the casing 30 is in an open state as shown above, the operator uses a three-dimensional shape measuring device 69, such as a three-dimensional laser measuring instrument, to measure the three-dimensional coordinate values ​​at multiple locations on the upper flange surface 33U and at multiple locations on the lower flange surface 33L. Then, the operator transmits the measured three-dimensional coordinate values ​​at multiple locations on the upper flange surface 33U and at multiple locations on the lower flange surface 33L as measured three-dimensional coordinate data from the three-dimensional shape measuring device 69 to the flange displacement estimation device 50. The measured coordinate receiving unit 61 of the flange displacement estimation device 50 receives the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and at multiple locations on the lower flange surface 33L (measured coordinate receiving process S1).

[0086] The three-dimensional coordinate data in this embodiment includes: coordinate values ​​representing the position of the axial direction Dy extending horizontally; coordinate values ​​representing the position of the vertical direction Dz perpendicular to the axial direction Dy; and coordinate values ​​representing the position of the horizontal direction Dx perpendicular to the axial direction Dy and extending horizontally.

[0087] When the measured coordinate receiving unit 61 receives multiple measured three-dimensional coordinate data, the effective coordinate control unit 62 of the flange displacement estimation device 50 uses multiple measured three-dimensional coordinate data, such as Figure 8 As shown, valid three-dimensional coordinate data (valid coordinate acquisition process S2) is obtained for multiple lower object positions 71L, lower first position 72La, lower second position 72Lb, multiple lower object midpoint positions 75L, multiple upper object positions 71U, upper first position 72Ua, upper second position 72Ub, and multiple upper object midpoint positions 75U. Here, valid three-dimensional coordinate data refers to the three-dimensional coordinate data of points on the surfaces of the hypothetical upper flange surfaces 33L and 33U, calculated based on multiple measured three-dimensional coordinate data. This data is required to estimate the displacement of the lower flange surface 33L and the upper flange surface 33U caused by changing from an open state to a tightened state. The method for obtaining this valid three-dimensional coordinate data will be explained in detail below.

[0088] Here, the lower first position 72La is the position in the horizontal direction that coincides with the first representative position 74a of the first supported portion 35a in the surface connected to the lower flange surface 33L. The first representative position 74a is the position where the maximum load is applied in the first supported portion 35a. The lower second position 72Lb is the position in the horizontal direction that coincides with the second representative position 74b of the second supported portion 35b in the surface connected to the lower flange surface 33L. The second representative position 74b is the position where the maximum load is applied in the second supported portion 35b. It should be noted that the "surface connected to the lower flange surface 33L" can be an actual surface or an imaginary surface. In this embodiment, the upper surface 35ap of the first supported portion 35a and the upper surface 35bp of the second supported portion 35b are surfaces connected to the lower flange surface 33L. The multiple lower target positions 71L are positions in the lower flange surface 33L where the vertical displacement Dz of the housing 30 is desired when it changes from an open state to a fastened state. Here, the position in the lower flange surface 33L where the vertical displacement Dz is desired refers to the position where the stationary part storage section 36 is formed in the axial direction Dy of the lower flange surface 33L, which is the position of the inner edge of the lower flange surface 33L. For example... Figure 8 and Figure 9 As shown, the lower object midpoint position 75L is the midpoint of the lower flange surface 33L in the transverse direction Dx, and its position in the axial direction Dy coincides with the lower object position 71L. The upper first position 72Ua is the position in the horizontal direction that coincides with the first representative position 74a of the first supported part 35a in the surface connected to the upper flange surface 33U. The upper second position 72Ub is the position in the horizontal direction that coincides with the second representative position 74b of the second supported part 35b in the horizontal direction in the surface connected to the upper flange surface 33U. It should be noted that the "surface connected to the upper flange surface 33U" can be an actual surface or an imaginary surface. The multiple upper object positions 71U are the positions in the upper flange surface 33U where the vertical displacement Dz of the housing 30 is desired when it changes from an open state to a fastened state. Here, the position in the upper flange surface 33U where the vertical displacement Dz is desired refers to the position where the stationary part storage section 36 is formed in the axial direction Dy of the upper flange surface 33U, which is the position of the inner edge of the upper flange surface 33U. For example... Figure 8 and Figure 9 As shown, the midpoint 75U of the upper object is located at the midpoint of the transverse direction Dx in the upper flange surface 33U, and its position in the axial direction Dy coincides with the position of the upper object. It should be noted that the method for obtaining the effective three-dimensional coordinate data at each position will be explained in detail later.

[0089] Multiple upper object positions 71U are all horizontally aligned with any one of the multiple lower object positions 71L. Therefore, the midpoint position 75U of the upper object is the midpoint of the transverse direction Dx in the upper flange surface 33U, and also the position in the axial direction Dy that coincides with the lower object position 71L. Here, "alignment in the XX direction" includes not only the case where the positions in the XX direction are completely identical, but also the case where the positions in the XX direction are substantially identical. For example, horizontal alignment not only means that the coordinate values ​​of the position in the axial direction Dy are the same, but also that the coordinate values ​​of the position in the transverse direction Dx are substantially the same, and that the coordinate values ​​of the position in the axial direction Dy are also substantially the same.

[0090] The change in the radial distance Dr between the stationary part and the rotor 15, caused by the deformation of the lower half-shell 30L and the upper half-shell 30U due to the change from an open state to a locked state, dominates the deformation at the following locations: the location where the stationary part storage portion 36 is formed in the axial direction Dy of the lower flange surface 33L and the location of the inner edge of the lower flange surface 33L; and the location where the stationary part storage portion 36 is formed in the axial direction Dy of the upper flange surface 33U and the location of the inner edge of the upper flange surface 33U. Therefore, the lower object position 71L where a displacement amount in the vertical direction Dz is desired is set to the above-described position, and the upper object position 71U where a displacement amount in the vertical direction Dz is desired is set to the above-described position.

[0091] It should be noted that the lower object position 71L may not be the inner edge of the lower flange surface 33L. For example, it can be any position within the range along the flange width direction Dw, from the inner edge of the lower flange surface 33L to one-third of the flange width. Similarly, the upper object position 71U may not be the inner edge of the upper flange surface 33U. For example, it can be any position within the range along the flange width direction Dw, from the inner edge of the upper flange surface 33U to one-third of the flange width. Here, the flange width direction Dw refers to the direction connecting the outer and inner edges of the flange surface, and is the direction with the shortest distance from the reference position to the outer or inner edge of the flange surface. It should be noted that the reference position refers to each of the upper object position 71U and the lower object position 71L.

[0092] Next, the coordinate changing unit 63 of the flange displacement estimation device 50 changes the effective three-dimensional coordinate data grasped by the effective coordinate grasping unit 62 (coordinate changing process S3). Specifically, as follows... Figure 10As shown, the coordinate change unit 63 changes the effective three-dimensional coordinate data held by the effective coordinate control unit 62 through coordinate transformations such as parallel movement and / or rotational movement, so that the effective three-dimensional coordinate data of the lower first position 72La is consistent with the effective three-dimensional coordinate data of the upper first position 72Ua, and the effective three-dimensional coordinate data of the lower second position 72Lb is consistent with the effective three-dimensional coordinate data of the upper second position 72Ub.

[0093] Next, the contact position estimation unit 64 of the flange displacement estimation device 50 uses the effective three-dimensional coordinate data of the lower object midpoint position 75L and the upper object midpoint position 75U after being changed by the coordinate change unit 63 to calculate the effective three-dimensional coordinate data of the object contact position 73. The object contact position 73 is the midpoint in the vertical direction between the object midpoint position 75L and the upper object midpoint position 75U (contact position estimation process S4).

[0094] Next, the displacement calculation unit 65 of the flange displacement estimation device 50 calculates the vertical displacement Dz of the upper object position 71U and the lower object position 71L when the housing 30 changes from the open state to the fastened state, and outputs these displacements according to external requests (displacement calculation step S5). Specifically, as follows Figure 9 As shown in the following formula, the displacement calculation unit 65 sets the difference between the vertical coordinate value ZL of the effective three-dimensional coordinate data of the lower object position 71L after coordinate change and the vertical coordinate value ZC of the effective three-dimensional coordinate data of the object contact position 73 relative to the lower object position 71L as the displacement ZdL of the vertical direction Dz of the lower object position 71L. Furthermore, the displacement calculation unit 65 sets the difference between the vertical coordinate value ZU of the effective three-dimensional coordinate data of the upper object position 71U after coordinate change and the vertical coordinate value ZC of the effective three-dimensional coordinate data of the object contact position 73 relative to the upper object position 71U as the displacement ZdU of the upper object position 71U in the vertical direction Dz.

[0095] ZdL=ZL-ZC

[0096] ZdU=ZU-ZC

[0097] The above concludes the estimation of the vertical displacement Dz at the lower object position 71L of the lower flange 32L and the lower object position 71L of the upper object position 71U, performed by the flange displacement estimation device 50.

[0098] Next, various methods for acquiring effective three-dimensional coordinate data in the effective coordinate acquisition unit 62 will be explained.

[0099] <First-hand method>

[0100] When the first mastering method is executed in the effective coordinate mastering process S2, such as Figure 11 As shown, in the measured coordinate processing step S1, measured three-dimensional coordinate data at multiple lower object positions 71L, multiple lower midpoint positions 75Lx, multiple upper object positions 71U, and multiple upper midpoint positions 75Ux are processed. Here, the lower midpoint position 75Lx is the midpoint on the transverse direction Dx of the lower flange surface 33L. The positions of the multiple lower midpoint positions 75Lx on the axial direction Dy are all different. Any one of the multiple lower midpoint positions 75Lx is the lower object midpoint position 75L. The midpoint position 75Ux is the midpoint on the transverse direction Dx of the upper flange surface 33U. The positions of the multiple upper midpoint positions 75Ux on the axial direction Dy are all different. Any one of the multiple upper midpoint positions 75Ux is the upper object midpoint position 75U.

[0101] In the effective coordinate mastering process S2 of the first mastering method, the effective coordinate mastering unit 62 sets the measured three-dimensional coordinate data of the multiple lower object positions 71L and multiple upper object positions 71U that were received in the measured coordinate receiving process S1 as the effective three-dimensional coordinate data of the multiple lower object positions 71L and multiple upper object positions 71U.

[0102] The effective coordinate acquisition unit 62 can obtain three-dimensional coordinate data of multiple lower object positions 71L and multiple upper object positions 71U at the time the data was generated from the reference three-dimensional shape data 58d stored in the auxiliary storage device 58. Therefore, the effective coordinate acquisition unit 62 identifies the measured three-dimensional coordinate data of a lower object position 71L from the measured three-dimensional coordinate data of multiple positions received by the measured coordinate receiving unit 61, for example, as shown below. The effective coordinate acquisition unit 62 extracts the measured three-dimensional coordinate data of a lower object position 71L shown in the reference three-dimensional shape data 58d that matches the horizontal coordinate value from the measured three-dimensional coordinate data of the multiple positions received by the measured coordinate receiving unit 61, and identifies this measured three-dimensional coordinate data as the measured three-dimensional coordinate data of a lower object position 71L.

[0103] In the effective coordinate mastering process S2, the effective coordinate mastering unit 62 calculates the effective three-dimensional coordinate data at the lower object's midpoint position 75L based on the changing trends of measured three-dimensional coordinate data at multiple lower midpoint positions 75Lx. The effective coordinate mastering unit 62 also calculates the effective three-dimensional coordinate data at the upper object's midpoint position 75U based on the changing trends of measured three-dimensional coordinate data at multiple upper midpoint positions 75Ux. When the effective coordinate mastering unit 62 calculates the effective three-dimensional coordinate data at the lower object's midpoint position 75L, as follows... Figure 12As shown, a high-dimensional function F, a quadratic function that approximates the surface shape in the region along the multiple lower midpoint positions 75Lx in the lower flange surface 33L, is obtained using valid three-dimensional coordinate data at multiple lower midpoint positions 75Lx. The valid coordinate acquisition unit 62 uses this high-dimensional function F to obtain the coordinate values ​​of the vertical direction Dz relative to the horizontal coordinate values ​​of the lower object midpoint position 75L shown in the reference three-dimensional shape data 58d. Then, the valid coordinate acquisition unit 62 replaces the vertical direction Dz coordinate values ​​in each direction related to the lower object midpoint position 75L shown in the reference three-dimensional shape data 58d with the previously obtained vertical direction Dz coordinate values, setting them as the valid three-dimensional coordinate data for the lower object midpoint position 75L.

[0104] The measured coordinate receiving unit 61 can accept all the measured three-dimensional coordinate data of the midpoints 75L of the multiple lower objects and all the measured three-dimensional coordinate data of the midpoints 75U of the multiple upper objects, and can set these measured three-dimensional coordinate data as valid three-dimensional coordinate data as is. However, in reality, for example, sometimes any one of the midpoints 75L of the multiple lower objects is the position of a bolt hole 34, etc. In this case, it is not possible to obtain the measured three-dimensional coordinate data of that midpoint 75L. Therefore, here, it is set to calculate the valid three-dimensional coordinate data of the midpoint 75L of the lower objects based on the changing trend of the measured three-dimensional coordinate data of the multiple midpoints 75Lx.

[0105] Furthermore, in the effective coordinate acquisition process S2, the effective coordinate acquisition unit 62 uses the aforementioned high-dimensional function F, which represents the changing trend of the measured three-dimensional coordinate data at multiple lower midpoint positions 75Lx, to extrapolate and obtain the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. The effective coordinate acquisition unit 62 also uses a high-dimensional function, representing the changing trend of the measured three-dimensional coordinate data at multiple upper midpoint positions 75Ux, to extrapolate and obtain the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0106] The above approximations of the surface shapes of the lower flange surface 33L and the upper flange surface 33U are achieved using a high-dimensional function F. However, it is also possible to... Figure 13As shown, the surface shape of a portion of the lower flange surface 33L and a portion of the upper flange surface 33U are approximated using a linear function. In this case, the effective coordinate acquisition unit 62 uses measured three-dimensional coordinate data at multiple lower midpoint positions 75Lx that are close to the lower object midpoint position 75L to be acquired in the effective three-dimensional coordinate data acquisition, and approximates the lower object midpoint position 75L to be acquired in the effective three-dimensional coordinate data acquisition using linear functions Fa and Fb. Then, the vertical coordinate value Dz of the effective three-dimensional coordinate data at the lower object midpoint position 75L is obtained using the linear functions Fa and Fb. Furthermore, the effective coordinate acquisition unit 62 uses measured three-dimensional coordinate data at multiple upper midpoint positions 75Ux that are close to the upper object midpoint position 75U to be acquired in the effective three-dimensional coordinate data acquisition, and approximates the upper object midpoint position 75U to be acquired in the effective three-dimensional coordinate data acquisition using a linear function. Then, the linear function is used to calculate the vertical coordinates Dz of the effective three-dimensional coordinate data at the midpoint position 75U of the upper object. Furthermore, the effective coordinate acquisition unit 62 uses the aforementioned linear functions Fa and Fb to extrapolate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, and uses linear functions to extrapolate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0107] The above provides valid 3D coordinate data for multiple lower object positions 71L, multiple lower object midpoint positions 75L, lower first position 72La, lower second position 72Lb, multiple upper object positions 71U, multiple upper object midpoint positions 75U, upper first position 72Ua, and upper second position 72Ub.

[0108] As mentioned above, the first mastering method can reduce the amount of three-dimensional coordinate data to be processed. Therefore, it can not only reduce the time required for the operator to measure the three-dimensional coordinate values, but also reduce the computational load on the computer.

[0109] The above estimates the vertical coordinate values ​​of the lower first position 72La and the lower second position 72Lb. However, in the measured coordinate receiving process S1, when receiving the measured three-dimensional coordinate data of the lower first position 72La at the upper surface 35ap of the first supported part 35a connected to the lower flange surface 33L, and the measured three-dimensional coordinate data of the lower second position 72Lb at the upper surface 35bp of the second supported part 35b connected to the lower flange surface 33L, these measured three-dimensional data can be set as the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb, respectively, while keeping them as they are.

[0110] As described above, the upper shell 30U sometimes also has a first supported portion and a second supported portion connected to the upper flange 32U. In this case, during the measured coordinate receiving process S1, when receiving the measured three-dimensional coordinate data of the upper first position 72Ua at the lower surface of the first supported portion connected to the upper flange surface 33U, and even the measured three-dimensional coordinate data of the upper second position 72Ub at the lower surface of the second supported portion connected to the upper flange surface 33U, these measured three-dimensional data can be set as valid three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub, respectively, while maintaining their original state.

[0111] <Second Mastery Method>

[0112] When the second mastering method is executed in the effective coordinate mastering process S2, the acceptance process in the actual coordinate receiving process S1 is performed. Figure 14 The measured three-dimensional coordinate data are shown at the following locations.

[0113] a. Measured three-dimensional coordinate data at multiple locations 78 on the lower virtual line 76L extending along the flange width direction Dw at each of the multiple lower object locations 71L.

[0114] b. Measured three-dimensional coordinate data at multiple locations 78 on the upper virtual line 76U extending along the flange width direction Dw at each of the multiple upper object locations 71U.

[0115] Here, the "YY position" on the "imaginary Z-line extending along the flange width direction through the YY position" is the "YY position" shown in the reference three-dimensional shape data 58d. Furthermore, the number of positions on the virtual line that receives the measured three-dimensional coordinate data in the measured coordinate receiving process S1 is, for example, 2 or more but less than 10.

[0116] In the effective coordinate mastering process S2 of the second mastering method, the effective coordinate mastering unit 62 uses multiple measured three-dimensional coordinate data received in the measured coordinate receiving process S1 to master the effective three-dimensional coordinate data of multiple lower object positions 71L and multiple upper object positions 71U.

[0117] Effective coordinate control unit 62 uses as follows Figure 15The function F2 shown is used to calculate the coordinate values ​​of the vertical direction Dz at multiple positions 78 on a virtual line 76 extending along the flange width direction Dw from the reference position 71 using measured three-dimensional coordinate data. The effective coordinate acquisition unit 62 uses this function F2 to extrapolate the coordinate values ​​of the vertical direction Dz at the reference position 71. Then, the effective coordinate acquisition unit 62 replaces the coordinate values ​​of the vertical direction Dz in each direction related to the reference position 71 shown in the reference three-dimensional shape data 58d with the previously calculated coordinate values ​​of the vertical direction Dz, setting them as the effective three-dimensional coordinate data for the reference position 71.

[0118] Furthermore, when the second mastering method is executed in the effective coordinate mastering process S2, the measured three-dimensional coordinate data at the following locations are accepted in the measured coordinate acceptance process S1.

[0119] The measured 3D coordinate data of multiple locations at each of the lower object midpoint positions 75L, on the virtual line of the lower midpoint extending along the flange width direction Dw from the lower object midpoint position 75L.

[0120] The measured 3D coordinate data of multiple locations at the midpoint 75U of each of the multiple upper objects, on the virtual line of the upper midpoint extending along the flange width direction Dw.

[0121] In the effective coordinate acquisition process S2, the effective coordinate acquisition unit 62 uses the measured three-dimensional coordinate data of multiple positions on the lower midpoint virtual line and multiple positions on the upper midpoint virtual line received in the measured coordinate acquisition process S1 to acquire the effective three-dimensional coordinate data of multiple lower object midpoint positions 75L and multiple upper object midpoint positions 75U, which serve as the reference positions, in the same way as described above.

[0122] Furthermore, in the effective coordinate mastering process S2, the effective coordinate mastering unit 62 uses effective three-dimensional coordinate data at multiple lower object midpoint positions 75L to estimate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. Similarly, the effective coordinate mastering unit 62 uses effective three-dimensional coordinate data at multiple upper object midpoint positions 75U to estimate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub. When the effective coordinate mastering unit 62 estimates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, it calculates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb based on the changing trends of the measured three-dimensional coordinate data at multiple lower object midpoint positions 75L, as described in the first mastering method. Furthermore, when the effective coordinate acquisition unit 62 estimates the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, the effective coordinate acquisition unit 62, in the same manner as the method described in the first acquisition method, calculates the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub based on the changing trend of the measured three-dimensional coordinate data at the midpoint position 75U of the multiple upper objects.

[0123] The above provides valid 3D coordinate data for multiple lower object positions 71L, multiple lower object midpoint positions 75L, lower first position 72La, lower second position 72Lb, multiple upper object positions 71U, multiple upper object midpoint positions 75U, upper first position 72Ua, and upper second position 72Ub.

[0124] In the first mastering method, the measured three-dimensional coordinate data of the reference position are set as the valid three-dimensional coordinate data of that reference position. Therefore, the valid three-dimensional coordinate data of the reference position is not only easily affected by local shape changes, but may also contain significant measurement errors. For example, if the three-dimensional shape measuring device 69 is a three-dimensional laser measuring instrument, and there are small suspended objects between the measured object and the three-dimensional laser measuring instrument, the three-dimensional position data measured by the three-dimensional laser measuring instrument will contain errors. On the other hand, in the second mastering method, the three-dimensional coordinate data of the reference position 71 is estimated based on the measured three-dimensional coordinate data at multiple locations, and this three-dimensional coordinate data is set as the valid three-dimensional coordinate data. Therefore, the second mastering method is not only less affected by local shape changes compared to the first mastering method, but also reduces the possibility of containing significant measurement errors.

[0125] The above estimates the vertical coordinates Dz of the lower first position 72La and the lower second position 72Lb. However, in the measured coordinate processing step S1, when the measured three-dimensional coordinate data below is received, the measured three-dimensional coordinate data can be used to obtain the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb using the same method as described above for obtaining the effective three-dimensional coordinate data of the reference position 71.

[0126] a. Measured three-dimensional coordinate data at multiple locations on a virtual line extending along the protruding direction of the first supported portion 35a from the lower first position 72La.

[0127] b. Measured three-dimensional coordinate data at multiple locations on a virtual line extending along the protruding direction of the second supported portion 35b from the lower second position 72Lb.

[0128] Here, the protruding direction of the supported portions 35a and 35b refers to the direction in which the supported portions 35a and 35b protrude from the flange along the upper surfaces 35ap and 35bp of the supported portions 35a and 35b.

[0129] As described above, the upper housing 30U sometimes also has a first supported portion and a second supported portion connected to the upper flange 32U. In this case, during the measured coordinate receiving process S1, when receiving the following measured three-dimensional coordinate data, the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub can be obtained using the measured three-dimensional coordinate data in the same way as the method described above for obtaining the effective three-dimensional coordinate data of the reference position.

[0130] a. Measured three-dimensional coordinate data at multiple locations along a virtual line extending from the first position 72Ua and along the protruding direction of the first supported portion.

[0131] b. Measured three-dimensional coordinate data at multiple locations along a virtual line extending from the second position 72Ub along the protruding direction of the second supported portion.

[0132] <Third Mastery Method>

[0133] When the third mastering method is executed in the effective coordinate mastering process S2, such as Figure 16 and Figure 17 As shown, in the measured coordinate processing step S1, measured three-dimensional coordinate data at multiple locations 78 covering the entire lower flange surface 33L and measured three-dimensional coordinate data at multiple locations covering the entire upper flange surface 33U are processed. It should be noted that... Figure 17It is a schematic diagram showing the relative positional relationship between the flange surface 80 and the reference position 81 shown in the reference three-dimensional shape data 58d and the point 85 shown in the measured three-dimensional coordinate data at multiple positions throughout the actual flange surface.

[0134] In the effective coordinate mastering process S2 of the third mastering method, the effective coordinate mastering unit 62 firstly... Figure 18 As shown, multiple polygon data are generated using measured three-dimensional coordinate data at multiple locations covering the entire flange surface. Polygon data refers to data that defines the plane of a polygon. The effective coordinate control unit 62 connects multiple points 85 that are close to each other among the points 85 shown in the measured three-dimensional coordinate data at multiple locations with line segments, and defines the polygonal plane enclosed by these line segments as polygon 86.

[0135] Next, the effective coordinate acquisition unit 62 selects from multiple polygon data, such as Figure 19 The diagram illustrates the extraction of multiple polygon data points that satisfy a certain condition. It should be noted that... Figure 19 In this process, a pattern is added to polygon 86a, which is determined by the extracted polygon data, while no pattern is added to polygon 86b, which is determined by the unextracted polygon data. Furthermore, Figure 19 The XY plane is a plane parallel to the flange surface 80 shown in the reference three-dimensional shape data 58d. Here, the aforementioned condition refers to the fact that the inclination of the polygon 86 determined by the polygon data relative to the flange surface 80 shown in the reference three-dimensional shape data 58d is within a specified inclination. The effective coordinate grasping unit 62 first calculates the normal n of each of the plurality of polygons 86. Next, the effective coordinate grasping unit 62 calculates the angle α between the perpendicular p of the polygon 86 relative to the flange surface 80 shown in the reference three-dimensional shape data 58d and the normal n of the polygon 86 for each of the plurality of polygons 86. Then, the effective coordinate grasping unit 62 extracts from the plurality of polygon data multiple polygons where the angle α between the perpendicular p of the polygon 80 and the normal n of the polygon 86 is within a specified angle (specified inclination).

[0136] The data extraction process is performed to remove the measured three-dimensional coordinate data of points on the edge wall of the flange surface and points on the inner circumferential surface of the bolt hole 34 penetrating the flange surface from the measured three-dimensional coordinate data of multiple points 85 received in the measured coordinate acceptance process S1. Therefore, as Figure 20 As shown, the number of points 85 after the extraction process is less than the number of points 85 before. In particular, in the reference shape model shown in the reference 3D shape data 58d, the number of points 85 after the extraction process is significantly less than the number of points 85 before regarding the surface 82 that is inclined relative to the flange surface 80.

[0137] Effective coordinate control section 62 continues as follows Figure 21The imaginary three-dimensional space, including the flange surface 80, is divided into multiple three-dimensional blocks 83 as shown. Then, the effective coordinate grasping unit 62 determines a representative point 87 in the three-dimensional block 83 as the target for each of the multiple three-dimensional blocks 83. Specifically, the effective coordinate grasping unit 62 sets the point that is the median of the multiple points 85 included in the three-dimensional block 83 as the target for the multiple polygons 86a, which is determined by the multiple polygon data extracted by the extraction process, as the representative point 87 in the three-dimensional block 83 as the target for the multiple polygons 83.

[0138] It should be noted that the representative point 87 can be determined by a robust assumption based on the Lorentz distribution of multiple points 85 included in polygon 86a, which is determined by multiple polygon data extracted through extraction processing, and a biweight assumption.

[0139] The effective coordinate grasping unit 62 generates surface shape data of the supplementary surfaces including the representative points 87 of each of the multiple three-dimensional blocks 83 by connecting the representative points 87 of each of the multiple three-dimensional blocks 83 through planes or curved surfaces that serve as complementary surfaces. This surface shape data is represented by a function F3 that represents the shape of the entire flange surface. The effective coordinate grasping unit 62 uses the surface shape data of the entire flange surface represented by the function F3 to calculate the effective three-dimensional coordinate data at the aforementioned reference position 71. It should be noted that the reference position 71 in the third grasping method is each of the multiple lower object positions 71L, multiple lower object midpoint positions 75L, multiple upper object positions 71U, and multiple upper object midpoint positions 75U.

[0140] In the effective coordinate mastering process S2 of the third mastering method, similarly to the first and second mastering methods, the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at the midpoint positions 75L of the lower object to estimate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. Furthermore, the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at the midpoint positions 75U of the upper object to estimate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0141] The above provides valid 3D coordinate data for multiple lower object positions 71L, multiple lower object midpoint positions 75L, lower first position 72La, lower second position 72Lb, multiple upper object positions 71U, multiple upper object midpoint positions 75U, upper first position 72Ua, and upper second position 72Ub.

[0142] The third mastery method is not only less susceptible to local shape changes compared to the second mastery method, but also reduces the possibility of large measurement errors. Furthermore, even in the presence of large-scale data loss caused by obstacles, the third mastery method can still obtain valid three-dimensional coordinate data at the reference location.

[0143] The above estimates the vertical coordinate values ​​of the lower first position 72La and the lower second position 72Lb in the vertical direction Dz. However, in the measured coordinate processing step S1, when receiving measured three-dimensional coordinate data at multiple positions covering the entire upper surface 35ap of the first supported portion 35a and multiple positions covering the entire upper surface 35bp of the second supported portion 35b, the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb can be obtained by the following method. Specifically, firstly, by including the measured three-dimensional coordinate data at multiple positions covering the entire upper surface 35ap of the first supported portion 35a and multiple positions covering the entire upper surface 35bp of the second supported portion 35b, the overall surface shape data of the upper surface 35ap of the first supported portion 35a, the upper surface 35bp of the second supported portion 35b, and the lower flange surface 33L are obtained. Then, the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb are obtained using the surface shape data of the entire surface represented by the function.

[0144] As described above, the upper shell 30U sometimes also has a first supported portion and a second supported portion connected to the upper flange 32U. In this case, during the measured coordinate receiving process S1, measured three-dimensional coordinate data at multiple locations covering the entire lower surface of the first supported portion connected to the upper flange 32U and at multiple locations covering the entire lower surface of the second supported portion connected to the upper flange 32U can be received, and the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub can be obtained by the following method. Specifically, firstly, the measured three-dimensional coordinate data at multiple locations covering the entire lower surface of the first supported portion and at multiple locations covering the entire lower surface of the second supported portion are included to obtain the overall surface shape data of the lower surface of the first supported portion, the lower surface of the second supported portion, and the upper flange surface 33U. Then, the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub are obtained using the surface shape data of the entire surface represented by a function.

[0145] <Fourth Method of Mastery>

[0146] When the fourth mastering method is executed in the effective coordinate mastering process S2, such as Figure 22 and Figure 23As shown, in the measured coordinate acceptance process S1, measured three-dimensional coordinate data at multiple locations 78 within the reference measurement area 79, including the reference location 71, on the flange surface are accepted. It should be noted that... Figure 23 This is a schematic diagram showing the relative positional relationship between the flange surface 80 shown in the reference three-dimensional shape data 58d and the points 85 shown in the measured three-dimensional coordinate data at multiple locations in the actual flange surface, referring to the measurement area 79. Here, as... Figure 22 As shown, the reference measurement area 79 refers to the region within a distance of 1 / 20 to 1 / 2 of the flange width at reference position 71, for example, starting from reference position 71. Therefore, this reference measurement area 79 is also the lower measurement area including the lower object position 71L in the lower flange surface 33L, and the upper measurement area including the upper object position 71U in the upper flange surface 33U. Furthermore, this reference measurement area 79 is also the lower midpoint measurement area including the lower object midpoint position 75L in the lower flange surface 33L, and the upper midpoint measurement area including the upper object midpoint position 75U in the upper flange surface 33U. It should be noted that the three-dimensional coordinate data of the reference position 71 here is the three-dimensional coordinate data of the reference position shown in the reference three-dimensional shape data 58d. In addition, the number of measured three-dimensional coordinate data within the reference measurement area 79 received in the measured coordinate receiving process S1 is, for example, 10 or more. Therefore, the number of measured three-dimensional coordinate data within the reference measurement area 79 received in the measured coordinate acceptance process S1 of the fourth mastering method is greater than the number of measured three-dimensional coordinate data of the position on the virtual line received in the measured coordinate acceptance process S1 of the second mastering method.

[0147] In the effective coordinate mastering step S2 of the fourth mastering method, the effective coordinate mastering unit 62 first generates multiple polygon data using measured three-dimensional coordinate data at multiple locations 78, similar to the method described in the third mastering method. Then, it extracts multiple polygon data that satisfy a certain condition from the multiple polygon data. The result is, as follows: Figure 24 As shown, the number of points 85 in the extracted and processed measured 3D coordinate data is less than the number of points 85 in the previous data.

[0148] The effective coordinate mastering section 62 then follows the same method as described in the third mastering method, such as... Figure 25 The imaginary three-dimensional space, including the flange surface 80, is divided into multiple three-dimensional blocks 83 as shown. Then, the effective coordinate grasping unit 62 determines a representative point 87 in each of the multiple three-dimensional blocks 83 as the object of the three-dimensional block 83.

[0149] The effective coordinate acquisition unit 62 generates surface shape data for supplementary surfaces including the representative points 87 of each of the multiple three-dimensional blocks 83 by connecting the representative points 87 of each of the multiple three-dimensional blocks 83 through planes or curved surfaces that serve as complementary surfaces. This surface shape data is represented by a function F4 that represents the shape within the reference measurement area 79 in the flange surface. The effective coordinate acquisition unit 62 uses the surface shape data represented by the function F4 to determine the effective three-dimensional coordinate data at the aforementioned reference position 71.

[0150] In the effective coordinate mastering step S2 of the fourth mastering method, similar to the effective coordinate mastering steps S2 of the first and second mastering methods, the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at the midpoint positions 75L of the lower object to estimate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. Furthermore, the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at the midpoint positions 75U of the upper object to estimate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0151] The above provides valid 3D coordinate data for multiple lower object positions 71L, multiple lower object midpoint positions 75L, lower first position 72La, lower second position 72Lb, multiple upper object positions 71U, multiple upper object midpoint positions 75U, upper first position 72Ua, and upper second position 72Ub.

[0152] The fourth mastery method is not only less susceptible to local shape changes compared to the second mastery method, but also reduces the possibility of large measurement errors. Furthermore, even in cases of extensive data loss caused by obstacles, the fourth mastery method can still obtain valid three-dimensional coordinate data at the reference location.

[0153] The above-mentioned effective three-dimensional coordinate data at the reference position 71 is obtained by using the surface shape data within the reference measurement area 79 in the flange surface. However, it is also possible not to generate surface shape data, but instead set the coordinate values ​​of the vertical direction Dz at the representative point 87 of the three-dimensional block 83, including the reference position 71, as the coordinate values ​​of the vertical direction Dz at the reference position 71.

[0154] The above estimates the coordinate values ​​of the vertical direction Dz for the lower first position 72La and the lower second position 72Lb. However, in the measured coordinate processing step S1, when receiving measured three-dimensional coordinate data at multiple positions covering the entire upper surface 35ap of the first supported part 35a and multiple positions covering the entire upper surface 35bp of the second supported part 35b, the effective three-dimensional coordinate data for the lower first position 72La and the lower second position 72Lb can be obtained by the following method. Specifically, firstly, multiple polygon data are generated using the measured three-dimensional coordinate data at multiple positions covering the entire upper surface 35ap of the first supported part 35a, and multiple polygon data satisfying a certain condition are extracted from the multiple polygon data. Then, a representative point is determined from the multiple points shown by the extracted polygon data, and the vertical direction Dz coordinate value of the representative point is set as the vertical direction Dz coordinate value of the lower first position 72La. Similarly, a representative point is determined using measured three-dimensional coordinate data at multiple locations covering the entire upper surface 35ap of the second supported portion 35b, and the coordinate value of the vertical direction Dz at this representative point is set as the coordinate value of the vertical direction Dz at the next second position 72Lb.

[0155] As described above, the upper shell 30U sometimes also has a first supported portion and a second supported portion connected to the upper flange 32U. In this case, during the measured coordinate receiving process S1, measured three-dimensional coordinate data are received at multiple locations covering the entire lower surface of the first supported portion connected to the upper flange 32U and at multiple locations covering the entire lower surface of the second supported portion 35b connected to the upper flange 32U. Then, similarly as above, representative points on each surface are determined using the received measured three-dimensional coordinate data at the multiple locations, and the coordinate values ​​of the vertical direction Dz at the representative points on each surface are set as the coordinate values ​​of the vertical direction Dz at the upper first position 72Ua and the upper second position 72Ub, respectively.

[0156] It should be noted that the effective 3D coordinate data of the upper object midpoint position 75U and the lower object midpoint position 75L can be obtained using the first mastering method, and the effective 3D coordinate data of the upper object position 71U and the lower object position 71L can be obtained using the second or fourth mastering method. Alternatively, the effective 3D coordinate data of the upper object midpoint position 75U and the lower object midpoint position 75L can also be obtained using the second mastering method, and the effective 3D coordinate data of the upper object position 71U and the lower object position 71L can be obtained using the first or fourth mastering method. Furthermore, the effective 3D coordinate data of the upper object midpoint position 75U and the lower object midpoint position 75L can also be obtained using the fourth mastering method, and the effective 3D coordinate data of the upper object position 71U and the lower object position 71L can be obtained using the first or second mastering method.

[0157] As described above, in this embodiment, the midpoint of the vertical direction Dz of the upper object midpoint position 75U in the upper flange surface 33U and the lower object midpoint position 75L in the lower flange surface 33L is set as the object contact position 73. Furthermore, in this embodiment, the difference between the upper object position 71U in the upper flange surface 33U for which the vertical displacement Dz is desired and the vertical displacement Dz of the object contact position 73 is set as the displacement of the upper object position 71U. Similarly, in this embodiment, the difference between the lower object position 71L in the lower flange surface 33L for which the vertical displacement Dz is desired and the vertical displacement Dz of the object contact position 73 is set as the displacement of the lower object position 71L. Therefore, in this embodiment, even without using finite element models of the lower half-shell 30L and the upper half-shell 30U to simulate their deformation, the vertical displacement Dz of the upper object position 71U and the lower object position 71L can be calculated. Thus, in this embodiment, the computational load when calculating the displacement can be reduced. Therefore, in this embodiment, the preparation period for estimating the flange surface can be shortened, and the estimation cost can be reduced.

[0158] Furthermore, the midpoint of the vertical direction Dz of the upper object position 71U in the upper flange surface 33U and the lower object position 71L in the lower flange surface 33L can also be set as the object contact position 73. The deformation of the flange surface includes not only the deformation in the vertical direction Dz that accompanies the change in the axial direction Dy, but also... Figure 9 The deformation in the vertical direction Dz accompanying the change in the lateral direction Dx is also included. Assuming the lower object position 71L and the upper object position 71U are the positions of the inner edges in the flange surface, the object contact position 73 is determined using the upper object position 71U and the lower object position 71L as described above. In this case, the deformation in the vertical direction Dz accompanying the change in the lateral direction Dx in the flange surface is extremely reflected in the determined object contact position 73, increasing the error in the vertical direction Dz of the object contact position 73. As a result, the error in the displacement of the upper object position 71U and the lower object position 71L sometimes increases. On the other hand, in this embodiment, the object contact position 73 is defined as the midpoint of the vertical direction Dz of the upper object midpoint position 75U, which is the midpoint of the lateral direction Dx in the upper flange surface 33U, and the lower object midpoint position 75L, which is the midpoint of the lateral direction Dx in the lower flange surface 33L. Therefore, in this embodiment, the deformation of the vertical direction Dz accompanying the change in the transverse direction Dx in the flange surface will not be extremely reflected in the calculated object contact position 73, which can reduce the error of the vertical direction Dz of the object contact position 73. As a result, the error of the displacement of the upper object position 71U and the lower object position 71L can be reduced.

[0159] The embodiments of this disclosure have been described in detail above, but this disclosure is not limited to the above embodiments. Various additions, modifications, substitutions, partial deletions, etc., can be made without departing from the conceptual idea and spirit of the invention derived from the claims and their equivalents.

[0160] <Postscript>

[0161] The method for estimating the flange displacement of the rotating machinery in the above embodiments is as follows, for example.

[0162] (1) The method for estimating the flange displacement of rotating machinery in the first scheme is applied to the following rotating machinery.

[0163] The rotating machinery includes: a rotor 15, capable of rotating about an axis Ar extending in a horizontal direction; a housing 30 covering the outer periphery of the rotor 15; stationary parts disposed within and assembled into the housing 30; and a bracket 11 supporting the housing 30 from below. The housing 30 has: an upper half-housing 30U; a lower half-housing 30L; and a plurality of bolts 39 fastening the upper half-housing 30U and the lower half-housing 30L. The upper half-housing 30U has an upper flange 32U with an upper flange surface 33U facing downwards. The lower half-housing 30L has: a lower flange 32L with a lower flange surface 33L facing upwards and opposing the upper flange surface 33U in the vertical direction Dz; and a first supported portion 35a and a second supported portion 35b connected to the lower flange 32L, supported from below by the bracket 11, and separated from each other in the axial direction Dy extending from the axis Ar. Bolt holes 34 are formed in the upper flange 32U and the lower flange 32L, which are through in the vertical direction Dz and can be inserted into the plurality of bolts 39 respectively.

[0164] In the above method for estimating the flange displacement of rotating machinery, the following steps are performed:

[0165] The measured coordinate acceptance process S1 accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and the lower flange surface 33L in an open state. The open state refers to the state where the rotating machinery has been disassembled but the upper half-shell 30U and lower half-shell 30L are not secured by the multiple bolts 39. The effective coordinate mastering process S2 uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface 33L to master the effective three-dimensional coordinate data at the lower first position 72La, lower second position 72Lb, lower object position 71L, and lower object midpoint position 75L. It also uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U to master the effective three-dimensional coordinate data at the upper first position 72Ua, upper second position 72Ub, upper object position 71U, and upper object midpoint position 75U. The coordinate modification process S3 modifies the effective three-dimensional coordinate data mastered in the effective coordinate mastering process S2, so that the effective coordinate mastering process… The effective three-dimensional coordinate data of the lower first position 72La obtained in S2 are consistent with the effective three-dimensional coordinate data of the upper first position 72Ua, and the effective three-dimensional coordinate data of the lower second position 72Lb obtained in the effective coordinate obtaining process S2 are consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; the contact position estimation process S4 uses the effective three-dimensional coordinate data of the lower object midpoint position 75L and the upper object midpoint position 75U after being changed by the coordinate changing process S3 to obtain the effective three-dimensional coordinate data of the object contact position 73, which is the midpoint of the lower object midpoint position 75L and the upper object midpoint position 75U in the vertical direction Dz; and the displacement calculation process S5 calculates the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz when changing from the open state to the tight state, where the tight state refers to the state in which the upper half shell 30U and the lower half shell 30L are fastened by the plurality of bolts 39. The lower first position 72La is a position in the surface connected to the lower flange surface 33L that coincides with the first representative position 74a of the first supported portion 35a in the horizontal direction. The lower second position 72Lb is a position in the surface connected to the lower flange surface 33L that coincides with the second representative position 74b of the second supported portion 35b in the horizontal direction. The lower object position 71L is a position in the lower flange surface 33L where a vertical displacement Dz is desired when transitioning from the open state to the fastened state. The lower object midpoint position 75L is a position in the lower flange surface 33L that is the midpoint of a transverse direction Dx perpendicular to the axial direction Dy in the horizontal direction, and the position of the axial direction Dy coincides with the lower object position 71L.The upper first position 72Ua is a position in the surface connected to the upper flange surface 33U that coincides with the first representative position 74a of the first supported portion 35a in the horizontal direction. The upper second position 72Ub is a position in the surface connected to the upper flange surface 33U that coincides with the second representative position 74b of the second supported portion 35b in the horizontal direction. The upper object position 71U is a position in the upper flange surface 33U that coincides with the lower object position 71L in the horizontal direction. The upper object midpoint position 75U is the midpoint on the transverse direction Dx in the upper flange surface 33U, and is a position in the axial direction Dy that coincides with the lower object position 71L. In the displacement calculation step S5, the difference between the position of the lower object position 71L in the vertical direction Dz shown by the effective three-dimensional coordinate data after the coordinate change step S3 and the position of the object contact position 73 in the vertical direction Dz is set as the displacement of the lower object position 71L in the vertical direction Dz. The difference between the position of the upper object position 71U in the vertical direction Dz shown by the effective three-dimensional coordinate data after the coordinate change step S3 and the position of the object contact position 73 in the vertical direction Dz is set as the displacement of the upper object position 71U in the vertical direction Dz.

[0166] In this scheme, the midpoint of the upper object midpoint 75U in the upper flange surface 33U and the lower object midpoint 75L in the lower flange surface 33L in the vertical direction Dz is set as the object contact position 73. Furthermore, in this scheme, the difference between the upper object position 71U in the upper flange surface 33U for which the vertical displacement Dz is desired and the vertical displacement Dz of the object contact position 73 in the vertical direction Dz is set as the displacement of the upper object position 71U. Similarly, in this scheme, the difference between the lower object position 71L in the lower flange surface 33L for which the vertical displacement Dz is desired and the vertical displacement Dz of the object contact position 73 in the vertical direction Dz is set as the displacement of the lower object position 71L. Therefore, in this scheme, even without using finite element models of the lower half-shell 30L and the upper half-shell 30U to simulate their deformation, the vertical displacement Dz of the upper object position 71U and the lower object position 71L can be calculated. Therefore, this scheme can reduce the computational load when calculating the displacement.

[0167] Furthermore, the midpoint of the vertical direction Dz of the upper object position 71U in the upper flange surface 33U and the lower object position 71L in the lower flange surface 33L can also be set as the object contact position 73. The deformation of the flange surface includes not only the deformation of the vertical direction Dz accompanying the change of the axial direction Dy, but also the deformation of the vertical direction Dz accompanying the change of the transverse direction Dx. Assuming that the lower object position 71L and the upper object position 71U are the positions of the inner edges in the flange surface, the object contact position 73 can be obtained using the upper object position 71U and the lower object position 71L as described above. In this case, the deformation of the vertical direction Dz accompanying the change of the transverse direction Dx in the flange surface is extremely reflected in the obtained object contact position 73, and the error of the vertical direction Dz of the object contact position 73 increases. As a result, sometimes the error of the displacement of the upper object position 71U and the lower object position 71L increases. On the other hand, in this solution, the object contact position 73 is defined as the midpoint of the upper object midpoint position 75U, which is the midpoint of the transverse direction Dx in the upper flange surface 33U, and the midpoint of the lower object midpoint position 75L, which is the midpoint of the transverse direction Dx in the lower flange surface 33L. Therefore, in this solution, the deformation of the vertical direction Dz accompanying the change of the transverse direction Dx in the flange surface will not be extremely reflected in the calculated object contact position 73, thus reducing the error of the vertical direction Dz of the object contact position 73. As a result, the error of the displacement of the upper object position 71U and the lower object position 71L can be reduced.

[0168] (2) In the method for estimating the flange displacement of rotating machinery in the second scheme,

[0169] In the method for estimating the flange displacement of rotating machinery in the first scheme, the lower object position 71L is the position where the stationary part is arranged in the axial direction Dy, and is the position of the inner edge in the lower flange surface 33L.

[0170] From the perspective of rotating machinery performance, it is necessary to manage the radial distance Dr between the stationary part and the rotor 15. The inventors discovered that the change in the radial distance Dr between the stationary part and the rotor 15, resulting from the deformation of the lower half-shell 30L and upper half-shell 30U caused by the housing 30 changing from an open state to a fixed state, is dominated by deformation at the following locations: the position where the stationary part storage portion 36 is formed in the axial direction Dy of the lower flange surface 33L and the position of the inner edge of the lower flange surface 33L; and the position where the stationary part storage portion 36 is formed in the axial direction Dy of the upper flange surface 33U and the position of the inner edge of the upper flange surface 33U. Therefore, in this solution, the radial distance Dr between the stationary part and the rotor 15 when the housing 30 changes from an open state to a fixed state can be managed with high precision.

[0171] (3) In the method for estimating the flange displacement of rotating machinery in the third scheme,

[0172] In the method for estimating the flange displacement of rotating machinery in the first or second scheme, in the measured coordinate acceptance step S1, the measured three-dimensional coordinate data at the midpoint position 75L of the lower object and the midpoint position 75U of the upper object are accepted. In the effective coordinate mastering step S2, the measured three-dimensional coordinate data at the midpoint position 75L of the lower object is kept as is and mastered as the effective three-dimensional coordinate data at the midpoint position 75L of the lower object, and the measured three-dimensional coordinate data at the midpoint position 75U of the upper object obtained in the measured coordinate acceptance step S1 is kept as is and mastered as the effective three-dimensional coordinate data at the midpoint position 75U of the upper object.

[0173] In this scheme, the measured three-dimensional coordinate data of the lower object midpoint 75L and the upper object midpoint 75U received in the measured coordinate acceptance process S1 are kept as valid three-dimensional coordinate data of the lower object midpoint 75L and the upper object midpoint 75U, thus reducing the computational load.

[0174] (4) In the fourth scheme's method for estimating the flange displacement of rotating machinery,

[0175] In the method for estimating the flange displacement of rotating machinery according to the first or second scheme, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple locations on a virtual line extending along the flange width direction Dw, passing through the lower object's midpoint position 75L, are received; and measured three-dimensional coordinate data at multiple locations on a virtual line extending along the flange width direction Dw, passing through the upper object's midpoint position 75U, are also received. In the effective coordinate mastering step S2, effective three-dimensional coordinate data at the lower object's midpoint position 75L are calculated based on the measured three-dimensional coordinate data at multiple locations on the lower object's virtual line; and effective three-dimensional coordinate data at the upper object's midpoint position 75U are calculated based on the measured three-dimensional coordinate data at multiple locations on the upper object's virtual line.

[0176] In this scheme, the effective three-dimensional coordinate data of the lower object's midpoint position 75L is obtained based on the measured three-dimensional coordinate data at multiple locations on the lower midpoint virtual line, and the effective three-dimensional coordinate data of the upper object's midpoint position 75U is obtained based on the measured three-dimensional coordinate data at multiple locations on the upper midpoint virtual line. Therefore, in this scheme, the effective three-dimensional coordinate data for the lower object's midpoint position 75L and the upper object's midpoint position 75U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of including large measurement errors.

[0177] (5) In the fifth scheme's method for estimating the flange displacement of rotating machinery,

[0178] In the method for estimating the flange displacement of rotating machinery in the first or second scheme, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple locations within the lower midpoint measurement area (including the lower object midpoint position 75L) on the lower flange surface 33L are received, and measured three-dimensional coordinate data at multiple locations within the upper midpoint measurement area (including the upper object midpoint position 75U) on the upper flange surface 33U are also received. In the effective coordinate mastering step S2, the measured three-dimensional coordinate data at the lower object midpoint position 75L is obtained using the measured three-dimensional coordinate data at the multiple locations within the lower midpoint measurement area received in the measured coordinate receiving step S1, and the effective three-dimensional coordinate data at the upper object midpoint position 75U is obtained using the measured three-dimensional coordinate data at the multiple locations within the upper midpoint measurement area received in the measured coordinate receiving step S1.

[0179] In this scheme, the effective three-dimensional coordinate data of the lower object's midpoint position 75L is obtained based on the measured three-dimensional coordinate data at multiple locations within the lower midpoint measurement area, and the effective three-dimensional coordinate data of the upper object's midpoint position 75U is obtained based on the measured three-dimensional coordinate data at multiple locations within the upper midpoint measurement area. Therefore, in this scheme, the effective three-dimensional coordinate data for the lower object's midpoint position 75L and the upper object's midpoint position 75U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of including large measurement errors.

[0180] (6) In the method for estimating the flange displacement of rotating machinery in the sixth scheme,

[0181] In the method for estimating the flange displacement of rotating machinery according to the first or second scheme, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at the following locations are received: multiple lower midpoint positions 75Lx, which are the midpoints on the transverse Dx of the lower flange surface 33L, and their positions on the axial direction Dy are all different; and multiple upper midpoint positions 75Ux, which are the midpoints on the transverse Dx of the upper flange surface 33U, and their positions on the axial direction Dy are all different. In the effective coordinate mastering step S2, the effective three-dimensional coordinate data at the lower object midpoint position 75L is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions 75Lx, and the effective three-dimensional coordinate data at the upper object midpoint position 75U is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions 75Ux.

[0182] In this solution, the effective three-dimensional coordinate data of the lower object's midpoint position 75L is obtained based on the variation trend of measured three-dimensional coordinate data at multiple lower midpoint positions 75Lx, and the effective three-dimensional coordinate data of the upper object's midpoint position 75U is obtained based on the variation trend of measured three-dimensional coordinate data at multiple upper midpoint positions 75Ux. Therefore, even if the measured three-dimensional coordinate data of the lower object's midpoint position 75L and the upper object's midpoint position 75U are not processed in the measured coordinate processing step S1, the effective three-dimensional coordinate data at these positions can still be obtained.

[0183] (7) In the method for estimating the flange displacement of rotating machinery in the seventh scheme,

[0184] In the method for estimating the flange displacement of rotating machinery in any of the first to sixth schemes, the measured three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb are received in the measured coordinate acceptance step S1. In the effective coordinate mastering step S2, the measured three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb obtained in the measured coordinate acceptance step S1 are kept as is and mastered as the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb.

[0185] In this scheme, the measured three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb received in the measured coordinate acceptance process S1 are kept as valid three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb, thus reducing the computational load.

[0186] (8) In the method for estimating the flange displacement of rotating machinery in the eighth scheme,

[0187] In the method for estimating the flange displacement of rotating machinery in any of the first to sixth schemes, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple locations on the surface of the first supported portion 35a and measured three-dimensional coordinate data at multiple locations on the surface of the second supported portion 35b are received. The surfaces of the first supported portion 35a and the second supported portion 35b are surfaces connected to the flange surface of one of the upper flange surface 33U and the lower flange surface 33L. In the effective coordinate obtaining step S2, effective three-dimensional coordinate data at the lower first position 72La is calculated based on the measured three-dimensional coordinate data at multiple locations on the surface of the first supported portion 35a obtained in the measured coordinate receiving step S1, and effective three-dimensional coordinate data at the lower second position 72Lb is calculated based on the measured three-dimensional coordinate data at multiple locations on the surface of the second supported portion 35b obtained in the measured coordinate receiving step S1.

[0188] In this solution, the effective three-dimensional coordinate data of the lower first position 72La is obtained based on multiple measured three-dimensional coordinate data from the upper surface 35ap of the first supported part 35a received in the measured coordinate receiving process S1. Similarly, the effective three-dimensional coordinate data of the lower second position 72Lb is obtained based on multiple measured three-dimensional coordinate data from the upper surface 35bp of the second supported part 35b received in the same coordinate receiving process S1. Therefore, in this solution, the effective three-dimensional coordinate data for the lower first position 72La and the lower second position 72Lb are not only less susceptible to local shape changes, but also reduce the possibility of large measurement errors.

[0189] (9) In the method for estimating the flange displacement of rotating machinery in the ninth scheme,

[0190] In the method for estimating the flange displacement of rotating machinery in the sixth scheme, in the effective coordinate acquisition process S2, the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75L of the multiple lower objects, and the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75U of the multiple upper objects.

[0191] In this scheme, the effective three-dimensional coordinates of the lower first position 72La and the lower second position 72Lb are determined based on the changing trends of the effective three-dimensional coordinate data at the midpoints of multiple lower objects at position 75L. Similarly, the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub are determined based on the changing trends of the effective three-dimensional coordinate data at the midpoints of multiple upper objects at position 75U. Therefore, even if the measured three-dimensional coordinate data of the lower first position 72La, the lower second position 72Lb, the upper first position 72Ua, and the upper second position 72Ub are not processed in the measured coordinate processing step S1, the effective three-dimensional coordinate data at these positions can still be obtained.

[0192] (10) In the method for estimating the flange displacement of rotating machinery in the tenth scheme,

[0193] In the method for estimating the flange displacement of rotating machinery in any of the first to ninth schemes, in the measured coordinate acceptance step S1, the measured three-dimensional coordinate data at the lower object position 71L and the upper object position 71U are accepted. In the effective coordinate mastering step S2, the measured three-dimensional coordinate data at the lower object position 71L is mastered as the effective three-dimensional coordinate data at the lower object position 71L, and the measured three-dimensional coordinate data at the upper object position 71U obtained in the measured coordinate acceptance step S1 is mastered as the effective three-dimensional coordinate data at the upper object position 71U.

[0194] In this scheme, the measured three-dimensional coordinate data of the lower object position 71L and the upper object position 71U received in the measured coordinate acceptance process S1 are kept as valid three-dimensional coordinate data of the lower object position 71L and the upper object position 71U, thus reducing the computational load.

[0195] (11) In the method for estimating the flange displacement of rotating machinery in the eleventh scheme,

[0196] In the method for estimating the flange displacement of rotating machinery according to any one of the first to ninth schemes, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple positions on a lower virtual line extending along the flange width direction Dw through the lower object position 71L are received, and measured three-dimensional coordinate data at multiple positions on an upper virtual line extending along the flange width direction Dw through the upper object position 71U are also received. In the effective coordinate mastering step S2, effective three-dimensional coordinate data at the lower object position 71L are calculated based on the measured three-dimensional coordinate data at multiple positions on the lower virtual line, and effective three-dimensional coordinate data at the upper object position 71U are calculated based on the measured three-dimensional coordinate data at multiple positions on the upper virtual line.

[0197] In this scheme, the effective three-dimensional coordinate data of the lower object position 71L is obtained based on the measured three-dimensional coordinate data at multiple locations on the lower virtual line, and the effective three-dimensional coordinate data of the upper object position 71U is obtained based on the measured three-dimensional coordinate data at multiple locations on the upper virtual line. Therefore, in this scheme, the effective three-dimensional coordinate data of the lower object position 71L and the upper object position 71U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of including large measurement errors.

[0198] (12) In the method for estimating the flange displacement of rotating machinery in the twelfth scheme,

[0199] In the method for estimating the flange displacement of rotating machinery in any of the first to ninth schemes, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple locations in the lower measuring region including the lower object position 71L in the lower flange surface 33L are received, and measured three-dimensional coordinate data at multiple locations in the upper measuring region including the upper object position 71U in the upper flange surface 33U are also received. In the effective coordinate mastering step S2, the effective three-dimensional coordinate data at the lower object position 71L is obtained using the measured three-dimensional coordinate data at multiple locations in the lower measuring region received in the measured coordinate receiving step S1, and the effective three-dimensional coordinate data at the upper object position 71U is obtained using the measured three-dimensional coordinate data at multiple locations in the upper measuring region received in the measured coordinate receiving step S1.

[0200] In this scheme, the effective three-dimensional coordinate data of the lower object position 71L is obtained based on the measured three-dimensional coordinate data at multiple locations within the lower measurement area, and the effective three-dimensional coordinate data of the upper object position 71U is obtained based on the measured three-dimensional coordinate data at multiple locations within the lower measurement area. Therefore, in this scheme, the effective three-dimensional coordinate data for the lower object position 71L and the upper object position 71U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of including large measurement errors.

[0201] (13) In the method for estimating the flange displacement of rotating machinery in the thirteenth scheme,

[0202] In the method for estimating the flange displacement of rotating machinery according to the first or second scheme, in the measured coordinate receiving step S1, measured three-dimensional coordinate data covering multiple positions throughout the entire lower flange surface 33L are received, and measured three-dimensional coordinate data covering multiple positions throughout the entire upper flange surface 33U are also received. In the effective coordinate mastering step S2, the measured three-dimensional coordinate data covering multiple positions throughout the entire lower flange surface 33L received in the measured coordinate receiving step S1 are used to determine the shape data of the lower flange surface 33L representing the three-dimensional shape of the entire lower flange surface 33L, and the measured three-dimensional coordinate data covering multiple positions throughout the entire upper flange surface 33U received in the measured coordinate receiving step S1 are used to determine the shape data of the upper flange surface 33U representing the three-dimensional shape of the entire upper flange surface 33U. Furthermore, in the effective coordinate acquisition process S2, the shape data of the lower flange surface 33L is used to obtain the effective three-dimensional coordinate data of the lower object midpoint position 75L, and the shape data of the upper flange surface 33U is used to obtain the effective three-dimensional coordinate data of the upper object midpoint position 75U.

[0203] In this scheme, the effective three-dimensional coordinate data of the lower object's midpoint position 75L is obtained based on measured three-dimensional coordinate data at multiple locations throughout the entire lower flange surface 33L, and the effective three-dimensional coordinate data of the upper object's position 75U is obtained based on measured three-dimensional coordinate data at multiple locations throughout the entire upper flange surface 33U. Therefore, in this scheme, the effective three-dimensional coordinate data for the lower object's midpoint position 75L and the upper object's midpoint position 75U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of large measurement errors. Furthermore, in this scheme, even in the presence of large-scale data loss caused by obstacles, etc., the effective three-dimensional coordinate data at these locations can still be obtained.

[0204] (14) In the method for estimating the flange displacement of rotating machinery in the fourteenth scheme,

[0205] In the method for estimating the flange displacement of rotating machinery in the thirteenth scheme, in the effective coordinate acquisition step S2, the shape data of the lower flange surface 33L is used to obtain the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, and the shape data of the upper flange surface 33U is used to obtain the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0206] In this scheme, effective three-dimensional coordinate data for the lower first position 72La and the lower second position 72Lb are obtained based on measured three-dimensional coordinate data at multiple locations covering the entire lower flange surface 33L. Similarly, effective three-dimensional coordinate data for the upper first position 72Ua and the upper second position 72Ub are obtained based on measured three-dimensional coordinate data at multiple locations covering the entire upper flange surface 33U. Therefore, even without access to measured three-dimensional coordinate data for the lower first position 72La, the lower second position 72Lb, the upper first position 72Ua, and the upper second position 72Ub, effective three-dimensional coordinate data for these positions can be obtained. Furthermore, in this scheme, the effective three-dimensional coordinate data for the lower first position 72La, the lower second position 72Lb, the upper first position 72Ua, and the upper second position 72Ub are less susceptible to local shape variations and the possibility of significant measurement errors is reduced. Moreover, even in the event of large-scale data loss due to obstacles, effective three-dimensional coordinate data for these positions can still be obtained.

[0207] (15) In the method for estimating the flange displacement of rotating machinery in the fifteenth scheme,

[0208] In the method for estimating the flange displacement of rotating machinery in the thirteenth or fourteenth scheme, in the effective coordinate acquisition step S2, the shape data of the lower flange surface 33L is used to obtain the effective three-dimensional coordinate data at the lower object position 71L, and the shape data of the upper flange surface 33U is used to obtain the effective three-dimensional coordinate data at the upper object position 71U.

[0209] In this scheme, the effective three-dimensional coordinate data of the lower object position 71L is obtained based on measured three-dimensional coordinate data at multiple locations throughout the lower flange surface 33L, and the effective three-dimensional coordinate data of the upper object position 71U is obtained based on measured three-dimensional coordinate data at multiple locations throughout the upper flange surface 33U. Therefore, in this scheme, the effective three-dimensional coordinate data for the lower object position 71L and the upper object position 71U are not only less susceptible to the influence of local shape changes, but also reduce the possibility of large measurement errors. Furthermore, in this scheme, even in the presence of large-scale data loss caused by obstacles, etc., the effective three-dimensional coordinate data for these locations can be obtained.

[0210] The procedure for estimating the flange displacement of the rotating machinery in the above embodiments is as follows, for example.

[0211] (16) The flange displacement estimation procedure of the sixteenth scheme is applied to the following rotating machinery.

[0212] The rotating machinery includes: a rotor 15, capable of rotating about an axis Ar extending in a horizontal direction; a housing 30 covering the outer periphery of the rotor 15; stationary parts disposed within and assembled into the housing 30; and a bracket 11 supporting the housing 30 from below. The housing 30 has: an upper half-housing 30U; a lower half-housing 30L; and a plurality of bolts 39 fastening the upper half-housing 30U and the lower half-housing 30L. The upper half-housing 30U has an upper flange 32U with an upper flange surface 33U facing downwards. The lower half-housing 30L has: a lower flange 32L with a lower flange surface 33L facing upwards and opposing the upper flange surface 33U in the vertical direction Dz; and a first supported portion 35a and a second supported portion 35b connected to the lower flange 32L, supported from below by the bracket 11, and separated from each other in the axial direction Dy extending from the axis Ar. Bolt holes 34 are formed in the upper flange 32U and the lower flange 32L, which are through in the vertical direction Dz and can be inserted into the plurality of bolts 39 respectively.

[0213] The above-described flange displacement estimation procedure 58p for rotating machinery causes the computer to execute the following steps: Measured coordinate acceptance step S1, accepting measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and the lower flange surface 33L in an open state, wherein the open state refers to the state after disassembly of the rotating machinery where the upper half-shell 30U and the lower half-shell 30L are not secured by the multiple bolts 39; Effective coordinate mastering step S2, using multiple positions on the lower flange surface 33L... The measured three-dimensional coordinate data at the location is used to obtain the effective three-dimensional coordinate data at the lower first position 72La, the lower second position 72Lb, the lower object position 71L, and the lower object midpoint position 75L. Furthermore, the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U are used to obtain the effective three-dimensional coordinate data at the upper first position 72Ua, the upper second position 72Ub, the upper object position 71U, and the upper object midpoint position 75U. The coordinate change process S3 changes the effective three-dimensional coordinate data obtained in the effective coordinate obtaining process S2. The effective three-dimensional coordinate data of the lower first position 72La obtained in the effective coordinate mastering process S2 are consistent with the effective three-dimensional coordinate data of the upper first position 72Ua, and the effective three-dimensional coordinate data of the lower second position 72Lb obtained in the effective coordinate mastering process S2 are consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; the contact position estimation process S4 uses the effective three-dimensional coordinate data of the lower object midpoint position 75L and the upper object midpoint position 75U after being changed by the coordinate changing process S3 to obtain the effective three-dimensional coordinate data of the object contact position 73, which is the midpoint of the lower object midpoint position 75L and the upper object midpoint position 75U in the vertical direction Dz; and the displacement calculation process S5 calculates the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz when changing from the open state to the tight state, where the tight state refers to the state in which the upper half shell 30U and the lower half shell 30L are fastened by the plurality of bolts 39. The lower first position 72La is the position in the surface connected to the lower flange surface 33L that coincides with the first representative position 74a of the first supported portion 35a in the horizontal direction. The lower second position 72Lb is the position in the surface connected to the lower flange surface 33L that coincides with the second representative position 74b of the second supported portion 35b in the horizontal direction. The lower target position 71L is the position in the lower flange surface 33L where a vertical displacement Dz is desired when transitioning from the open state to the fastened state.The lower object midpoint position 75L is the midpoint of the transverse direction Dx in the lower flange surface 33L, perpendicular to the axial direction Dy in the horizontal direction, and the position of the axial direction Dy coincides with the lower object position 71L. The upper first position 72Ua is the position in the horizontal direction of the first representative position 74a of the first supported portion 35a in the surface connected to the upper flange surface 33U. The upper second position 72Ub is the position in the horizontal direction of the second representative position 74b of the second supported portion 35b in the surface connected to the upper flange surface 33U. The upper object position 71U is the position in the horizontal direction of the lower object position 71L in the upper flange surface 33U. The upper object midpoint position 75U is the midpoint of the transverse direction Dx in the upper flange surface 33U, and the position of the axial direction Dy coincides with the lower object position 71L. In the displacement calculation step S5, the difference between the position of the lower object position 71L in the vertical direction Dz shown by the effective three-dimensional coordinate data after the coordinate change step S3 and the position of the object contact position 73 in the vertical direction Dz is set as the displacement of the lower object position 71L in the vertical direction Dz. The difference between the position of the upper object position 71U in the vertical direction Dz shown by the effective three-dimensional coordinate data after the coordinate change step S3 and the position of the object contact position 73 in the vertical direction Dz is set as the displacement of the upper object position 71U in the vertical direction Dz.

[0214] In this scheme, the computational load for determining the displacement can be reduced in the same way as in the first scheme by having the computer execute the program.

[0215] (17) In the procedure for estimating the flange displacement of rotating machinery in the seventeenth scheme,

[0216] In the flange displacement estimation procedure 58p of the sixteenth embodiment of the rotating machinery, the lower object position 71L is the position where the stationary part is arranged in the axial direction Dy, and is the position of the inner edge in the lower flange surface 33L.

[0217] (18) In the procedure for estimating the flange displacement of rotating machinery in the eighteenth scheme,

[0218] In the flange displacement estimation procedure 58p of the rotating machinery in the sixteenth or seventeenth scheme, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at the following locations are received: multiple lower midpoint positions 75Lx, which are the midpoints on the transverse Dx of the lower flange surface 33L, and their positions on the axial direction Dy are all different; and multiple upper midpoint positions 75Ux, which are the midpoints on the transverse Dx of the upper flange surface 33U, and their positions on the axial direction Dy are all different. In the effective coordinate mastering step S2, the effective three-dimensional coordinate data at the lower object midpoint position 75L is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions 75Lx, and the effective three-dimensional coordinate data at the upper object midpoint position 75U is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions 75Ux.

[0219] In this solution, by having the computer execute the program, similar to the sixth solution, even if the measured three-dimensional coordinate data of the lower object midpoint position 75L and the upper object midpoint position 75U are not accepted in the measured coordinate acceptance process S1, the valid three-dimensional coordinate data of these positions can still be obtained.

[0220] (19) In the procedure for estimating the flange displacement of rotating machinery in the nineteenth scheme,

[0221] In the flange displacement estimation procedure 58p of the eighteenth scheme of the rotating machinery, in the effective coordinate mastering process S2, the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75L of the multiple lower objects, and the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75U of the multiple upper objects.

[0222] In this scheme, by having the computer execute the program, similar to the ninth scheme, even if the measured three-dimensional coordinate data at the lower first position 72La, the lower second position 72Lb, the upper first position 72Ua, and the upper second position 72Ub are not accepted in the measured coordinate acceptance process S1, the valid three-dimensional coordinate data at these positions can still be obtained.

[0223] The flange displacement estimation device of the rotating machinery described in the above embodiments is as follows, for example.

[0224] (20) The flange displacement estimation device of the twentieth scheme is applied to the following rotating machinery.

[0225] The rotating machinery includes: a rotor 15, capable of rotating about an axis Ar extending in a horizontal direction; a housing 30 covering the outer periphery of the rotor 15; stationary parts disposed within and assembled into the housing 30; and a bracket 11 supporting the housing 30 from below. The housing 30 has: an upper half-housing 30U; a lower half-housing 30L; and a plurality of bolts 39 fastening the upper half-housing 30U and the lower half-housing 30L. The upper half-housing 30U has an upper flange 32U with an upper flange surface 33U facing downwards. The lower half-housing 30L has: a lower flange 32L with a lower flange surface 33L facing upwards and opposing the upper flange surface 33U in the vertical direction Dz; and a first supported portion 35a and a second supported portion 35b connected to the lower flange 32L, supported from below by the bracket 11, and separated from each other in the axial direction Dy extending from the axis Ar. Bolt holes 34 are formed in the upper flange 32U and the lower flange 32L, which are through in the vertical direction Dz and can be inserted into the plurality of bolts 39 respectively.

[0226] The flange displacement estimation device 50 for the rotating machinery described above includes: a measured coordinate receiving unit 61, which receives measured three-dimensional coordinate data at multiple positions on the upper flange surface 33U and multiple positions on the lower flange surface 33L in an open state, wherein the open state refers to the state in which the upper half-shell 30U and the lower half-shell 30L are not fastened by the multiple bolts 39 after the rotating machinery has been disassembled; an effective coordinate grasping unit 62, which uses the measured three-dimensional coordinate data at multiple positions on the lower flange surface 33L to grasp the effective three-dimensional coordinate data at the lower first position 72La, lower second position 72Lb, lower object position 71L, and lower object midpoint position 75L, and uses the measured three-dimensional coordinate data at multiple positions on the upper flange surface 33U to grasp the effective three-dimensional coordinate data at the upper first position 72Ua, upper second position 72Ub, upper object position 71U, and upper object midpoint position 75U; and a coordinate changing unit 63, which changes the effective three-dimensional coordinates grasped by the effective coordinate grasping unit 62. The data ensures that the effective three-dimensional coordinate data of the lower first position 72La held by the effective coordinate holding unit 62 are consistent with the effective three-dimensional coordinate data of the upper first position 72Ua, and that the effective three-dimensional coordinate data of the lower second position 72Lb held by the effective coordinate holding unit 62 are consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; the contact position estimation unit 64 uses the effective three-dimensional coordinate data of the lower object midpoint position 75L and the upper object midpoint position 75U changed by the coordinate changing unit 63 to calculate the effective three-dimensional coordinate data of the object contact position 73, which is the midpoint of the lower object midpoint position 75L and the upper object midpoint position 75U in the vertical direction Dz; and the displacement calculation unit 65 calculates the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz when changing from the open state to the tight state, where the tight state refers to the state in which the upper half shell 30U and the lower half shell 30L are fastened by the plurality of bolts 39. The lower first position 72La is a position in the surface connected to the lower flange surface 33L that coincides with the first representative position 74a of the first supported portion 35a in the horizontal direction. The lower second position 72Lb is a position in the surface connected to the lower flange surface 33L that coincides with the second representative position 74b of the second supported portion 35b in the horizontal direction. The lower object position 71L is a position in the lower flange surface 33L where a vertical displacement Dz is desired when transitioning from the open state to the fastened state. The lower object midpoint position 75L is a position in the lower flange surface 33L that is the midpoint of a transverse direction Dx perpendicular to the axial direction Dy in the horizontal direction, and the position of the axial direction Dy coincides with the lower object position 71L.The upper first position 72Ua is a position in the surface connected to the upper flange surface 33U that coincides with the first representative position 74a of the first supported portion 35a in the horizontal direction. The upper second position 72Ub is a position in the surface connected to the upper flange surface 33U that coincides with the second representative position 74b of the second supported portion 35b in the horizontal direction. The upper object position 71U is a position in the upper flange surface 33U that coincides with the lower object position 71L in the horizontal direction. The upper object midpoint position 75U is the midpoint on the transverse direction Dx in the upper flange surface 33U, and is a position in the axial direction Dy that coincides with the lower object position 71L. The displacement calculation unit 65 sets the difference between the position in the vertical direction Dz shown by the effective three-dimensional coordinate data of the lower object position 71L changed by the coordinate change unit 63 and the position in the vertical direction Dz shown by the effective three-dimensional coordinate data of the object contact position 73 as the displacement amount in the vertical direction Dz of the lower object position 71L, and sets the difference between the position in the vertical direction Dz shown by the effective three-dimensional coordinate data of the upper object position 71U changed by the coordinate change unit 63 and the position in the vertical direction Dz shown by the effective three-dimensional coordinate data of the object contact position 73 as the displacement amount in the vertical direction Dz of the upper object position 71U.

[0227] In this scheme, the computational load for determining the displacement can be reduced in the same way as in the first scheme.

[0228] (21) In the flange displacement estimation device of the rotating machinery in the twenty-first scheme,

[0229] In the flange displacement estimation device 50 of the rotating machinery in the twentieth embodiment, the lower object position 71L is the position where the stationary part is arranged in the axial direction Dy, and is the position of the inner edge in the lower flange surface 33L.

[0230] (22) In the flange displacement estimation device of the rotating machinery in the twenty-second scheme,

[0231] In the flange displacement estimation device 50 of the rotating machinery in the twentieth or twenty-first embodiment, the measured coordinate receiving unit 61 receives measured three-dimensional coordinate data at the following locations: multiple lower midpoint positions 75Lx, which are the midpoints on the transverse Dx of the lower flange surface 33L, and their positions on the axial direction Dy are all different; and multiple upper midpoint positions 75Ux, which are the midpoints on the transverse Dx of the upper flange surface 33U, and their positions on the axial direction Dy are all different. The effective coordinate grasping unit 62 calculates the effective three-dimensional coordinate data at the lower object midpoint position 75L based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions 75Lx, and calculates the effective three-dimensional coordinate data at the upper object midpoint position 75U based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions 75Ux.

[0232] In this scheme, similar to the sixth scheme, even if the measured three-dimensional coordinate data of the lower object midpoint 75L and the upper object midpoint 75U are not accepted by the measured coordinate receiving department 61, the valid three-dimensional coordinate data of these positions can still be obtained.

[0233] (23) In the flange displacement estimation device of the rotating machinery in the twenty-third scheme,

[0234] In the flange displacement estimation device 50 of the rotating machinery in the twenty-second scheme, the effective coordinate grasping unit 62 calculates the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75L of the plurality of lower objects, and calculates the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions 75U of the plurality of upper objects.

[0235] In this scheme, similar to the ninth scheme, even if the measured three-dimensional coordinate data of the lower first position 72La, the lower second position 72Lb, the upper first position 72Ua, and the upper second position 72Ub are not received by the measured coordinate receiving department 61, the valid three-dimensional coordinate data of these positions can still be obtained.

[0236] Industrial availability

[0237] In one aspect of this disclosure, the computational load is reduced when estimating the displacement of the flange surfaces of the upper and lower shells, thereby shortening the preparation period for estimating the flange surfaces and reducing the estimation cost.

[0238] Explanation of reference numerals in the attached figures

[0239] 10: Steam turbine (rotating machinery);

[0240] 11: Bracket;

[0241] 12a: First bearing assembly;

[0242] 12b: Second bearing assembly;

[0243] 13a: First shaft sealing device (stationary part);

[0244] 13b: Second shaft sealing device (stationary part);

[0245] 15: Rotor;

[0246] 16: Rotor shaft;

[0247] 17: Moving leaf row;

[0248] 20: Diaphragm (stationary part);

[0249] 20L: Lower septum;

[0250] 20U: Upper septum;

[0251] 22: Quiet Leaf;

[0252] 23: Inner ring of the diaphragm;

[0253] 24: Diaphragm outer ring;

[0254] 25: Sealing device;

[0255] 30: Shell;

[0256] 30L: Lower half of the shell;

[0257] 30U: Upper shell;

[0258] 31L: Lower half of the shell body;

[0259] 31U: Upper shell main body;

[0260] 32L: Lower flange;

[0261] 32U: Upper flange;

[0262] 33L: Lower flange surface;

[0263] 33U: Upper flange surface;

[0264] 34: Bolt hole;

[0265] 35a: First supported part;

[0266] 35ap: Upper surface;

[0267] 35b: Second supported part;

[0268] 35bp: Top surface;

[0269] 36: Storage section for stationary parts;

[0270] 39: Bolt;

[0271] 50: Flange displacement estimation device;

[0272] 51: Manual input device;

[0273] 52: Display device;

[0274] 53: Input / output interface;

[0275] 54: Device interface;

[0276] 55: Communication interface;

[0277] 56: Storage / reproduction device;

[0278] 57: Memory;

[0279] 58: Auxiliary storage device;

[0280] 58d: Baseline 3D shape data;

[0281] 58p: Flange displacement estimation procedure;

[0282] 60: CPU;

[0283] 61: Actual Coordinate Measurement Acceptance Department;

[0284] 62: Effective coordinate control section;

[0285] 63: Coordinate Change Section;

[0286] 64: Contact position estimation part;

[0287] 65: Displacement calculation unit;

[0288] 69: Three-dimensional shape measuring device;

[0289] 71: Reference position;

[0290] 71L: Lower object position;

[0291] 71U: Upper object position;

[0292] 72La: First position below;

[0293] 72Ua: First position;

[0294] 72Lb: Second position below;

[0295] 72Ub: Second position above;

[0296] 73: Object contact position;

[0297] 74a: First representative position;

[0298] 74b: Second representative position;

[0299] 75L: Midpoint position of the lower object;

[0300] 75U: Midpoint position of the upper object;

[0301] 75Lx: Lower midpoint position;

[0302] 75Ux: Upper midpoint position;

[0303] 76: Virtual line;

[0304] 76L: Lower virtual line;

[0305] 76U: Virtual line;

[0306] 77La: First virtual line below;

[0307] 77Ua: First virtual line;

[0308] 77Lb: Second virtual line below;

[0309] 77Ub: Second virtual line;

[0310] 79: Refer to the measurement area;

[0311] 80: The flange surface shown in the baseline three-dimensional shape data;

[0312] 81: The reference position shown by the baseline three-dimensional shape data;

[0313] 82: The surface inclined relative to the flange surface as shown in the reference three-dimensional shape data;

[0314] 83: Three-dimensional block;

[0315] 85: dot;

[0316] 86, 86a, 86b: Polygons (polygonal planes);

[0317] 87: Representative point;

[0318] Ar: axis;

[0319] Dc: Peripheral direction;

[0320] Dr: Radial;

[0321] Dri: Radial inner side;

[0322] Dro: Radial outer side;

[0323] Dx: Horizontal direction;

[0324] Dy: Axis direction;

[0325] Dz: Up and down direction;

[0326] Dw: Flange width direction.

Claims

1. A method for estimating the flange displacement of rotating machinery, said rotating machinery comprising: The rotor can rotate about an axis that extends horizontally. A housing that covers the outer periphery of the rotor; A stationary part, disposed within the housing, and assembled into the housing; as well as The bracket supports the housing from below. The housing has: an upper half-shell on the upper side; The lower half of the housing on the lower side; and multiple bolts, fastening the upper half of the housing and the lower half of the housing together. The upper shell has an upper flange with an upper flange surface facing downwards. The lower housing has: a lower flange having an upward-facing surface that faces the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. The upper flange and the lower flange are provided with bolt holes that extend in the vertical direction and allow the plurality of bolts to be inserted. In the method for estimating the flange displacement of the rotating machinery, the following steps are performed: The measured coordinate acceptance process accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface and at multiple locations on the lower flange surface in an open state. The open state refers to the state in which the upper half shell and the lower half shell are not fastened by the multiple bolts after the rotating machinery has been disassembled. The effective coordinate mastering process uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to master the effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to master the effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate change process changes the effective three-dimensional coordinate data obtained in the effective coordinate mastering process, so that the effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate mastering process is consistent with the effective three-dimensional coordinate data of the upper first position, and the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate mastering process is consistent with the effective three-dimensional coordinate data of the upper second position. The contact position estimation process uses the valid three-dimensional coordinate data of the midpoint positions of the lower and upper objects, which have been modified through the coordinate change process, to calculate the valid three-dimensional coordinate data of the object contact position. The object contact position is the midpoint between the midpoint positions of the lower and upper objects in the vertical direction. The displacement calculation process determines the vertical displacement of the upper and lower object positions when the open state transitions to the tightened state. The tightened state refers to the state in which the upper and lower shells are secured together by the plurality of bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement is desired when transitioning from the open state to the fastened state. The midpoint of the lower object is the midpoint of the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the position of the lower object. The first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the upper flange surface. The second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the upper flange surface. The upper object position is the same horizontally as the lower object position on the upper flange surface. The midpoint of the upper object is the midpoint of the transverse direction on the upper flange surface, and its position in the axial direction coincides with the position of the lower object. The first representative position is the position where the maximum load is applied in the first supported part. The second representative position is the position where the maximum load is applied in the second supported part. In the displacement calculation process. The difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the lower object position. The difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the upper object position.

2. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, The lower object position is the position where the stationary part is positioned in the axial direction, and is the position of the inner edge in the lower flange surface.

3. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the measured coordinate acceptance process, the measured three-dimensional coordinate data of the midpoint positions of the lower object and the upper object are accepted. In the effective coordinate acquisition process, the measured three-dimensional coordinate data at the midpoint of the lower object is retained as the effective three-dimensional coordinate data at the midpoint of the lower object, and the measured three-dimensional coordinate data at the midpoint of the upper object obtained in the measured coordinate acceptance process is retained as the effective three-dimensional coordinate data at the midpoint of the upper object.

4. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data from multiple locations on a virtual line extending along the flange width direction from the midpoint of the lower object are accepted, as are measured three-dimensional coordinate data from multiple locations on a virtual line extending along the flange width direction from the midpoint of the upper object. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object's midpoint position is obtained based on the measured three-dimensional coordinate data of multiple positions on the lower midpoint virtual line, and the effective three-dimensional coordinate data of the upper object's midpoint position is obtained based on the measured three-dimensional coordinate data of multiple positions on the upper midpoint virtual line.

5. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data at multiple locations within the lower midpoint measurement area (including the midpoint of the lower object) on the lower flange surface are accepted, and measured three-dimensional coordinate data at multiple locations within the upper midpoint measurement area (including the midpoint of the upper object) on the upper flange surface are also accepted. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object midpoint position is obtained by using the measured three-dimensional coordinate data of multiple positions in the lower midpoint measurement area obtained in the measured coordinate acceptance process, and the effective three-dimensional coordinate data of the upper object midpoint position is obtained by using the measured three-dimensional coordinate data of multiple positions in the upper midpoint measurement area obtained in the measured coordinate acceptance process.

6. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data at the following locations are accepted: multiple lower midpoint positions, which are the midpoints in the transverse direction of the lower flange surface, and their positions in the axial direction are all different; and multiple upper midpoint positions, which are the midpoints in the transverse direction of the upper flange surface, and their positions in the axial direction are all different. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object's midpoint position is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions, and the effective three-dimensional coordinate data of the upper object's midpoint position is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions.

7. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 6, wherein, In the measured coordinate acceptance process, the measured three-dimensional coordinate data of the lower first position and the lower second position are accepted. In the effective coordinate acquisition process, the measured three-dimensional coordinate data of the lower first position and the lower second position obtained in the measured coordinate acceptance process are kept as the effective three-dimensional coordinate data of the lower first position and the lower second position.

8. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 6, wherein, In the measured coordinate receiving process, measured three-dimensional coordinate data at multiple locations on the upper surface of the first supported part and measured three-dimensional coordinate data at multiple locations on the upper surface of the second supported part are received. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower first position is obtained based on the measured three-dimensional coordinate data of multiple positions on the upper surface of the first supported part obtained in the measured coordinate acceptance process, and the effective three-dimensional coordinate data of the lower second position is obtained based on the measured three-dimensional coordinate data of multiple positions on the upper surface of the second supported part obtained in the measured coordinate acceptance process.

9. The method for estimating the flange displacement of rotating machinery according to claim 6, wherein, In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower first position and the lower second position are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions of the multiple lower objects, and the effective three-dimensional coordinate data of the upper first position and the upper second position are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions of the multiple upper objects.

10. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 6, wherein, In the measured coordinate acceptance process, the measured three-dimensional coordinate data of the lower object position and the upper object position are accepted. In the effective coordinate acquisition process, the measured three-dimensional coordinate data of the lower object position is kept as is and used as the effective three-dimensional coordinate data of the lower object position. Similarly, the measured three-dimensional coordinate data of the upper object position obtained in the measured coordinate acceptance process is kept as is and used as the effective three-dimensional coordinate data of the upper object position.

11. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 6, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data from multiple locations on a lower virtual line extending along the flange width direction through the lower object location are accepted, as are measured three-dimensional coordinate data from multiple locations on an upper virtual line extending along the flange width direction through the upper object location. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object position is obtained based on the measured three-dimensional coordinate data of multiple positions on the lower virtual line, and the effective three-dimensional coordinate data of the upper object position is obtained based on the measured three-dimensional coordinate data of multiple positions on the upper virtual line.

12. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 6, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data at multiple locations within the lower measurement area that includes the lower object position on the lower flange surface are accepted, and measured three-dimensional coordinate data at multiple locations within the upper measurement area that includes the upper object position on the upper flange surface are also accepted. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object position is obtained by using the measured three-dimensional coordinate data of multiple positions in the lower measurement area obtained in the measured coordinate acceptance process, and the effective three-dimensional coordinate data of the upper object position is obtained by using the measured three-dimensional coordinate data of multiple positions in the upper measurement area obtained in the measured coordinate acceptance process.

13. The method for estimating the flange displacement of rotating machinery according to claim 1 or 2, wherein, In the measured coordinate processing step, measured three-dimensional coordinate data from multiple locations covering the entire lower flange surface and measured three-dimensional coordinate data from multiple locations covering the entire upper flange surface are accepted. In the process of obtaining the effective coordinates The shape data of the lower flange surface, representing the three-dimensional shape of the entire lower flange surface, is obtained using measured three-dimensional coordinate data from multiple locations covering the entire lower flange surface, which are processed in the measured coordinate processing step. Similarly, the shape data of the upper flange surface, representing the three-dimensional shape of the entire upper flange surface, is obtained using measured three-dimensional coordinate data from multiple locations covering the entire upper flange surface, which are processed in the measured coordinate processing step. The effective three-dimensional coordinate data of the midpoint of the lower object is obtained using the shape data of the lower flange surface, and the effective three-dimensional coordinate data of the midpoint of the upper object is obtained using the shape data of the upper flange surface.

14. The method for estimating the flange displacement of rotating machinery according to claim 13, wherein, In the effective coordinate acquisition process, the shape data of the lower flange surface is used to obtain the effective three-dimensional coordinate data of the lower first position and the lower second position, and the shape data of the upper flange surface is used to obtain the effective three-dimensional coordinate data of the upper first position and the upper second position.

15. The method for estimating the flange displacement of rotating machinery according to claim 13, wherein, In the effective coordinate acquisition process, the shape data of the lower flange surface is used to obtain the effective three-dimensional coordinate data of the lower object position, and the shape data of the upper flange surface is used to obtain the effective three-dimensional coordinate data of the upper object position.

16. A storage medium storing a program for estimating the flange displacement of rotating machinery, said rotating machinery comprising: The rotor can rotate about an axis that extends horizontally. A housing that covers the outer periphery of the rotor; A stationary part, disposed within the housing, and assembled into the housing; as well as The bracket supports the housing from below. The housing has: an upper half-shell on the upper side; The lower half of the housing on the lower side; and multiple bolts, fastening the upper half of the housing and the lower half of the housing together. The upper shell has an upper flange with an upper flange surface facing downwards. The lower housing has: a lower flange having an upward-facing surface that faces the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. The upper flange and the lower flange are provided with bolt holes that extend in the vertical direction and allow the plurality of bolts to be inserted. The flange displacement estimation program for the rotating machinery causes the computer to perform the following steps: The measured coordinate acceptance process accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface and at multiple locations on the lower flange surface in an open state. The open state refers to the state in which the upper half shell and the lower half shell are not fastened by the multiple bolts after the rotating machinery has been disassembled. The effective coordinate mastering process uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to master the effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to master the effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate change process changes the effective three-dimensional coordinate data obtained in the effective coordinate mastering process, so that the effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate mastering process is consistent with the effective three-dimensional coordinate data of the upper first position, and the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate mastering process is consistent with the effective three-dimensional coordinate data of the upper second position. The contact position estimation process uses the valid three-dimensional coordinate data of the midpoint positions of the lower and upper objects, which have been modified through the coordinate change process, to calculate the valid three-dimensional coordinate data of the object contact position. The object contact position is the midpoint between the midpoint positions of the lower and upper objects in the vertical direction. The displacement calculation process determines the vertical displacement of the upper and lower object positions when the open state transitions to the tightened state. The tightened state refers to the state in which the upper and lower shells are secured together by the plurality of bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement is desired when transitioning from the open state to the fastened state. The midpoint of the lower object is the midpoint of the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the position of the lower object. The first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the upper flange surface. The second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the upper flange surface. The upper object position is the same horizontally as the lower object position on the upper flange surface. The midpoint of the upper object is the midpoint of the transverse direction on the upper flange surface, and its position in the axial direction coincides with the position of the lower object. The first representative position is the position where the maximum load is applied in the first supported part. The second representative position is the position where the maximum load is applied in the second supported part. In the displacement calculation process. The difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the lower object position. The difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown in the effective three-dimensional coordinate data of the object contact position is set as the vertical displacement of the upper object position.

17. The storage medium according to claim 16, which stores a program for estimating the flange displacement of rotating machinery, wherein, The lower object position is the position where the stationary part is positioned in the axial direction, and is the position of the inner edge in the lower flange surface.

18. The storage medium according to claim 16 or 17 storing a program for estimating the flange displacement of rotating machinery, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data at the following locations are accepted: multiple lower midpoint positions, which are the midpoints in the transverse direction of the lower flange surface, and their positions in the axial direction are all different; and multiple upper midpoint positions, which are the midpoints in the transverse direction of the upper flange surface, and their positions in the axial direction are all different. In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower object's midpoint position is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions, and the effective three-dimensional coordinate data of the upper object's midpoint position is obtained based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions.

19. The storage medium according to claim 18, which stores a program for estimating the flange displacement of rotating machinery, wherein, In the effective coordinate acquisition process, the effective three-dimensional coordinate data of the lower first position and the lower second position are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions of the multiple lower objects, and the effective three-dimensional coordinate data of the upper first position and the upper second position are obtained based on the changing trend of the effective three-dimensional coordinate data of the midpoint positions of the multiple upper objects.

20. A device for estimating the flange displacement of rotating machinery, said rotating machinery comprising: The rotor can rotate about an axis that extends horizontally. A housing that covers the outer periphery of the rotor; A stationary part, disposed within the housing, and assembled into the housing; as well as The bracket supports the housing from below. The housing has: an upper half-shell on the upper side; The lower half of the housing on the lower side; and multiple bolts, fastening the upper half of the housing and the lower half of the housing together. The upper shell has an upper flange with an upper flange surface facing downwards. The lower housing has: a lower flange having an upward-facing surface that faces the upper flange in the vertical direction; and a first supported portion and a second supported portion connected to the lower flange, supported from below by the bracket, and separated from each other in the axial direction extending from the axis. The upper flange and the lower flange are provided with bolt holes that extend in the vertical direction and allow the plurality of bolts to be inserted. The flange displacement estimation device for the rotating machinery includes: The measured coordinate receiving department receives measured three-dimensional coordinate data at multiple locations on the upper flange surface and at multiple locations on the lower flange surface in an open state. The open state refers to the state in which the upper half shell and the lower half shell are not fastened by the multiple bolts after the rotating machinery has been disassembled. The effective coordinate grasping unit uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to grasp the effective three-dimensional coordinate data at the lower first position, lower second position, lower object position, and lower object midpoint position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to grasp the effective three-dimensional coordinate data at the upper first position, upper second position, upper object position, and upper object midpoint position. The coordinate changing unit changes the effective three-dimensional coordinate data held by the effective coordinate grasping unit, so that the effective three-dimensional coordinate data of the lower first position held by the effective coordinate grasping unit is consistent with the effective three-dimensional coordinate data of the upper first position, and so that the effective three-dimensional coordinate data of the lower second position held by the effective coordinate grasping unit is consistent with the effective three-dimensional coordinate data of the upper second position. The contact position estimation unit uses the effective three-dimensional coordinate data of the midpoint position of the lower object and the midpoint position of the upper object, which have been changed by the coordinate change unit, to calculate the effective three-dimensional coordinate data of the object contact position, where the object contact position is the midpoint in the vertical direction between the midpoint position of the lower object and the midpoint position of the upper object. as well as The displacement calculation unit calculates the vertical displacement of the upper and lower object positions when the open state changes to the tightened state. The tightened state refers to the state in which the upper and lower shells are fastened together by the plurality of bolts. The lower first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the lower flange surface. The lower second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the lower flange surface. The lower object position is the position on the lower flange surface where the vertical displacement is desired when transitioning from the open state to the fastened state. The midpoint of the lower object is the midpoint of the lower flange surface in the horizontal direction perpendicular to the axial direction, and it is the position where the axial direction coincides with the position of the lower object. The first position is the position in the horizontal direction that coincides with the first representative position of the first supported part in the surface connected to the upper flange surface. The second position is the position in the horizontal direction that coincides with the second representative position of the second supported part in the surface connected to the upper flange surface. The upper object position is the same horizontally as the lower object position on the upper flange surface. The midpoint of the upper object is the midpoint of the transverse direction on the upper flange surface, and its position in the axial direction coincides with the position of the lower object. The first representative position is the position where the maximum load is applied in the first supported part. The second representative position is the position where the maximum load is applied in the second supported part. The displacement calculation unit sets the difference between the vertical position shown in the effective three-dimensional coordinate data of the lower object position changed by the coordinate change unit and the vertical position shown in the effective three-dimensional coordinate data of the object contact position as the vertical displacement of the lower object position, and sets the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position changed by the coordinate change unit and the vertical position shown in the effective three-dimensional coordinate data of the object contact position as the vertical displacement of the upper object position.

21. The flange displacement estimation device for rotating machinery according to claim 20, wherein, The lower object position is the position where the stationary part is positioned in the axial direction, and is the position of the inner edge in the lower flange surface.

22. The flange displacement estimation device for rotating machinery according to claim 20 or 21, wherein, The measured coordinate receiving unit receives measured three-dimensional coordinate data at the following locations: multiple lower midpoint positions, which are the midpoints in the transverse direction of the lower flange surface, and whose positions in the axial direction are all different; and multiple upper midpoint positions, which are the midpoints in the transverse direction of the upper flange surface, and whose positions in the axial direction are all different. The effective coordinate acquisition unit calculates the effective three-dimensional coordinate data at the midpoint of the lower object based on the changing trend of the measured three-dimensional coordinate data at the multiple lower midpoint positions, and calculates the effective three-dimensional coordinate data at the midpoint of the upper object based on the changing trend of the measured three-dimensional coordinate data at the multiple upper midpoint positions.

23. The flange displacement estimation device for rotating machinery according to claim 22, wherein, The effective coordinate acquisition unit calculates the effective three-dimensional coordinate data at the first lower position and the second lower position based on the changing trend of the effective three-dimensional coordinate data at the midpoint positions of the multiple lower objects, and calculates the effective three-dimensional coordinate data at the first upper position and the second upper position based on the changing trend of the effective three-dimensional coordinate data at the midpoint positions of the multiple upper objects.

Images