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

Abstract

In the flange displacement amount estimation method of the present application, a lower first position of a first supported portion in a surface connected to a lower flange surface and an effective three-dimensional coordinate data at an upper first position in a horizontal direction in a surface connected to an upper flange surface that coincides with the lower first position are grasped. The effective three-dimensional coordinate data grasped in the effective coordinate grasping step is changed so that the effective three-dimensional coordinate data of the lower first position coincides with the effective three-dimensional coordinate data of the upper first position. A displacement amount in the up-down direction from the upper object position and the lower object position when the open state becomes the fastened state is calculated based on a difference between a position in the up-down direction shown by the effective three-dimensional coordinate data at an upper object position in the upper flange surface after the coordinate change and a position in the up-down direction shown by the effective three-dimensional coordinate data at a lower object position in the lower flange surface after the coordinate change.

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. 2022-027443, 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, once the lower and upper shells are in the open state after operation, they are already tightly deformed from the time of manufacture. At the end of the inspection, the multiple components are assembled. This assembly process includes fastening the upper shell to the lower shell using multiple bolts to create 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 deform further.

[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, thus altering the shape of the lower and upper housing halves, the radial spacing between the stationary parts assembled in the housing and the rotor may sometimes change, deviating 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, the deformation of a specified portion in the lower and upper shells is estimated based on the difference between the finite element model representing the open state and the finite element model representing the secured state. 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 half shell and the upper flange surface of the upper half 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 suppressing the computational load when estimating the displacement of the flange surfaces of the upper and lower shells, and to suppress 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 includes: 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, penetrating in the vertical direction for the plurality of bolts to be inserted. The upper surfaces of the first and second supported portions are offset in the vertical direction relative to the lower flange surface.

[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, and lower object position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to... The effective three-dimensional coordinate data of the upper first position, upper second position, and upper object position are obtained. The lower first position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position of the maximum load applied in the first supported part. The lower second position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the second representative position of the maximum load applied in the second supported part. The lower object position is the position in the lower flange surface where the upper and lower halves of the housing are to be fastened from the open state by the plurality of bolts. The system defines the vertical displacement of the upper and lower objects in the state, where the first upper position is the position in the horizontal direction of the virtual surface connected to the upper flange surface that coincides with the first representative position, the second upper position is the position in the horizontal direction of the virtual surface connected to the upper flange surface that coincides with the second representative position, and the upper object position is the position in the horizontal direction of the upper flange surface that coincides with the lower object position; a coordinate change process modifies the effective three-dimensional coordinate data obtained in the effective coordinate mastering process to make the effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate mastering process consistent with the effective three-dimensional coordinate data of the upper first position, and to make the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate mastering process consistent with the effective three-dimensional coordinate data of the upper second position; and a displacement calculation process calculates the vertical displacement of the upper and lower object positions when changing from the open state to the fastened state based on the difference between the vertical position shown by the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown by the effective three-dimensional coordinate data of the lower object position after the coordinate change process.The effective coordinate acquisition process includes: a primary processing step, using measured three-dimensional coordinate data from multiple locations on the lower flange surface to acquire effective three-dimensional coordinate data for the lower edge first position, lower edge second position, and lower object position; and using measured three-dimensional coordinate data from multiple locations on the upper flange surface to acquire effective three-dimensional coordinate data for the upper edge first position, upper edge second position, and upper object position. The lower edge first position represents the position on the lower flange surface relative to the boundary with the first supported portion; the lower edge second position represents the position on the lower flange surface relative to the boundary with the second supported portion; and the upper edge first position is located on the upper flange surface... The upper edge second position is a position in the horizontal direction of the upper flange surface that coincides with the lower edge second position; and a secondary processing step, which estimates the effective three-dimensional coordinate data of the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the lower flange surface including the lower edge first position and the lower edge second position, and estimates the effective three-dimensional coordinate data of the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the upper flange surface including the upper edge first position and the upper edge second position.

[0019] In this scheme, the vertical displacements of the upper and lower object positions when the shell changes from an open to a fixed state are calculated based on the difference between the vertical displacement of the upper object position (where the displacement is to be obtained in the upper flange surface) and the vertical displacement of the lower object position (where the displacement is to be obtained in the lower flange surface). Therefore, this scheme can determine the vertical displacements of the upper and lower object positions even without using finite element models of the lower and upper shells to simulate their deformation. Consequently, this scheme reduces the computational load when calculating the displacements.

[0020] In this scheme, when calculating the vertical displacement of the upper and lower object positions, the following four points in the open state are required.

[0021] a) The lower first position, located in the horizontal direction on the surface connected to the lower flange surface, coincides with the first representative position in the first supported portion where the maximum load is applied.

[0022] b) The lower second position, located in the horizontal direction on the surface connected to the lower flange surface, coincides with the second representative position in the second supported portion where the maximum load is applied.

[0023] c) The first position in the horizontal direction of the surface connected to the upper flange surface, which coincides with the first representative position.

[0024] d) The upper second position, located in the horizontal direction of the surface connected to the upper flange surface, is consistent with the second representative position.

[0025] In this scheme, the effective three-dimensional coordinate data of the above four points are estimated by performing a first processing step and a second processing step. Therefore, even if it is assumed that the upper surface of the first supported part and the upper surface of the second supported part are offset in the vertical direction relative to the lower flange surface, and the measured three-dimensional coordinate data of the lower first position, lower second position, upper first position, and upper second position cannot be obtained, the vertical displacement Dz of the upper object position and the lower object position can still be calculated.

[0026] As one approach to achieving the stated objective, a flange displacement estimation procedure for rotating machinery is applied to the following rotating machinery.

[0027] The rotating machinery includes: 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, penetrating in the vertical direction for the plurality of bolts to be inserted. The upper surfaces of the first and second supported portions are offset in the vertical direction relative to the lower flange surface.

[0028] The flange displacement estimation program for rotating machinery causes the computer to execute the following steps:

[0029] 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, and lower object position, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to... The effective three-dimensional coordinate data of the upper first position, upper second position, and upper object position are obtained. The lower first position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position of the maximum load applied in the first supported part. The lower second position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the second representative position of the maximum load applied in the second supported part. The lower object position is the position in the lower flange surface where the upper and lower halves of the housing are to be fastened from the open state by the plurality of bolts. The system defines the vertical displacement of the upper and lower objects in the state, where the first upper position is the position in the horizontal direction of the virtual surface connected to the upper flange surface that coincides with the first representative position, the second upper position is the position in the horizontal direction of the virtual surface connected to the upper flange surface that coincides with the second representative position, and the upper object position is the position in the horizontal direction of the upper flange surface that coincides with the lower object position; a coordinate change process modifies the effective three-dimensional coordinate data obtained in the effective coordinate mastering process to make the effective three-dimensional coordinate data of the lower first position obtained in the effective coordinate mastering process consistent with the effective three-dimensional coordinate data of the upper first position, and to make the effective three-dimensional coordinate data of the lower second position obtained in the effective coordinate mastering process consistent with the effective three-dimensional coordinate data of the upper second position; and a displacement calculation process calculates the vertical displacement of the upper and lower object positions when changing from the open state to the fastened state based on the difference between the vertical position shown by the effective three-dimensional coordinate data of the upper object position after the coordinate change process and the vertical position shown by the effective three-dimensional coordinate data of the lower object position after the coordinate change process.The effective coordinate acquisition process includes the following steps: a primary processing step, using the measured three-dimensional coordinate data at multiple locations on the lower flange surface to acquire effective three-dimensional coordinate data at the lower edge first position, lower edge second position, and lower object position; and using the measured three-dimensional coordinate data at multiple locations on the upper flange surface to acquire effective three-dimensional coordinate data at the upper edge first position, upper edge second position, and upper object position. The lower edge first position represents the position on the lower flange surface that is adjacent to the boundary of the first supported portion; the lower edge second position represents the position on the lower flange surface that is adjacent to the boundary of the second supported portion; and the upper edge first position is located on the upper flange surface... The upper edge second position is the position in the horizontal direction of the upper flange surface that coincides with the lower edge first position, and the upper edge second position is the position in the horizontal direction of the upper flange surface that coincides with the lower edge second position; and a secondary processing step, which estimates the effective three-dimensional coordinate data of the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the lower flange surface including the lower edge first position and the lower edge second position, and estimates the effective three-dimensional coordinate data of the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the upper flange surface including the upper edge first position and the upper edge second position.

[0030] In this solution, by having a computer execute the program, the computational load when calculating the displacement can be suppressed in the same way as in one solution of the flange displacement estimation method. Furthermore, in this solution, by having a computer execute the program, similar to one solution of the flange displacement estimation method, even if it is assumed that the upper surfaces of the first and second supported portions are offset in the vertical direction relative to the lower flange surface, and the measured three-dimensional coordinate data of the lower first position, lower second position, upper first position, and upper second position cannot be obtained, the vertical displacement of the upper and lower object positions can still be calculated.

[0031] As a solution for achieving the aforementioned purpose, a flange displacement device for rotating machinery is applied to the following rotating machinery.

[0032] The rotating machinery includes: 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, penetrating in the vertical direction for the plurality of bolts to be inserted. The upper surfaces of the first and second supported portions are offset in the vertical direction relative to the lower flange surface.

[0033] The flange displacement estimation device for the above rotating machinery includes:

[0034] 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 and the upper and lower shells are not secured with the multiple bolts. 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, and lower object position, and also uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface. According to the method of obtaining effective three-dimensional coordinate data of the upper first position, the upper second position, and the upper object position, the lower first position is the position in the horizontal direction of the virtual surface connected to the lower flange surface that coincides with the first representative position of the maximum load applied in the first supported part. The lower second position is the position in the horizontal direction of the virtual surface connected to the lower flange surface that coincides with the second representative position of the maximum load applied in the second supported part. The lower object position is the position in the lower flange surface where the upper half shell and the lower half shell are to be connected by the plurality of bolts from the open state. The system defines the vertical displacement of the upper and lower object positions when the object is in a tightened state. The upper first position is a position in the virtual surface connected to the upper flange that is horizontally aligned with the first representative position. The upper second position is a position in the virtual surface connected to the upper flange that is horizontally aligned with the second representative position. The upper object position is a position in the upper flange that is horizontally aligned with the lower object position. A coordinate change unit modifies the effective three-dimensional coordinate data held by the effective coordinate control unit to make the effective three-dimensional coordinate data of the lower first position consistent with the effective three-dimensional coordinate data of the upper first position, and to make the effective three-dimensional coordinate data of the lower second position consistent with the effective three-dimensional coordinate data of the upper second position. A displacement calculation unit calculates the vertical displacement of the upper and lower object positions when they change from the open state to the tightened state, based on the difference between the vertical position shown by the effective three-dimensional coordinate data of the upper object position after coordinate change and the vertical position shown by the effective three-dimensional coordinate data of the lower object position after coordinate change.The effective coordinate acquisition unit includes: a primary processing unit that uses measured three-dimensional coordinate data from multiple locations on the lower flange surface L to acquire effective three-dimensional coordinate data for the lower edge first position, the lower edge second position, and the lower object position; and uses measured three-dimensional coordinate data from multiple locations on the upper flange surface to acquire effective three-dimensional coordinate data for the upper edge first position, the upper edge second position, and the upper object position. The lower edge first position represents the position on the lower flange surface that is the boundary with the first supported portion; the lower edge second position represents the position on the lower flange surface that is the boundary with the second supported portion; and the upper edge first position is a horizontal position on the surface connected to the upper flange surface. The upward position is the position that coincides with the lower edge first position, and the upper edge second position is the position in the horizontal direction of the surface connected to the upper flange surface that coincides with the lower edge second position; and the upper object position; and the secondary processing unit, which estimates the effective three-dimensional coordinate data at the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the lower flange surface including the lower edge first position and the lower edge second position, and estimates the effective three-dimensional coordinate data at the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the upper flange surface including the upper edge first position and the upper edge second position.

[0035] In this solution, the computational load when calculating the displacement is suppressed in the same way as in one of the flange displacement estimation methods. Furthermore, in this solution, by having a computer execute the program, similar to one of the flange displacement estimation methods, even if it is assumed that the upper surfaces of the first and second supported portions are offset in the vertical direction relative to the lower flange surface, and the measured three-dimensional coordinate data of the lower first position, lower second position, upper first position, and upper second position cannot be obtained, the vertical displacement of the upper and lower object positions can still be calculated.

[0036] Invention Effects

[0037] In one aspect of this disclosure, the calculated load can be suppressed and the displacement of the flange surfaces of the upper and lower shells can be estimated. Therefore, in one aspect of this disclosure, the preparation period for estimating the flange surfaces can be shortened, and the estimation cost can be reduced. Furthermore, in one aspect of this disclosure, even when the upper surfaces of the first and second supported portions are offset relative to the lower flange surface in the vertical direction, making it impossible to obtain measured three-dimensional coordinate data for the lower first position, lower second position, upper first position, and upper second position, the vertical displacement of the upper and lower object positions can still be calculated. Attached Figure Description

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Figure 4 This is a cross-sectional view of the housing in an open state according to one embodiment of this disclosure.

[0042] Figure 5 This is a cross-sectional view of the housing in a fastened state according to one embodiment of this disclosure.

[0043] Figure 6 This is a functional block diagram of a flange displacement estimation device according to one embodiment of the present disclosure.

[0044] Figure 7 This is a flowchart illustrating a method for estimating flange displacement according to one embodiment of the present disclosure.

[0045] Figure 8 This 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.

[0046] Figure 9 This is an explanatory diagram illustrating the processing details in the coordinate change process of one embodiment of this disclosure.

[0047] Figure 10 This is an explanatory diagram illustrating the processing content in a secondary processing step of one embodiment of this disclosure.

[0048] Figure 11 This is an explanatory diagram illustrating other processing steps in a secondary processing step of one embodiment of this disclosure.

[0049] Figure 12 This is an explanatory diagram showing the position of the measured three-dimensional coordinate data required when performing the first mastering method according to one embodiment of the present disclosure.

[0050] Figure 13 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.

[0051] Figure 14This is an explanatory diagram showing the processing content in a processing step S2a when the second mastering method is executed according to an embodiment of the present disclosure.

[0052] Figure 15 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.

[0053] Figure 16 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.

[0054] Figure 17 This is an explanatory diagram used to illustrate multiple polygon data in one embodiment of the present disclosure.

[0055] Figure 18 This is an explanatory diagram illustrating the extraction of specific polygon data from multiple polygon data in one embodiment of this disclosure.

[0056] Figure 19 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.

[0057] Figure 20 This is an explanatory diagram illustrating a method for determining a reference position in a processing step during the execution of a third mastering method, according to an embodiment of this disclosure.

[0058] Figure 21 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.

[0059] Figure 22 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.

[0060] Figure 23 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.

[0061] Figure 24 This is an explanatory diagram illustrating a method for determining a reference position in a processing step during the execution of the fourth mastering method, according to an embodiment of this disclosure. Detailed Implementation

[0062] 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.

[0063] <Implementation Methods of Rotating Machinery>

[0064] Reference Figures 1-5 The rotating machinery of this embodiment will be described.

[0065] like Figure 1 and Figure 2 As 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.

[0066] Here, the direction in which axis Ar extends is designated as the axial direction Dy, 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 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 offset relative to the lower flange surface 33L in the vertical direction Dz. It should be noted that when the upper flange 32U has portions corresponding to the first supported portion 35a and the second supported portion 35b in the lower flange 32L, the lower surfaces corresponding to the portions of the first supported portion 35a and the second supported portion 35b are offset relative to the upper flange surface 33U in the vertical direction Dz.

[0074] The lower flange 32L and the upper flange 32U have bolt holes 34 that extend in the vertical direction Dz and allow multiple bolts 39 to be inserted. The lower half-shell 30L and the upper half-shell 30U are fastened together by bolts 39 inserted into the bolt holes 34 of the lower flange 32L and the bolt holes 34 of the upper flange 32U.

[0075] 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).

[0076] 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. The result of this deformation is, for example... Figure 4 As shown, in the open state where the upper half-shell 30U is not fastened to the lower half-shell 30L, the vertical position Dz of the lower flange surface 33L and the upper flange surface 33U changes according to the position of the axial direction Dy.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] <Implementation Method of Flange Displacement Estimation Device>

[0082] Reference Figure 6 The flange displacement estimation device of this embodiment will be described.

[0083] 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.

[0084] 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.

[0085] The CPU 60 functionally comprises: a measured coordinate receiving unit 61, an effective coordinate holding unit 62, a coordinate changing unit 63, and a displacement calculation unit 64. The effective coordinate holding unit 62 includes a primary processing unit 62a and a secondary processing unit 62b. Each of these functional units 61 to 64 functions 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 64 will be described later.

[0086] <Implementation Method of Flange Displacement Estimation>

[0087] 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.

[0088] For steam turbine 10, disassembly and assembly are required whenever inspections or other procedures are performed. The point at which the disassembly of steam turbine 10 is completed, 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.

[0089] 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).

[0090] 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 in the horizontal direction.

[0091] When the measured coordinate receiving department 61 receives multiple measured three-dimensional coordinate data, such as Figure 8 As shown, the effective coordinate measuring unit 62 of the flange displacement estimation device 50 uses multiple measured three-dimensional coordinate data to measure the effective three-dimensional coordinate data at multiple lower object positions 71L, lower first position 72La, lower second position 72Lb, multiple upper object positions 71U, upper first position 72Ua, and upper second position 72Ub (effective coordinate measuring process S2). Here, effective three-dimensional coordinate data refers to the three-dimensional coordinate data of points on the surfaces of the lower flange surface 33L and upper flange surface 33U, which include virtual upper surfaces, calculated based on the multiple measured three-dimensional coordinate data received. 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 measuring this effective three-dimensional coordinate data will be explained in detail later.

[0092] Here, the lower first position 72La is the position in the virtual surface connected to the lower flange surface 33L, in the horizontal direction, which coincides with the first representative position 74a of the first supported portion 35a. 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 virtual surface connected to the lower flange surface 33L, in the horizontal direction, which coincides with the second representative position 74b of the second supported portion 35b. The second representative position 74b is the position where the maximum load is applied in the second supported portion 35b. The multiple lower target positions 71L are the 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 in the lower flange surface 33L where the stationary part storage portion 36 is formed in the axial direction Dy, which is the position of the inner edge in the lower flange surface 33L. The first upper position 72Ua is a position in the horizontal direction of the surface connected to the upper flange surface 33U that coincides with the first representative position 74a of the first supported portion 35a. The second upper position 72Ub is a position in the horizontal direction of the surface connected to the upper flange surface 33U that coincides with the second representative position 74b of the second supported portion 35b. The multiple upper target positions 71U are 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 in the upper flange surface 33U where the stationary part storage portion 36 is formed in the axial direction Dy, which is the position of the inner edge of the upper flange surface 33U.

[0093] The horizontal positions of multiple upper object positions 71U are all consistent with any one of the multiple lower object positions 71L. Here, consistency in the horizontal position 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 horizontal direction Dx are also the same. It also means that the coordinate values ​​of the position in the axial direction Dy are substantially the same, and the coordinate values ​​of the position in the horizontal direction Dx are also substantially the same.

[0094] 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 in the lower flange surface 33L where the stationary part storage portion 36 is formed in the axial direction Dy, and the location of the inner edge in the lower flange surface 33L; and the location in the upper flange surface 33U where the stationary part storage portion 36 is formed in the axial direction Dy, and the location of the inner edge in the upper flange surface 33U. Therefore, the lower object position 71L where the vertical displacement in the vertical direction Dz is desired is set to the above-described position, and the upper object position 71U where the vertical displacement in the vertical direction Dz is desired is set to the above-described position.

[0095] 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 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 from the inner edge of the upper flange surface 33U to one-third of the flange width.

[0096] 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 9 As 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.

[0097] Next, the displacement calculation unit 64 of the flange displacement estimation device 50 uses the effective three-dimensional coordinate data after coordinate transformation by the coordinate transformation unit 63 to calculate the displacement of the lower object position 71L in the vertical direction Dz in the lower flange 32L and the displacement of the upper object position 71U in the vertical direction Dz in the upper flange 32U, and outputs these displacements according to external requests (displacement calculation process S4). Specifically, the displacement calculation unit 64 sets half of the difference between the coordinate value ZL of the vertical direction Dz included in the effective three-dimensional coordinate data of the lower object position 71L after coordinate transformation and the coordinate value ZU of the vertical direction Dz included in the effective three-dimensional coordinate data of the upper object position 71U after coordinate transformation as the displacement Zd of the vertical direction Dz of the lower object position 71L and the upper object position 71U.

[0098] Zd=(ZL-ZU) / 2

[0099] 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.

[0100] Next, various methods for acquiring effective three-dimensional coordinate data in the effective coordinate acquisition unit 62 will be explained.

[0101] <First-hand method>

[0102] In the first mastering method, the primary processing unit 62a of the effective coordinate mastering unit 62 performs a primary processing step S2a, and the secondary processing unit 62b of the effective coordinate mastering unit 62 performs a secondary processing step S2b to master the effective three-dimensional coordinate data at the lower first position 72La, the lower second position 72Lb, multiple lower object positions 71L, the upper first position 72Ua, the upper second position 72Ub, and multiple upper object positions 71U.

[0103] In a single processing step S2a, such as Figure 8 As shown, the primary processing unit 62a of the effective coordinate acquisition unit 62 acquires effective three-dimensional coordinate data for multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub. Here, the lower edge first position 73La is the position at the boundary between the lower flange surface 33L and the first supported portion 35a. The lower edge second position 73Lb is the position at the boundary between the lower flange surface 33L and the second supported portion 35b. The upper edge first position 73Ua is the position in the upper flange surface 33U where its horizontal position coincides with the lower edge first position 73La. The upper edge second position 73Ub is the position in the upper flange surface 33U where its horizontal position coincides with the lower edge second position 73Lb.

[0104] When the first mastering method is executed in the effective coordinate mastering process S2, the measured three-dimensional coordinate data at multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, and multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub are received in the measured coordinate receiving process S1. In the effective coordinate mastering process S2, the primary processing unit 62a sets the measured three-dimensional coordinate data at multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, and multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub received in the measured coordinate receiving process S1 as valid three-dimensional coordinate data at multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, and multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub.

[0105] The effective coordinate acquisition unit 62 can obtain three-dimensional coordinate data of multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub 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 acquisition 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, which is consistent with the horizontal coordinate value, from the measured three-dimensional coordinate data of multiple positions received by the measured coordinate acquisition unit 61, and identifies this measured three-dimensional coordinate data as the measured three-dimensional coordinate data of a lower object position 71L.

[0106] In the secondary processing step S2b, the secondary processing unit 62b of the effective coordinate grasping unit 62 uses multiple effective three-dimensional coordinate data from the lower object position 71L, the lower edge first position 73La, and the lower edge second position 73Lb to estimate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. Furthermore, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data from the upper object position 71U, the upper edge first position 73Ua, and the upper edge second position 73Ub to estimate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub.

[0107] If the secondary processing unit 62b estimates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, then... Figure 10As shown, a high-dimensional function F, such as a quadratic function, is used to approximate the surface shape of the lower flange surface 33L by using valid three-dimensional coordinate data at multiple lower object positions 71L, the first lower edge position 73La, and the second lower edge position 73Lb. The secondary processing unit 62b uses this high-dimensional function F to extrapolate the vertical coordinate values ​​of the horizontal direction Dz relative to the horizontal coordinate values ​​of the first lower edge position 72La shown in the reference three-dimensional shape data 58d. Then, the secondary processing unit 62b replaces the vertical coordinate values ​​of the vertical direction Dz in each direction related to the first lower edge position 72La shown in the reference three-dimensional shape data 58d with the previously calculated vertical coordinate values ​​of the vertical direction Dz, setting them as valid three-dimensional coordinate data for the first lower edge position 72La. Furthermore, the secondary processing unit 62b uses this high-dimensional function F to calculate the vertical coordinate values ​​of the vertical direction Dz relative to the horizontal coordinate values ​​of the second lower edge position 72Lb shown in the reference three-dimensional shape data 58d. Then, the secondary processing unit 62b replaces the coordinate values ​​of the vertical direction Dz in each direction related to the lower second position 72Lb shown in the reference three-dimensional shape data 58d with the previously calculated coordinate values ​​of the vertical direction Dz, and sets them as the effective three-dimensional coordinate data of the lower second position 72Lb. The secondary processing unit 62b calculates the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub in the same way as above.

[0108] 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 11 As 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 secondary processing unit 62b uses valid three-dimensional coordinate data at multiple lower object positions 71L and the lower edge first position 73La near the lower edge first position 73La, and approximates the surface shape of the lower flange surface 33L near the lower edge first position 73La using a linear function Fa. Then, the coordinate value of the vertical direction Dz of the lower first position 72La is obtained using the linear function Fa. Furthermore, the secondary processing unit 62b uses valid three-dimensional coordinate data at multiple lower object positions 71L and the lower edge second position 73Lb near the lower edge second position 73Lb, and approximates the surface shape of the lower flange surface 33L near the lower edge second position 73Lb using a linear function Fb. Then, the coordinate value of the vertical direction Dz of the lower second position 72Lb is obtained using the linear function Fb.

[0109] The above provides the effective 3D coordinate data for the first lower position 72La, the second lower position 72Lb, multiple lower object positions 71L, the first upper position 72Ua, the second upper position 72Ub, and multiple upper object positions 71U.

[0110] 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.

[0111] The secondary processing unit 62b uses multiple effective three-dimensional coordinate data from lower object positions 71L, lower edge first positions 73La, and lower edge second positions 73Lb to estimate the effective three-dimensional coordinate data at lower first positions 72La and lower second positions 72Lb. Furthermore, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data from upper object positions 71U, upper edge first positions 73Ua, and upper edge second positions 73Ub to estimate the effective three-dimensional coordinate data at upper first positions 72Ua and upper second positions 72Ub. However, in the secondary processing step S2b, when estimating the effective three-dimensional coordinate data at lower first positions 72La and lower second positions 72Lb, it is also possible to... Figure 12 As shown, multiple valid three-dimensional coordinate data representing positions 75L in the lower width direction are used instead of multiple valid three-dimensional coordinate data representing lower object positions 71L. Furthermore, when estimating the valid three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, multiple valid three-dimensional coordinate data representing positions 75U in the upper width direction can also be used instead of multiple valid three-dimensional coordinate data representing upper object positions 71U.

[0112] Here, the lower width direction representative position 75L refers to the specified position in the central axis direction Dy of the lower flange surface 33L and the center position in the flange width direction Dw. Similarly, the upper width direction representative position 75U refers to the specified position in the central axis direction Dy of the upper flange surface 33U and the center position in the flange width direction Dw. Furthermore, 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 specified position to the outer or inner edge of the flange surface. It should be noted that the specified position in the lower flange surface 33L is the lower object position 71L, and the specified position in the upper flange surface 33U is the upper object position 71U.

[0113] In the measured coordinate acceptance process S1, measured three-dimensional coordinate data at multiple lower width direction representative positions 75L and multiple upper width direction representative positions 75U are accepted. In the first processing step S2a of the effective coordinate mastering process S2, the measured three-dimensional coordinate data at the multiple lower width direction representative positions 75L and multiple upper width direction representative positions 75U are set as effective three-dimensional coordinate data at the multiple lower width direction representative positions 75L and multiple upper width direction representative positions 75U, respectively. Then, in the second processing step S2b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, the effective three-dimensional coordinate data at the multiple lower width direction representative positions 75L are used as described above. Furthermore, in the second processing step S2b, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, the effective three-dimensional coordinate data at the multiple upper width direction representative positions 75U are used.

[0114] The variation trends of the effective three-dimensional coordinate data at the lower edge first position 73La, lower edge second position 73Lb, and the lower width direction representative position 75L more accurately reflect the three-dimensional coordinate data of the lower first position 73La, lower edge second position 73Lb, and the inner edge position of the lower flange surface 33L, and the lower first position 73La, lower edge second position 73Lb, and the outer edge position of the lower flange surface 33L, compared to the variation trends of the three-dimensional coordinate data of the lower first position 73La, lower edge second position 73Lb, and the lower flange surface 33L. Therefore, in order to improve the estimation accuracy of the three-dimensional coordinate data of the lower first position 72La and lower second position 72Lb, it is preferable to estimate the lower first position 72La and lower second position 72Lb based on the variation trends of the effective three-dimensional coordinate data at the lower edge first position 73La, lower edge second position 73Lb, and the lower width direction representative position 75L.

[0115] Furthermore, the variation trends of the effective three-dimensional coordinate data at the upper edge first position 73Ua, upper edge second position 73Ub, and upper width direction representative position 75U more accurately reflect the three-dimensional coordinate data of the upper first position 72Ua and upper second position 72Ub compared to the variation trends of the three-dimensional coordinate data at the inner edge position of the upper flange surface 33Ua, the upper edge second position 73Ub, and the outer edge position of the upper flange surface 33Ub. Therefore, in order to improve the estimation accuracy of the three-dimensional coordinate data at the upper first position 72Ua and upper second position 72Ub, it is preferable to estimate the upper first position 72Ua and upper second position 72Ub based on the variation trends of the effective three-dimensional coordinate data at the upper edge first position 73Ua, upper edge second position 73Ub, and upper width direction representative position 75U.

[0116] <Second Mastery Method>

[0117] In the second, third, and fourth mastering methods, as in the first mastering method, the primary processing unit 62a of the effective coordinate mastering unit 62 performs a primary processing step S2a, and the secondary processing unit 62b of the effective coordinate mastering unit 62 performs a secondary processing step S2b. The secondary processing step S2b in the second, third, and fourth mastering methods is substantially the same as the secondary processing step S2b in the first mastering method. Therefore, the primary processing step S2a will be mainly described below.

[0118] 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 13 The measured three-dimensional coordinate data are shown at the following locations.

[0119] a. Measured 3D coordinate data at multiple locations 78 on the lower virtual line 76L that passes through the lower object location 71L and extends along the flange width direction, for each of the multiple lower object locations 71L.

[0120] b. Measured three-dimensional coordinate data at multiple locations 78 on the upper virtual line 76U that passes through the upper object location 71U and extends along the flange width direction, for each of the multiple upper object locations 71U.

[0121] c. Measured three-dimensional coordinate data at multiple locations 78 on the first virtual line 77La of the lower edge, which passes through the first position 73La of the lower edge and extends along the width direction of the flange.

[0122] d. Measured three-dimensional coordinate data at multiple locations 78 on the lower second virtual line 77Lb, which passes through the lower edge second position 73Lb and extends along the flange width direction.

[0123] e. Measured three-dimensional coordinate data of multiple locations 78 on the upper first virtual line 77Ua that passes through the first position 73Ua of the upper edge and extends along the width direction of the flange.

[0124] f. Measured three-dimensional coordinate data at multiple locations 78 on the upper second virtual line 77Ub, which passes through the upper edge second position 73Ub and extends along the flange width direction.

[0125] Here, the flange width direction refers to the direction connecting the outer and inner edges of the flange surface, which 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 following: upper object position 71U, lower object position 71L, lower edge first position 73La, lower edge second position 73Lb, upper edge first position 73Ua, and upper edge second position 73Ub. 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.

[0126] In the first processing step S2a of the second mastering method, the first processing unit 62a of the effective coordinate mastering unit 62 uses multiple measured three-dimensional coordinate data received in the measured coordinate receiving step S1 to master the effective three-dimensional coordinate data at multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub. That is, the first processing unit 62a masters the effective three-dimensional coordinate data at all the above-mentioned reference positions.

[0127] like Figure 14 As shown, the primary processing unit 62a uses measured three-dimensional coordinate data at multiple positions 78 on a virtual line 76 extending along the flange width direction Dw and passing through the reference position 71 to calculate a function F2 that approximately represents the coordinate values ​​of the vertical direction Dz at the multiple positions 78 on the virtual line 76. The primary processing unit 62a uses function F2 to extrapolate the coordinate values ​​of the vertical direction Dz at the reference position 71. Then, the primary processing unit 62a 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 valid three-dimensional coordinate data for the reference position 71.

[0128] In the second processing step S2b of the second mastering method, similar to the second processing step S2b of the first mastering method, the secondary processing unit 62b of the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at lower object positions 71L, lower edge first positions 73La, and lower edge second positions 73Lb to estimate the effective three-dimensional coordinate data at lower first positions 72La and lower second positions 72Lb. Furthermore, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data at upper object positions 71U, upper edge first positions 73Ua, and upper edge second positions 73Ub to estimate the effective three-dimensional coordinate data at upper first positions 72Ua and upper second positions 72Ub.

[0129] The above provides the effective 3D coordinate data for the first lower position 72La, the second lower position 72Lb, multiple lower object positions 71L, the first upper position 72Ua, the second upper position 72Ub, and multiple upper object positions 71U.

[0130] 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 suppresses the possibility of containing significant measurement errors.

[0131] In the above, when the secondary processing unit 62b estimates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, it uses multiple effective three-dimensional coordinate data at the lower object position 71L. Furthermore, when the secondary processing unit 62b estimates the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, it uses multiple effective three-dimensional coordinate data at the upper object position 71U. However, in the second mastering method, as described in the first mastering method, in the secondary processing step S2b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, multiple effective three-dimensional coordinate data representing the lower width direction position 75L can be used instead of multiple effective three-dimensional coordinate data at the lower object position 71L. Furthermore, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, multiple effective three-dimensional coordinate data representing the upper width direction position 75U can also be used.

[0132] In this case, the effective three-dimensional coordinate data representing position 75L in the lower width direction and position 75U in the upper width direction are obtained by the primary processing unit 62a using the function F2 used when obtaining the effective three-dimensional coordinate data of the reference position 71.

[0133] <Third Mastery Method>

[0134] When the third mastering method is executed in the effective coordinate mastering process S2, such as Figure 15 and Figure 16As 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 16 It 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.

[0135] In the third mastering method, the primary processing step S2a is similar to the primary processing step S2a in the mastering method described above. The primary processing unit 62a of the effective coordinate mastering unit 62 masters the effective three-dimensional coordinate data of multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub. That is to say, the primary processing unit 62a masters the effective three-dimensional coordinate data of all the above-mentioned reference positions 71.

[0136] In this primary processing step S2a, the primary processing unit 62a firstly... Figure 17 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 primary processing unit 62a 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 using line segments, and sets the polygon plane enclosed by these line segments as polygon 86.

[0137] Next, the primary processing unit 62a processes multiple polygon data, such as Figure 18 The diagram illustrates the extraction of multiple polygon data points that satisfy a certain condition. It should be noted that... Figure 18 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 18 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 primary processing unit 62a first calculates the normal n of each of the plurality of polygons 86. Next, the primary processing unit 62a calculates the angle α between the perpendicular p 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 primary processing unit 62a extracts from the plurality of polygon data multiple polygons where the angle α between the perpendicular p relative to the flange surface 80 and the normal n of the polygon 86 is within a specified angle (specified inclination).

[0138] 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 19 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.

[0139] The primary processing unit 62a then proceeds as follows Figure 20 As shown, the virtual three-dimensional space including the flange surface 80 is divided into multiple three-dimensional blocks 83. Then, the primary processing unit 62a 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 primary processing unit 62a sets the point that is the median of the multiple points 85 included in the polygon 86a 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.

[0140] 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.

[0141] The primary processing unit 62a generates surface shape data for 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 acquisition unit 62 uses the surface shape data of the entire flange surface represented by the function F3 to determine the effective three-dimensional coordinate data at the aforementioned reference position 71.

[0142] In the secondary processing step S2b of the third mastering method, similar to the secondary processing step S2b of the first mastering method, the secondary processing unit 62b of the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at lower object positions 71L, lower edge first positions 73La, and lower edge second positions 73Lb to estimate the effective three-dimensional coordinate data at lower first positions 72La and lower second positions 72Lb. Furthermore, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data at upper object positions 71U, upper edge first positions 73Ua, and upper edge second positions 73Ub to estimate the effective three-dimensional coordinate data at upper first positions 72Ua and upper second positions 72Ub.

[0143] The above provides the effective 3D coordinate data for the first lower position 72La, the second lower position 72Lb, multiple lower object positions 71L, the first upper position 72Ua, the second upper position 72Ub, and multiple upper object positions 71U.

[0144] The third mastery method is not only less susceptible to local shape changes compared to the second mastery method, but it also suppresses the possibility of large measurement errors. Moreover, the third mastery method can still obtain valid three-dimensional coordinate data at the reference position even in the presence of large-scale data loss caused by obstacles or other factors.

[0145] In the above-described secondary processing unit 62b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, multiple effective three-dimensional coordinate data at the lower object position 71L are used. Furthermore, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data at the upper object position 71U. However, in the third grasping method, as described in the first and second grasping methods, in the secondary processing step S2b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, multiple effective three-dimensional coordinate data representing the lower width direction position 75L can be used instead of multiple effective three-dimensional coordinate data at the lower object position 71L. Furthermore, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, multiple effective three-dimensional coordinate data representing the upper width direction position 75U can also be used.

[0146] In this case, the effective three-dimensional coordinate data representing position 75L in the lower width direction and position 75U in the upper width direction are obtained by the primary processing unit 62a using the function F3 used when obtaining the effective three-dimensional coordinate data of the reference position 71.

[0147] <Fourth Method of Mastery>

[0148] When the fourth mastering method is executed in the effective coordinate mastering process S2, such as Figure 21 and Figure 22 As 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 22 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 21As shown, the reference measurement area 79 refers to the area 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, 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 receiving process S1 of the fourth mastering method is greater than the number of measured three-dimensional coordinate data for positions on the virtual line received in the measured coordinate receiving process S1 of the second mastering method.

[0149] In the first processing step S2a of the fourth mastering method, similar to the first processing step S2a of the mastering method above, the first processing unit 62a of the effective coordinate mastering unit 62 masters the effective three-dimensional coordinate data of multiple lower object positions 71L, lower edge first position 73La, lower edge second position 73Lb, multiple upper object positions 71U, upper edge first position 73Ua, and upper edge second position 73Ub. That is to say, the first processing unit 62a masters the effective three-dimensional coordinate data of all the above-mentioned reference positions 71.

[0150] In this primary processing step S2a, the primary processing unit 62a, similar to the primary processing step S2a in the third mastering method, first uses measured three-dimensional coordinate data at multiple locations 78 to generate multiple polygon data, and then extracts multiple polygon data that satisfy a certain condition from the multiple polygon data. The result is, as follows: Figure 23 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.

[0151] The primary processing unit 62a then proceeds in the same manner as the primary processing step S2a in the third mastering method, such as... Figure 24 As shown, the virtual three-dimensional space including the flange surface 80 is divided into multiple three-dimensional blocks 83. Then, the primary processing unit 62a determines a representative point 87 in each of the multiple three-dimensional blocks 83 as the object.

[0152] The primary processing unit 62a generates surface shape data for 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 F4 that represents the shape within the reference measurement area 79 in the flange surface. The primary processing unit 62a uses the surface shape data represented by the function F4 to determine the effective three-dimensional coordinate data at the aforementioned reference position 71.

[0153] In the secondary processing step S2b of the fourth mastering method, similar to the secondary processing step S2b of the first mastering method, the secondary processing unit 62b of the effective coordinate mastering unit 62 uses multiple effective three-dimensional coordinate data at lower object positions 71L, lower edge first positions 73La, and lower edge second positions 73Lb to estimate the effective three-dimensional coordinate data at lower first positions 72La and lower second positions 72Lb. Furthermore, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data at upper object positions 71U, upper edge first positions 73Ua, and upper edge second positions 73Ub to estimate the effective three-dimensional coordinate data at upper first positions 72Ua and upper second positions 72Ub.

[0154] The above provides the effective 3D coordinate data for the first lower position 72La, the second lower position 72Lb, multiple lower object positions 71L, the first upper position 72Ua, the second upper position 72Ub, and multiple upper object positions 71U.

[0155] The fourth mastery method is not only less susceptible to local shape changes compared to the second mastery method, but it also suppresses the possibility of large measurement errors. Moreover, the fourth mastery method can still obtain valid three-dimensional coordinate data at the reference position even in the presence of large-scale data loss caused by obstacles or other factors.

[0156] 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.

[0157] In the above-described secondary processing unit 62b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, multiple effective three-dimensional coordinate data at the lower object position 71L are used. Furthermore, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, the secondary processing unit 62b uses multiple effective three-dimensional coordinate data at the upper object position 71U. However, in the fourth mastering method, as described in the above mastering methods, in the secondary processing step S2b, when estimating the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb, multiple effective three-dimensional coordinate data representing the lower width direction position 75L can be used instead of multiple effective three-dimensional coordinate data at the lower object position 71L. Additionally, when estimating the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub, multiple effective three-dimensional coordinate data representing the upper width direction position 75U can also be used.

[0158] In this case, the effective three-dimensional coordinate data representing position 75L in the lower width direction and position 75U in the upper width direction are obtained by the primary processing unit 62a using the function F4 used when obtaining the effective three-dimensional coordinate data of the reference position 71.

[0159] As described above, in this embodiment, the vertical displacement of the upper object position 71U and the lower object position 71L is calculated based on the difference between the position of the upper object position 71U (where the vertical displacement Dz is to be obtained in the upper flange surface 33U) and the position of the lower object position 71L (where the vertical displacement Dz is to be obtained in the lower flange surface 33L). Therefore, in this embodiment, the vertical displacement of the upper object position 71U and the lower object position 71L can be calculated even without using finite element models of the lower and upper shells 30U to simulate their deformation. Thus, in this embodiment, the computational load when calculating the displacement is reduced. Therefore, in this embodiment, the preparation period for estimating the flange surface is shortened, and the estimation cost is reduced.

[0160] In this embodiment, when calculating the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz, the three-dimensional coordinate data of the following four points in the open state are required.

[0161] a) The lower first position 72La, located in the horizontal direction of the surface connected to the lower flange surface 33L, coincides with the first representative position 74a in the first supported portion 35a where the maximum load is applied.

[0162] b) The lower second position 72Lb, located in the horizontal direction of the surface connected to the lower flange surface 33L, coincides with the second representative position 74b in the second supported portion 35b where the maximum load is applied.

[0163] c) The upper first position 72Ua, located in the horizontal direction of the surface connected to the upper flange surface 33U, is consistent with the first representative position 74a.

[0164] d) The upper second position 72Ub, located in the horizontal direction of the surface connected to the upper flange surface 33U, is consistent with the second representative position 74b.

[0165] In this embodiment, the effective three-dimensional coordinate data of the above four points are estimated by performing a first processing step S2a and a second processing step S2b. Therefore, in this embodiment, even if it is assumed that the upper surface 35ap of the first supported part 35a and the upper surface 35bp of the second supported part 35b are offset relative to the lower flange surface 33L in the vertical direction Dz, and 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 cannot be obtained, the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz can still be calculated.

[0166] 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. This includes steps involving estimated data.

[0167] <Postscript>

[0168] The method for estimating the flange displacement of the rotating machinery in the above embodiments is as follows, for example.

[0169] (1) The method for estimating the flange displacement of rotating machinery in the first scheme is applied to the following rotating machinery.

[0170] 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 allow the plurality of bolts 39 to be inserted. The upper surface 35ap of the first supported portion 35a and the upper surface 35bp of the second supported portion 35b are offset relative to the lower flange surface 33L in the vertical direction Dz.

[0171] In the above method for estimating the flange displacement of rotating machinery, the following steps are performed:

[0172] The measured coordinate acceptance process S1 accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and multiple locations on 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, the lower second position 72Lb, and the lower object position 71L, and 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 72La, the lower second position 72Lb, and the lower object position 71L. The effective three-dimensional coordinate data for positions 72Ua, 72Ub, and 71U are as follows: The first lower position 72La is the position in the virtual surface connected to the lower flange surface 33L, where its horizontal position coincides with the first representative position 74a in the first supported portion 35a where the maximum load is applied; the second lower position 72Lb is the position in the virtual surface connected to the lower flange surface 33L, where its horizontal position coincides with the second representative position 74b in the second supported portion 35b where the maximum load is applied; and the lower object position 71L is the position in the lower flange surface 33L where the upper half-shell 30U and the lower half-shell 30L are to be tightened by the plurality of bolts 39 from the open state. The position of the displacement in the vertical direction Dz when the device is in a fixed and tight state is as follows: the upper first position 72Ua is the position in the virtual surface connected to the upper flange surface 33U, where its horizontal position coincides with the first representative position 74a; the upper second position 72Ub is the position in the virtual surface connected to the upper flange surface 33U, where its horizontal position coincides with the second representative position 74b; and the upper object position 71U is the position in the upper flange surface 33U, where its horizontal position coincides with the lower object position 71L. The coordinate change process S3 changes the effective three-dimensional coordinate data obtained in the effective coordinate mastering process S2, so that the effective three-dimensional coordinate data of the lower first position 72La obtained in the effective coordinate mastering process S2 is... The coordinate data 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 obtained in the effective coordinate acquisition process S2 is consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; and the displacement calculation process S4 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 fastened state based on the difference between the position of the upper object position 71U in the vertical direction Dz shown by the effective three-dimensional coordinate data of the upper object position 71U after the coordinate change process S3 and the position of the lower object position 71L in the vertical direction Dz shown by the effective three-dimensional coordinate data of the lower object position 71L after the coordinate change process S3.The effective coordinate acquisition process S2 includes the following steps: a primary processing step S2a, using the measured three-dimensional coordinate data at multiple locations on the lower flange surface 33L to acquire the effective three-dimensional coordinate data at the lower edge first position 73La, the lower edge second position 73Lb, and the lower object position 71L, and using the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U to acquire the effective three-dimensional coordinate data at the upper edge first position 73Ua, the upper edge second position 73Ub, and the upper object position 71U, wherein the lower edge first position 73La represents the position of the boundary between the lower flange surface 33L and the first supported portion 35a, the lower edge second position 73Lb represents the position of the boundary between the lower flange surface 33L and the second supported portion 35b, and the upper edge first position 73Ua is the position of the boundary between the upper flange surface 33L and the second supported portion 35b. The horizontal position in the upper flange surface 33U is the same as the lower edge first position 73La, and the horizontal position in the upper flange surface 33U is the same as the lower edge second position 73Lb; and the secondary processing step S2b, based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the lower flange surface 33L including the lower edge first position 73La and the lower edge second position 73Lb, the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb are estimated, and based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the upper flange surface 33U including the upper edge first position 73Ua and the upper edge second position 73Ub, the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub are estimated.

[0173] In this scheme, the vertical displacement of the upper object position 71U and the lower object position 71L when the shell 30 changes from an open state to a fixed state is calculated based on the difference between the vertical displacement Dz of the upper object position 71U (where the displacement Dz of the shell 30 is to be obtained from the upper flange surface 33U) and the vertical displacement Dz of the lower object position 71L (where the displacement Dz of the shell 30 is to be obtained from the lower flange surface 33L). Therefore, in this scheme, even without using finite element models of the lower shell 30L and the upper 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 scheme, the computational load when calculating the displacement can be suppressed.

[0174] In this scheme, when calculating the vertical displacement Dz of the upper object position 71U and the lower object position 71L, the following 4 points in the open state are required.

[0175] a) The lower first position 72La, located in the horizontal direction of the surface connected to the lower flange surface 33L, coincides with the first representative position 74a in the first supported portion 35a where the maximum load is applied.

[0176] b) The lower second position 72Lb, located in the horizontal direction of the surface connected to the lower flange surface 33L, coincides with the second representative position 74b in the second supported portion 35b where the maximum load is applied.

[0177] c) The upper first position 72Ua, located in the horizontal direction of the surface connected to the upper flange surface 33U, is consistent with the first representative position 74a.

[0178] d) The upper second position 72Ub, located in the horizontal direction of the surface connected to the upper flange surface 33U, is consistent with the second representative position 74b.

[0179] In this scheme, the effective three-dimensional coordinate data of the above four points are estimated by performing a first processing step S2a and a second processing step S2b. Therefore, in this scheme, even if it is assumed that the upper surface 35ap of the first supported part 35a and the upper surface 35bp of the second supported part 35b are offset in the vertical direction Dz relative to the lower flange surface 33L, and 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 cannot be obtained, the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz can still be calculated.

[0180] (2) In the method for estimating the flange displacement of rotating machinery in the second scheme,

[0181] In the method for estimating the flange displacement of rotating machinery in the first scheme, in the first processing step S2a, the measured three-dimensional coordinate data at multiple positions on the lower flange surface 33L are used to obtain the effective three-dimensional coordinate data at the representative position 75L in the lower width direction, and the measured three-dimensional coordinate data at multiple positions on the upper flange surface 33U are used to obtain the effective three-dimensional coordinate data at the representative position 75U in the upper width direction. The representative position 75L in the lower width direction is the center position of the axial direction Dy and the flange width direction Dw in the lower flange surface 33L, and the representative position 75U in the upper width direction is the position in the upper flange surface 33U whose horizontal position is consistent with the representative position 75L in the lower width direction. In the secondary processing step S2b, the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower width direction representative position 75L. Similarly, the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper width direction representative position 75U.

[0182] The variation trends of the effective three-dimensional coordinate data at the lower edge first position 73La, lower edge second position 73Lb, and lower width direction representative position 75L more accurately reflect the three-dimensional coordinate data of the lower first position 73La, lower edge second position 73Lb, and the inner edge position of the lower flange surface 33L, and the lower first position 73La, lower edge second position 73Lb, and the outer edge position of the lower flange surface 33L, compared to the variation trends of the three-dimensional coordinate data of the lower first position 73La, lower edge second position 73Lb, and lower flange surface 33L. Therefore, in this scheme, the lower first position 72La and lower second position 72Lb are estimated based on the variation trends of the effective three-dimensional coordinate data at the lower edge first position 73La, lower edge second position 73Lb, and lower width direction representative position 75L.

[0183] Furthermore, the variation trends of the effective three-dimensional coordinate data at the upper edge first position 73Ua, upper edge second position 73Ub, and upper width direction representative position 75U more accurately reflect the three-dimensional coordinate data of the upper first position 73Ua and upper second position 72Ub compared to the variation trends of the three-dimensional coordinate data at the inner edge position of the upper flange surface 33Ua, the upper edge second position 73Ub, and the outer edge position of the upper flange surface 33Ub. Therefore, in this scheme, the upper first position 72Ua and upper second position 72Ub are estimated based on the variation trends of the effective three-dimensional coordinate data at the upper edge first position 73Ua, upper edge second position 73Ub, and upper width direction representative position 75U.

[0184] (3) In the method for estimating the flange displacement of rotating machinery in the third scheme,

[0185] In the method for estimating the flange displacement of rotating machinery in the first scheme, in the secondary processing step S2b, the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower object position 71L. Similarly, the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper object position 71U.

[0186] In this solution, the effective three-dimensional coordinate data at the lower object position 71L, required in the displacement calculation step S4, are used to estimate the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb. Furthermore, in this solution, the effective three-dimensional coordinate data at the upper object position 71U, required in the displacement calculation step S4, are used to estimate the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub. Therefore, in this solution, the time required to estimate the effective 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 can be minimized.

[0187] (4) In the method for estimating the flange displacement of rotating machinery in the fourth scheme,

[0188] In the method for estimating the flange displacement of rotating machinery in any of the first to the third schemes, in the displacement calculation step S4, half of the difference is set as the displacement of the upper object position 71U and the displacement of the lower object position 71L.

[0189] (5) In the method for estimating the flange displacement of rotating machinery in the fifth scheme,

[0190] In the method for estimating the flange displacement of rotating machinery in any of the first to fourth schemes, 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 of the lower flange surface 33L.

[0191] 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 in the lower flange surface 33L where the stationary part storage portion 36 is formed in the axial direction Dy, and the position of the inner edge of the lower flange surface 33L; and the position in the upper flange surface 33U where the stationary part storage portion 36 is formed in the axial direction Dy, 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 can be managed with high precision when the housing 30 changes from an open state to a fixed state.

[0192] (6) In the method for estimating the flange displacement of rotating machinery in the sixth scheme,

[0193] In the flange displacement estimation method of any of the first to fifth schemes, in the measured coordinate acceptance step S1, the measured three-dimensional coordinate data of 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 of the lower object position 71L is mastered as the effective three-dimensional coordinate data of the lower object position 71L, and the measured three-dimensional coordinate data of the upper object position 71U obtained in the measured coordinate acceptance step S1 is mastered as the effective three-dimensional coordinate data of the upper object position 71U.

[0194] In this scheme, the measured three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb obtained in the measured coordinate acceptance process S1 are used as the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb, thus suppressing the computational load.

[0195] (7) In the method for estimating the flange displacement of rotating machinery in the seventh scheme,

[0196] In the method for estimating the flange displacement of rotating machinery according to any of the first to fifth schemes, in the measured coordinate receiving step S1, measured three-dimensional coordinate data at multiple positions on the lower virtual line 76L that passes through the lower object position 71L and extends along the flange width direction Dw are received, and measured three-dimensional coordinate data at multiple positions on the upper virtual line 76U that passes through the upper object position 71U and extends along the flange width direction Dw are also received. In the effective coordinate mastering step S2, effective three-dimensional coordinate data of the lower object position 71L are calculated based on the measured three-dimensional coordinate data at multiple positions on the lower virtual line 76L, and effective three-dimensional coordinate data of the upper object position 71U are calculated based on the measured three-dimensional coordinate data at multiple positions on the upper virtual line 76U.

[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 76L, 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 76U. 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 suppress the possibility of containing large measurement errors.

[0198] (8) In the method for estimating the flange displacement of rotating machinery in the eighth scheme,

[0199] In the method for estimating the flange displacement of rotating machinery in any of the first to fifth 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 of 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 of 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 suppress the possibility of containing large measurement errors.

[0201] (9) In the method for estimating the flange displacement of rotating machinery in the ninth scheme,

[0202] In the method for estimating the flange displacement of rotating machinery according to any of the first to fifth schemes, 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, the effective three-dimensional coordinate data of the lower object position 71L is obtained using the shape data of the lower flange surface 33L, and the effective three-dimensional coordinate data of the upper object position 71U is obtained using the shape data of the upper flange surface 33U.

[0203] 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 suppress the possibility of large measurement errors. Furthermore, in this scheme, even in the presence of large-scale data loss caused by obstacles, the effective three-dimensional coordinate data for the lower object position 71L and the upper object position 71U can still be obtained.

[0204] The procedure for estimating the flange displacement of the rotating machinery in the above embodiments is as follows.

[0205] (10) The flange displacement estimation procedure of the tenth scheme for rotating machinery is applied to the following rotating machinery.

[0206] The rotating machinery includes: a rotor 15, capable of rotating about a horizontally extending axis Ar; 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 a downward-facing upper flange surface 33U. The lower housing 30L has: a lower flange 32L, which has an upward-facing lower flange surface 33L opposite to the upper flange surface 33U in the vertical direction Dz; and a first supported portion 35a and a second supported portion 35b, which are 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, extending in the vertical direction Dz, for the insertion of the plurality of bolts 39. The upper surface 35ap of the first supported portion 35a and the upper surface 35bp of the second supported portion 35b are offset relative to the lower flange surface 33L in the vertical direction Dz.

[0207] The above procedure for estimating the flange displacement of rotating machinery causes the computer to execute the following steps:

[0208] The measured coordinate acceptance process S1 accepts measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and multiple locations on 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, the lower second position 72Lb, and the lower object position 71L, and 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 72La, the lower second position 72Lb, and the lower object position 71L. The effective three-dimensional coordinate data for positions 72Ua, 72Ub, and 71U are as follows: The first lower position 72La is the position in the virtual surface connected to the lower flange surface 33L, where its horizontal position coincides with the first representative position 74a in the first supported portion 35a where the maximum load is applied; the second lower position 72Lb is the position in the virtual surface connected to the lower flange surface 33L, where its horizontal position coincides with the second representative position 74b in the second supported portion 35b where the maximum load is applied; and the lower object position 71L is the position in the lower flange surface 33L where the upper half-shell 30U and the lower half-shell 30L are to be tightened by the plurality of bolts 39 from the open state. The position of the displacement Dz in the vertical direction when the device is in a fixed and tight state is as follows: the upper first position 72Ua is the position in the virtual surface connected to the upper flange surface 33U, where the horizontal position is consistent with the first representative position 74a; the upper second position 72Ub is the position in the virtual surface connected to the upper flange surface 33U, where the horizontal position is consistent with the second representative position 74b; the upper object position 71U is the position in the upper flange surface 33U, where the horizontal position is consistent with the lower object position 71L; the coordinate change process S3 changes the effective three-dimensional coordinate data obtained in the effective coordinate mastering process S2, so that the effective three-dimensional coordinates of the lower first position 72La obtained in the effective coordinate mastering process S2 are... The data 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 obtained in the effective coordinate acquisition process S2 is consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; and the displacement calculation process S4 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 fastened state based on the difference between the position of the upper object position 71U in the vertical direction Dz shown by the effective three-dimensional coordinate data of the upper object position 71U after the coordinate change process S3 and the position of the lower object position 71L in the vertical direction Dz shown by the effective three-dimensional coordinate data of the lower object position 71L after the coordinate change process S3.The effective coordinate acquisition process S2 includes the following steps: a primary processing step S2a, using the measured three-dimensional coordinate data at multiple locations on the lower flange surface 33L to acquire the effective three-dimensional coordinate data at the lower edge first position 73La, the lower edge second position 73Lb, and the lower object position 71L; and using the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U to acquire the effective three-dimensional coordinate data at the upper edge first position 73Ua, the upper edge second position 73Ub, and the upper object position 71U. The lower edge first position 73La represents the position on the lower flange surface 33L that is adjacent to the boundary with the first supported portion 35a; the lower edge second position 73Lb represents the position on the lower flange surface 33L that is adjacent to the boundary with the second supported portion 35b; and the upper edge first position 73Ua is the position on the upper flange surface 33U. The horizontal position of the connected surface is consistent with the lower edge first position 73La, and the upper edge second position 73Ub is the horizontal position of the connected surface with the upper flange surface 33U, which is consistent with the lower edge second position 73Lb; and the secondary processing step S2b, which estimates the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the lower flange surface 33L including the lower edge first position 73La and the lower edge second position 73Lb, and estimates the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the upper flange surface 33U including the upper edge first position 73Ua and the upper edge second position 73Ub.

[0209] In this solution, the computational load when calculating the displacement can be suppressed in the same way as in the first solution by having the computer execute the program. Moreover, in this solution, by having the computer execute the program, similar to the first solution, even if the upper surface 35ap of the first supported part 35a and the upper surface 35bp of the second supported part 35b are offset in the vertical direction Dz relative to the lower flange surface 33L, and 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 cannot be obtained, the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz can still be calculated.

[0210] (11) In the procedure for estimating the flange displacement of rotating machinery in the eleventh scheme,

[0211] In the flange displacement estimation procedure of the rotating machinery in the tenth scheme, in the first processing step S2a, the measured three-dimensional coordinate data at multiple positions in the lower flange surface 33L are used to obtain the effective three-dimensional coordinate data at the representative position 75L in the lower width direction, and the measured three-dimensional coordinate data at multiple positions in the upper flange surface 33U are used to obtain the effective three-dimensional coordinate data at the representative position 75U in the upper width direction. The representative position 75L in the lower width direction is the center position of the axial direction Dy in the lower flange surface 33L and the flange width direction Dw. The representative position 75U in the upper width direction is the same as the representative position 75L in the lower width direction in the horizontal direction of the upper flange surface 33U. In the secondary processing step S2b, the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower width direction representative position 75L. Similarly, the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper width direction representative position 75U.

[0212] In this scheme, by having a computer execute the program, the estimation accuracy of the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub can be improved in the same way as in the second scheme.

[0213] (12) In the procedure for estimating the flange displacement of rotating machinery in the twelfth scheme,

[0214] In the flange displacement estimation procedure of the rotating machinery in the tenth scheme, in the secondary processing step S2b, the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb are estimated based on the variation trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower object position 71L. Similarly, the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub are estimated based on the variation trend of the effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper object position 71U.

[0215] In this scheme, by having the computer execute the program, the time required to estimate the effective 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 can be minimized, just like in the third scheme.

[0216] (13) In the procedure for estimating the flange displacement of rotating machinery in the thirteenth scheme,

[0217] In the flange displacement estimation procedure of the rotating machinery in any of the tenth to twelfth schemes, in the displacement calculation step S4, half of the difference is set as the displacement of the upper object position 71U and the displacement of the lower object position 71L.

[0218] The flange displacement estimation device of the rotating machinery described in the above embodiments is as follows, for example.

[0219] (14) The flange displacement estimation device of the fourteenth scheme is applied to the following rotating machinery.

[0220] 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 allow the plurality of bolts 39 to be inserted. The upper surface 35ap of the first supported portion 35a and the upper surface 35bp of the second supported portion 35b are offset relative to the lower flange surface 33L in the vertical direction Dz.

[0221] The flange displacement estimation device 50 of the above-mentioned rotating machinery includes:

[0222] The measured coordinate receiving unit 61 receives measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U and multiple locations on 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 grasping unit 62 uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface 33L to grasp the effective three-dimensional coordinate data at the lower first position 72La, the lower second position 72Lb, and the lower object position 71L, and also uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U to grasp... The effective three-dimensional coordinate data for the upper first position 72Ua, upper second position 72Ub, and upper object position 71U, wherein the lower first position 72La is the position in the virtual surface connected to the lower flange surface 33L, in the horizontal direction, which coincides with the first representative position 74a in the first supported part 35a where the maximum load is applied; the lower second position 72Lb is the position in the virtual surface connected to the lower flange surface 33L, in the horizontal direction, which coincides with the second representative position 74b in the second supported part 35b where the maximum load is applied; and the lower object position 71L is the position in the lower flange surface 33L where it is desired to obtain the upper half housing 30U and the lower object position 71U from the open state by the plurality of bolts 39. The position of the vertical displacement Dz when the lower half shell 30L is fastened is as follows: the upper first position 72Ua is the position in the virtual surface connected to the upper flange surface 33U, where its horizontal position coincides with the first representative position 74a; the upper second position 72Ub is the position in the virtual surface connected to the upper flange surface 33U, where its horizontal position coincides with the second representative position 74b; and the upper object position 71U is the position in the upper flange surface 33U, where its horizontal position coincides with the lower object position 71L. The coordinate changing unit 63 changes the effective three-dimensional coordinate data grasped by the effective coordinate grasping unit 62, so that the lower first position 72Ua grasped by the effective coordinate grasping unit 62... The effective three-dimensional coordinate data of 2La 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 grasped by the effective coordinate grasping unit 62 is consistent with the effective three-dimensional coordinate data of the upper second position 72Ub; and the displacement calculation unit 64 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 fastened state based on the difference between the position of the upper object position 71U in the vertical direction Dz shown by the effective three-dimensional coordinate data of the upper object position 71U after coordinate change and the position of the lower object position 71L in the vertical direction Dz shown by the effective three-dimensional coordinate data of the lower object position 71L after coordinate change.The effective coordinate grasping unit 62 includes: a primary processing unit 62a, which uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface 33L to grasp the effective three-dimensional coordinate data at the lower edge first position 73La, the lower edge second position 73Lb, and the lower object position 71L, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface 33U to grasp the effective three-dimensional coordinate data at the upper edge first position 73Ua, the upper edge second position 73Ub, and the upper object position 71U. The lower edge first position 73La represents the position on the lower flange surface 33L that is the boundary with the first supported portion 35a, the lower edge second position 73Lb represents the position on the lower flange surface 33L that is the boundary with the second supported portion 35b, and the upper edge first position 73Ua is the position on the upper flange surface 33U that is connected to the upper flange surface 33U. The horizontal position in the surface is the same as the lower edge first position 73La, and the horizontal position in the surface connected to the upper flange surface 33U is the same as the lower edge second position 73Lb; and the secondary processing unit 62b estimates the effective three-dimensional coordinate data of the lower first position 72La and the lower second position 72Lb based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the lower flange surface 33L including the lower edge first position 73La and the lower edge second position 73Lb, and estimates the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub based on the variation trend of the effective three-dimensional coordinate data of multiple positions in the upper flange surface 33U including the upper edge first position 73Ua and the upper edge second position 73Ub.

[0223] In this solution, the computational load when calculating the displacement can be suppressed in the same way as in the first solution. Moreover, in this solution, by having a computer execute the program, the displacement of the upper object position 71U and the lower object position 71L in the vertical direction Dz can be calculated, 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 available due to the positional offset of the upper surface 35ap of the first supported part 35a and the upper surface 35bp of the second supported part 35b relative to the lower flange surface 33L.

[0224] (15) In the flange displacement estimation device of the rotating machinery in the fifteenth scheme

[0225] In the flange displacement estimation device 50 of the rotating machinery in the fourteenth embodiment, the primary processing unit 62a uses the measured three-dimensional coordinate data at multiple positions in the lower flange surface 33L to obtain the effective three-dimensional coordinate data at the representative position 75L in the lower width direction, and uses the measured three-dimensional coordinate data at multiple positions in the upper flange surface 33U to obtain the effective three-dimensional coordinate data at the representative position 75U in the upper width direction. The representative position 75L in the lower width direction is the center position of the axial direction Dy in the lower flange surface 33L and the flange width direction Dw, and the representative position 75U in the upper width direction is the position in the upper flange surface 33U whose horizontal position coincides with the representative position 75L in the lower width direction. The secondary processing unit 62b estimates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb based on the variation trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower width direction representative position 75L. It also estimates the effective three-dimensional coordinate data at the upper first position 72Ua and the upper second position 72Ub based on the variation trend of the effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper width direction representative position 75U.

[0226] In this scheme, the estimation accuracy of the effective three-dimensional coordinate data of the upper first position 72Ua and the upper second position 72Ub can be improved in the same way as in the second scheme.

[0227] (16) In the flange displacement estimation device of the rotating machinery in the sixteenth scheme

[0228] In the flange displacement estimation device 50 of the rotating machinery in the fourteenth embodiment, the secondary processing unit 62b estimates the effective three-dimensional coordinate data at the lower first position 72La and the lower second position 72Lb based on the changing trend of the effective three-dimensional coordinate data at the lower first position 73La, the lower second position 73Lb, and the lower object position 71L, and estimates 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 effective three-dimensional coordinate data at the upper first position 73Ua, the upper second position 73Ub, and the upper object position 71U.

[0229] In this scheme, the time required to estimate the effective 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 can be minimized, just like in the third scheme.

[0230] (17) In the flange displacement estimation device of the rotating machinery in the seventeenth scheme

[0231] In the flange displacement estimation device 50 of the rotating machinery in any of the fourteenth to sixteenth schemes, the displacement calculation unit 64 sets half of the difference as the displacement of the upper object position 71U and the displacement of the lower object position 71L.

[0232] Industrial availability

[0233] According to one aspect of this disclosure, the calculated load can be suppressed and the displacement of the flange surfaces of the upper and lower shells can be estimated. Therefore, in one aspect of this disclosure, the preparation period for estimating the flange surfaces can be shortened, and the estimation cost can be reduced. Furthermore, in one aspect of this disclosure, even when the upper surfaces of the first and second supported portions are offset relative to the lower flange surface in the vertical direction, making it impossible to obtain measured three-dimensional coordinate data for the lower first position, lower second position, upper first position, and upper second position, the vertical displacement of the upper and lower object positions can still be calculated.

[0234] Explanation of reference numerals in the attached figures

[0235] 10: Steam turbine (rotating machinery);

[0236] 11: Bracket;

[0237] 12a: First bearing assembly;

[0238] 12b: Second bearing assembly;

[0239] 13a: First shaft sealing device (stationary part);

[0240] 13b: Second shaft sealing device (stationary part);

[0241] 15: Rotor;

[0242] 16: Rotor shaft;

[0243] 17: Row of moving leaves;

[0244] 20: Diaphragm (stationary part);

[0245] 20L: Lower septum;

[0246] 20U: Upper septum;

[0247] 22: Quiet Leaf;

[0248] 23: Inner ring of the diaphragm;

[0249] 24: Diaphragm outer ring;

[0250] 25: Sealing device;

[0251] 30: Shell;

[0252] 30L: Lower half of the shell;

[0253] 30U: Upper shell;

[0254] 31L: Lower half of the shell body;

[0255] 31U: Upper shell main body;

[0256] 32L: Lower flange;

[0257] 32U: Upper flange;

[0258] 33L: Lower flange surface;

[0259] 33U: Upper flange surface;

[0260] 34: Bolt hole;

[0261] 35a: First supported part;

[0262] 35ap: Upper surface;

[0263] 35b: Second supported part;

[0264] 35bp: Top surface;

[0265] 36: Storage section for stationary parts;

[0266] 39: Bolt;

[0267] 50: Flange displacement estimation device;

[0268] 51: Manual input device;

[0269] 52: Display device;

[0270] 53: Input / output interface;

[0271] 54: Device interface;

[0272] 55: Communication interface;

[0273] 56: Storage / reproduction device;

[0274] 57: Memory;

[0275] 58: Auxiliary storage device;

[0276] 58d: Baseline 3D shape data;

[0277] 58p: Flange displacement estimation procedure;

[0278] 60: CPU;

[0279] 61: Measured Coordinates Acceptance Department;

[0280] 62: Effective coordinate control section;

[0281] 62a: Primary processing unit;

[0282] 62b: Secondary processing unit;

[0283] 63: Coordinate Change Section;

[0284] 64: Displacement calculation unit;

[0285] 69: Three-dimensional shape measuring device;

[0286] 71: Reference position;

[0287] 71L: Lower object position;

[0288] 71U: Upper object position;

[0289] 72La: First position below;

[0290] 72Ua: First position;

[0291] 72Lb: Second position below;

[0292] 72Ub: Second position above;

[0293] 73La: First position at the lower edge;

[0294] 73Ua: First position on the upper edge;

[0295] 73Lb: Second position at the lower edge;

[0296] 73Ub: Second position on the upper edge;

[0297] 74a: First representative position;

[0298] 74b: Second representative position;

[0299] 75L: The lower width direction represents the position;

[0300] 75U: The upper width direction represents the position;

[0301] 76: Virtual line;

[0302] 76L: Lower virtual line;

[0303] 76U: Virtual line;

[0304] 77La: First virtual line below;

[0305] 77Ua: First virtual line;

[0306] 77Lb: Second virtual line below;

[0307] 77Ub: Second virtual line;

[0308] 79: Refer to the measurement area;

[0309] 80: The flange surface shown in the baseline three-dimensional shape data;

[0310] 81: The reference position shown by the baseline three-dimensional shape data;

[0311] 82: The surface inclined relative to the flange surface as shown in the reference three-dimensional shape data;

[0312] 83: Three-dimensional blocks;

[0313] 85: dot;

[0314] 86, 86a, 86b: Polygons (polygonal planes);

[0315] 87: Representative point;

[0316] Ar: axis;

[0317] Dc: Peripheral direction;

[0318] Dr: Radial;

[0319] Dri: Radial inner side;

[0320] Dro: Radial outer side;

[0321] Dx: Horizontal direction;

[0322] Dy: Axis direction;

[0323] Dz: Up and down direction;

[0324] 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 the first supported portion and the second supported portion being separate 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 upper surfaces of the first supported portion and the second supported portion are offset relative to the lower flange surface in the vertical direction. 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, and lower object position. Similarly, it 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, and upper object position. The lower first position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The lower second position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The second representative position is the position where the maximum load is applied in the two supported parts. The lower object position is the position in the lower flange surface where the vertical displacement is to be obtained from the open state to the fastened state where the upper half shell and the lower half shell are fastened by the plurality of bolts. The upper first position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the first representative position. The upper second position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the second representative position. The upper object position is the position in the upper flange surface where the horizontal position is consistent with the lower object position. The coordinate change process modifies the valid three-dimensional coordinate data acquired in the valid coordinate mastering process, so that the valid three-dimensional coordinate data of the lower first position acquired in the valid coordinate mastering process is consistent with the valid three-dimensional coordinate data of the upper first position, and also makes the valid three-dimensional coordinate data of the lower second position acquired in the valid coordinate mastering process consistent with the valid three-dimensional coordinate data of the upper second position; and The displacement calculation step calculates the vertical displacement of the upper and lower object positions when they change from the open state to the fixed state, based on the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change step and the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change step. The effective coordinate acquisition process includes the following steps: In one processing step, the measured three-dimensional coordinate data at multiple locations on the lower flange surface are used to determine the effective three-dimensional coordinate data of the lower edge first position, the lower edge second position, and the lower object position. Similarly, the measured three-dimensional coordinate data at multiple locations on the upper flange surface are used to determine the effective three-dimensional coordinate data of the upper edge first position, the upper edge second position, and the upper object position. The lower edge first position represents the position on the lower flange surface that coincides with the boundary of the first supported portion; the lower edge second position represents the position on the lower flange surface that coincides with the boundary of the second supported portion; the upper edge first position is the position on the upper flange surface whose horizontal position coincides with the lower edge first position; and the upper edge second position is the position on the upper flange surface whose horizontal position coincides with the lower edge second position. The secondary processing step involves estimating the effective three-dimensional coordinate data at the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions on the lower flange surface, including the lower first position and the lower second position; and estimating the effective three-dimensional coordinate data at the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions on the upper flange surface, including the upper first position and the upper second position.

2. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the first processing step, the measured three-dimensional coordinate data at multiple locations on the lower flange surface are used to determine the effective three-dimensional coordinate data of the position representing the lower width direction, and the measured three-dimensional coordinate data at multiple locations on the upper flange surface are used to determine the effective three-dimensional coordinate data of the position representing the upper width direction. The position representing the lower width direction is a predetermined position in the axial direction of the lower flange surface and the center position in the flange width direction. The position representing the upper width direction is a position in the upper flange surface whose horizontal position coincides with the position representing the lower width direction. In the secondary processing step, the effective three-dimensional coordinate data at the lower first position and the lower second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the position represented by the lower width direction. Similarly, the effective three-dimensional coordinate data at the upper first position and the upper second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the position represented by the upper width direction.

3. The method for estimating the flange displacement of rotating machinery according to claim 1, wherein, In the secondary processing step, the effective three-dimensional coordinate data at the lower first position and the lower second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the lower object position. Similarly, the effective three-dimensional coordinate data at the upper first position and the upper second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the upper object position.

4. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, wherein, In the displacement calculation process, half of the difference is set as the displacement of the upper object position and the displacement of the lower object position.

5. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, wherein, The lower object position is the position where the stationary part is arranged in the axial direction, and is the position of the inner edge in the lower flange surface.

6. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, 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 mastering process, the measured three-dimensional coordinate data of the lower object position is used as the effective three-dimensional coordinate data of the lower object position as is, and the measured three-dimensional coordinate data of the upper object position obtained in the measured coordinate acceptance process is used as the effective three-dimensional coordinate data of the upper object position as is.

7. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, wherein, In the measured coordinate acceptance process, measured three-dimensional coordinate data from multiple locations on the lower virtual line extending along the flange width direction and passing through the lower object location are accepted, as are measured three-dimensional coordinate data from multiple locations on the upper virtual line extending along the flange width direction and passing 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 at multiple locations 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 at multiple locations on the upper virtual line.

8. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, 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 locations 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 locations in the upper measurement area obtained in the measured coordinate acceptance process.

9. The method for estimating the flange displacement of rotating machinery according to any one of claims 1 to 3, 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. The effective coordinate mastering process includes: 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 lower object position is obtained using the shape data of the lower flange surface, and the effective three-dimensional coordinate data of the upper object position is obtained using the shape data of the upper flange surface.

10. 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 the first supported portion and the second supported portion being separate 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 upper surfaces of the first supported portion and the second supported portion are offset relative to the lower flange surface in the vertical direction. In the flange displacement estimation program for the rotating machinery, the computer performs 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, and lower object position. Similarly, it 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, and upper object position. The lower first position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The lower second position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The second representative position is the position where the maximum load is applied in the two supported parts. The lower object position is the position in the lower flange surface where the vertical displacement is to be obtained from the open state to the fastened state where the upper half shell and the lower half shell are fastened by the plurality of bolts. The upper first position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the first representative position. The upper second position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the second representative position. The upper object position is the position in the upper flange surface where the horizontal position is consistent with the lower object position. The coordinate change process modifies the valid three-dimensional coordinate data acquired in the valid coordinate mastering process, so that the valid three-dimensional coordinate data of the lower first position acquired in the valid coordinate mastering process is consistent with the valid three-dimensional coordinate data of the upper first position, and also makes the valid three-dimensional coordinate data of the lower second position acquired in the valid coordinate mastering process consistent with the valid three-dimensional coordinate data of the upper second position; and The displacement calculation step calculates the vertical displacement of the upper and lower object positions when they change from the open state to the fixed state, based on the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after the coordinate change step and the vertical position shown in the effective three-dimensional coordinate data of the lower object position after the coordinate change step. The effective coordinate acquisition process includes the following steps: In one processing step, the measured three-dimensional coordinate data at multiple locations on the lower flange surface are used to determine the effective three-dimensional coordinate data of the lower edge first position, the lower edge second position, and the lower object position. Similarly, the measured three-dimensional coordinate data at multiple locations on the upper flange surface are used to determine the effective three-dimensional coordinate data of the upper edge first position, the upper edge second position, and the upper object position. The lower edge first position represents the position on the lower flange surface that coincides with the boundary of the first supported portion; the lower edge second position represents the position on the lower flange surface that coincides with the boundary of the second supported portion; the upper edge first position is the position on the upper flange surface whose horizontal position coincides with the lower edge first position; and the upper edge second position is the position on the upper flange surface whose horizontal position coincides with the lower edge second position. The secondary processing step involves estimating the effective three-dimensional coordinate data at the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions on the lower flange surface, including the lower first position and the lower second position; and estimating the effective three-dimensional coordinate data at the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions on the upper flange surface, including the upper first position and the upper second position.

11. The storage medium according to claim 10, which stores a program for estimating the flange displacement of rotating machinery, wherein, In the first processing step, the measured three-dimensional coordinate data at multiple locations on the lower flange surface are used to determine the effective three-dimensional coordinate data of the position representing the lower width direction, and the measured three-dimensional coordinate data at multiple locations on the upper flange surface are used to determine the effective three-dimensional coordinate data of the position representing the upper width direction. The position representing the lower width direction is a predetermined position in the axial direction of the lower flange surface and the center position in the flange width direction. The position representing the upper width direction is a position in the upper flange surface whose horizontal position coincides with the position representing the lower width direction. In the secondary processing step, the effective three-dimensional coordinate data at the lower first position and the lower second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the position represented by the lower width direction. Similarly, the effective three-dimensional coordinate data at the upper first position and the upper second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the position represented by the upper width direction.

12. The storage medium according to claim 10, which stores a program for estimating the flange displacement of rotating machinery, wherein, In the secondary processing step, the effective three-dimensional coordinate data at the lower first position and the lower second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the lower object position. Similarly, the effective three-dimensional coordinate data at the upper first position and the upper second position are estimated based on the changing trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the upper object position.

13. The storage medium storing a program for estimating the flange displacement of rotating machinery according to any one of claims 10 to 12, wherein, In the displacement calculation process, half of the difference is set as the displacement of the upper object position and the displacement of the lower object position.

14. 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 the first supported portion and the second supported portion being separate 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 upper surfaces of the first supported portion and the second supported portion are offset relative to the lower flange surface in the vertical direction. 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 measuring unit uses measured three-dimensional coordinate data from multiple locations on the lower flange surface to measure effective three-dimensional coordinate data for the lower first position, lower second position, and lower object position. It also uses measured three-dimensional coordinate data from multiple locations on the upper flange surface to measure effective three-dimensional coordinate data for the upper first position, upper second position, and upper object position. The lower first position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The lower second position is the position in the virtual surface connected to the lower flange surface where the horizontal direction coincides with the first representative position where the maximum load is applied in the first supported portion. The second representative position is the position where the maximum load is applied in the two supported parts. The lower object position is the position in the lower flange surface where the vertical displacement is to be obtained from the open state to the fastened state where the upper half shell and the lower half shell are fastened by the plurality of bolts. The upper first position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the first representative position. The upper second position is the position in the virtual surface connected to the upper flange surface where the horizontal position is consistent with the second representative position. The upper object position is the position in the upper flange surface where the horizontal position is consistent with the lower object position. The coordinate changing unit modifies the effective three-dimensional coordinate data grasped by the effective coordinate grasping unit, so that the effective three-dimensional coordinate data of the lower first position grasped 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 grasped by the effective coordinate grasping unit is consistent with the effective three-dimensional coordinate data of the upper second position; and The displacement calculation unit calculates the vertical displacement of the upper and lower object positions when they change from the open state to the fixed state, based on the difference between the vertical position shown in the effective three-dimensional coordinate data of the upper object position after coordinate change and the vertical position shown in the effective three-dimensional coordinate data of the lower object position after coordinate change. The effective coordinate control unit includes: A primary processing unit uses measured three-dimensional coordinate data from multiple locations on the lower flange surface to determine effective three-dimensional coordinate data for the lower edge first position, lower edge second position, and lower object position. It also uses measured three-dimensional coordinate data from multiple locations on the upper flange surface to determine effective three-dimensional coordinate data for the upper edge first position, upper edge second position, and upper object position. The lower edge first position represents the position on the lower flange surface that coincides with the boundary of the first supported portion; the lower edge second position represents the position on the lower flange surface that coincides with the boundary of the second supported portion; the upper edge first position is the position on the surface connected to the upper flange surface where its horizontal position coincides with the lower edge first position; and the upper edge second position is the position on the surface connected to the upper flange surface where its horizontal position coincides with the lower edge second position. The secondary processing unit estimates the effective three-dimensional coordinate data at the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the lower flange surface, including the lower first position and the lower second position, and estimates the effective three-dimensional coordinate data at the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data at multiple positions in the upper flange surface, including the upper first position and the upper second position.

15. The flange displacement estimation device for rotating machinery according to claim 14, wherein, The primary processing unit uses the measured three-dimensional coordinate data at multiple locations on the lower flange surface to determine the effective three-dimensional coordinate data of the position representing the lower width direction, and uses the measured three-dimensional coordinate data at multiple locations on the upper flange surface to determine the effective three-dimensional coordinate data of the position representing the upper width direction. The position representing the lower width direction is a predetermined position in the axial direction of the lower flange surface and the center position in the flange width direction. The position representing the upper width direction is a position in the upper flange surface whose horizontal position coincides with the position representing the lower width direction. The secondary processing unit estimates the effective three-dimensional coordinate data at the lower first position and the lower second position based on the variation trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the position represented by the lower width direction, and estimates the effective three-dimensional coordinate data at the upper first position and the upper second position based on the variation trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the position represented by the upper width direction.

16. The flange displacement estimation device for rotating machinery according to claim 14, wherein, The secondary processing unit estimates the effective three-dimensional coordinate data at the lower first position and the lower second position based on the changing trend of the effective three-dimensional coordinate data at the lower first position, the lower second position, and the lower object position, and estimates the effective three-dimensional coordinate data at the upper first position and the upper second position based on the changing trend of the effective three-dimensional coordinate data at the upper first position, the upper second position, and the upper object position.

17. The flange displacement estimation device for rotating machinery according to any one of claims 14 to 16, wherein, The displacement calculation unit sets half of the difference as the displacement of the upper object position and the displacement of the lower object position.

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