Method for assembling / disassembling rotary machine, and jig for inserting / removing positioning pin

Abstract

To improve workability for inserting / removing a positioning pin of a rotary machine.SOLUTION: A method for assembling / disassembling a rotary machine according to at least one embodiment of the present disclosure includes the steps of: preparing an insertion / removal jig comprising a fixed member configured to be fixed to an outside casing of a double casing, and a moving device configured to move a positioning pin in a radial direction of the double casing relative to the fixed member fixed to the outside casing; fixing the fixed member to the outside casing; and inserting / removing the positioning pin by using the moving device to move the positioning pin in the radial direction of the double casing while holding the moving device and the positioning pin with the fixed member fixed to the outside casing.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a method for disassembling and assembling a rotary machine, and a positioning pin insertion / extraction jig. [Background technology]

[0002] For example, rotary machines such as gas turbines and steam turbines are known that have a double casing, that is, an outer casing and an inner casing such as a blade ring disposed on the inner periphery of the outer casing. In such rotary machines with a double casing, a positioning pin is used to position the outer casing and the inner casing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-77803 Summary of the Invention [Problem to be solved by the invention]

[0004] As rotating machines become larger, the positioning pins also become larger and heavier, which increases the burden of inserting and removing the positioning pins, and there is a demand for improvements in workability.

[0005] In view of the above circumstances, at least one embodiment of the present disclosure aims to improve the workability of inserting and removing positioning pins in a rotary machine. [Means for solving the problem]

[0006] (1) A method for disassembling and assembling a rotary machine according to at least one embodiment of the present disclosure includes: A method for disassembling and assembling a rotary machine having a positioning pin for positioning a relative position of a double casing, comprising the steps of: a step of preparing an insertion / extraction jig including a fixing member configured to be fixable to an outer casing of the double casing, and a moving device configured to be able to move the positioning pin in a radial direction of the double casing relative to the fixing member fixed to the outer casing; securing the securing member to the outer casing; a step of inserting and removing the positioning pin by using the moving device to move the positioning pin in the radial direction of the double casing while holding the moving device and the positioning pin with the fixed member fixed to the outer casing; Equipped with.

[0007] (2) At least one embodiment of the positioning pin insertion / extraction jig of the present disclosure includes: A positioning pin insertion / removal jig used in disassembly and assembly of a rotary machine having a positioning pin for determining the relative position of a double casing, comprising: The insertion / extraction jig is a fixing member configured to be fixed to an outer casing of the double casing; a moving device configured to generate a driving force for moving the positioning pin relative to the fixed member; Equipped with The fixing member is a fixing portion that can be fixed to the outer casing; a reaction force receiving portion provided apart from the fixed portion and configured to receive a reaction force of the propulsive force generated by the moving device; a connection portion that connects the fixed portion and the reaction force receiving portion; It has. [Effects of the Invention]

[0008] According to at least one embodiment of the present disclosure, the workability of inserting and removing a positioning pin of a rotary machine can be improved. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a diagram illustrating the overall configuration of an insertion / removal jig used in a method for disassembling and assembling a rotary machine according to some embodiments. [Figure 2] FIG. 10 is a perspective view of a fixing member in the insertion / extraction jig. [Figure 3] 5A and 5B are diagrams illustrating the cross-sectional shape of a fixing member. [Figure 4A] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4B] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4C] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4D] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4E] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4F] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 4G] 10A and 10B are diagrams for explaining the installation work of the positioning pins using an insertion / removal jig. [Figure 5A] 10A and 10B are diagrams for explaining the operation of removing the positioning pin using an insertion / removal jig. [Figure 5B] 10A and 10B are diagrams for explaining the operation of removing the positioning pin using an insertion / removal jig. [Figure 5C] 10A and 10B are diagrams for explaining the operation of removing the positioning pin using an insertion / removal jig. [Figure 6A] 10 is a flowchart showing the procedure of an insertion operation process. [Figure 6B] 10 is a flowchart showing the procedure of a removal operation process. [Figure 7] FIG. 10 is a diagram for explaining another embodiment of the moving device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions that exclude the presence of other elements.

[0011] FIG. 1 is a diagram showing the overall configuration of an insertion / removal jig used in a method for disassembling and assembling a rotary machine according to some embodiments. FIG. 2 is a perspective view of a fixing member in the insertion / extraction jig. FIG. 3 is a diagram illustrating the cross-sectional shape of the fixing member. 4A to 4G are diagrams for explaining the attachment work of the positioning pins using an insertion / extraction jig. 5A to 5C are diagrams for explaining the operation of removing the positioning pin using an insertion / removal jig.

[0012] An insertion / removal jig 1 according to some embodiments is an insertion / removal jig used in a disassembly and assembly method for a rotary machine 10 (see, for example, FIG. 4A ) that has a positioning pin for positioning the relative position of the double casing. Here, the rotary machine 10 is a rotary machine with a double casing, such as a turbine or compressor in a gas turbine, a steam turbine, or the like, that has an outer casing 11 and an inner casing 15 that is arranged on the inner periphery of the outer casing 11. The inner casing 15 is a stationary member that is arranged on the inner periphery of the outer casing and around the rotor, such as a turbine blade ring or a compressor retaining ring. The positioning pin 2 is a shaft-shaped member for determining the relative positions of the outer casing 11 and the inner casing 15.

[0013] As rotating machines become larger, the positioning pins also become larger and heavier, which increases the burden of inserting and removing the positioning pins, and there is a demand for improvements in workability. Therefore, in the method of disassembling and assembling a rotary machine according to some embodiments, the positioning pin 2 is inserted into and extracted from the rotary machine 10 using the insertion / extraction jig 1 shown in FIGS.

[0014] An insertion / extraction tool 1 according to some embodiments includes a fixing member 3 and a moving device 5.

[0015] (Fixing member 3) The fixed member 3 is a member configured to be fixable to the outer casing 11, and has a fixed portion 31 that can be fixed to the outer casing 11, a reaction force receiving portion 33 that is provided at a distance from the fixed portion 31 and is configured to receive a reaction force of the propulsion force generated by the moving device 5 as described below, and a connecting portion 35 that connects the fixed portion 31 and the reaction force receiving portion 33.

[0016] The fixing portion 31 is, for example, a flange-shaped (plate-shaped) portion and has a notch 31a cut from the peripheral edge of the plate toward the inside in the extending direction of the plate. The fixing portion 31 is a flange-shaped portion that protrudes from one axial end of the connecting portion 35, which has a split cylindrical shape as will be described later, toward the outside in the radial direction of the connecting portion 35. The notch 31a is cut from the peripheral edge of the plate from the radially outer side of the connecting portion 35 toward the radially inner side. 2, the notch portions 31a are provided in, for example, two locations in the fixing portion 31, but it is preferable that the notch portions 31a be provided in at least one location. As will be described later, the notch portions 31a are for allowing the bolts 19 to be threaded into the outer casing 11 to pass through in the thickness direction of the fixing portion 31.

[0017] The reaction force receiving portion 33 is, for example, a plate-like portion having a notch 33a cut from the peripheral edge of the plate toward the inside in the extending direction of the plate. The reaction force receiving portion 33 is a plate-like portion provided radially inside the connecting portion 35 so as to cover the other axial end of the connecting portion 35, which has a split cylindrical shape as will be described later. As will be described later, the notch 33a is for allowing a shaft member 51 of the movement device 5, which will be described later, to pass through the reaction force receiving portion 33 in the thickness direction. The reaction force receiving portion 33 is provided along its thickness direction, i.e., along the axial direction of the connecting portion 35, at a distance from the fixed portion 31. The thickness direction of the reaction force receiving portion 33 and the thickness direction of the fixed portion 31 are the same, and both are oriented in the axial direction of the connecting portion 35.

[0018] The connecting portion 35 is a portion that connects the fixed portion 31 and the reaction force receiving portion 33, which are spaced apart in the plate thickness direction of the fixed portion 31 and the reaction force receiving portion 33. In the example shown in Fig. 2, the connecting portion 35 is a plate-like portion that is curved in the circumferential direction so as to correspond to a partial area of ​​the circumferential direction of a cylinder, like a half-cylinder shape.

[0019] The fixing member 3 according to some embodiments has at least one reinforcing rib 37 provided between the fixing portion 31 and the connecting portion 35. The fixing member 3 according to some embodiments has at least one reinforcing rib 38 provided between the reaction force receiving portion 33 and the connecting portion 35.

[0020] (Moving device 5) The moving device 5 is configured to be able to move the positioning pin 2 in the radial direction of the rotor relative to the fixed member 3 fixed to the outer casing 11, i.e., is a device configured to be able to generate a propulsive force to move the positioning pin 2 relative to the fixed member 3. 1 and 3, the moving device 5 has a shaft-shaped member 51 provided with a male threaded portion 53 having a male thread formed in at least a partial area in the extension direction thereof, and at least one nut 55 that can be threaded onto the male thread. In the example shown in FIGS. 1 and 3, two nuts 55 are provided.

[0021] In the example shown in Figures 1 and 3, the shaft-shaped member 51 has a male thread portion 53 from the base end 51a to the tip end 51b of the shaft-shaped member 51, but it is sufficient that the male thread portion 53 is provided at least in a part of the tip side that is screwed onto the positioning pin 2 as described below, and in the range in which the nut 55 moves to insert and remove the positioning pin 2.

[0022] Hereinafter, the insertion and extraction operation of the positioning pin 2 using the insertion and extraction jig 1 according to several embodiments will be described.

[0023] (Insertion work) 6A is a flowchart showing the steps of the insertion operation, i.e., the process of attaching the positioning pin 2 using the insertion / extraction jig 1. In the insertion operation, an operator attaches the positioning pin 2 to the outer casing 11 and the inner casing 15 in accordance with the steps shown in FIG. The installation work of the positioning pin 2 using the insertion / removal jig 1 in some embodiments includes step S1 of preparing the insertion / removal jig 1, step S3 of fixing the fixed member 3 to the outer casing 11, step S5 of installing the moving device 5 on the fixed member 3, step S7 of inserting the positioning pin 2, step S9 of removing the moving device 5 and the fixed member 3, and step S11 of attaching the cover member 14 to the outer casing 11. In the following description, for convenience, in Figures 4A to 5C, the upper side in the figure is assumed to be vertically upper and the lower side in the figure is assumed to be vertically lower, but in the disassembling and assembling methods for rotary machines according to some embodiments, the upper side in Figures 4A to 5C is not limited to being vertically upper and the lower side in the figure is vertically lower.

[0024] (Step S1: Preparing the insertion / removal jig 1) Step S1 of preparing the insertion / extraction jig 1 is a step of preparing the above-mentioned insertion / extraction jig 1 and the positioning pin 2. In step S1 of preparing the insertion / extraction jig 1, an operator carries the insertion / extraction jig 1 and the positioning pin 2 into the installation location of the rotating machine 10 to which the positioning pin 2 is to be attached.

[0025] (Step S3: Fixing the fixing member 3 to the outer casing 11) Step S3 of fixing the fixing member 3 to the outer casing 11 is a step of fixing the fixing member 3 to the outer casing 11 in order to insert the positioning pin 2 into the outer casing 11 and the inner casing 15. In step S3 of fixing the fixing member 3 to the outer casing 11, an operator temporarily fastens a bolt 19 to an internal thread portion 13 provided around a pin hole 12 provided in the outer casing 11 and configured to receive the positioning pin 2, as shown in FIG. 4A , and inserts a fixing portion 31 between the head of the bolt 19 and the outer casing 11 as shown by arrow A, thereby inserting the bolt 19 into a notch portion 31 a of the fixing portion 31. Then, the worker tightens the bolts 19 to fix the fixing member 3 to the outer casing 11 with the bolts 19 as shown in FIG. 4B.

[0026] The female thread portion 13 is a bolt hole for bolting a cover member 14 (see FIG. 4G) to the outer casing 11 to cover the positioning pin 2 and the pin hole 12 after the positioning pin 2 is attached.

[0027] (Step S5: Installing the moving device 5 on the fixed member 3) Step S5 of installing the moving device 5 on the fixed member 3 is a step of installing the moving device 5, to which the positioning pin 2 is attached, on the fixed member 3 fixed to the outer casing 11. In step S5 of installing the moving device 5 on the fixed member 3, an operator installs the moving device 5, to which the positioning pin 2 is attached, on the tip end 51b of the shaft-shaped member 51, on the fixed member 3. A female thread portion 21 that can be threadedly engaged with a male thread portion 53 formed on a tip portion 51b of the shaft-shaped member 51 is formed on a base end portion 2a of the positioning pin 2, i.e., an end portion that is located on the outside in a radial direction (hereinafter referred to as the radial direction of the rotor) about the central axis of the rotor (not shown) of the rotating machine 10 when the positioning pin 2 is inserted into the outer casing 11 and the inner casing 15 (see, for example, FIG. 4E). Therefore, by threading the male thread portion 53 formed on the tip portion 51b of the shaft-shaped member 51 into the female thread portion 21 of the positioning pin 2, the positioning pin 2 can be attached to the tip portion 51b of the shaft-shaped member 51.

[0028] In step S5 of installing the moving device 5 on the fixed member 3, the worker inserts the moving device 5, in which the positioning pin 2 is attached to the tip end 51b of the shaft-shaped member 51, into the notch 33a of the reaction force receiving portion 33 while inserting the tip end 2b of the positioning pin 2 into the pin hole 12 of the outer casing 11, as shown in FIG. 4C. At this time, as shown in FIG. 4D, of the two nuts 55 attached to the shaft-shaped member 51, the nut 55A located on the inner side in the radial direction of the rotor is positioned on the inner side in the radial direction of the rotor relative to the reaction force receiving portion 33, and the nut 55B located on the outer side in the radial direction of the rotor is positioned on the outer side in the radial direction of the rotor relative to the reaction force receiving portion 33. That is, the worker inserts the shaft-shaped member 51 into the notch 33a of the reaction force receiving portion 33 so that the two nuts 55A and 55B are positioned on one side and the other in the radial direction of the rotor, sandwiching the reaction force receiving portion 33 therebetween. It should be noted that unless nuts 55B positioned on the radially outer side of the rotor are used in the insertion operation as will be described later, it is not essential to provide nuts 55B positioned on the radially outer side of the rotor.

[0029] Thus, in the insertion operation according to some embodiments, first only the fixed member 3, which is relatively light in weight, is attached to the outer casing 11, and then the moving device 5, to which the positioning pin 2 is attached, is placed on the fixed member 3 fixed to the outer casing 11, thereby facilitating the operation of attaching the fixed member 3 to the outer casing 11. Furthermore, even if the positioning pin 2 is relatively heavy, the positioning pin 2 can be handled together with the moving device 5 separately from the fixed member 3, thereby reducing the burden on the worker.

[0030] Instead of performing step S5 of installing the moving device 5 on the fixed member 3 after performing step S3 of fixing the fixed member 3 to the outer casing 11, the following procedure may be performed. That is, before performing step S3 of fixing the fixed member 3 to the outer casing 11, the worker can temporarily fix the shaft-shaped member 51, to which the positioning pin 2 is attached, to the fixed member 3 by sandwiching the reaction force receiving portion 33 with two nuts 55A and 55B, and then attach the positioning pin 2, shaft-shaped member 51, and fixed member 3 together to the outer casing 11.

[0031] (Step S7: Inserting positioning pin 2) Step S7 of inserting the positioning pin 2 is a step of inserting the positioning pin 2 by using the moving device 5 to move the positioning pin 2 in the radial direction of the rotor while holding the moving device 5 and the positioning pin 2 with the fixed member 3 fixed to the outer casing 11. If the moving device 5 is the moving device 5 shown in FIGS. 1 and 3 , in step S7 of inserting the positioning pin 2, the worker rotates the nut 55A ( FIG. 4D ), which is located on the radially inner side of the rotor relative to the reaction force receiving portion 33, relative to the shaft-shaped member 51, thereby moving the shaft-shaped member 51 toward the radially inner side of the rotor. At this time, the movement of the nut 55A toward the radially outer side of the rotor is restricted by the reaction force receiving portion 33. Therefore, the shaft-shaped member 51 moves toward the radially inner side of the rotor together with the positioning pin 2. As the worker continues to rotate nut 55A, the positioning pin 2 attached to the tip 51b of the shaft-shaped member 51 moves through the pin hole 12 of the outer casing 11 toward the inside in the radial direction of the rotor against gravity and against the frictional forces with the pin hole 12 and the pin hole 16 of the inner casing 15. Then, as shown in FIG. 4E , the tip 2b of the positioning pin 2 is inserted into the pin hole 16 of the inner casing 15. As a result, the positioning pin 2 determines the relative positions of the outer casing 11 and the inner casing 15.

[0032] In this way, in step S7 of inserting the positioning pin 2, the moving device 5 and the positioning pin 2 are held by the fixed member 3 fixed to the outer casing 11, and the positioning pin 2 is inserted using the moving device 5. This allows the positioning pin 2 to be held by the fixing member 3 when inserting the positioning pin 2 into the outer casing 11, eliminating the need for the worker to bear the weight of the positioning pin 2. This improves the workability of inserting the positioning pin 2.

[0033] In addition, in step S7 of inserting the positioning pin 2, the reaction force caused by the radial thrust force of the rotor generated by the moving device 5 is received by the reaction force receiving portion 33, and the positioning pin 2 is moved radially of the rotor by the thrust force. This allows the positioning pin 2 to be inserted easily.

[0034] In some embodiments of the insertion / removal jig 1, the moving device 5 is detachable from the positioning pin 2 and has an axial member provided with a male threaded portion 53 having a male thread formed in at least a partial area, and at least one nut 55 that can be screwed onto the male threaded portion. This makes it possible to improve the workability of inserting the positioning pin 2 with a relatively simple configuration.

[0035] (Step S9: Removing the moving device 5 and the fixed member 3) Step S9 of removing the moving device 5 and the fixed member 3 is a step of removing the moving device 5 and the fixed member 3 from the outer casing 11 after the positioning pin 2 has been attached by performing step S7 of inserting the positioning pin 2. In step S9 of removing the moving device 5 and the fixed member 3, the worker releases the screw engagement between the positioning pin 2 and the shaft-shaped member 51 and removes the shaft-shaped member 51 from the positioning pin 2. Then, the worker pulls out the shaft-shaped member 51 from the cutout portion 33a of the reaction force receiving portion 33. The worker then loosens the bolts 19 and removes the fixing member 3 from the outer casing 11 . As a result, the moving device 5 and the fixed member 3 are removed from the outer casing 11, as shown in FIG. 4F.

[0036] In addition, the worker may temporarily fix the shaft-shaped member 51 to the fixed member 3 by clamping the reaction force receiving portion 33 with two nuts 55A, 55B, and then remove the shaft-shaped member 51 and the fixed member 3 together from the outer casing 11.

[0037] (Step S11: Attaching the cover member 14 to the outer casing 11) Step S11 of attaching the cover member 14 to the outer casing 11 is a step of attaching the cover member 14 to the outer casing 11 to cover the positioning pins 2 and the pin holes 12. In step S11 of attaching the cover member 14 to the outer casing 11, after the shaft-shaped member 51 and the fixed member 3 have been removed by performing step S9 of removing the moving device 5 and the fixed member 3, the worker covers the positioning pins 2 and the pin holes 12 with the cover member 14 and fixes the cover member 14 to the outer casing 11 with bolts 19 as shown in FIG. 4G.

[0038] This completes the insertion process.

[0039] (Removal work) 6B is a flowchart showing the procedure for the extraction work, i.e., the processing procedure for removing the positioning pin 2 using the insertion / extraction jig 1. In the extraction work, an operator removes the positioning pin 2 from the outer casing 11 and the inner casing 15 in accordance with the procedure shown in FIG. The removal work of the positioning pin 2 using the insertion / removal tool 1 in some embodiments includes step S21 of preparing the insertion / removal tool 1, step S23 of removing the cover member 14 from the outer casing 11, step S25 of fixing the fixing member 3 to the outer casing 11, step S27 of attaching the moving device 5 to the positioning pin 2, step S29 of removing the positioning pin 2, step S31 of fixing the moving device 5 to the fixing member 3, and step S33 of removing the fixing member 3 from the outer casing 11.

[0040] (Step S21: Preparing the insertion / extraction jig 1) Step S21 of preparing the insertion / extraction jig 1 is a step of preparing the above-mentioned insertion / extraction jig 1. In step S21 of preparing the insertion / extraction jig 1, an operator carries the insertion / extraction jig 1 into the installation location of the rotating machine 10 from which the positioning pin 2 is to be removed.

[0041] (Step S23: Removing the cover member 14 from the outer casing 11) Step S23 of removing the cover member 14 from the outer casing 11 is a step of removing the cover member 14 covering the positioning pin 2 to be removed from the outer casing 11. In step S23 of removing the cover member 14 from the outer casing 11, the worker removes the bolts 19 that secure the cover member 14 covering the positioning pin 2 to be removed, and removes the cover member 14 from the outer casing 11. Either step S21 of preparing the insertion / extraction jig 1 or step S23 of removing the cover member 14 from the outer casing 11 may be performed first, and these steps may be performed in parallel by a plurality of workers.

[0042] (Step S25: Fixing the fixing member 3 to the outer casing 11) Step S25 of fixing the fixing member 3 to the outer casing 11 is a step of fixing the fixing member 3 to the outer casing 11 in order to remove the positioning pin 2 from the outer casing 11 and the inner casing 15. In step S25 of fixing the fixing member 3 to the outer casing 11, the worker fixes the fixing member 3 to the outer casing 11 in the same manner as step S3 of fixing the fixing member 3 to the outer casing 11 in the above-mentioned insertion work.

[0043] (Step S27: Attaching the moving device 5 to the positioning pin 2) Step S27 of attaching the moving device 5 to the positioning pin 2 is a step of attaching the moving device 5 to the positioning pin 2 attached to the outer casing 11 and the inner casing 15. In step S27 of attaching the moving device 5 to the positioning pin 2, as shown in FIG. 5A , an operator inserts the shaft-shaped member 51 into the notch 33a of the reaction force receiving portion 33 and attaches the positioning pin 2 to the tip end 51b of the shaft-shaped member 51 by screwing the female thread portion 21 of the positioning pin 2 with the male thread portion 53 formed on the tip end 51b of the shaft-shaped member 51. At this time, as shown in FIG. 5A , of the two nuts 55 attached to the shaft-shaped member 51, nut 55A located on the inner side in the radial direction of the rotor is positioned on the inner side in the radial direction of the rotor with respect to the reaction force receiving portion 33, and nut 55B located on the outer side in the radial direction of the rotor is positioned on the outer side in the radial direction of the rotor with respect to the reaction force receiving portion 33.

[0044] In addition, to prevent the nut 55A located on the radially inner side of the rotor from interfering with the reaction force receiving portion 33 when the positioning pin 2 is subsequently removed, it is advisable to position the nut 55A located on the radially inner side of the rotor as far away from the reaction force receiving portion 33 as possible toward the radially inner side as shown in Figure 5A. Furthermore, unless nuts 55A positioned on the radially inner side of the rotor are used in the insertion and removal operation as will be described later, it is not essential to provide nuts 55A positioned on the radially inner side of the rotor.

[0045] (Step S29: Removing the positioning pin 2) Step S29 of removing the positioning pin 2 is a step of removing the positioning pin 2 by using the moving device 5 to move the positioning pin 2 in the radial direction of the rotor while holding the moving device 5 and the positioning pin 2 with the fixed member 3 fixed to the outer casing 11. If the moving device 5 is the moving device 5 shown in FIGS. 1 and 3 , in step S29 of removing the positioning pin 2, the worker rotates the nut 55B, which is located on the radially outer side of the rotor relative to the reaction force receiving portion 33, relative to the shaft-shaped member 51, thereby moving the shaft-shaped member 51 radially outward of the rotor. At this time, the movement of the nut 55B radially inward of the rotor is restricted by the reaction force receiving portion 33. Therefore, the shaft-shaped member 51 moves radially outward together with the positioning pin 2. As the worker continues to rotate the nut 55A, the positioning pin 2 attached to the tip 51b of the shaft-shaped member 51 moves through the pin hole 12 of the outer casing 11 and the pin hole 16 of the inner casing 15 toward the outside in the radial direction of the rotor, resisting the frictional forces with the pin hole 12 and the pin hole 16 of the inner casing 15. Thereafter, the positioning pin 2 is also extracted from the pin hole 12 of the outer casing 11, as shown in FIG. 5B. In this state, the moving device 5 and the positioning pin 2 are held against gravity by the fixing member 3 fixed to the outer casing 11. In this way, since the positioning pin 2 can be held by the fixing member 3 when removing the positioning pin 2 from the outer casing 11, the worker does not have to bear the weight of the positioning pin 2. This improves the workability of removing the positioning pin 2.

[0046] In some embodiments of the insertion / removal jig 1, the moving device 5 is detachable from the positioning pin 2 and has an axial member provided with a male threaded portion 53 having a male thread formed in at least a partial area, and at least one nut 55 that can be screwed onto the male threaded portion. This makes it possible to improve the workability of removing the positioning pin 2 with a relatively simple configuration.

[0047] In addition, in step S29 of removing the positioning pin 2, the reaction force caused by the radial thrust force of the rotor generated by the moving device 5 is received by the reaction force receiving portion 33, and the positioning pin 2 is moved radially of the rotor by the thrust force. This allows the positioning pin 2 to be easily removed.

[0048] (Step S31: Fixing the moving device 5 to the fixed member 3) Step S31 of fixing the moving device 5 to the fixed member 3 is a step of fixing the moving device 5 with the positioning pin 2 attached to the fixed member 3 after step S29 of removing the positioning pin 2 is performed. In step S31 of fixing the moving device 5 with the positioning pin 2 attached to the fixed member 3, the worker temporarily fixes the shaft-shaped member 51 with the positioning pin 2 attached to the fixed member 3 so as to sandwich the reaction force receiving portion 33 with two nuts 55A and 55B.

[0049] (Step S33: Removing the fixing member 3 from the outer casing 11) Step S33 of removing the fixing member 3 from the outer casing 11 is a step of removing from the outer casing 11 the fixing member 3 to which the moving device 5 is fixed in step S31 of fixing the moving device 5 to the fixing member 3. In step S33 of removing the fixing member 3 from the outer casing 11, the worker removes from the outer casing 11 the fixing member 3 to which the moving device 5 with the positioning pin 2 attached is temporarily fixed. That is, the worker removes the bolt 19 that fixes the fixing member 3 to the outer casing 11, thereby removing the positioning pin 2, the moving device 5, and the fixing member 3 together from the outer casing 11 as shown in FIG. 5C . In this way, when removing the positioning pin 2, the positioning pin 2, the moving device 5, and the fixed member 3 can be removed together from the outer casing 11, improving the efficiency of the removal work.

[0050] This completes the removal operation.

[0051] Instead of performing step S31 of fixing the moving device 5 to the fixed member 3, the moving device 5 to which the positioning pin 2 is attached may be removed from the fixed member 3 after performing step S29 of removing the positioning pin 2. In this case, it is only necessary to remove only the fixed member 3 from the outer casing 11 thereafter.

[0052] (Other embodiments of the moving device 5) The above-described moving device 5 is configured to generate a driving force for moving the positioning pin 2 by utilizing the relative movement between the male thread portion 53 of the shaft-shaped member 51 and the nut 55. 7 is a diagram illustrating another embodiment of the moving device 5. In the example shown in Fig. 7, the moving device 5 has, for example, a screw jack 57 and a male screw member 59 attached to the tip of a rod 58 of the screw jack 57. The male screw member 59 is configured to be able to be screwed into the female screw portion 21 of the positioning pin 2 . The moving device 5 shown in FIG. 7 is configured to generate a driving force for moving the positioning pin 2 by driving a screw jack 57, instead of rotating the nut 55 relative to the shaft-shaped member 51.

[0053] When using the screw jack 57, a thrust force can be generated both radially outside and radially inside the rotor. Therefore, when removing the positioning pin 2, the screw jack 57 should be positioned radially outside the rotor relative to the reaction force receiving portion 33 as shown in FIG. 7, and when inserting the positioning pin 2, it should be positioned radially inside the rotor. If the screw jack 57 is fixed to the reaction force receiving portion 33, the screw jack 57 may be fixed to the outer side of the rotor in the radial direction relative to the reaction force receiving portion 33, or may be fixed to the inner side of the rotor in the radial direction.

[0054] In another embodiment of the moving device 5, a screw jack 57 is used to generate a propulsive force for moving the positioning pin 2, but other types of devices capable of generating a propulsive force for moving the positioning pin 2, such as a hydraulic jack, may also be used in addition to the screw jack 57.

[0055] As described above, the insertion / extraction jig 1 according to some embodiments includes the fixed member 3 and the moving device 5. The fixed member 3 has the fixed portion 31, the reaction force receiving portion 33, and the connecting portion . This allows the positioning pin 2 to be held by the fixing member 3 when inserting or removing the positioning pin 2 into or from the outer casing 11, eliminating the need for the worker to bear the weight of the positioning pin 2. This improves the workability of inserting or removing the positioning pin 2.

[0056] The present disclosure is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0057] The contents described in each of the above embodiments can be understood, for example, as follows. (1) A method for disassembling and assembling a rotary machine according to at least one embodiment of the present disclosure is a method for disassembling and assembling a rotary machine 10 that includes a positioning pin 2 for determining the relative position of a double casing (outer casing 11, inner casing 15). The method for disassembling and assembling a rotary machine according to at least one embodiment of the present disclosure includes steps S1 and S21 of preparing an insertion / extraction jig 1 that includes a fixed member 3 configured to be fixable to the outer casing 11 of the double casings (outer casing 11, inner casing 15) and a moving device 5 configured to be able to move the positioning pin 2 in a radial direction of the double casing (radial direction of the rotor) relative to the fixed member 3 fixed to the outer casing 11; steps S3 and S25 of fixing the fixed member 3 to the outer casing 11; and steps S7 and S29 of inserting and extracting the positioning pin 2 by using the moving device 5 to move the positioning pin 2 in the radial direction of the double casing (radial direction of the rotor) while holding the moving device 5 and the positioning pin 2 with the fixed member 3 fixed to the outer casing 11.

[0058] According to the method (1) above, the positioning pin 2 can be held by the fixing member 3 when inserting or removing the positioning pin 2 into or from the outer casing 11, so the worker does not have to bear the weight of the positioning pin 2. This improves the workability of inserting or removing the positioning pin 2.

[0059] (2) In some embodiments, the method of (1) above may include step S31 of fixing the moving device 5 having the positioning pin 2 attached to the fixed member 3, and step S33 of removing the fixed member 3 to which the moving device 5 has been fixed in fixing step S31 from the outer casing 11.

[0060] According to the method (2) above, when removing the positioning pin 2, the positioning pin 2, the moving device 5, and the fixed member 3 can be removed together from the outer casing 11, improving the efficiency of the removal work.

[0061] (3) In some embodiments, the method (1) or (2) above may include a step S5 of installing the moving device 5 with the positioning pin 2 attached to a fixed member 3 fixed to the outer casing 11.

[0062] According to the method (3) above, first, only the fixed member 3, which is relatively light in weight, is attached to the outer casing 11, and then the moving device 5, to which the positioning pin 2 is attached, is placed on the fixed member 3 fixed to the outer casing 11, which makes it easier to attach the fixed member 3 to the outer casing 11. Furthermore, even if the positioning pin 2 is relatively heavy, the positioning pin 2 can be handled together with the moving device 5 separately from the fixed member 3, thereby reducing the burden on the worker.

[0063] (4) In some embodiments, in any of the methods (1) to (3) above, the fixing member 3 may have a fixing portion 31 that can be fixed to the outer casing 11, and a reaction force receiving portion 33 that is provided so as to be positioned outward of the fixing portion 31 in the radial direction of the double casing (radial direction of the rotor) when the fixing portion 31 is fixed to the outer casing 11. In steps S7 and S29 of inserting and removing the positioning pin 2, the reaction force caused by the propulsive force in the radial direction of the double casing (radial direction of the rotor) generated by the moving device 5 is received by the reaction force receiving portion 33, so that the positioning pin 2 is moved in the radial direction of the double casing (radial direction of the rotor) by the propulsive force.

[0064] According to the method (4) above, the positioning pin 2 can be easily inserted and removed.

[0065] (5) A positioning pin insertion / extraction jig 1 according to at least one embodiment of the present disclosure is a positioning pin 2 insertion / extraction jig 1 used for disassembling and assembling a rotary machine 10 that includes a positioning pin 2 for determining the relative position of a double casing (an outer casing 11 and an inner casing 15). The insertion / extraction jig 1 includes a fixed member 3 configured to be fixable to the outer casing 11 of the double casing (the outer casing 11 and the inner casing 15), and a moving device 5 configured to be able to generate a thrust for moving the positioning pin 2 relative to the fixed member 3. The fixed member 3 has a fixed portion 31 that can be fixed to the outer casing 11, a reaction force receiving portion 33 that is provided at a distance from the fixed portion 31 and configured to receive a reaction force of the thrust generated by the moving device 5, and a connecting portion 35 that connects the fixed portion 31 and the reaction force receiving portion 33.

[0066] According to the configuration (5) above, the positioning pin 2 can be held by the fixing member 3 when inserting or removing the positioning pin 2 into or from the outer casing 11, so that the worker does not have to bear the weight of the positioning pin 2. This improves the workability of inserting or removing the positioning pin 2.

[0067] (6) In some embodiments, in the configuration of (5) above, the moving device 5 may have an axial member 51 that is detachable from the positioning pin 2 and has a male threaded portion 53 with a male thread formed in at least a portion of the area, and at least one nut 55 that can be screwed onto the male threaded portion 53.

[0068] According to the above configuration (6), the workability of inserting and removing the positioning pin 2 can be improved with a relatively simple configuration. [Explanation of symbols]

[0069] 1 Insertion / Extraction Jig 2 Locating Pins 3 Fixing member 5. Mobile Devices 10 Rotating Machinery 11 Outer casing 15 Inner casing 31 Fixed part 33 Reaction force receiving part 35 Connection 51 Shaft-shaped member 53 Male thread 55 Nut 57 Screw jack

Claims

1. A method for disassembling and assembling a rotary machine having a positioning pin for positioning a relative position of a double casing, comprising the steps of: a step of preparing an insertion / extraction jig including a fixing member configured to be fixable to an outer casing of the double casing, and a moving device configured to be able to move the positioning pin in a radial direction of the double casing relative to the fixing member fixed to the outer casing; securing the securing member to the outer casing; a step of inserting and removing the positioning pin by using the moving device to move the positioning pin in the radial direction of the double casing while holding the moving device and the positioning pin with the fixed member fixed to the outer casing; Equipped with Disassembly and assembly method for rotating machinery.

2. a step of fixing the moving device to which the positioning pin is attached to the fixed member; removing the fixing member to which the moving device is fixed in the fixing step from the outer casing; Equipped with The method for disassembling and assembling a rotary machine according to claim 1.

3. a step of installing the moving device with the positioning pin attached to the fixed member fixed to the outer casing; Equipped with 3. The method for disassembling and assembling a rotary machine according to claim 1 or 2.

4. the fixing member has a fixing portion that can be fixed to the outer casing, and a reaction force receiving portion that is provided so as to be positioned radially outward of the double casing relative to the fixing portion when the fixing portion is fixed to the outer casing, In the step of inserting and removing the positioning pin, a reaction force caused by a thrust force in the radial direction of the double casing generated by the moving device is received by the reaction force receiving portion, and the positioning pin is moved in the radial direction of the double casing by the thrust force.

3. The method for disassembling and assembling a rotary machine according to claim 1 or 2.

5. A positioning pin insertion / removal jig used in disassembly and assembly of a rotary machine having a positioning pin for determining the relative position of a double casing, comprising: The insertion / extraction jig is a fixing member configured to be fixed to an outer casing of the double casing; a moving device configured to generate a driving force for moving the positioning pin relative to the fixed member; Equipped with The fixing member is a fixing portion that can be fixed to the outer casing; a reaction force receiving portion provided apart from the fixed portion and configured to receive a reaction force of the propulsive force generated by the moving device; a connection portion that connects the fixed portion and the reaction force receiving portion; having Positioning pin insertion / removal jig.

6. The moving device is a shaft-shaped member that is detachably attached to the positioning pin and has a male thread portion having a male thread formed in at least a partial area thereof; At least one nut that can be threaded onto the male threaded portion; having The positioning pin insertion / extraction jig according to claim 5.

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