Method of assembling a rotary machine and assembly jig for a rotary machine

Abstract

To provide a method for assembling a rotary machine and a jig for assembling a rotary machine, which can shorten a time required for assembling the rotary machine.SOLUTION: A method for assembling a rotary machine is for the rotary machine that includes a first annular member, a second annular member provided adjacent to the first annular member in the axial direction, and a seal part provided on an axial end surface of the first annular member. The method comprises a step of, in a state in which the second annular member is arranged such that the first annular member and the second annular member are adjacent to each other in the axial direction, rotating the second annular member around the rotation axis of the rotary machine and inserting the second annular member into a casing, while pressing the seal part toward the first annular member with a jig attached to the circumferential end surface of the second annular member.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present disclosure relates to a method for assembling a rotary machine and an assembly jig for a rotary machine. [Background technology]

[0002] Jigs are sometimes used in the assembly of rotating machinery.

[0003] For example, Patent Document 1 discloses a method for assembling a shaft seal to a steam turbine (rotary machine) using a jig. In the method described in Patent Document 1, the seal plate that constitutes the shaft seal is inserted circumferentially into a groove in the lower half housing of the shaft seal, and the seal plate is installed by using a jig to move the seal plate radially inward until it contacts the rotor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-140873 Summary of the Invention [Problem to be solved by the invention]

[0005] When assembling a rotary machine including a component with a seal member on its axial end face, an adjacent component may be installed in the axial direction. In this case, simply lowering the adjacent component from above with the upper half of the casing open may not be sufficient to lower it to the desired position due to interference with other components. In this case, proper assembly of the adjacent component requires disassembly, such as removing the interfering component, which takes time. While it may be possible to install the adjacent component by rotating it circumferentially into the lower half of the casing with the upper half of the casing open, this approach can prevent the adjacent component from being easily caught by the seal member.

[0006] In view of the above circumstances, an object of at least one embodiment of the present invention is to provide a method for assembling a rotary machine and an assembly jig for a rotary machine that can reduce the time required for assembling the rotary machine. [Means for solving the problem]

[0007] A method for assembling a rotary machine according to at least one embodiment of the present invention includes the steps of: A method for assembling a rotary machine including a first annular member, a second annular member provided adjacent to the first annular member in an axial direction, and a seal portion provided on an axial end surface of the first annular member, a step of inserting the second annular member into a casing by rotating the second annular member around the rotation axis of the rotary machine while pressing the seal portion toward the first annular member with a jig attached to a circumferential end face of the second annular member, with the second annular member being arranged so that the first annular member and the second annular member are adjacent to each other in the axial direction; Equipped with.

[0008] Moreover, an assembly jig for a rotary machine according to at least one embodiment of the present invention includes: A jig used in assembling a rotary machine including a first annular member and a second annular member provided adjacent to the first annular member in an axial direction, a first surface provided to face the axial end surface of the first annular member; a second surface provided to face the circumferential end surface of the second annular member and connected to an end of the first surface, The first surface includes an inclined surface that inclines away from the axial end surface of the first annular member as the distance from the connection position with the second surface increases. [Effects of the Invention]

[0009] According to at least one embodiment of the present invention, there are provided a method for assembling a rotary machine and an assembly jig for the rotary machine that can reduce the time required for assembling the rotary machine. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic configuration diagram of a gas turbine, which is an example of a rotary machine according to an embodiment. [Figure 2] FIG. 2 is a partial schematic view of the lower half of the compressor of the gas turbine shown in FIG. 1. [Figure 3] 1 is a view of a portion of a rotary machine according to an embodiment, viewed from an axial direction; [Figure 4] 1 is a view of a portion of a rotary machine according to an embodiment, viewed from an axial direction; [Figure 5] 1 is a view of a portion of a rotary machine according to an embodiment, viewed from an axial direction; [Figure 6] 1 is a diagram illustrating a portion of a rotary machine according to an embodiment, together with an assembly jig according to an embodiment. [Figure 7] 1 is a diagram illustrating a portion of a rotary machine according to an embodiment, together with an assembly jig according to an embodiment. [Figure 8] 1 is a diagram illustrating a portion of a rotary machine according to an embodiment, together with an assembly jig according to an embodiment. [Figure 9] FIG. 7 is a view taken along the arrow AA in FIG. 6. [Figure 10] FIG. 7 is a view taken along the arrow BB in FIG. 6. [Figure 11] 1 is a flowchart of a method for assembling a rotary machine according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, several embodiments of the present invention 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 invention.

[0012] (Configuration of rotating machines) First, a gas turbine, which is an example of a rotary machine to which an assembly method and an assembly jig according to some embodiments can be applied, will be described. Fig. 1 is a schematic configuration diagram of a gas turbine, which is an example of a rotary machine according to one embodiment.

[0013] 1, a gas turbine 1, which is a rotary machine 100, includes a compressor 2 for generating compressed air, a combustor 4 for generating combustion gas using the compressed air and fuel, and a turbine 6 configured to be rotationally driven by the combustion gas. In the case of a gas turbine 1 for power generation, a generator (not shown) is connected to the turbine 6.

[0014] The compressor 2 includes a plurality of stator vanes 16 fixed to the compressor casing 10 side, and a plurality of moving blades 18 implanted in the rotor 8 so as to be arranged alternately with respect to the stator vanes 16. Air taken in from an air intake 12 is sent to the compressor 2, and this air is compressed as it passes through the plurality of stator vanes 16 and the plurality of moving blades 18, becoming high-temperature, high-pressure compressed air. The rotor 8 is configured to rotate around a rotation axis O.

[0015] The combustor 4 is supplied with fuel and compressed air generated by the compressor 2, and the fuel and compressed air are mixed and combusted in the combustor 4 to generate combustion gas, which is the working fluid of the turbine 6. As shown in Fig. 1, a plurality of combustors 4 may be arranged in the casing 20 along the circumferential direction around the rotor.

[0016] The turbine 6 has a combustion gas flow path 28 formed in the turbine casing 22 and includes a plurality of stator vanes 24 and rotor blades 26 provided in the combustion gas flow path 28. The stator vanes 24 are fixed to the turbine casing 22 side, and the plurality of stator vanes 24 arranged along the circumferential direction of the rotor 8 constitute a stator vane row. The rotor blades 26 are implanted in the rotor 8, and the plurality of rotor blades 26 arranged along the circumferential direction of the rotor 8 constitute a rotor blade row. The stator vane rows and rotor blade rows are arranged alternately in the axial direction of the rotor 8.

[0017] In the turbine 6, the combustion gas from the combustor 4 flows into a combustion gas flow path 28 and passes through the plurality of stator vanes 24 and the plurality of rotor blades 26, thereby driving the rotor 8 to rotate, which in turn drives a generator connected to the rotor 8 to generate electricity. After driving the turbine 6, the combustion gas is discharged to the outside via an exhaust chamber 30.

[0018] Fig. 2 is a partial schematic view of the lower half of the compressor 2 of the gas turbine shown in Fig. 1. Note that in Fig. 2, the compressor rotor and rotor blades are not shown.

[0019] As shown in FIG. 2 , the compressor 2 of the gas turbine 1 includes a stator vane retaining ring 38 for retaining the stator vanes 16, an inner member 34 and an outer member 32 that form a diffuser passage 31 to which air that has passed through the blade row of the compressor 2 is guided, and a space forming member 36 that forms a space 35 to which air from the diffuser passage 31 is introduced. The diffuser passage 31 is formed between the outer peripheral surface of the inner member 34 and the inner peripheral surface of the outer member 32. The inner member 34 and the outer member 32 are each connected to the space forming member 36 by bolts or the like. The stator vane retaining ring 38, the inner member 34, the outer member 32, and the space forming member 36 are each supported by the compressor casing 10. Note that FIG. 2 shows a lower half 38B of the stator vane retaining ring 38, a lower half 34B of the inner member 34, a lower half 32B of the outer member 32, a lower half 36B of the space forming member 36, and a lower half 10B of the compressor casing 10.

[0020] Next, a rotating machine according to several embodiments will be described with reference to Fig. 2 and Figs. 3 to 10. Figs. 3 to 5 are views of a part of a rotating machine according to one embodiment as viewed from the axial direction. Figs. 6 to 8 are views showing a part of a rotating machine according to one embodiment together with an assembly jig according to one embodiment. Fig. 9 is a view taken along the arrow AA in Fig. 6. Fig. 10 is a view taken along the arrow BB in Fig. 6. Figs. 3 to 10 are views showing a state in which an assembly jig according to one embodiment is in use. The casing 10 is not shown in Figs. 3 to 5. Also, the line L in Figs. 3 to 5 H indicates the horizontal dividing plane of the rotating machine.

[0021] As shown in Figures 3 to 5 and 6 to 8, the rotary machine 100 according to some embodiments includes a first annular member 40 and a second annular member 60 adjacent to each other in the axial direction of the rotary machine 100 (hereinafter simply referred to as the axial direction), and a seal portion 50.

[0022] The first annular member 40 is an annular member extending in the circumferential direction of the rotary machine 100 (hereinafter simply referred to as the circumferential direction). The first annular member 40 has an axial end face 40a, which is an end face in the axial direction. The first annular member 40 may be provided around the entire circumference of the rotation axis O of the rotary machine 100, as shown in FIGS. 3 to 5, or may be provided over an angular range less than the entire circumference. For example, the first annular member 40 may be a half-split annular member. The first annular member 40 may have an inner circumferential surface 40b extending along the circumferential direction.

[0023] The second annular member 60 is an annular member extending in the circumferential direction of the rotary machine 100 and is disposed adjacent to the first annular member 40 in the axial direction. The second annular member 60 has an axial end face 60a. When the rotary machine 100 is assembled, the first annular member 40 and the second annular member 60 are disposed such that the axial end face 40a of the first annular member 40 and the axial end face 60a of the second annular member 60 face each other. The second annular member 60 is disposed over an angular range less than the entire circumference around the rotation axis of the rotary machine 100 and has a pair of circumferential end faces 62, 64. For example, as shown in FIGS. 3 to 5 , the second annular member 60 may be a split annular member disposed over an angular range of approximately 180 degrees around the rotation axis O. The second annular member 60 may have an inner circumferential surface 60b extending along the circumferential direction.

[0024] The seal portion 50 is provided on the axial end surface 40a of the first annular member 40. The seal portion 50 is configured to suppress leakage of fluid through a gap between the first annular member 40 and the second annular member 60 in the axial direction.

[0025] 6 to 10, the seal portion 50 may be at least partially housed in a groove 46 provided in the axial end face 40a of the first annular member 40. That is, a part of the seal portion 50 may be able to protrude in the axial direction from the axial end face 40a of the first annular member 40. The groove 46 may be provided so as to be recessed from the axial end face 40a. The groove 46 may be provided so as to extend along the circumferential direction.

[0026] The seal portion 50 may be configured to be biased in the axial direction from the first annular member 40 toward the second annular member 60 by a biasing member 58. As shown in FIGS. 6 to 10 , the biasing member 58 may include an elastic member (e.g., a spring) provided between the bottom 47 of the groove 46 provided in the first annular member 40 and the divided seal member 52 (seal portion 50). The seal portion 50 may be configured so that when a force that resists the biasing force is applied to the seal portion 50, the amount of protrusion of the seal portion 50 in the axial direction decreases.

[0027] 3 to 5, the seal portion 50 may include a plurality of divided seal members 52 arranged along the circumferential direction. In this case, each of the plurality of divided seal members 52 has a pair of circumferential end faces 54, 56. Each of the plurality of divided seal members 52 may be partially housed in a groove 46 extending along the circumferential direction.

[0028] In some embodiments, the first annular member 40 is the outer member 32 (or its lower half 32B) described above that forms the diffuser passage 31 of the compressor 2 of the gas turbine 1 (rotary machine 100), and the second annular member 60 may be the lower half 38B of the stator blade retaining ring 38 of the compressor 2 of the gas turbine 1 (rotary machine 100) (see Figure 2).

[0029] (Rotating machine assembly jig and assembly method) Next, an assembly jig and an assembly method for a rotary machine 100 according to one embodiment will be described with reference to FIGS. 3 to 10 and 11. FIG. 11 is a flowchart of the assembly method for a rotary machine according to one embodiment. FIGS. 3 to 5 are diagrams for explaining the process of assembling the second annular member 60 to the rotary machine 100 according to the assembly method according to one embodiment. FIGS. 6 to 8 are diagrams for explaining the process when the jig and the circumferential end of the second annular member 60 pass through a portion of the seal portion 50 (a portion including the pair of split seal members 52A, 52B) when the second annular member 60 is rotated in step S6, which will be described later. In the assembly method described below, the second annular member 60 is assembled to the rotary machine 100 in a state in which the first annular member 40 is supported by the casing 10.

[0030] In one embodiment, first, a jig (assembly jig) 70 is attached to one of the pair of circumferential end faces 62, 64 of the second annular member 60 (S2 in FIG. 11). In step S2, the jig 70 is attached to the circumferential end face 62 of the pair of circumferential end faces 62, 64 of the second annular member 60, which is on the downstream side in the rotation direction of the second annular member 60 in step S6 described below.

[0031] Next, the second annular member 60 is arranged so that the first annular member 40 and the second annular member 60 are adjacent to each other in the axial direction (S4 in FIG. 11). In step S4, with the upper half of the casing 10 open, the second annular member 60 may be suspended above the lower half 10B of the casing 10 using a crane or the like, and the second annular member 60 may be arranged so as to be adjacent to the first annular member 40 in the axial direction.

[0032] Next, with the second annular member 60 positioned such that the first annular member 40 and the second annular member 60 are adjacent to each other in the axial direction, the second annular member 60 is rotated around the rotation axis O of the rotary machine 100 while the jig 70 presses the seal portion 50 toward the first annular member 40, and the second annular member 60 is inserted into the casing 10 (the lower half 10B of the casing 10) (S6 in FIG. 11; see FIGS. 3 to 4 and 6 to 8). In this way, the second annular member 60 is rotated into the casing 10, so that the axial end face 40a of the first annular member 40 and the axial end face 60a of the second annular member 60 face each other.

[0033] Then, with the second annular member 60 inserted into the casing 10 (or with the axial end face 40a of the first annular member 40 and the axial end face 60a of the second annular member 60 facing each other), the jig 70 is removed from the second annular member 60 (S8 in Figure 11).

[0034] When assembling a rotary machine including a component with a seal member on its axial end face, a component adjacent to the component in the axial direction may need to be assembled. In this case, simply lowering the adjacent component from above with the upper half of the casing 10 open may not be enough to lower the component to the desired position due to interference with other components. In this case, proper assembly of the adjacent component requires disassembly, such as removing the interfering component, which takes time.

[0035] For example, in the example of the compressor 2 of the gas turbine 1 (rotary machine 100) described above, when assembling the gas turbine 1, when the second annular member 60 adjacent to the first annular member in the axial direction is to be attached, if the second annular member 60 is lowered from above with the upper half of the casing 10 open, the second annular member 60 cannot be lowered to a predetermined position due to interference with the inner member 34 that forms the diffuser passage 31. In this case, in order to properly assemble the second annular member 60, disassembly work is required to remove the inner member 34, which takes time.

[0036] It is also conceivable to assemble the adjacent member by turning it circumferentially into the lower half 10B of the casing 10 while the upper half of the casing 10 is open, but in this case, the adjacent member would get caught on the seal member and would not be able to be easily turned in. For example, in the case of the compressor 2 of the gas turbine 1 described above, if the second annular member 60 is turned in the circumferential direction without the jig 70 attached, the circumferential end face 62 of the second annular member 60 would come into contact with and get caught on the circumferential end face 54 of the split seal member 52, preventing the second annular member 60 from being smoothly turned into the casing 10 (see FIG. 6).

[0037] In this regard, according to the method of the above-described embodiment, the second annular member 60 is arranged so that the first annular member 40 and the second annular member 60 are adjacent to each other in the axial direction, and then the second annular member 60 is rotated around the rotation axis O of the rotary machine 100 to insert the second annular member 60 into the casing 10 while pressing the seal portion 50 provided on the axial end face 40a of the first annular member 40 toward the first annular member 40 with a jig 70 attached to the circumferential end face 62 of the second annular member 60 (see FIGS. 6 to 8 ). Therefore, the second annular member 60 can be smoothly rotated into the casing 10 while preventing the circumferential end face 64 of the second annular member 60 from getting caught on the seal portion 50. This reduces the time required to assemble the rotary machine 100.

[0038] In the above-mentioned step S6, the second annular member 60 may be rotated around the rotation axis O and inserted into the casing 10 while the jig 70 presses the seal portion 50 against the bottom 47 of the groove 46 that houses the seal portion 50.

[0039] According to the above-described method, the second annular member 60 is inserted into the casing 10 by rotating the second annular member 60 around the rotation axis O of the rotary machine 100 while pressing the seal portion 50 provided on the axial end face 40a of the first annular member 40 toward the bottom portion 47 of the groove 46 provided in the first annular member 40 with the jig 70 attached to the circumferential end face 62 of the second annular member 60. Therefore, the second annular member 60 can be smoothly rotated into the casing 10 while preventing the circumferential end face 62 of the second annular member 60 from getting caught on the seal portion 50.

[0040] In the above-mentioned step S6, the second annular member 60 may be rotated around the rotation axis O and inserted into the casing 10 while pressing the seal portion 50 with the jig 70 so that a force that resists the biasing force of the biasing member 58 for biasing the seal portion 50 is applied to the seal portion 50.

[0041] According to the above-described method, the second annular member 60 is rotated around the rotation axis O of the rotary machine 100 to insert the second annular member 60 into the casing 10 while applying a force to the seal portion 50 provided on the axial end face 40a of the first annular member 40 using a jig 70 attached to the circumferential end face 62 of the second annular member 60 against the biasing force applied to the seal portion 50. This reduces the amount of protrusion of the seal portion 50 from the axial end face 40a of the first annular member 40 at the portion pressed by the jig 70. Therefore, the second annular member can be smoothly rotated into the casing while preventing the circumferential end face 62 of the second annular member 60 from getting caught on the seal portion 50. This reduces the time required to assemble the rotary machine.

[0042] The jig 70 may have the configuration described below.

[0043] 6 to 8, for example, the jig 70 includes a jig body 72 that is provided adjacent to the second annular member 60 in the circumferential direction when attached to the second annular member 60. The jig 70 also has a first surface 76 that is provided facing the axial end surface 40a of the first annular member 40, and a second surface 74 that is provided facing the circumferential end surface 62 of the second annular member 60 and is connected to an end of the first surface 76. The first surface 76 and the second surface 74 may be surfaces of the jig body 72. The first surface 76 of the jig 70 may include an inclined surface 77 that inclines away from the axial end surface 40a of the first annular member 40 as the distance from the connection position Pc with the second surface 74 increases.

[0044] In this case, in the above-mentioned step S6, the second annular member 60 may be rotated around the rotation axis O and inserted into the casing 10 while pressing the seal portion 50 against the first annular member 40 via the inclined surface 77 of the jig 70.

[0045] In the above-described embodiment, the first surface 76 of the jig 70 includes an inclined surface 77 that inclines away from the axial end surface 40a of the first annular member 40 as the distance from a connection position Pc with the second surface 74, which is connected to the first surface 76 and faces the circumferential end surface 62 of the second annular member 60, increases. Therefore, as the second annular member 60 rotates around the rotation axis O, at a specific position in the circumferential direction (for example, the position of the circumferential end surface 54 of the split seal member 52 on the upstream side in the rotation direction of the second annular member 60 in FIGS. 6 to 8 ), the amount by which the seal portion 50 is pressed by the inclined surface 77 gradually increases, that is, the amount by which the seal portion 50 protrudes in the axial direction, pressed by the inclined surface 77, gradually decreases (see FIGS. 6 to 8 ). 6, 7, and 8, as the second annular member 60 moves in the rotational direction, the amount of pressing by the inclined surface 77 at the position of the circumferential end face 54 of the split seal member 52B gradually increases, and accordingly the amount of protrusion of the split seal member 52B at that position gradually decreases. Therefore, the second annular member 60 can be smoothly rotated into the casing 10 while more effectively preventing the circumferential end face 62 of the second annular member 60 from getting caught on the seal portion 50.

[0046] The inclined surface 77 included in the first surface 76 of the jig 70 may include at least one of a flat surface or a curved surface. In the illustrated embodiment, the first surface 76 of the jig 70 includes the inclined surface 77 extending between both ends of the first surface 76 in the circumferential direction, and the inclined surface 77 is configured as a flat surface.

[0047] 6 to 10, the jig 70 may have a protrusion 78 protruding from the second surface 74. The second annular member 60 may have a recess 66 recessed from the circumferential end face 62 and capable of receiving the protrusion 78.

[0048] In this case, in the above-mentioned step S2, the jig 70 may be attached to the second annular member 60 by inserting the convex portion 78 of the jig 70 into the concave portion 66 of the second annular member 60.

[0049] In the above-described embodiment, the jig 70 can be easily positioned relative to the second annular member 60 by inserting the convex portion 78 of the jig 70 into the concave portion 66 of the second annular member 60. Therefore, the jig 70 can be easily attached to the second annular member 60.

[0050] The jig 70 may have one or more protrusions 78. In the illustrated embodiment, the jig 70 has two protrusions 78, each of which is adapted to be received in the recess 66 of the second annular member 60.

[0051] In some embodiments, the recess 66 of the second annular member 60 may have a surface 67 that extends substantially parallel to the axial end surface 60a of the second annular member 60. The protrusion 78 of the jig 70 may have a surface 80 that corresponds to the surface 67 of the recess 66. The surface 67 and the surface 80 may be abutted against each other, thereby enabling the jig 70 to be aligned in the axial direction with respect to the second annular member 60.

[0052] According to the above configuration, the surface 80 of the convex portion 78 of the jig 70 abuts against the surface 67 of the concave portion 66 of the second annular member 60, which makes it easier to position the jig 70 relative to the second annular member 60. Therefore, the jig 70 can be easily attached to the second annular member 60.

[0053] The jig 70 may be attached to the circumferential end surface 62 of the second annular member 60 by bolts.

[0054] 6 to 10 , for example, the jig 70 may have a bolt hole 79 provided to pass through the protrusion 78. The bolt hole 79 may be provided to extend along the protruding direction of the protrusion 78 (or a direction perpendicular to the second surface 74). The jig 70 may be attached to the second annular member 60 by a bolt 82 provided to pass through the bolt hole 79. That is, the bolt 82 may be provided to pass through the protrusion 78.

[0055] As already explained, the assembly jig and assembly method according to some embodiments are applicable when the rotary machine 100 is a gas turbine 1, the first annular member 40 is the outer member 32 (or its lower half 32B) described above, and the second annular member 60 is the lower half 38B of the stator blade retaining ring 38, but the application of the assembly jig and assembly method according to the present invention is not limited to this embodiment.

[0056] For example, in some embodiments, the first annular member 40 is a casing (or a lower half thereof) that houses turbine blades, and the second annular member 60 is a lower half of a turbine blade ring. In this embodiment, the seal portion 50 is provided on an axial end surface of a radial wall that protrudes radially inward of the casing, and the radial wall (or a lower half thereof) and the lower half of the turbine blade ring are installed so as to be adjacent to each other in the axial direction. Also, in some embodiments, the first annular member 40 is a first turbine blade ring (or a lower half thereof) that supports stator blades 24 of a turbine 6 of a gas turbine 1, and the second annular member 60 is a lower half of a second turbine blade ring that is installed so as to be adjacent to the first turbine blade ring in the axial direction. In this embodiment, the seal portion 50 is provided on an axial end surface of the first turbine blade ring, and the first turbine blade ring (or a lower half thereof) and the lower half of the second turbine blade ring are installed so as to be adjacent to each other in the axial direction.

[0057] In these embodiments, if the second annular member 60 is lowered from above while the upper half of the casing is open, it cannot be lowered to the predetermined position due to interference with other components (e.g., the rotor). Therefore, in order to properly assemble the second annular member 60, disassembly work, such as removing the interfering components (e.g., the rotor), is required, which takes time. It is also possible to assemble the second annular member 60 by screwing it circumferentially into the casing while the upper half of the casing is open. However, in this case, the second annular member 60 gets caught on a seal provided on the circumferential end face of the first annular member 40, making it difficult to screw it in.

[0058] In this regard, as described above, by applying the above-described assembly jig (jig 70) or assembly method, the second annular member 60 can be smoothly rotated into the casing while preventing the circumferential end face 64 of the second annular member 60 from getting caught on the seal portion. Therefore, the time required to assemble the rotary machine 100 can be shortened.

[0059] The contents described in each of the above embodiments can be understood, for example, as follows.

[0060] (1) A method for assembling a rotary machine according to at least one embodiment of the present invention includes: A method for assembling a rotary machine (100) including a first annular member (40), a second annular member (60) provided adjacent to the first annular member in the axial direction, and a seal portion (50) provided on an axial end surface (40a) of the first annular member, comprising: a step (S6) of inserting the second annular member into the casing (10) by rotating the second annular member around the rotation axis (O) of the rotary machine while pressing the seal portion toward the first annular member with a jig (70) attached to a circumferential end face (62) of the second annular member, with the second annular member arranged so that the first annular member and the second annular member are adjacent to each other in the axial direction; Equipped with.

[0061] According to the method (1) above, with the second annular member positioned so that the first and second annular members are adjacent to each other in the axial direction, the second annular member is rotated around the rotation axis of the rotary machine to insert the second annular member into the casing while pressing the seal portion provided on the axial end surface of the first annular member toward the first annular member with a jig attached to the circumferential end surface of the second annular member. Therefore, the second annular member can be smoothly rotated into the casing while preventing the circumferential end surface of the second annular member from getting caught on the seal portion. This reduces the time required to assemble the rotary machine.

[0062] (2) In some embodiments, in the method (1), The seal portion is at least partially accommodated in a groove (46) provided in the axial end surface of the first annular member, In the inserting step, the second annular member is rotated around the rotation axis while the jig presses the seal portion toward the bottom (47) of the groove.

[0063] According to the method (2) above, the second annular member is inserted into the casing by rotating it around the rotation axis of the rotary machine while pressing the seal portion provided on the axial end face of the first annular member against the bottom of the groove provided in the first annular member with a jig attached to the circumferential end face of the second annular member. Therefore, the second annular member can be smoothly rotated into the casing while preventing the circumferential end face of the second annular member from getting caught on the seal portion. This reduces the time required to assemble the rotary machine.

[0064] (3) In some embodiments, in the method (2), the groove is provided on the axial end surface so as to extend along the circumferential direction, The seal portion includes a plurality of divided seal members (52) that are at least partially housed in the grooves and arranged along the circumferential direction.

[0065] If the seal portion is divided into multiple parts in the circumferential direction, the second annular member is likely to get caught on the seal portion when being screwed into the casing, or the number of times the second annular member gets caught on the seal portion increases. In this regard, according to the method (3) above, the second annular member is inserted into the casing by rotating it around the rotation axis of the rotary machine while pressing the multiple divided seal members sequentially toward the first annular member with a jig attached to the circumferential end face of the second annular member. Therefore, the second annular member can be smoothly screwed into the casing while preventing the seal portion from getting caught on the circumferential end face of the second annular member. This reduces the time required to assemble the rotary machine.

[0066] (4) In some embodiments, in any of the methods (1) to (3) above, the rotary machine includes a biasing member (58) for biasing the seal portion in the axial direction from the first annular member toward the second annular member, In the inserting step, the second annular member is rotated around the rotation axis of the rotary machine while pressing the seal portion with the jig so that a force resisting the biasing force of the biasing member is applied to the seal portion.

[0067] According to the method (4) above, the second annular member is inserted into the casing by rotating it around the rotation axis of the rotary machine while applying a force to the seal provided on the axial end face of the first annular member using a jig attached to the circumferential end face of the second annular member that resists the biasing force applied to the seal. Therefore, the second annular member can be smoothly rotated into the casing while preventing the circumferential end face of the second annular member from getting caught on the seal. This reduces the time required to assemble the rotary machine.

[0068] (5) In some embodiments, in any of the methods (1) to (4) above, The jig is attached to the circumferential end surface (62) of the pair of circumferential end surfaces (62, 64) of the second annular member that is downstream in the rotation direction of the second annular member in the inserting step.

[0069] According to the method (5) above, a jig is attached to the downstream circumferential end face of the second annular member in the rotational direction. Therefore, by rotating the second annular member around the rotation axis, the second annular member moves to the position where the jig presses the seal portion. This allows the second annular member to be smoothly rotated into the casing while preventing the circumferential end face of the second annular member from getting caught on the seal portion. This reduces the time required to assemble the rotary machine.

[0070] (6) In some embodiments, in any of the methods (1) to (5) above, The jig is a first surface (76) provided to face the axial end surface of the first annular member; a second surface (74) that is provided to face the circumferential end surface of the second annular member and is connected to an end of the first surface, the first surface includes an inclined surface (77) that inclines so as to move away from the axial end surface of the first annular member as the distance from a connection position (Pc) with the second surface increases, In the inserting step, the second annular member is rotated around the rotation axis of the rotary machine while the seal portion is pressed against the first annular member via the inclined surface of the jig.

[0071] According to the method (6) above, the first surface of the jig, which is provided so as to face the axial end surface of the first annular member, includes an inclined surface that is connected to the first surface and that inclines away from the axial end surface of the first annular member as the distance from the connection position with the second surface facing the circumferential end surface of the second annular member increases. This makes it possible to more effectively prevent the circumferential end surface of the second annular member from getting caught in the seal portion, while smoothly inserting the second annular member into the casing. This reduces the time required to assemble the rotary machine.

[0072] (7) In some embodiments, in any of the methods (1) to (6) above, The jig is a second surface (74) provided to face the circumferential end surface of the second annular member; a protrusion (78) protruding from the second surface, the second annular member has a recess (66) recessed from the circumferential end surface and capable of receiving the protrusion, The method comprises: The method includes a step (S2) of inserting the convex portion into the concave portion to attach the jig to the second annular member.

[0073] According to the method (7) above, the jig has a convex portion protruding from a second surface facing the circumferential end face of the second annular member, and the circumferential end face of the second annular member has a concave portion capable of receiving the convex portion. Therefore, by inserting the convex portion of the jig into the concave portion of the second annular member, it is easy to position the jig relative to the second annular member. Therefore, the jig can be easily attached to the second annular member.

[0074] (8) In some embodiments, in the method of (7), In the attaching step, the jig is attached to the second annular member using a bolt (82) that passes through the protrusion.

[0075] According to the method (8) above, the jig can be easily attached to the second annular member using a bolt that passes through the convex portion.

[0076] (9) In some embodiments, in any of the methods (1) to (8) above, The method further comprises a step (S8) of removing the jig from the second annular member in a state where the second annular member is inserted into the casing by performing the inserting step.

[0077] According to the method (9) above, the second annular member to which the jig is attached is rotated into the casing, and then the jig is removed from the second annular member, thereby reducing the time required to assemble the rotary machine.

[0078] (10) At least one embodiment of the present invention provides a rotary machine assembly jig (70), A jig used in assembling a rotary machine (100) including a first annular member (40) and a second annular member (60) provided adjacent to the first annular member in the axial direction, a first surface (76) provided to face the axial end surface 40a of the first annular member; a second surface (74) provided to face the circumferential end surface (62) of the second annular member and connected to an end of the first surface, The first surface includes an inclined surface (77) that inclines away from the axial end surface of the first annular member as the distance from the connection position with the second surface increases.

[0079] According to the above configuration (10), the first surface of the jig, which is provided so as to face the axial end surface of the first annular member, includes an inclined surface that is connected to the first surface and that inclines away from the axial end surface of the first annular member as the distance from the connection position with the second surface facing the circumferential end surface of the second annular member increases. Therefore, by rotating the second annular member around the rotation axis of the rotary machine in a state where the first annular member and the second annular member are arranged adjacent to each other in the axial direction, the second annular member can be smoothly rotated into the casing while preventing the circumferential end surface of the second annular member from getting caught in the seal portion. This reduces the time required for assembling the rotary machine.

[0080] (11) In some embodiments, in the configuration of (10), The assembly jig is A protrusion (78) protrudes from the second surface and is configured to be received in a recess (66) recessed from the circumferential end surface of the second annular member.

[0081] According to the above configuration (11), the jig protrudes from the second surface facing the circumferential end face of the second annular member and can be received in a recess provided in the circumferential end face of the second annular member. Therefore, by inserting the protrusion of the jig into the recess of the second annular member, it is easy to position the jig relative to the second annular member. Therefore, the jig can be easily attached to the second annular member.

[0082] (12) In some embodiments, in the configuration of (11), The assembly jig is A bolt hole (79) is provided so as to pass through the protrusion.

[0083] According to the above configuration (12), the jig has a bolt hole provided so as to pass through the convex portion, so that the jig can be easily attached to the second annular member using a bolt passing through the convex portion.

[0084] The above describes an embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and also includes forms in which the above-described embodiment is modified, or forms in which these forms are appropriately combined.

[0085] In this specification, 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 strictly, 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. Furthermore, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent rectangular shapes or cylindrical shapes 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. Furthermore, in this specification, the expressions "comprise," "include," or "have" a component are not exclusive expressions that exclude the presence of other components. [Explanation of symbols]

[0086] 1. Gas turbine 2 Compressor 4 Combustor 6 Turbine 8 rotors 10 Casing (compressor casing) 10B lower half 12 Air intake 16 Stator blade 18 Moving blade 20 Casing 22 Turbine casing 24 Stator blade 26 Moving blade 28 Combustion gas flow path 30 Exhaust chamber 31 Diffuser passage 32 Outer member 32B lower half 34 Inner member 34B lower half 35 Space 36 Space forming member 36B lower half 38 Stator blade retaining ring 38B lower half 40 First annular member 40a Axial end face 40b Inner surface 46 Groove 47 Bottom 50 Seal part 52 Split seal member 52A Split seal member 52B Split seal member 54 Circumferential end face 56 Circumferential end face 58 biasing member 60 Second annular member 60a Axial end face 60b Inner surface 62 Circumferential end face 64 Circumferential end face 66 Recess 67 sides 70 Jig 72 Jig body 74 2nd page 76 Page 1 77 Slope 78 Convex 79 bolt holes 80 sides 82 volts 100 Rotating Machinery O Rotation axis PC connection position

Claims

1. A method for assembling a rotary machine including a first annular member, a second annular member provided adjacent to the first annular member in an axial direction, and a seal portion provided on an axial end surface of the first annular member, a step of inserting the second annular member into a casing by rotating the second annular member around the rotation axis of the rotary machine while pressing the seal portion toward the first annular member with a jig attached to a circumferential end surface of the second annular member, with the second annular member being arranged so that the first annular member and the second annular member are adjacent to each other in the axial direction; A method for assembling a rotating machine comprising:

2. the seal portion is at least partially accommodated in a groove provided in the axial end surface of the first annular member, In the inserting step, the second annular member is rotated around the rotation axis while the jig presses the seal portion toward the bottom of the groove. The method for assembling a rotary machine according to claim 1 .

3. the groove is provided on the axial end surface so as to extend along the circumferential direction, The seal portion includes a plurality of divided seal members that are at least partially housed in the grooves and are arranged along the circumferential direction. The method for assembling a rotary machine according to claim 2.

4. the rotary machine includes a biasing member that biases the seal portion in a direction from the first annular member toward the second annular member in the axial direction, In the inserting step, the second annular member is rotated around the rotation axis of the rotary machine while pressing the seal portion with the jig so that a force resisting the biasing force of the biasing member is applied to the seal portion. A method for assembling a rotary machine according to any one of claims 1 to 3.

5. The jig is attached to one of a pair of circumferential end surfaces of the second annular member that is downstream in a rotation direction of the second annular member in the inserting step. A method for assembling a rotary machine according to any one of claims 1 to 3.

6. The jig is a first surface provided to face the axial end surface of the first annular member; a second surface provided to face the circumferential end surface of the second annular member and connected to an end of the first surface, the first surface includes an inclined surface that inclines so as to move away from the axial end surface of the first annular member as the distance from the connection position with the second surface increases, In the inserting step, the second annular member is rotated around the rotation axis of the rotary machine while the seal portion is pressed against the first annular member via the inclined surface of the jig. A method for assembling a rotary machine according to any one of claims 1 to 3.

7. The jig is a second surface provided to face the circumferential end surface of the second annular member; a protrusion protruding from the second surface, the second annular member has a recess recessed from the circumferential end surface and capable of receiving the protrusion, and a step of attaching the jig to the second annular member by inserting the protrusion into the recess. A method for assembling a rotary machine according to any one of claims 1 to 3.

8. In the attaching step, the jig is attached to the second annular member using a bolt that passes through the protrusion. The method for assembling a rotary machine according to claim 7.

9. and a step of removing the jig from the second annular member in a state where the second annular member is inserted into the casing by performing the inserting step. A method for assembling a rotary machine according to any one of claims 1 to 3.

10. A jig used in assembling a rotary machine including a first annular member and a second annular member provided adjacent to the first annular member in an axial direction, a first surface provided opposite to an axial end surface of the first annular member; a second surface provided to face a circumferential end surface of the second annular member and connected to an end of the first surface, The first surface includes an inclined surface that inclines so as to move away from the axial end surface of the first annular member as the distance from the connection position with the second surface increases. A jig for assembling rotating machinery.

11. a protrusion projecting from the second surface and configured to be received in a recess recessed from the circumferential end surface of the second annular member; The assembly jig for a rotary machine according to claim 10.

12. A bolt hole is provided so as to penetrate the protrusion. The assembly jig for a rotary machine according to claim 11.

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