Anti-deformation tool for welding of thin-walled piston ring support and orifice plate of gas turbine

Abstract

A deformation-resistant fixture for welding thin-walled piston ring supports to perforated plates in gas turbines includes: a base plate, with one side of the plate-shaped body serving as a support surface; multiple inner support blocks, detachably fixed to the support surface and forming a ring structure, the outer circumferential surface of the ring structure serving as an inner limiting surface; multiple pressure plates; and screws for detachably connecting the pressure plates to the plate-shaped body, the plate-shaped body having threaded holes for threaded connection with the screws. Before welding the perforated plate, the inner limiting surface is clearance-fitted with the inner hole of the shaft tube to limit deformation of the shaft tube during welding. The support surface contacts the mounting surface. The pressure plates are evenly distributed in a ring array around the central axis of the shaft tube. By adjusting the depth of the screws in the threaded holes, pressure is applied to the detection surface through the pressure plates, limiting the fixing ring between the pressure plates and the plate-shaped body while ensuring the end face runout of the detection surface meets requirements. This ensures that the flatness of the piston ring support fixing ring and the roundness of the inner hole of the shaft tube meet requirements after welding the perforated plate.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine manufacturing technology, and in particular to an anti-deformation tooling for welding thin-walled piston ring supports and orifice plates in gas turbines. Background Technology

[0002] Piston ring supports in a gas turbine, such as Figure 3 , Figure 4 As shown, it includes an annular plate-shaped fixing ring 11 and a shaft tube 12. One end of the shaft tube 12 is fixedly connected to the fixing ring 11 and is concentric. The other end of the shaft tube 12 is thickened and has an mounting groove 13 for placing the piston ring on its outer circumference. The annular plate-shaped fixing ring 11 is fixedly connected to the rear plate of the radial diffuser. The mounting surface of the fixing ring 11 is in contact with the rear plate of the diffuser. The thickened end of the shaft tube 12 abuts against the nozzle ring. The piston ring and the inner wall of the nozzle ring are sealed together to achieve a sealed connection between the radial diffuser and the nozzle ring. A perforated plate needs to be welded around the outer circumference of the shaft tube 12 of the piston ring support.

[0003] Since the thickness of the retaining ring 11 and the shaft tube 12 that needs to be assembled with the orifice plate is 4mm, the piston ring support will be twisted and deformed during the welding process of the orifice plate. The flatness of the retaining ring 11 and the roundness of the inner hole of the shaft tube 12 will change. The effect after straightening is not very obvious. As a result, after the piston ring support is installed, the inner wall of the shaft tube 12 interferes with the internal parts and affects the sealing effect of the piston ring. Utility Model Content

[0004] In response to the shortcomings of the existing production technology, the applicant provides a deformation-resistant tooling for welding thin-walled piston ring supports to orifice plates in gas turbines, thereby ensuring that the flatness of the piston ring support fixing ring and the roundness of the inner hole of the shaft tube meet the requirements after welding the orifice plate.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A deformation-resistant fixture for welding a thin-walled piston ring support to a perforated plate in a gas turbine, the piston ring support comprising a fixed ring and a shaft tube connected to the fixed ring, one side plane of the fixed ring being a mounting surface and the other side plane of the fixed ring being a detection surface, the deformation-resistant fixture comprising:

[0007] The base plate includes a plate-shaped body, wherein one surface of the plate-shaped body in the thickness direction is a support surface;

[0008] Multiple inner support blocks are detachably and fixedly installed on the support surface. The multiple inner support blocks form a ring structure. The outer peripheral surface of the ring structure is an inner limiting surface, and the inner limiting surface is a cylindrical surface.

[0009] Multiple pressure plates, each corresponding to the detection surface;

[0010] Screws, in a number matching the pressure plate, are used to detachably connect the pressure plate to the plate-shaped body, wherein the plate-shaped body is provided with threaded holes for threaded connection with the screws;

[0011] Before welding the perforated plate, the inner limiting surface is fitted with the inner hole of the shaft tube to limit the deformation of the shaft tube during welding. The supporting surface is in contact with the mounting surface. The pressure plates are evenly distributed in a ring array around the central axis of the shaft tube. The depth of the adjusting screw in the threaded hole is adjusted. Pressure is applied to the detection surface through the pressure plate. The fixing ring is limited between the pressure plate and the plate-shaped body, while the end face of the detection surface runs out of the required distance.

[0012] As a further improvement to the above technical solution:

[0013] Before welding the orifice plate, the fit clearance between the inner limiting surface and the inner hole of the shaft tube is J. After welding the orifice plate, the maximum allowable value of the roundness of the inner hole is K, (K-0.01mm) / 2≤J≤(K-0.01mm), and the roughness of the inner limiting surface is less than or equal to Ra1.6 micrometers.

[0014] The support surface has a limiting boss protruding from the support surface in the middle. After each inner support block is attached to the outer peripheral surface of the limiting boss, multiple inner support blocks form the ring structure. The outer peripheral surface of the limiting boss is a cylindrical surface.

[0015] The inner support blocks are of the same specification and number N, where 4≤N≤8. There is an assembly gap between adjacent inner support blocks. The length of the assembly gap is along the radial direction of the inner hole, and the width of the assembly gap is 0.8% to 1.5% of the diameter of the inner hole.

[0016] The diameter of the inner hole is D, the width of a single pressure plate along the circumferential direction of the fixing ring is W, 6%D≤W≤8%D, and the distance between two adjacent pressure plates is G, W≤G≤2.5W.

[0017] The pressure plate includes a block-shaped support part and a pressing part connected to the support part, and the pressing part is provided with a pressing plane corresponding to the detection surface;

[0018] The support portion is located on one side of the screw. The support portion is connected to the plate-shaped body. The plate-shaped body supports the support portion along the axial direction of the shaft tube. The screw passes through the crimping portion and is located between the support portion and the fixing ring. The depth of the screw in the threaded hole is adjusted so that the crimping plane contacts the detection surface and applies pressure to the detection surface.

[0019] An extension is fixed to the outer periphery of the plate-shaped body. The extension is annular and surrounds the outer periphery of the plate-shaped body. The extension and the plate-shaped body form an annular groove. The annular groove and the support surface form a stepped structure.

[0020] The support portion is provided with a first contact surface corresponding to the bottom plane of the annular groove. The bottom plane is in surface contact with the first contact surface and supports the support portion along the axial direction of the shaft tube.

[0021] The support portion is provided with a second contact surface, which contacts the annular wall of the annular groove on one side of the stepped structure, and limits the pressure plate along the radial direction of the shaft tube.

[0022] The annular groove is a ring centered on the central axis of the shaft tube, and the second contact surface is an arc surface that contacts the annular wall surface of the annular groove.

[0023] The length of the overlap between the crimped portion and the fixing ring along the radial direction of the fixing ring is L, and the radial width of the fixing ring is M, where 1 / 4M≤L≤1 / 3M.

[0024] The end of the crimping part facing the shaft tube has an inclined surface, which is used to avoid the welding torch used during welding.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model has a compact and reasonable structure and is easy to operate. By setting an inner support block corresponding to the inner hole of the shaft tube in the middle of the base plate, the deformation of the shaft tube during welding is restricted. Multiple pressure plates corresponding to the fixing ring are arrayed on the base plate. The end face runout of the detection surface of the fixing ring is adjusted by adjusting the pressure at multiple points with the shaft tube as the center. Before welding, the fixing ring is evenly clamped and the end face runout of the detection surface is ensured to meet the requirements. The two components, the fixing ring and the shaft tube, are limited, so that the flatness of the fixing ring of the piston ring support after welding the orifice plate and the roundness of the inner hole of the shaft tube meet the requirements.

[0027] This utility model also has the following advantages:

[0028] (1) Setting a limiting boss on the support surface to limit the inner support block along the radial direction of the ring structure can quickly realize the positioning and assembly of the ring structure, ensure the roundness of the ring structure formed by multiple inner support blocks, the number of inner support blocks is greater than or equal to 4 and less than or equal to 8, and the width of the assembly gap is 0.8% to 1.5% of the inner hole diameter, which facilitates the disassembly of a single inner support block 4 while ensuring the support effect.

[0029] (2) The diameter of the inner hole is D, the width of a single pressure plate along the circumferential direction of the fixed ring is W, 6%D≤W≤8%D, the distance between two adjacent pressure plates is G, W≤G≤2.5W, so that multiple pressure plates can effectively apply pressure to the fixed ring at multiple points, which is convenient for adjusting the runout of the end face of the detection surface.

[0030] (3) The second contact surface is set as an arc surface that contacts the annular wall surface. A single pressing part can be set relative to the diameter of a fixed ring to ensure that the pressing part of each pressing plate is consistent with the pressing position of the fixed ring, which facilitates the adjustment of the end face runout of the detection surface. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is the front view of the present invention.

[0033] Figure 3 for Figure 2 A sectional view of section AA in the middle.

[0034] Figure 4 for Figure 3 Enlarged view of section I in the middle.

[0035] Figure 5 This is an exploded view of the present invention.

[0036] Figure 6 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0037] Figure 7 This is a schematic diagram of the structure of the pressure plate of this utility model (from another perspective).

[0038] Figure 8 This is a schematic diagram of the structure of the base plate of this utility model.

[0039] in:

[0040] 1. Piston ring support; 11. Retaining ring; 111. Inspection surface; 12. Shaft tube; 13. Mounting groove;

[0041] 2. Base plate; 21. Extension; 22. Plate-shaped body; 2201. Threaded hole; 23. Limiting boss; 24. Annular groove;

[0042] 3. Pressure plate; 31. Pressing part; 311. Pressing plane; 312. Inclined surface; 32. Support part; 321. First contact surface; 322. Second contact surface;

[0043] 4. Inner support block; 41. Assembly clearance; 42. Inner limiting surface;

[0044] 5. Welded perforated plate; 6. Screws. Detailed Implementation

[0045] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0046] An exemplary embodiment illustrates a deformation-resistant tooling for welding thin-walled piston ring supports to perforated plates in gas turbines, such as... Figures 1-5 As shown, the piston ring support 1 includes a fixed ring 11 and a shaft tube 12 connected to the fixed ring 11. One side plane of the fixed ring 11 is the mounting surface, and the other side plane of the fixed ring 11 is the detection surface 111. The anti-deformation fixture includes a base plate 2, multiple inner support blocks 4, a pressure plate 3, and screws 6.

[0047] The base plate 2 includes a plate-shaped body 22, and one side surface of the plate-shaped body 22 in the thickness direction is a support surface, which is used to contact the mounting surface of the fixing ring 11 of the piston ring support 1.

[0048] Multiple inner support blocks 4 are detachably and fixedly installed on the support surface. The multiple inner support blocks 4 form a ring structure. The outer peripheral surface of the ring structure is the inner limiting surface 42, and the inner limiting surface 42 is a cylindrical surface.

[0049] The pressure plate 3 consists of multiple pieces and corresponds to the detection surface 111. The pressure plate 3 is connected to the plate-shaped body 22 to fix and limit the fixing ring 11 on the plate-shaped body 22. The pressure plate 3 has a pressing surface 311 opposite to the detection surface 111.

[0050] Screws 6, the number of which matches that of pressure plate 3, are used to detachably connect pressure plate 3 to plate-shaped body 22. Plate-shaped body 22 is provided with threaded holes 2201 that are threadedly connected to screws 6.

[0051] Before welding the perforated plate 5, the inner limiting surface 42 is fitted with the inner hole of the shaft tube 12 to limit the deformation of the shaft tube 12 during welding. The supporting surface is in contact with the mounting surface. The pressure plate 3 is evenly distributed in a ring array with the central axis of the shaft tube 12 as the center. The depth of the adjusting screw 6 in the threaded hole 2201 is adjusted. Pressure is applied to the detection surface 111 through the pressure plate 3. The fixing ring 11 is limited between the pressure plate 3 and the plate-shaped body 22, while the end face of the detection surface 111 jumps to meet the requirements.

[0052] The anti-deformation tooling for welding thin-walled piston ring supports and orifice plates for gas turbines is suitable for welding piston ring supports 1 with a diameter (i.e., the diameter of the inner hole) of 200mm-1000mm. The dimensions of the tooling need to be adjusted accordingly.

[0053] For example, in one specific implementation, such as Figure 2 The piston ring support 1 shown has a diameter of 589mm. The process of installing the piston ring support 1 on the tooling before welding is as follows:

[0054] Multiple inner support blocks 4 are fixedly installed on the support surface of the plate-shaped body 22 to ensure that the multiple inner support blocks 4 form a ring structure. The outer peripheral surface of the ring structure is the inner limiting surface 42 that is in clearance fit with the inner hole of the shaft tube 12.

[0055] The inner hole of the piston ring support 1's shaft tube 12 is fitted over the annular structure, and the mounting surface of the fixing ring 11 is made to contact the supporting surface of the plate-shaped body 22, such as... Figure 3 As shown;

[0056] Adjust the position of the pressure plate 3 so that the fixing ring 11 is located between the pressure plate 3 and the support surface, and use screws 6 to connect the pressure plate 3 to the plate-shaped body 22;

[0057] Then, after adjusting the tightening torque of each screw 6 to 50 N / m, a dial indicator is used to test the runout of the end face of the test surface 111. The tightening force of the screws 6 at different positions is adjusted according to the specific value to adjust the runout of the end face to 0.03 mm, so as to ensure the flatness of the retaining ring 11 before welding.

[0058] After the orifice plate welding is completed, the inner support block 4 and the pressure plate 3 are removed in sequence, and then the piston ring support 1 is removed. Specifically, the inner support block 4 is provided with holes for installing lifting eye bolts, which facilitates the lifting of the inner support block 4.

[0059] By setting an inner support block 4 corresponding to the inner hole of the shaft tube 12 in the middle of the base plate 2, the deformation of the shaft tube 12 during welding is restricted. Multiple pressure plates 3 corresponding to the fixing ring 11 are arrayed on the base plate 2. The end face runout of the detection surface 111 of the fixing ring 11 is adjusted by adjusting the pressure at multiple points with the shaft tube 12 as the center. Before welding, the fixing ring 11 is evenly clamped and the end face runout of the detection surface 111 is ensured to meet the requirements. The two components, the fixing ring 11 and the shaft tube 12, are limited, so that the flatness of the fixing ring 11 of the piston ring support 1 after welding the orifice plate 5 and the roundness of the inner hole of the shaft tube 12 meet the requirements.

[0060] In an exemplary embodiment, the anti-deformation tooling used for welding the thin-walled piston ring support of a gas turbine to the orifice plate has a fitting clearance dimension J between the inner limiting surface 42 and the inner hole of the shaft tube 12 before welding the orifice plate 5, in mm. The maximum allowable value of the roundness of the inner hole after welding the orifice plate 5 is K, in mm, where (K-0.01mm) / 2≤J≤(K-0.01mm). The roughness of the inner limiting surface 42 is less than or equal to Ra1.6 micrometers, ensuring smooth assembly of the shaft tube 12 and the inner support block 4 before welding, and that the inner support block 4 can better resist the deformation of the shaft tube 12 during welding.

[0061] For a piston ring support 1 with a diameter of 589 mm (i.e., the inner diameter), 0.015 mm ≤ J ≤ 0.03 mm, the roundness of the welded shaft tube 12 can be guaranteed to be within 0.04 mm, and the flatness of the retaining ring 11 can be guaranteed to be within 0.05 mm. For example... Figure 4 As shown, the arrow points to the fit clearance between the inner limiting surface 42 and the inner hole of the shaft tube 12, indicating the position of the size J of the fit clearance.

[0062] The relationship between J of piston ring support 1 with different inner diameters and the maximum allowable value K of roundness after welding is shown in Table 1 below.

[0063] Table 1

[0064]

[0065] In one exemplary embodiment, such as Figure 3 , Figure 8 As shown, a limiting boss 23 protruding from the support surface is provided in the middle of the support surface. After each inner support block 4 is attached to the outer peripheral surface of the limiting boss 23, multiple inner support blocks 4 form a ring structure. The outer peripheral surface of the limiting boss 23 is a cylindrical surface.

[0066] Specifically, multiple inner support blocks 4 are located outside the limiting boss 23, and the inner support blocks 4 are provided with annular grooves that match the limiting boss 23, such as... Figure 3 As shown, it is also possible to directly limit the ring by fitting the annular cylindrical surface with the outer peripheral surface of the limiting boss 23, which can accurately ensure the roundness of the annular structure.

[0067] Setting a limiting boss 23 on the support surface to limit the inner support block 4 along the radial direction of the annular structure can quickly realize the positioning and assembly of the annular structure and ensure the roundness of the annular structure formed by multiple inner support blocks 4.

[0068] In the previous exemplary embodiment, the inner support blocks 4 are of the same specification and there are N blocks, where 4≤N≤8. There is an assembly gap 41 between adjacent inner support blocks 4. The length of the assembly gap 41 is along the radial direction of the inner hole, and the width of the assembly gap 41 is 0.8% to 1.5% of the diameter of the inner hole.

[0069] In this embodiment, after welding, the roundness of the inner hole of the shaft tube 12 changes. The process of disassembling the piston ring support 1 is as follows:

[0070] Before welding, there is a gap between the shaft tube 12 and the inner support block 4. After welding, the gap changes due to the deformation of the shaft tube 12. Select the inner support block 4 with a larger gap between it and the inner hole of the shaft tube 12, disassemble it first, then adjust the position of the other inner support blocks 4 and disassemble the remaining inner support blocks 4 in sequence.

[0071] Then, after loosening the pressure plate 3, remove the piston ring support 1.

[0072] When the number of inner support blocks 4 is greater than or equal to 4, it is easier to find the suitable inner support block 4 to be removed first. When the number of inner support blocks 4 is more than 8, it affects the assembly efficiency. The width of the assembly gap 41 is 0.8% to 1.5% of the diameter of the inner hole, which facilitates the disassembly and assembly of the inner support blocks 4, and does not affect the supporting effect of the ring structure on the inner hole.

[0073] The number of inner support blocks 4 is greater than or equal to 4 and less than or equal to 8, and the width of the assembly gap 41 is 0.8% to 1.5% of the inner hole diameter, which facilitates the disassembly of individual inner support blocks 4 while ensuring the support effect.

[0074] In one exemplary embodiment, such as Figure 2 As shown, the diameter of the inner hole is D, the width of a single pressure plate 3 along the circumferential direction of the fixing ring 11 is W, 6%D≤W≤8%D, and the distance between two adjacent pressure plates 3 is G, W≤G≤2.5W. This allows multiple pressure plates 3 to effectively apply pressure to the fixing ring 11 at multiple points, facilitating the adjustment of the runout of the end face of the detection surface 111.

[0075] In one exemplary embodiment, such as Figures 1-7 As shown, the structure of the pressure plate 3 includes a block-shaped support part 32 and a pressing part 31 connected to the support part 32. The pressing part 31 is provided with a pressing plane 311 corresponding to the detection surface 111.

[0076] The support part 32 is located on one side of the screw 6. The support part 32 is connected to the plate-shaped body 22. The plate-shaped body 22 supports the support part 32 along the axial direction of the shaft tube 12. The screw 6 passes through the crimping part 31 and is located between the support part 32 and the retaining ring 11. The depth of the screw 6 in the threaded hole 2201 is adjusted so that the crimping plane 311 contacts the detection surface 111 and applies pressure to the detection surface 111.

[0077] Specifically, the thickness of the support part 32 is greater than the thickness of the pressing part 31, so that after the pressure plate 3 is fixed by the screw 6, one end is supported by the support surface and the other end is supported by the detection surface 111, ensuring that the pressure plate 3 can apply pressure to the fixing ring 11. Adjust the depth of the screw 6 in the threaded hole 2201, and adjust the pressing surface 311 of the pressure plate 3 to apply pressure to the detection surface 111.

[0078] In another exemplary embodiment, such as Figure 8 , Figure 4 As shown, an extension 21 is fixedly provided on the outer periphery of the plate-shaped body 22. The extension 21 is annular and surrounds the outer periphery of the plate-shaped body 22. The extension 21 and the plate-shaped body 22 form an annular groove 24. The annular groove 24 and the support surface form a stepped structure.

[0079] The support part 32 is provided with a first contact surface 321 corresponding to the bottom plane of the annular groove 24. The bottom plane is in contact with the first contact surface 321, and the support part 32 is supported along the axial direction of the shaft tube 12.

[0080] The support part 32 is provided with a second contact surface 322, which contacts the annular wall of the annular groove 24 on one side of the stepped structure and limits the pressure plate 3 along the radial direction of the shaft tube 12.

[0081] Specifically, such as Figure 8 As shown, the thickness of the support part 32 is greater than the sum of the thicknesses of the pressing part 31 and the fixing ring 11; the bottom plane of the annular groove 24 has an annular wall on one side and an open structure on the other side.

[0082] When the pressure plate 3 is installed, the second contact surface 322 contacts the annular wall of the annular groove 24 to limit the position, ensuring the positioning of the overlapping position of the pressing part 31 and the detection surface 111, which facilitates the installation of the screw 6.

[0083] In another embodiment, such as Figure 7 As shown, the annular groove 24 is a ring centered on the central axis of the shaft tube 12, and the second contact surface 322 is an arc surface, which is in contact with the annular wall surface of the annular groove 24.

[0084] The second contact surface 322 is set as an arc surface that contacts the annular wall surface. A single pressing part 31 can be set relative to the diameter of a fixed ring 11, ensuring that the pressing position of the pressing part 31 of each pressing plate 3 against the fixed ring 11 is consistent, which facilitates the adjustment of the end face runout of the detection surface 111.

[0085] In one exemplary embodiment, such as Figure 4 As shown, the length of the overlap between the crimping part 31 and the fixing ring 11 along the radial direction is L, and the radial width of the fixing ring 11 is M, where 1 / 4M ≤ L ≤ 1 / 3M. This ensures the crimping effect while avoiding interference from the welding torch and the dial indicator that detects runout on the end face. Specifically, the radial width of the fixing ring 11 refers to the radial width of the detection surface 111.

[0086] In this embodiment, as Figure 6 , Figure 7 As shown, the end of the crimping part 31 facing the shaft tube 12 is provided with a bevel 312, which is used to avoid the welding torch used during welding.

[0087] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A deformation-resistant tooling for welding a thin-walled piston ring support to a perforated plate in a gas turbine, the piston ring support (1) comprising a fixed ring (11) and a shaft tube (12) connected to the fixed ring (11), wherein one side plane of the fixed ring (11) is a mounting surface, characterized in that: The other side plane of the fixed ring (11) is the detection surface (111), and the anti-deformation tooling includes: The base plate (2) includes a plate-shaped body (22), and one side surface of the plate-shaped body (22) in the thickness direction is a support surface; Multiple inner support blocks (4) are detachably and fixedly installed on the support surface. The multiple inner support blocks (4) form a ring structure. The outer peripheral surface of the ring structure is an inner limiting surface (42), and the inner limiting surface (42) is a cylindrical surface. Pressure plates (3), in multiple pieces, corresponding to the detection surface (111); Screws (6), the number of which matches the pressure plate (3), are used to detachably connect the pressure plate (3) to the plate-shaped body (22), and the plate-shaped body (22) is provided with threaded holes (2201) that are threadedly connected to the screws (6); Before welding the perforated plate (5), the inner limiting surface (42) is fitted with the inner hole of the shaft tube (12) to limit the deformation of the shaft tube (12) during welding. The supporting surface is in contact with the mounting surface. The pressure plate (3) is evenly distributed in a ring array with the central axis of the shaft tube (12) as the center. The depth of the adjusting screw (6) in the threaded hole (2201) is adjusted. Pressure is applied to the detection surface (111) through the pressure plate (3). The fixing ring (11) is limited between the pressure plate (3) and the plate-shaped body (22) while the end face of the detection surface (111) jumps to meet the requirements.

2. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 1, characterized in that: The fit clearance between the inner limiting surface (42) and the inner hole of the shaft tube (12) before welding the hole plate (5) is J. The maximum allowable value of the roundness of the inner hole after welding the hole plate (5) is K, (K-0.01mm) / 2≤J≤(K-0.01mm). The roughness of the inner limiting surface (42) is less than or equal to Ra1.6 micrometers.

3. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 1, characterized in that: The support surface is provided with a limiting boss (23) protruding from the support surface. After each inner support block (4) is attached to the outer peripheral surface of the limiting boss (23), multiple inner support blocks (4) form the ring structure. The outer peripheral surface of the limiting boss (23) is a cylindrical surface.

4. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 3, characterized in that: The inner support blocks (4) are of the same specification and number N, where 4≤N≤8. There is an assembly gap (41) between adjacent inner support blocks (4). The length of the assembly gap (41) is along the radial direction of the inner hole, and the width of the assembly gap (41) is 0.8% to 1.5% of the diameter of the inner hole.

5. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 1, characterized in that: The diameter of the inner hole is D, the width of a single pressure plate (3) along the circumferential direction of the fixing ring (11) is W, 6%D≤W≤8%D, and the distance between two adjacent pressure plates (3) is G, W≤G≤2.5W.

6. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 1, characterized in that: The structure of the pressure plate (3) includes a block-shaped support part (32) and a pressing part (31) connected to the support part (32). The pressing part (31) is provided with a pressing plane (311) corresponding to the detection surface (111). The support part (32) is located on one side of the screw (6). The support part (32) is connected to the plate-shaped body (22). The plate-shaped body (22) supports the support part (32) along the axial direction of the shaft tube (12). The screw (6) passes through the crimping part (31) and is located between the support part (32) and the fixing ring (11). The depth of the screw (6) in the threaded hole (2201) is adjusted so that the crimping plane (311) contacts the detection surface (111) and applies pressure to the detection surface (111).

7. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 6, characterized in that: An extension (21) is fixedly provided on the outer periphery of the plate-shaped body (22). The extension (21) is annular and surrounds the outer periphery of the plate-shaped body (22). The extension (21) and the plate-shaped body (22) form an annular groove (24). The annular groove (24) and the support surface form a stepped structure. The support part (32) is provided with a first contact surface (321) corresponding to the bottom plane of the annular groove (24). The bottom plane is in contact with the first contact surface (321) and supports the support part (32) along the axial direction of the shaft tube (12). The support (32) is provided with a second contact surface (322), which contacts the annular wall of the annular groove (24) on one side of the stepped structure and limits the pressure plate (3) along the radial direction of the shaft tube (12).

8. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 7, characterized in that: The annular groove (24) is an annular shape centered on the central axis of the shaft tube (12), and the second contact surface (322) is an arc surface, which is in contact with the annular wall surface of the annular groove (24).

9. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 6, characterized in that: The length of the overlap between the crimping part (31) and the fixing ring (11) along the radial direction is L, and the radial width of the fixing ring (11) is M, where 1 / 4M≤L≤1 / 3M.

10. The anti-deformation tooling for welding thin-walled piston ring supports and perforated plates in gas turbines as described in claim 9, characterized in that: The end of the crimping part (31) facing the shaft tube (12) is provided with a bevel (312), which is used to avoid the welding torch used during welding.

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