A tooling for inertia friction welding of a gas turbine compressor drum

Abstract

The present invention provides a tooling for inertia friction welding of a gas turbine compressor drum, which can not only ensure the coaxiality of workpieces when used for friction welding the compressor drum disc, but also provide elastic constraints during the friction welding process, reduce excessive stress caused by rigid constraints during welding, resulting in deformation or wear of the drum disc, and at the same time can also provide elastic constraints to the compressor drum disc. It includes a fixed-end tooling and a rotating-end tooling. The fixed-end tooling includes a cylindrical adjusting block, a roller collar, a sleeve one, and an elastic bushing; an annular cone sleeve one is abutted against the end of the elastic bushing, and the inner wall of the cone sleeve one has a conical surface which fits with the conical surface of the outer wall of the elastic sleeve one; the rotating-end tooling includes a sleeve two; an annular cone sleeve two is installed inside the sleeve two, and the inner wall of the cone sleeve one has a conical surface which fits with the conical surface of the outer wall of the elastic sleeve two; the rotating-end tooling also includes a disc center deformation constraint device.

Description

Technical Field

[0001] The present invention relates to the technical field of friction welding, and specifically to a tooling for inertia friction welding of a compressor drum of a gas turbine. Background Art

[0002] The inertia friction welding process is a solid-state joining method that can meet all the technical and economic index requirements of aircraft engine rotor drums. It is an ideal and reliable joining method, and with the application of new materials, its advantages are more obvious compared to traditional fusion welding processes. Western advanced industrial countries attach great importance to the development and application of friction welding processes and spare no expense in research and development. Some experts predict that with the pursuit of performance improvement, weight reduction, and cost reduction in engine design, most of the rotating components of engine disks and rings will adopt the inertia friction welding joining process, and inertia friction welding will become the dominant welding process for engine load-bearing rotating components.

[0003] The main material of the compressor drum is the superalloy GH4169, which is formed by welding multiple drum disks together. Its yield strength can reach over 1000 MPa at 650°C. During inertia friction welding, the drum disks to be welded are respectively installed in the fixed-end tooling and the rotating-end tooling. Then, the rotating-end drives the drum disk inside it to rotate, and the fixed-end drives the drum disk inside it to move until they come into contact and generate heat through friction. Under the action of the upsetting force, the drum disks are welded together. For example, as Figure 1 、 Figure 2 shown, it is a schematic diagram and a cross-sectional view of the welding of a 9-stage drum disk a and an 8-stage drum disk b. Among them, the welding position of the 9-stage drum disk a and the 8-stage drum disk b is at A. The 9-stage drum disk at the end of the drum has a stepped contour. During welding, the 9-stage drum disk is first fixed at the fixed end, and the 8-stage drum disk is fixed at the rotating end. After welding, the integrated 8-9 stage drum disk is fixed at the fixed end, and the 7-stage drum disk is fixed at the rotating end to continue the friction welding operation.

[0004] In actual processing, it is not only necessary to ensure that the drum disks fixed in the rotating-end tooling and the drum disks fixed in the fixed-end tooling meet the coaxiality requirements. At the same time, since the welding specimen rotates from more than one hundred revolutions per minute to stopping and completing welding in just a few seconds, a huge torque will be generated. At this time, if a rigid constraint is used to directly clamp the drum disk in the welding tooling, it may cause large deformation or wear at the disk center; moreover, under the welding upsetting force of up to hundreds of tons, large welding stresses will be generated, and the compressor drum disk will have disk center deformation after inertia friction welding, that is, the disk center of the cylindrical compressor drum disk will bend axially towards the compressor drum disk, and the cross-section is in the shape of an "eight". The more serious the deformation, the more difficult it is to repair, and even the workpiece may be scrapped. Summary of the Invention

[0005] When friction welding a compressor drum disc, it is necessary to ensure the coaxiality of the tooling. Using rigid clamping for the drum disc may cause large deformation or wear at the disc center. Also, under the upsetting force of inertia friction welding, the compressor drum disc will deform after welding. The present invention provides a tooling for inertia friction welding of a gas turbine compressor drum, which can not only ensure the coaxiality of the workpiece when used for friction welding the compressor drum disc, but also provide elastic restraint during the friction welding process, reducing excessive stress caused by rigid restraint during welding, resulting in deformation or wear of the drum disc. At the same time, it can also provide elastic restraint to the compressor drum disc to achieve the effect of reducing the deformation of the disc center.

[0006] Its technical solution is as follows: A tooling for inertia friction welding of a gas turbine compressor drum, which includes a fixed-end tooling and a rotating-end tooling. It is characterized in that: the fixed-end tooling includes a cylindrical adjusting block, and a roller collar is connected to the end of the cylindrical adjusting block. The center of the roller collar and the center of the drum disc at the fixed end are on the same axis. A sleeve one is fixedly connected to the inner wall of the cylindrical adjusting block. An annular elastic collet is installed in the sleeve one. The elastic collet is used to clamp the drum disc at the fixed end. A plurality of through holes penetrating to the rear end of the elastic collet are evenly arranged along the circumferential direction at the front end of the elastic collet. Each through hole is connected to one end of a shrinkage slot. The shrinkage slot extends along the radial direction of the elastic collet, and the other end of the shrinkage slot extends to the outer wall or the inner wall of the elastic collet. An annular cone sleeve one abuts against the end of the elastic collet. The inner wall of the cone sleeve one has a conical surface that fits with the conical surface on the outer wall of the elastic sleeve one. The outer diameter of the conical surface on the outer wall of the elastic sleeve one gradually decreases in the direction away from the welding surface. The elastic sleeve one has an elastic part one that can shrink inward or expand outward. The elastic part one presses on the outer circumference of the stepped drum disc at the end of the compressor drum and abuts against its end. The fixed-end tooling also includes a disc center auxiliary support device located in the middle of the drum disc.

[0007] The rotating end tooling includes a second sleeve. The center of the second sleeve and the center of the drum disc of the rotating end are located on the same axis. When the drum disc of the rotating end contacts the drum disc of the fixed end, the second sleeve is located within the roller collar and the center of the roller collar and the center of the second sleeve are located on the same axis. An annular tapered sleeve II is installed inside the second sleeve. The inner wall of the tapered sleeve II has a tapered surface that fits with the tapered surface of the outer wall of the elastic sleeve II. The outer diameter of the tapered surface of the outer wall of the elastic sleeve II gradually decreases in the direction away from the welding surface. The elastic sleeve II has an elastic part II that can contract inward or expand outward, and the elastic part II presses on the outer periphery of the drum disc. The rotating end tooling further includes a disc center deformation constraint device. The disc center deformation constraint device includes a support block and a stop block. A spring is installed on the support block. One end of the stop block contacts the spring, and the other end is used to fit with the center of the drum disc of the rotating end. When the drum disc is not subjected to upsetting force, there is an elastic gap between the stop block and the support block. When the drum disc is subjected to upsetting force, the stop block can provide elastic support within the elastic gap stroke.

[0008] It is further characterized in that:

[0009] The cylindrical adjustment block of the fixed end tooling is also connected with a sleeve spacer through a stud. An anti-torsion key is provided between the sleeve spacer and the cylindrical adjustment block. The sleeve spacer and the first sleeve are connected through a stud. An anti-torsion key is provided between the cylindrical adjustment block and the first sleeve. An anti-torsion key is installed between the elastic sleeve I and the tapered sleeve I. Each stage of the drum disc at the fixed end is respectively provided with an elastic collet. The fixed end tooling further includes a plurality of gaskets for installation between the tapered sleeve I and the sleeve spacer. Anti-torsion keys are installed between the tapered sleeve I and the gaskets, between each gasket, and between the gasket and the sleeve spacer respectively. Anti-torsion keys are installed between the second sleeve and the tapered sleeve II, and between the tapered sleeve II and the elastic sleeve II of the rotating end tooling respectively.

[0010] The shrinkage seams connecting two adjacent through holes on the elastic collet extend in different directions respectively.

[0011] The other end of the shrinkage seam partially extending to the outer wall of the elastic collet is provided with an installation groove and a wedge-shaped groove. The installation groove is located at the front end of the wedge-shaped groove. The wedge-shaped groove gradually widens from front to back. A connecting block is installed in the installation groove. The width of the connecting block is greater than the width of the front end of the wedge-shaped groove. A wedge-shaped block that gradually widens from front to back is installed in the wedge-shaped groove. The width of the front end of the wedge-shaped block is greater than the width of the front end of the wedge-shaped groove. There is a certain distance between the wedge-shaped block and the connecting block, and the wedge-shaped block and the connecting block are connected by bolts.

[0012] The gear block is connected to the support block through a stop sleeve and a connecting bolt. The gear block is evenly provided with a stepped connecting hole one that penetrates from the front end to the rear end. The stop sleeve is cylindrical and has a convex portion that expands outward at its front end. The convex portion is located at the front end of the step surface of the stepped connecting hole one. The rear end of the stop sleeve contacts the support block. When the step surface of the stepped connecting hole one contacts the convex portion of the stop sleeve, there is a certain gap between the rear end of the gear block and the front end of the support block;

[0013] The stop sleeve is also provided with a stepped connecting hole two that penetrates from the front end to the rear end. The head of the connecting bolt is pressed on the step surface of the stepped connecting hole two, and the rod portion is threadedly connected to the stop sleeve and the support block respectively;

[0014] The front end of the support block is also connected with a positioning block one. The positioning block one is located in the positioning hole on the inner side of the drum disc at the rotating end, and the diameter of the positioning block one corresponds to the diameter of the positioning hole;

[0015] The disc center auxiliary support device includes a positioning block two. The positioning block two is located in the positioning hole on the inner side of the drum disc at the fixed end, and the diameter of the positioning block two corresponds to the diameter of the positioning hole.

[0016] The beneficial effects of the present invention are as follows: 1. The setting of the roller collar can ensure the coaxiality requirement of the fixed-end tooling and the rotating-end tooling and the welding accuracy by embedding the sleeve two of the rotating-end tooling into the roller collar during the friction welding process;

[0017] 2. The fixed-end tooling and the rotating-end tooling respectively adopt a tapered sleeve and an elastic sleeve that matches its tapered surface. Under the upsetting force generated by the friction welding, the elastic part of the elastic sleeve can contract to further clamp the drum disc, preventing the drum disc from shifting, thereby ensuring the welding accuracy;

[0018] 3. An elastic bushing is installed at the drum disc of the fixed end. In the cases of large upsetting force, large inertia, high rotational speed, rapid stop of rotation, and vibration caused by inertial friction welding, it can rely on the deformation of the through holes and shrinkage seams provided on the elastic bushing to buffer, thereby reducing the deformation or wear of the drum disc;

[0019] 4. By supporting the drum disc at the rotating end with a disc center deformation constraint device, during the inertial friction welding process, the gear block fits with the disc center of the drum disc, and always gives an elastic support to the disc center of the drum disc. Without generating excessive stress due to rigid constraints, the purpose of reducing the welding deformation of the disc center is achieved. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of welding a 9-level drum disc and an 8-level drum disc together;

[0021] Figure 2 is Figure 1 a sectional view;

[0022] Figure 3 is a schematic sectional view of the tooling during the welding of the 9 - stage drum disk and the 8 - stage drum disk;

[0023] Figure 4 is a three - dimensional schematic view of the tooling during the welding of the 9 - stage drum disk and the 8 - stage drum disk;

[0024] Figure 5 is Figure 3 the enlarged schematic view at position B in

[0025] Figure 6 is a three - dimensional perspective schematic view of the elastic bushing;

[0026] Figure 7 is a side view of the elastic bushing;

[0027] Figure 8 is a schematic view of the structure of the elastic sleeve;

[0028] Figure 9 is Figure 3 the enlarged schematic view at position C in

[0029] Figure 10 is an exploded view of the disk - center deformation constraint device;

[0030] Figure 11 is a schematic sectional view of the disk - center deformation constraint device;

[0031] Figure 12 is Figure 11 the enlarged schematic view at position D in

[0032] Figure 13 is a partial sectional view during the welding of the 4 - stage drum disk and the 5 - 9 - stage drum disk. Specific embodiments

[0033] As Figure 3 , Figure 4 shown, a tooling for inertia friction welding of a gas turbine compressor drum includes a fixed - end tooling 100 and a rotating - end tooling 200. The fixed - end tooling 100 includes a cylindrical adjusting block 101. A roller collar 102 is connected to the end of the cylindrical adjusting block 101. Rollers extending to its inner wall are installed on the roller sleeve 102. Combining Figure 5 , the center of the roller collar 102 coincides with the drum disk at the fixed end ( Figure 3It means that the centers of the 9 - stage drum discs a) of the middle finger are located on the same axis. A sleeve one 103 is fixedly connected to the inner wall of the cylindrical adjustment block 101. An annular elastic jacket 104 is installed inside the sleeve one 103. The elastic jacket 104 is used to clamp the drum disc at the fixed end. Combining Figure 6 , Figure 7 , the elastic jacket 104 is annular. A plurality of through - holes 1041 penetrating to the rear end of the elastic jacket are evenly arranged along the circumferential direction at its front end. Each through - hole 1041 is connected to one end of a shrinkage seam 1042. The shrinkage seam 1042 extends along the radial direction of the elastic jacket 104. The other end of the shrinkage seam 1042 extends to the outer wall or the inner wall of the elastic jacket 104. At the same time, the elastic jacket is provided with a chamfer 1043 to facilitate the insertion of a drum disc with an outer diameter equal to its inner diameter; An annular cone sleeve one 105 abuts against the end of the elastic jacket 104. The inner wall of the cone sleeve one 105 has a conical surface which fits with the conical surface of the outer wall of the elastic sleeve one 106. Combining Figure 8 as shown, the outer diameter of the conical surface of the outer wall of the elastic sleeve one 106 gradually decreases in the direction away from the welding surface. The elastic sleeve one 106 has an elastic part one 1061 that can contract inward or expand outward. The elastic part one 1061 is composed of a plurality of elastic pieces. The elastic part one 1061 presses on the outer circumference of the stepped drum disc (i.e., the 9 - stage drum disc a) at the end of the compressor drum and abuts against its end (see the direction of the bold arrow in Figure 5 ). In this way, when subjected to upsetting force, the elastic part one 1061 can contract under the action of the inclined plane to clamp the workpiece circumferentially. The fixed - end tooling 100 further includes a disc - center auxiliary support device 107 located in the middle of the drum disc. It does not rigidly constrain the disc center, but provides appropriate support to prevent excessive deformation. The disc - center auxiliary support device 107 specifically includes a positioning block two 1071. The positioning block two 1071 is located in the positioning hole on the inner side of the drum disc at the fixed end, and the diameter of the positioning block two corresponds to the diameter of the positioning hole. The rear end of the disc - center auxiliary support device 107 is connected to the rear - end cover plate 1011 of the cylindrical adjustment block 101.

[0034] Specifically, the shrinkage seams 1042 connecting two adjacent through holes 1041 on the elastic jacket 104 extend in different directions. This distribution form can keep the elastic margin of the jacket. At the other end of some shrinkage seams extending to the outer wall of the elastic jacket 104, there are an installation groove 1044 and a wedge-shaped groove 1045. The installation groove 1044 is located at the front end of the wedge-shaped groove 1045. The wedge-shaped groove 1045 gradually widens from front to back. A connecting block 1046 is installed in the installation groove 1044. The width of the connecting block 1046 is greater than the width of the front end of the wedge-shaped groove 1045. A wedge-shaped block 1047 that gradually widens from front to back is installed in the wedge-shaped groove 1045. The width of the front end of the wedge-shaped block 1047 is greater than the width of the front end of the wedge-shaped groove 1045. There is a certain distance between the wedge-shaped block 1047 and the connecting block 1046, and the wedge-shaped block and the connecting block are connected by bolts. During installation, the elastic jacket is clamped on the compressor drum disc of the gas turbine. Using a torque wrench (set torque), the bolts connecting the wedge-shaped block and the connecting block are tightened until it can no longer be turned. In this way, in the cases of large upsetting force, large inertia, high rotational speed, rapid stop of rotation, and vibration caused by inertia friction welding, it can rely on the deformation of the through holes and shrinkage seams provided on the elastic jacket for buffering, thereby reducing the deformation or wear of the drum disc.

[0035] As Figure 3 、 Figure 4 、 Figure 9 shown, the rotating end tooling 200 includes a second sleeve 201. The center of the second sleeve 201 and the center of the drum disc at the rotating end ( Figure 3 which refers to the 8th-stage drum disc b) are located on the same axis. When the drum disc at the rotating end contacts the drum disc at the fixed end, the second sleeve 201 is located inside the roller collar 102, and the center of the roller collar 102 and the center of the second sleeve 201 are located on the same axis. In this way, the coaxiality of the fixed end tooling and the rotating end tooling can be ensured through the roller collar, and at the same time, the rollers can rotate with the rotating end tooling during the friction welding process. Similar to the structure and function of the first tapered sleeve 105 and the first elastic sleeve 106 in the fixed end tooling, an annular second tapered sleeve 202 is installed inside the second sleeve 201. The inner wall of the second tapered sleeve 202 has a tapered surface that fits with the tapered surface on the outer wall of the second elastic sleeve 203. The outer diameter of the tapered surface on the outer wall of the second elastic sleeve 203 gradually decreases in the direction away from the welding surface. The second elastic sleeve 203 has an elastic part two that can contract inward or expand outward. The elastic part two presses on the outer circumference of the drum disc, so that it can promote the elastic part two to squeeze the workpiece when receiving the upsetting force during the friction welding process.

[0036] Combined with Figure 10 、 Figure 11 、 Figure 12As shown in the figure, the rotating end tooling 200 further includes a disk center deformation constraint device 204. The disk center deformation constraint device 204 includes a support block 2041 and a blocking block 2042. A spring 2043 is installed on the support block 2041. One end of the blocking block 2042 contacts the spring 2043, and the other end is used to fit with the disk center of the drum disk at the rotating end. When the drum disk is not subjected to upsetting force, there is an elastic gap E between the blocking block 2042 and the support block 2041. When the drum disk is subjected to upsetting force, the blocking block 2042 can provide elastic support within the elastic gap stroke.

[0037] Specifically, the blocking block 2042 is connected to the support block 2041 through a stop sleeve 2044 and a connecting bolt 2045. The blocking block 2042 is evenly provided with a stepped connecting hole one that penetrates from the front end to the rear end. The stop sleeve 2044 is cylindrical and has a bulge 2046 that expands outward at its front end. The bulge 2046 is located at the front end of the step surface of the stepped connecting hole one. The rear end of the stop sleeve 2044 contacts the support block 2041. When the step surface of the stepped connecting hole one contacts the bulge of the stop sleeve, there is a certain gap E between the rear end of the blocking block and the front end of the support block. The blocking block 2042 and the stop sleeve 2044 can slide relative to each other. The setting of the stop sleeve can limit the width of the elastic gap E, and the bulge 2046 can prevent the blocking block 2042 from moving forward further; a stepped connecting hole two that penetrates from the front end to the rear end is also provided in the middle of the stop sleeve 2044. The head 2047 of the connecting bolt 2045 is pressed on the step surface of the stepped connecting hole two, and the rod portion 2048 is threadedly connected to the stop sleeve and the support block respectively; a positioning block one 2049 is also connected to the front end of the support block 2041. The positioning block one is located in the positioning hole on the inner side of the drum disk at the rotating end, and the diameter of the positioning block one corresponds to the diameter of the positioning hole. Therefore, when installing, the drum disk can be directly sleeved on the positioning block 2049 for positioning.

[0038] The use of the disk center deformation constraint device can provide dynamic elastic constraints during inertia friction welding, avoiding excessive angular deformation of the disk center during welding; specifically, after inertia friction welding is completed, the disk center always deforms to both sides, showing an "eight" shape. In this solution, an elastic blocking block with an outer contour consistent with the disk center is additionally clamped at the rotating end during inertia friction welding. Its elastic principle is to design a series of spring supports behind the blocking block to form elasticity; during the inertia friction welding process, the elastic blocking block fits with the disk center, always giving the disk center an elastic support, and achieving the purpose of reducing the welding deformation of the disk center while avoiding excessive stress caused by rigid constraints.

[0039] In addition, in combination with Figure 3 、 Figure 13, the cylindrical adjusting block 101 of the fixed-end tooling 100 is also connected with a sleeve spacer 108 through a stud. An anti-torsion key is provided between the sleeve spacer 108 and the cylindrical adjusting block 101. The sleeve spacer 108 and the first sleeve 103 are connected through a stud. An anti-torsion key is provided between the cylindrical adjusting block 101 and the first sleeve 103. An anti-torsion key is installed between the elastic first sleeve 106 and the first taper sleeve 105. The anti-torsion key can prevent the spontaneous rotation of each component; an elastic bushing 104 is respectively installed for each stage of drum disc at the fixed end. Combined with Figure 5 As shown, the fixed-end tooling further includes a plurality of gaskets 109 for installation between the first taper sleeve 105 and the sleeve spacer 108. Anti-torsion keys are respectively installed between the first taper sleeve 105 and the gasket 109, between each gasket 109, and between the gasket 109 and the sleeve spacer 108. The space for the drum disc can be created by removing the gaskets; anti-torsion keys are respectively installed between the second sleeve 201 and the second taper sleeve 202, and between the second taper sleeve 202 and the elastic second sleeve 203 of the rotating-end tooling 200. A large number of anti-torsion key grooves are designed in the connection of the tooling components for overconstrained anti-torsion connection to ensure the anti-torsion of the tooling under the condition of high upsetting force and high rotational speed during welding.

[0040] When using this tooling for inertia friction welding of the high-temperature alloy disc of the gas turbine compressor drum, the following steps are included: Step 1, component preparation: All non-elastic tooling parts are made of quenched and tempered 42CrMo material with a hardness value of HB280 - 320. The elastic parts use quenched and tempered 20CrMo material with a surface nitriding of 0.5 mm and a hardness ≥ HB350 after nitriding; the non-elastic tooling components use quenched and tempered 42CrMo ultra-high-strength steel to ensure structural rigidity; the elastic tooling components use quenched and tempered 20CrMo alloy structural steel to reduce some strength requirements to ensure elasticity, and deep nitriding is carried out on the surface to ensure surface hardness and wear resistance; all components are subjected to multiple rough machining - stress relieving - finish machining to ensure accuracy, and the geometric tolerances are all controlled within 0.03.

[0041] Step 2, the components are subjected to three-coordinate measurement, and the key dimensions need to meet the requirements of the drawings.

[0042] Step 3: Install the cylindrical adjusting block 101 at the fixed end. During the installation process, the coaxiality can be confirmed by adjusting the wedge positioning device. The assembly constraint is completed by using the positioning block and the pull rod device. The roller collar 102 is assembled on the outside of the cylindrical adjusting block. After the assembly is completed, the accuracy is detected. A large number of grooves are symmetrically designed on the mating surface between the fixed-end cylindrical adjusting block and the equipment body, and the reference blocks are embedded and processed into a unified plane for mating. The mutually contacting reference blocks are made of two materials, wear-resistant steel and copper infiltrated alloy, to avoid the diffusion caused by long-term contact and pressure of the same material, which may affect the accuracy of the tooling. Four wedge adjusting devices are designed on the outside of the fixed-end cylindrical adjusting block to adjust the assembly deviation in the horizontal and vertical directions. Limit and fastening devices are designed around the adjusting block, and after the assembly accuracy is confirmed, the fixing and positioning are carried out. A roller collar is designed on the outside of the fixed-end cylindrical adjusting block, and 20 rigid rollers are concentrically designed inside the roller collar. When welding, the rotating-end sleeve two is embedded and assembled in the roller collar at the fixed end to perform concentric constraint on the fixed end and the rotating end, ensuring the welding accuracy.

[0043] Step 4: Connect the rotating-end stud to the sleeve two 201; keep it concentric with the cylindrical adjusting block 101 at the fixed end, and perform accuracy detection after the assembly is completed.

[0044] Step 5: Install the sleeve spacer 108 at the fixed end. The sleeve spacer 108 is connected to the cylindrical adjusting block 101 by studs, and the anti-torsion key is installed. A sleeve spacer is designed between the sleeve one at the fixed end and the cylindrical adjusting block to transmit the upsetting force to the main bearing structure at the fixed end.

[0045] Step 6: Install the sleeve one 103 at the fixed end. The sleeve one 103 is connected to the sleeve spacer 108 by studs, and the anti-torsion key is installed.

[0046] Step 7: Install 4 gaskets 109 at the fixed end in sequence by stud connection, and install the anti-torsion key between the gaskets 109.

[0047] Step 8: Install the conical sleeve one 105 at the fixed end. The conical sleeve one 105 is connected to the gasket 109 by studs, and the anti-torsion key is installed. The conical sleeve one 105 and the sleeve one 103 are assembled with expansion to ensure concentricity; install the conical sleeve two 202 at the rotating end. After the conical sleeve two 202 is assembled with the connecting collar, it is connected to the external sleeve two 201 at the rotating end by studs, and the anti-torsion key is installed.

[0048] Step 9: Install the elastic sleeves at the fixed end and the rotating end. The elastic sleeve one 106 is connected to the cylindrical adjusting block 101 by a guiding bolt; the elastic sleeve and the conical sleeve are in wedge-shaped displacement fit, and the anti-torsion key is installed between the elastic sleeve and the conical sleeve; the rotating-end elastic sleeve and the conical sleeve are in wedge-shaped displacement fit, and the anti-torsion key is installed.

[0049] Step 10: Install the disc center auxiliary support device 107 at the fixed end by bolt connection, and install the disc center deformation constraint device 204 at the rotating end by bolt connection.

[0050] Step 11. Detection of the assembly accuracy of the tooling.

[0051] Step 12. Installation of the fixed-end 9-level drum disc and the elastic bushing 104; installation of the rotating-end 8-level drum disc.

[0052] Step 13. Detection of the assembly accuracy of the 8- and 9-level drum discs.

[0053] Step 14. Inertia friction welding of the 8 / 9-level drum discs.

[0054] Step 15. Take out the 8-9 level welded component, carry out post-welding processing and detection; remove the elastic bushing, taper sleeve, elastic sleeve, and the auxiliary support at the disc center corresponding to the fixed-end 9-level drum disc, remove the first-level gasket 109, and perform the same operations as in Steps 8 to 12. Reassemble the taper sleeve, elastic sleeve, and the corresponding guiding pull rod, and the auxiliary support at the disc center for 7 / 8-level disc welding. Assemble the 8-9 level welded component at the fixed end, and assemble the 7-level disc and the auxiliary support device at the disc center at the rotating end (a set of auxiliary supports at the disc center is shared for 5-8 levels). After welding, carry out the corresponding processing and detection. Repeat the above steps until the 5-9 level discs are welded. The overall tooling design is for the multi-stage welding scheme of the compressor drum, and a multi-stage gasket support is designed. For each level of welding, a special elastic sleeve guiding pull rod and an auxiliary support device at the disc center are designed to achieve the 4-9 level welding of the drum.

[0055] Step 16. Assembly of the 4-level disc and the 5-9 level welded component: Assemble the 5-9 level welded component at the fixed end, and install the expansion restraint elastic sleeve for the 5-9 level disc; assemble the 4-level disc and the deformation restraint device at the disc center at the rotating end.

[0056] Step 17. Detection of the assembly accuracy of the 4-level disc and the 5-9 level welded component.

[0057] Step 18. Inertia friction welding, complete the inertia friction welding of the 4-9 levels of the high-pressure compressor drum of the gas turbine, and complete the relevant post-welding detection.

[0058] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those familiar with the technology within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A tooling for inertia friction welding of a gas turbine compressor drum, which comprises a fixed-end tooling and a rotating-end tooling, and is characterized in that: The fixed-end tooling includes a cylindrical adjusting block. A roller collar is connected to the end of the cylindrical adjusting block. The center of the roller collar and the center of the drum disc at the fixed end are on the same axis. A sleeve one is fixedly connected to the inner wall of the cylindrical adjusting block. An annular elastic jacket is installed in the sleeve one. The elastic jacket is used for clamping the drum disc at the fixed end. A plurality of through holes penetrating to the rear end of the elastic jacket are evenly arranged along the circumferential direction at the front end of the elastic jacket. Each through hole is connected to one end of a shrinkage seam. The shrinkage seam extends along the radial direction of the elastic jacket. The other end of the shrinkage seam extends to the outer wall or the inner wall of the elastic jacket. An annular cone sleeve one abuts against the end of the elastic jacket. The inner wall of the cone sleeve one has a conical surface which fits with the conical surface on the outer wall of the elastic sleeve one. The outer diameter of the conical surface on the outer wall of the elastic sleeve one gradually decreases in the direction away from the welding surface. The elastic sleeve one has an elastic part one that can contract inward or expand outward. The elastic part one presses on the outer periphery of the stepped drum disc at the end of the compressor drum and abuts against its end. The fixed-end tooling further includes a disc center auxiliary support device located in the middle of the drum disc. The rotating-end tooling includes a sleeve two. The center of the sleeve two and the center of the drum disc at the rotating end are on the same axis. When the drum disc at the rotating end contacts the drum disc at the fixed end, the sleeve two is located inside the roller collar and the center of the roller collar and the center of the sleeve two are on the same axis. An annular cone sleeve two is installed in the sleeve two. The inner wall of the cone sleeve two has a conical surface which fits with the conical surface on the outer wall of the elastic sleeve two. The outer diameter of the conical surface on the outer wall of the elastic sleeve two gradually decreases in the direction away from the welding surface. The elastic sleeve two has an elastic part two that can contract inward or expand outward. The elastic part two presses on the outer periphery of the drum disc. The rotating-end tooling further includes a disc center deformation constraint device. The disc center deformation constraint device includes a support block and a blocking block. A spring is installed on the support block. One end of the blocking block contacts the spring, and the other end is used to fit with the disc center of the drum disc at the rotating end. When the drum disc is not subjected to upsetting force, there is an elastic gap between the blocking block and the support block. When the drum disc is subjected to upsetting force, the blocking block can provide elastic support within the elastic gap stroke.

2. The tooling for inertia friction welding of a gas turbine compressor drum according to claim 1, characterized in that: The cylindrical adjusting block of the fixed-end tooling is also connected with a sleeve spacer through a stud. An anti-torsion key is arranged between the sleeve spacer and the cylindrical adjusting block. The sleeve spacer and the first sleeve are connected through a stud. An anti-torsion key is arranged between the cylindrical adjusting block and the first sleeve. An anti-torsion key is installed between the first elastic sleeve and the first tapered sleeve. Each drum disc at the fixed end is respectively correspondingly installed with an elastic collet. The fixed-end tooling further includes a plurality of gaskets for installation between the first tapered sleeve and the sleeve spacer. Anti-torsion keys are respectively installed between the first tapered sleeve and the gaskets, between each pair of gaskets, and between the gaskets and the sleeve spacer. Anti-torsion keys are respectively installed between the second sleeve and the second tapered sleeve, and between the second tapered sleeve and the second elastic sleeve of the rotating-end tooling.

3. The tooling for inertia friction welding of a gas turbine compressor drum according to claim 1 or 2, characterized in that: The shrinkage seams connected by two adjacent through holes on the elastic collet extend in different directions respectively.

4. The fixture for inertia friction welding of a gas turbine compressor drum according to claim 1 or 2, characterized in that: The other end of the shrinkage seam partially extending to the outer wall of the elastic collet is provided with a mounting groove and a wedge-shaped groove. The mounting groove is located at the front end of the wedge-shaped groove. The wedge-shaped groove gradually widens from front to back. A connecting block is installed in the mounting groove. The width of the connecting block is greater than the width of the front end of the wedge-shaped groove. A wedge-shaped block gradually widening from front to back is installed in the wedge-shaped groove. The width of the front end of the wedge-shaped block is greater than the width of the front end of the wedge-shaped groove. There is a certain distance between the wedge-shaped block and the connecting block and the wedge-shaped block and the connecting block are connected by a bolt.

5. The fixture for inertia friction welding of a gas turbine compressor drum according to claim 1, characterized in that: The gear block is connected with the supporting block through a stop sleeve and a connecting bolt. The gear block is evenly provided with a stepped connecting hole one penetrating from the front end to the rear end. The stop sleeve is cylindrical and its front end is provided with an outward-expanding protrusion. The protrusion is located at the front end of the step surface of the stepped connecting hole one. The rear end of the stop sleeve contacts with the supporting block. When the step surface of the stepped connecting hole one contacts with the protrusion of the stop sleeve, there is a certain gap between the rear end of the gear block and the front end of the supporting block.

6. The tooling for inertia friction welding of a gas turbine compressor drum according to claim 5, characterized in that: A stepped connecting hole two penetrating from the front end to the rear end is further opened in the middle of the stop sleeve. The head of the connecting bolt presses on the step surface of the stepped connecting hole two, and the rod part is respectively threadedly connected with the stop sleeve and the supporting block.

7. A tooling for inertia friction welding of a gas turbine compressor drum according to any one of claims 1, 2, 5, and 6, characterized in that: The front end of the supporting block is further connected with a positioning block one. The positioning block one is located in the positioning hole inside the drum disc at the rotating end, and the diameter of the positioning block one corresponds to the diameter of the positioning hole.

8. The tooling for inertia friction welding of a gas turbine compressor drum according to claim 1, characterized in that: The disc center auxiliary support device includes a positioning block two. The positioning block two is located in the positioning hole inside the drum disc at the fixed end, and the diameter of the positioning block two corresponds to the diameter of the positioning hole.

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