Device for eliminating residual stress of turbine disc

Abstract

The invention provides a device for eliminating the residual stress of a turbine disc, and the device comprises a restraining part which comprises a fixed disc which is provided with a plurality of rails extending in the radial direction; the multiple moving assemblies are arranged on the rails correspondingly, extend in the direction parallel to the axial direction of the turbine disc and abut against the rim of the turbine disc; the internal expansion type clamp is in internal expansion fit with the inner diameter of the turbine disc; the driving part is connected with the internal expansion type clamp; and the control part is electrically connected with the moving assembly, and in the process that the inner diameter of the turbine disc is expanded by the internal expansion type clamp, the control part controls the moving assembly to prevent the rim of the turbine disc from deforming based on the pushing force of the rim of the turbine disc for pushing the moving assembly, and controls the driving part to drive the turbine disc to rotate so as to eliminate the residual stress of the turbine disc.

Description

Technical Field

[0001] The present disclosure relates to the technical field of turbine disk manufacturing, and in particular to a device for eliminating residual stress of a turbine disk. Background Art

[0002] As the core hot end component of aircraft engines, the forming quality and mechanical properties of turbine disk forgings are directly related to the overall efficiency and life performance of the engine. The forging process and heat treatment steps are the core links that determine the quality of turbine disk forgings. During the forging process of the turbine disk, deformation stress will be generated due to the influence of hot working. These stresses will gradually ease during the storage of the forgings, but if they are not completely eliminated, residual stress will be left in the forgings. These residual stresses have a significant impact on the machining process, such as deformation of the part size during the machining process, and failure problems such as fracture and stress fatigue of the parts during use.

[0003] However, with the improvement of machining technology, people often overlook the importance of residual stress. In fact, residual stress has a profound impact on the performance and service life of materials. If the residual stress is unevenly distributed or the value is too large, it will not only cause deviations in the geometric dimensions of the components during machining, but may also cause failure problems such as wear and fracture during the service life of the parts. Therefore, a device that can effectively eliminate the residual stress of the turbine disk is needed. Summary of the invention

[0004] In view of this, the present disclosure provides a device for eliminating residual stress of a turbine disk, characterized in that it includes: a constraint portion, including: a fixed disk, formed with a plurality of radially extending tracks; and a plurality of movable components, respectively arranged on the tracks, extending in an axial direction parallel to the turbine disk, and abutting against the rim of the turbine disk; an internal expansion clamp, which is internally expanded with the inner diameter of the turbine disk; a driving portion, connected to the internal expansion clamp; and a control portion, which is electrically connected to the movable component, and in the process of the internal expansion clamp expanding the inner diameter of the turbine disk, the control portion controls the movable component to prevent the rim of the turbine disk from being deformed based on the driving force of the rim of the turbine disk to push the movable component, and controls the driving portion to drive the turbine disk to rotate, so as to eliminate the residual stress of the turbine disk.

[0005] Optionally, the moving component includes: a support column, which is arranged on the track, electrically connected to the control unit, and extends in an axial direction parallel to the turbine disk; and a rotating wheel, which is mounted on the support column and contacts with the rim of the turbine disk, and in the process of the driving unit driving the turbine disk to rotate, the rotating wheel rotates around the central axis of the support column; in the process of the internal expansion clamp expanding the inner diameter of the turbine disk, the rim of the turbine disk pushes the rotating wheel and the support column to move along the track, and the control unit controls the moving component to prevent the rim of the turbine disk from deforming.

[0006] Optionally, the device further comprises: a flexible connection member, which is arranged between the driving part and the internal expansion clamp, so that the driving part can smoothly drive the internal expansion clamp to rotate.

[0007] Optionally, the device also includes: two limiting parts, which are respectively arranged on both sides of the turbine disc, sleeved on the internal expansion clamp, and cover the bearing hole of the turbine disc to prevent the turbine disc from tilting relative to the internal expansion clamp during the rotation of the turbine disc.

[0008] Optionally, the driving portion is arranged on a side of the internal expansion clamp opposite to the restraining portion, and the internal expansion clamp, the fixing disk and / or the turbine disk are coaxially arranged.

[0009] Optionally, the device further comprises: a mounting frame, comprising a top plate and a bottom plate, the restraining portion is mounted on the bottom plate, the side of the internal expansion clamp opposite to the driving portion is rotatably mounted on the bottom plate, and the driving portion is mounted on the top plate.

[0010] Optionally, the fixed disk further includes: an inner ring; and an outer ring, and the track extends from the outer ring to the inner ring.

[0011] Optionally, the rotating wheel is made of elastic material.

[0012] Optionally, the control unit includes: a detection unit electrically connected to the moving component and configured to detect the driving force of the rim of the turbine disk pushing the moving component; a drive control unit electrically connected to the drive unit; and a calculation unit, which calculates the residual stress of the turbine disk based on the driving force, controls the drive unit to drive the turbine disk to rotate based on the residual stress, and controls the moving component to prevent the rim of the turbine disk from deforming.

[0013] Optionally, the device further comprises: a display unit configured to display stress information of the turbine disk in real time.

[0014] According to the disclosed embodiment, by setting an internal expansion clamp, the inner diameter of the turbine disk can be expanded to make the turbine disk reach the specified size. By setting a constraint part, the driving force of the moving assembly driven by the rim of the turbine disk can be used to more accurately detect the stress information of the rim of the turbine disk to adjust the rotation information of the turbine disk and the expansion information of the inner diameter of the expanded turbine disk, and by controlling the position of the moving assembly on the track, the rim of the turbine disk can be prevented from deforming, thereby overcoming the difficulty of controlling and monitoring the residual stress of the turbine disk during the rotation process, and achieving the purpose of accurately regulating the residual stress change of the aircraft engine turbine disk during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0016] Figure 1 A partial cross-sectional view schematically shows a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure.

[0017] Figure 2 A perspective view schematically shows a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure.

[0018] Figure 3 A top view of a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure is schematically shown.

[0019] Reference numerals

[0020] A. turbine disk; 1. constraint part; 11. fixed disk; 111. track; 112. inner ring; 113. outer ring; 12. moving assembly; 121. support column; 122. rotating wheel; 5. internal expansion clamp; 3. driving part; 4. control part; 41. detection unit; 42. driving control unit; 43. computing unit; 5. flexible connector; 6. limiting part; 61. cover plate; 62. limiting plate; 63. fastening nut; 7. mounting frame; 71. top plate; 72. bottom plate; 8. display part; 9. fastening nut. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0022] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0023] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0024] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0025] Figure 1 A partial cross-sectional view of a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure is schematically shown (the turbine disk is shown). Figure 2 A perspective view of a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure is schematically shown (the turbine disk is shown, but the control portion is not shown). Figure 3 A top view of a device for eliminating residual stress of a turbine disk according to an embodiment of the present disclosure is schematically shown (a control portion is not shown).

[0026] like Figure 1-Figure 3 As shown, an embodiment of the present disclosure provides a device for eliminating residual stress of turbine disk A. The outer diameter of turbine disk A may be 500 mm to 800 mm. Turbine disk A may be made of high-temperature alloy materials such as GH4169. The device may include a constraint portion 1, an internal expansion clamp 5, a drive portion 3 and a control portion 4. The constraint portion 1 may include a fixed disk 11 and a plurality of moving components 12. The fixed disk 11 may be formed with a plurality of radially extending tracks 111. The plurality of moving components 12 may be respectively arranged on the tracks 111, extending in an axial direction parallel to the turbine disk A, and abutting against the rim of the turbine disk A. The constraint portion 1 may be coaxially arranged with the turbine disk A. As shown Figure 1-Figure 2 As shown, the fixed disk 11 can be located at the lower part of the turbine disk A (such as Figure 1As shown in the lower part of the figure, the moving assembly 12 can be located on the track 111 and abut against the rim of the turbine disc A. In the case where the rim of the turbine disc A is deformed, the rim of the turbine disc A will generate a driving force to push the moving assembly 12. Furthermore, the position of the moving assembly 12 on the track 111 can be controlled to suppress the deformation of the rim of the turbine disc A.

[0027] The internal expansion fixture 5 can be matched with the inner diameter of the turbine disc A. Bulging is a stamping process in which a high-pressure liquid or gas is passed inside the tube blank or on one side of the plate blank, or a rigid flap mold is placed to force the tube or plate to plastically deform to form a workpiece. By setting the internal expansion fixture 5, the inner diameter of the turbine disc A can be expanded to make the turbine disc A reach a specified size. In the process of the internal expansion fixture 5 expanding the inner diameter of the turbine disc A, the wheel rim of the turbine disc A can be prevented from being deformed by controlling the position of the moving component 12 on the track 111.

[0028] The driving part 3 can be connected to the internal expansion clamp 5. The driving part 3 can be used to drive the internal expansion clamp 5 to rotate, thereby driving the turbine disk A to rotate. When the internal expansion clamp 5 expands the inner diameter of the turbine disk A, the driving part 3 can drive the internal expansion clamp 5 to rotate to eliminate the residual stress of the turbine disk A.

[0029] The control unit 4 can be electrically connected to the moving assembly 12. In the process of the inner expansion clamp 5 bulging the inner diameter of the turbine disc A, the control unit 4 can control the moving assembly 12 to prevent the rim of the turbine disc A from being deformed based on the driving force of the rim of the turbine disc A to push the moving assembly 12, and control the driving unit 3 to drive the turbine disc A to rotate to eliminate the residual stress of the turbine disc A. By setting the moving assembly 12 to abut against the rim of the turbine disc A, the stress information of the rim can be detected more accurately. By setting the number of moving assemblies 12, the accuracy of the detection can be adjusted. The control unit 4 can control the position of the moving assembly 12 on the track 111 based on the driving force of the rim of the turbine disc A to push the moving assembly 12, thereby preventing the rim of the turbine disc A from being deformed. In the process of the rotation of the turbine disc A, the control unit 4 can more accurately detect the stress information of the rim of the turbine disc A based on the different driving forces of the rim of the turbine disc A to push different moving assemblies 12, thereby adjusting the rotation information of the rotation of the turbine disc A and the bulging information of the inner diameter of the bulging turbine disc A. The rotation information may include the speed, acceleration and angle of rotation along the axial direction of the turbine disk A. The bulging information may include the clamping force and the bulging diameter. The rotation information and the bulging information may be set according to actual needs.

[0030] According to the embodiment of the present disclosure, by setting the internal expansion clamp 5, the inner diameter of the turbine disk A can be expanded to make the turbine disk A reach the specified size. By setting the constraint part 1, based on the driving force of the wheel rim of the turbine disk A to push the moving component 12, the stress information of the wheel rim of the turbine disk A can be detected more accurately to adjust the rotation information of the rotation of the turbine disk A and the expansion information of the inner diameter of the expanded turbine disk A, and by controlling the position of the moving component 12 on the track 111, the wheel rim of the turbine disk A can be prevented from being deformed, thereby overcoming the difficulty of controlling and monitoring the residual stress of the turbine disk A during the rotation process, and achieving the purpose of accurately regulating the residual stress change of the aircraft engine turbine disk A during the rotation process.

[0031] In some embodiments, the fixed disk 11 may further include an inner ring 112 and an outer ring 113. The track 111 may extend from the outer ring 113 to the inner ring 112. The inner diameter of the outer ring 113 may be 1500 mm to 3000 mm. The inner diameter of the inner ring 112 may be 1000 mm to 2500 mm.

[0032] In some embodiments, the moving assembly 12 may include a support column 121 and a rotating wheel 122. The support column 121 may be arranged on the track 111, electrically connected to the control unit 4, and extend in an axial direction parallel to the turbine disk A. The rotating wheel 122 may be mounted on the support column 121 and contact the rim of the turbine disk A. In the process of the driving unit 3 driving the turbine disk A to rotate, the rotating wheel 122 rotates around the central axis of the support column 121. In the process of the inner expansion clamp 5 bulging the inner diameter of the turbine disk A, the rim of the turbine disk A pushes the rotating wheel 122 and the support column 121 to move along the track 111, and the control unit 4 controls the moving assembly 12 to prevent the rim of the turbine disk A from deforming. The rotating wheel 122 and the support column 121 may be rotatably connected. In the process of the driving unit 3 driving the turbine disk A to rotate, due to the friction between the rim and the rotating wheel 122, the rim can drive the rotating wheel 122 to rotate around the central axis of the support column 121. The control unit 4 can control the position of the moving assembly 12 on the track 111 based on the driving force of the wheel rim pushing the moving assembly 12, thereby preventing the wheel rim of the turbine disk A from deforming. The length of the support column 121 can be 200mm~500mm, and the diameter can be 100mm~300mm. The length of the rotating wheel 122 can be 200mm~500mm, the diameter can be 100mm~300mm, and the number can be 15~20. The length of the track 111 can be 300mm~800mm.

[0033] In some embodiments, the rotating wheel 122 may be made of an elastic material, so as to avoid scratches and other defects on the turbine disc A during the rotation of the turbine disc A. The rotating wheel 122 may be made of a polyurethane material.

[0034] In some embodiments, the device may further include a flexible connector 5. The flexible connector 5 may be disposed between the drive unit 3 and the internal expansion clamp 5 so that the drive unit 3 can smoothly drive the internal expansion clamp 5 to rotate. In the initial stage of the drive unit 3 driving the internal expansion clamp 5 to rotate, since the internal expansion clamp 5 is transformed from a static state to a rotating state, the internal expansion clamp 5 will have a short response delay due to inertia, and the flexible connector 5 can play a buffering role. In addition, at the moment when the internal expansion clamp 5 starts to rotate, due to the uneven force, a slight deformation may occur, and the flexible connector 5 can be provided to prevent the internal expansion clamp 5 from deforming. Further, at the end stage of the drive unit 3 driving the internal expansion clamp 5 to rotate, the flexible connector 5 can also play a role in buffering and preventing the internal expansion clamp 5 from deforming. Thus, by providing the flexible connector 5, the internal expansion clamp 5 and the turbine disc A can be driven to rotate smoothly and accurately. The drive unit 3 may include a housing and a motor. The motor may be installed in the housing. The output end of the motor may be connected to the flexible connector 5 through a rotating shaft. The motor can drive the internal expansion clamp 5 and the turbine disc A to rotate through the flexible connector 5. The maximum speed of the motor can be 20000r / min, and the maximum lifting speed acceleration can be 100r / min / s. The speed, acceleration, time and other parameters of the motor can also be set according to actual conditions to more accurately eliminate the residual stress of the turbine disc A. The rotating shaft and the flexible connector 5 can be connected by a fastening nut 9. The flexible connector 5 and the internal expansion clamp 5 can be connected by a fastening nut 9. The flexible connector 5 can be made of silicone rubber material. The thickness of the flexible connector 5 can be 100mm~300mm.

[0035] In some embodiments, the device may further include two limiting portions 6. The two limiting portions 6 may be respectively arranged on both sides of the turbine disk A. The two limiting portions 6 may be respectively sleeved on the internal expansion clamp 5. The limiting portion 6 may be stationary relative to the internal expansion clamp 5. The limiting portion 6 may cover the bearing hole of the turbine disk A. That is, the area of ​​the side of the limiting portion 6 covering the turbine disk A may be larger than the cross-sectional area of ​​the bearing hole of the turbine disk A, so as to prevent the turbine disk A from tilting relative to the internal expansion clamp 5 during the rotation of the turbine disk A, thereby improving the control accuracy of driving the turbine disk A to rotate. Each limiting portion 6 may include a limiting plate 62 and a cover plate 61. The limiting plate 62 and the cover plate 61 may be connected by a fastening nut 63. The cover plate 61 may be arranged between the limiting plate 62 and the turbine disk A.

[0036] like Figure 1 As shown, in some embodiments, the driving portion 3 may be disposed on a side of the internal expansion clamp 5 opposite to the constraining portion 1. The internal expansion clamp 5, the fixing disk 11 and / or the turbine disk A may be coaxially disposed.

[0037] In some embodiments, the device may further include a mounting frame 7. The mounting frame 7 may include a top plate 71 and a bottom plate 72. The constraint portion 1 may be mounted on the bottom plate 72. The side of the internal expansion clamp 5 opposite to the driving portion 3 may be rotatably mounted on the bottom plate 72. The driving portion 3 may be mounted on the top plate 71. The driving portion 3 may drive the internal expansion clamp 5 to rotate relative to the mounting frame 7.

[0038] In some embodiments, the control unit 4 may include a detection unit 41, a drive control unit 42, and a calculation unit 43. The detection unit 41 may be electrically connected to the moving assembly 12. The detection unit 41 may be used to detect the driving force of the rim of the turbine disk A pushing the moving assembly 12. The drive control unit 42 may be electrically connected to the drive unit 3. The calculation unit 43 may calculate the residual stress of the turbine disk A based on the driving force, control the drive unit 3 to drive the turbine disk A to rotate based on the residual stress, and use the detection unit 41 to control the moving assembly 12 to be located at a predetermined position on the track 111, thereby preventing the rim of the turbine disk A from deforming. Further, the detection unit 41 may be a hydraulic servo controller. The moving assembly 12 may be a hydraulic actuator, and the hydraulic servo controller may control the speed of the moving assembly 12 as needed, so that the driving force of the rim of the turbine disk A pushing the moving assembly 12 may be more accurately detected and the moving assembly 12 may be located at a predetermined position on the track 111.

[0039] In some embodiments, the device may further include a display unit 8. The display unit 8 may be used to display stress information of the turbine disk A in real time.

[0040] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0041] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A device for eliminating residual stress of a turbine disk, characterized in that: include: Constraints, including: a fixed disk formed with a plurality of radially extending tracks; and A plurality of moving assemblies are respectively arranged on the rails, extending in an axial direction parallel to the turbine disk, and abutting against the rim of the turbine disk; An internal expansion fixture, which is internally expanded to fit the inner diameter of the turbine disk; a driving unit connected to the internal expansion clamp; and The control unit is electrically connected to the moving component. During the process of the inner expansion clamp expanding the inner diameter of the turbine disk, the control unit controls the moving component to prevent the rim of the turbine disk from deforming based on the driving force of the rim of the turbine disk pushing the moving component, and controls the driving unit to drive the turbine disk to rotate to eliminate the residual stress of the turbine disk.

2. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The mobile assembly comprises: a support column, disposed on the track, electrically connected to the control unit, and extending in an axial direction parallel to the turbine disk; and A rotating wheel is mounted on the support column and contacts the rim of the turbine disc. When the driving unit drives the turbine disc to rotate, the rotating wheel rotates around the central axis of the support column. When the internal expansion clamp bulges the inner diameter of the turbine disc, the rim of the turbine disc pushes the rotating wheel and the support column to move along the track. The control unit controls the moving assembly to prevent the rim of the turbine disc from deforming.

3. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: Also includes: A flexible connecting member is arranged between the driving part and the internal expansion clamp, so that the driving part can smoothly drive the internal expansion clamp to rotate.

4. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: Also includes: Two limiting parts are respectively arranged on both sides of the turbine disc, sleeved on the internal expansion clamp, and cover the bearing hole of the turbine disc to prevent the turbine disc from tilting relative to the internal expansion clamp during the rotation of the turbine disc.

5. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The driving portion is arranged on a side of the internal expansion clamp opposite to the restraining portion, and the internal expansion clamp, the fixing disk and / or the turbine disk are coaxially arranged.

6. The device for eliminating residual stress of a turbine disk according to claim 5, characterized in that: Also includes: The mounting frame comprises a top plate and a bottom plate, the constraint part is mounted on the bottom plate, the side of the internal expansion clamp opposite to the driving part is rotatably mounted on the bottom plate, and the driving part is mounted on the top plate.

7. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The fixed disk also includes: Inner ring; and The outer ring, the track extends from the outer ring to the inner ring.

8. The device for eliminating residual stress of a turbine disk according to claim 2, characterized in that: The rotating wheel is made of elastic material.

9. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The control unit includes: a detection unit, electrically connected to the moving assembly, configured to detect a driving force of the rim of the turbine disk pushing the moving assembly; a driving control unit, electrically connected to the driving unit; and The calculation unit calculates the residual stress of the turbine disk based on the driving force, controls the driving unit to drive the turbine disk to rotate based on the residual stress, and controls the moving component to prevent the rim of the turbine disk from deforming.

10. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: Also includes: The display unit is configured to display the stress information of the turbine disk in real time.

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