Device for eliminating residual stress of turbine disc

Abstract

The invention provides a device for eliminating residual stress of a turbine disc, and the device comprises a detection part which comprises a stress ring which is constructed to be attached to the rim of the turbine disc, and a plurality of grooves are formed in the stress ring; the stress sensors are contained in the grooves respectively, and the stress sensors are attached to the rim of the turbine disc so as to detect the stress of the rim of the turbine disc; the internal expansion type clamp is in internal expansion fit with the inner diameter of the turbine disc, and in the process that the internal expansion type clamp expands the inner diameter of the turbine disc, the stress ring prevents the rim of the turbine disc from deforming; the driving part is connected with the internal expansion type clamp; and the control part is used for controlling the driving part to drive the turbine disc to rotate based on the stress information detected by the stress sensor in the process of bulging the inner diameter of the turbine disc by the internal expansion type clamp 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] The turbine disk is the core rotating part and key part of the aircraft engine. During the forging, solutionizing and rapid cooling processes, thermal stress caused by different temperature differences will be generated inside the turbine disk. This thermal stress will cause uneven plastic deformation inside the disk, thereby forming a large internal residual stress gradient. Since the residual stress formed in the high-temperature alloy material during the quenching process cannot be completely eliminated through the recovery stage during the later aging or annealing treatment, most of the residual stress still exists in the turbine disk. This high residual stress level will not only cause the turbine disk to deform more during machining, increasing the difficulty and cycle of machining, but also during the service period of the turbine disk, excessive residual stress may cause the accumulation of plastic deformation, resulting in loose interference fit between components, and then causing excessive vibration and high-cycle fatigue problems. Therefore, a device that can effectively eliminate the residual stress of the turbine disk is needed. Summary of the invention

[0003] In view of this, the present disclosure provides a device for eliminating residual stress of a turbine disk, comprising: a detection unit, comprising: a stress ring, which is configured to fit on the rim of the turbine disk, and a plurality of grooves are formed on the stress ring; and a plurality of stress sensors, respectively accommodated in the grooves, the stress sensors fit on the rim of the turbine disk, thereby detecting the stress of the rim of the turbine disk; an internal expansion clamp, which is internally expanded with the inner diameter of the turbine disk, wherein, during the process of the internal expansion clamp expanding the inner diameter of the turbine disk, the stress ring prevents the rim of the turbine disk from deforming; a driving unit, which is connected to the internal expansion clamp; and a control unit, which controls the driving unit to drive the turbine disk to rotate based on the stress information detected by the stress sensors during the process of the internal expansion clamp expanding the inner diameter of the turbine disk, so as to eliminate the residual stress of the turbine disk.

[0004] Optionally, the driving part includes: a first driving assembly, which is coaxially arranged with the internal expansion clamp, and the first driving assembly is configured to drive the internal expansion clamp to rotate around a first axis to drive the turbine disk to rotate around the first axis, and the first axis coincides with the central axis of the turbine disk.

[0005] Optionally, the driving unit also includes: a second driving assembly, which is rotationally connected to the first driving assembly, and the second driving assembly is configured to drive the first driving assembly to rotate around a second axis to drive the turbine disk to rotate around a second axis, wherein the second axis is perpendicular to the first axis.

[0006] Optionally, the stress ring includes: a plurality of clamping assemblies, which are respectively mounted on the rim of the turbine disk, wherein a pair of adjacent clamping assemblies are rotationally connected via a locking member, and the remaining adjacent clamping assemblies are rotationally connected via a connecting member, wherein the locking member is configured to lock or loosen the stress ring.

[0007] Optionally, the clamping assembly includes: a ring-fitting plate, which is formed with the groove and fits with the rim of the turbine disk; and two clamping plates, which are arranged on both sides of the ring-fitting plate and fit with two opposite side surfaces of the turbine disk respectively.

[0008] 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.

[0009] Optionally, the device also includes a base, the second drive component is installed on the base, a support frame is formed at a position of the base opposite to the second drive component, the first end of the first drive component is rotatably connected to the second drive component, the second end of the first drive component is rotatably connected to the support frame, and the second axis coincides with a line connecting the first end and the second end.

[0010] Optionally, the first driving component includes: a rotating shell, a first rotating shaft and a second rotating shaft are respectively formed on the relatively first end and the second end of the rotating shell, the first rotating shaft is rotationally connected to the second driving component, and the second rotating shaft is rotationally connected to the support frame; and a motor, which is arranged in the rotating shell, and the motor drives the internal expansion clamp to rotate around the first axis to drive the turbine disk to rotate around the first axis.

[0011] Optionally, the control unit includes: a receiving unit configured to receive stress information detected by the detection component; and a control unit configured to determine rotation information for driving the turbine disk to rotate and expansion information for expanding the inner diameter of the turbine disk based on the stress information detected by the detection component, so as to control the internal expansion clamp to expand the inner diameter of the turbine disk, and control the driving unit to drive the turbine disk to rotate.

[0012] Optionally, the device further comprises: a display unit configured to display stress information of the turbine disk in real time.

[0013] According to the disclosed embodiment, the inner diameter of the turbine disk can be expanded by providing an internal expansion clamp, so that the turbine disk reaches a specified size. The stress sensor can be attached to the rim of the turbine disk by providing a stress ring, so that the stress distribution of the rim of the turbine disk can be accurately detected in real time during the rotation of the turbine disk. Therefore, the driving information of the driving unit can be adjusted in real time based on the stress distribution, and the residual stress of the turbine disk can be effectively and accurately eliminated. In addition, the rim of the turbine disk can be prevented from being deformed by providing a stress ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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:

[0015] 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.

[0016] 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.

[0017] 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.

[0018] Figure 4 A perspective view of a detection unit according to an embodiment of the present disclosure is schematically shown.

[0019] Figure 5 A partial exploded view of a detection unit according to an embodiment of the present disclosure is schematically shown.

[0020] Reference numerals

[0021] A. turbine disk; 1. detection unit; 11. stress ring; 111. clamping assembly; 112. locking member; 113. connecting member; 114. ring plate; 115. clamping plate; 116. groove; 12. stress sensor; 2. internal expansion clamp; 3. driving unit; 31. first driving assembly; 32. second driving assembly; 4. control unit; 41. receiving unit; 42. control unit; 5. limiting unit; 6. base; 61. support frame; 17. rotating shaft; 7. display unit. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.).

[0026] 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). Figure 4 A perspective view of a detection unit according to an embodiment of the present disclosure is schematically shown. Figure 5 A partial exploded view of a detection unit according to an embodiment of the present disclosure is schematically shown.

[0027] like Figure 1-Figure 5As shown, an embodiment of the present disclosure provides a device for eliminating residual stress of a turbine disk A. The turbine disk A may be a turbine blank disk. The rim of the turbine disk A may be circular. The turbine disk A may be made of a high-temperature alloy material such as GH4169. The device may include a detection unit 1, an internal expansion clamp 2, a drive unit 3, and a control unit 4. The detection unit 1 may include a stress ring 11 and a plurality of stress sensors 12. The stress ring 11 may be fitted on the rim of the turbine disk A. The stress ring 11 may remain stationary with the turbine disk A. A plurality of grooves 116 may be formed on the stress ring 11. A plurality of stress sensors 12 may be respectively accommodated in the grooves 116 so that the stress sensors 12 fit the rim of the turbine disk A, so that the stress of the rim of the turbine disk A may be detected using the stress sensors 12.

[0028] The internal expansion clamp 2 can be internally expanded with the inner diameter of the turbine disk A. In the process of the internal expansion clamp 2 expanding the inner diameter of the turbine disk A, the stress ring 11 can prevent the rim of the turbine disk A from being deformed. 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 clamp 2, the inner diameter of the turbine disk A can be expanded so that the turbine disk A reaches a specified size. In the case of the inner diameter of the turbine disk A expanding, a force that squeezes the rim of the turbine disk A will be generated. The stress ring 11 can remain stationary with the rim of the turbine disk A. Since the size of the stress ring 11 is fixed, the stress ring 11 can prevent the rim of the turbine disk A from being deformed in the process of the internal expansion clamp 2 expanding the inner diameter of the turbine disk A.

[0029] The driving part 3 can be connected to the internal expansion clamp 2. The driving part 3 can be used to drive the internal expansion clamp 2 to rotate. Since the detection part 1 is fixed to the outer periphery of the turbine disk A through the stress ring 11, when the turbine disk A rotates, the detection part 1 can rotate with the turbine disk A to detect the stress condition at the same position in real time.

[0030] When the inner expansion fixture 2 expands the inner diameter of the turbine disk A, the control unit 4 can control the driving unit 3 to drive the turbine disk A to rotate based on the stress information detected by the stress sensor 12 to eliminate the residual stress of the turbine disk A.

[0031] According to the embodiment of the present disclosure, the inner diameter of the turbine disk A can be expanded by providing the internal expansion clamp 2, so that the turbine disk A reaches the specified size. The stress sensor 12 can be attached to the rim of the turbine disk A by providing the stress ring 11, so that the stress distribution of the rim of the turbine disk A can be accurately detected in real time during the rotation of the turbine disk A. Therefore, the driving information of the driving unit 3 can be adjusted in real time based on the stress distribution, and the residual stress of the turbine disk A can be effectively and accurately eliminated. In addition, the rim of the turbine disk A can be prevented from being deformed by providing the stress ring 11.

[0032] In some embodiments, the driving part 3 includes a first driving assembly 31. The first driving assembly 31 can be coaxially arranged with the internal expansion clamp 2. The first driving assembly 31 can be used to drive the internal expansion clamp 2 to rotate around the first axis to drive the turbine disk A to rotate around the first axis. The first axis can coincide with the central axis of the turbine disk A. The turbine disk A can be rotated around its own central axis by setting the first driving assembly 31.

[0033] In some embodiments, the driving unit 3 may further include a second driving assembly 32. The second driving assembly 32 may be rotatably connected to the first driving assembly 31. The second driving assembly 32 may be used to drive the first driving assembly 31 to rotate around a second axis, so as to drive the turbine disk A to rotate around the second axis. The second axis may be perpendicular to the first axis. By providing the first driving assembly 31 and the second driving assembly 32, the turbine disk A may be rotated at any angle, thereby eliminating residual stress in any direction of the turbine disk A.

[0034] like Figure 2 As shown, in some embodiments, the device may further include a base 6. The second drive assembly 32 may be mounted on the base 6. A support frame 61 may be formed at a position of the base 6 opposite to the second drive assembly 32. The first end of the first drive assembly 31 may be rotatably connected to the second drive assembly 32. The second end of the first drive assembly 31 may be rotatably connected to the support frame 61, so that the first drive assembly 31 may rotate around the support frame 61 and the second drive assembly 32. The second axis may coincide with the mounting axis of the first end and the mounting axis of the second end, so that the first drive assembly 31 drives the turbine disc A to rotate around the second axis.

[0035] In some embodiments, the first drive assembly 31 may include a rotating housing and a motor. A first rotating shaft and a second rotating shaft may be formed on the first and second ends of the rotating housing, respectively. The first rotating shaft may be rotatably connected to the second drive assembly 32. The second rotating shaft may be rotatably connected to the support frame 61, so that the first drive assembly 31 may rotate around the support frame 61 and the second drive assembly 32. The motor may be disposed in the rotating housing. The output shaft of the motor may be connected to the internal expansion clamp 2, so that the motor may drive the internal expansion clamp 2 to rotate around the first axis to drive the turbine disk A to rotate around the first axis.

[0036] like Figure 3-5As shown, in some embodiments, the stress ring 11 may include a plurality of clamping assemblies 111. The plurality of clamping assemblies 111 may be respectively sleeved on the rim of the turbine disk A. The clamping assembly may remain stationary with the turbine disk A. A pair of adjacent clamping assemblies 111 may be rotatably connected by a locking member 112. The remaining adjacent clamping assemblies 111 may be rotatably connected by a connecting member 113. The locking member 112 may be used to lock or loosen the stress ring 11. By providing the locking member 112, the stress sensor 12 may be kept in full contact with the turbine disk A during the rotation of the turbine disk A, thereby improving the detection accuracy. The clamping assembly 111, the locking member 112 and the connecting member 113 may have a curved arc surface to better fit the rim of the turbine disk A, thereby further improving the detection accuracy. The stress sensor 12 may also be fixed to the rim of the turbine disk A by bonding.

[0037] like Figure 3-5 As shown, in some embodiments, the clamping assembly 111 may include a ring-fitting plate 114 and two clamping plates 115. A groove 116 may be formed on the ring-fitting plate 114. The ring-fitting plate 114 may fit with the rim of the turbine disk A. The two clamping plates 115 may be respectively arranged on both sides of the ring-fitting plate 114 and fit with the two opposite sides of the turbine disk A respectively. The ring-fitting plate 114 and the clamping plate 115 may be integrally formed. The clamping assembly 111 and the locking member 112 may be connected by a rotating shaft 17. The clamping assembly 111 and the connecting member 113 may be connected by a rotating shaft 17. The rotating shaft 17 may be installed on the turbine disk A by a threaded connection, so that the rotating shaft 17 clamping plate 115 and the ring-fitting plate 114 are installed on the rim of the turbine disk A. The clamping plate 115 may have a first portion that fits with the side of the turbine disk A and a second portion that fits with the rim of the turbine disk A. The second portion may have a cambered surface that matches the shape of the rim of the turbine disk A so as to better fit the rim of the turbine disk A.

[0038] Furthermore, the outer diameter of the turbine disk A can be set to 500~800mm. Parameters such as the outer diameter of the turbine disk A can also be set according to actual conditions. The length of the rotating shaft 17 can be 50mm~200mm. The thickness of the ring plate 114 can be 50mm~100mm. The thickness of the clamping plate 115 can be 80mm~150mm. The thickness of the connecting member 113 can be 50mm~100mm. The thickness of the connecting portion between the locking member 112 and the clamping assembly 111 can be 50mm~150mm. The thickness of the stress sensor 12 can be 3mm~6mm. Parameters such as the length, thickness and number of components of each component in the detection unit 1 can also be set according to actual conditions.

[0039] In some embodiments, the device further includes two limiting portions 5. The two limiting portions 5 can be respectively arranged on both sides of the turbine disk A. The two limiting portions 5 can be respectively sleeved on the internal expansion clamp 2. The limiting portion 5 can be stationary relative to the internal expansion clamp 2. The limiting portion 5 can cover the bearing hole of the turbine disk A. That is, the area of ​​the side of the limiting portion 5 covering the turbine disk A can 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 2 during the rotation of the turbine disk A, thereby improving the control accuracy of driving the turbine disk A to rotate. Each limiting portion 5 may include a limiting plate and a cover plate. The limiting plate and the cover plate may be connected by a fastening nut. The cover plate may be arranged between the limiting plate and the turbine disk A.

[0040] In some embodiments, the control unit 4 may include a receiving unit 41 and a control unit 42. The receiving unit 41 may be used to receive stress information detected by the detection component in real time. The stress sensor 12 may communicate with the receiving unit 41 wirelessly. The control unit 42 may communicate with the first drive component 31, the second drive component 32 and the internal expansion fixture 2 wirelessly. The control unit 42 may be used to determine the rotation information of driving the turbine disk A to rotate and the bulging information of the inner diameter of the bulging turbine disk A based on the stress information detected by the detection component, so as to control the inner diameter of the bulging turbine disk A of the internal expansion fixture 2, and control the drive unit 3 to drive the turbine disk A to rotate, so as to eliminate the residual stress more accurately and process the turbine disk A to the specified size. The rotation information may include the speed, acceleration and angle of rotation along the first axis, and the speed, acceleration and angle of rotation along the second axis. 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.

[0041] In some embodiments, the device may further include a display unit 7. The display unit 7 may be used to display stress information of the turbine disk A in real time.

[0042] In some embodiments, the device can be mounted on a test bench to perform test processing.

[0043] In some embodiments, the maximum test speed of the first drive assembly 31 driving the internal expansion clamp 2 to rotate around the first axis can be 18000r / min, and the maximum lifting speed acceleration can be 50r / min / s. The second drive assembly 32 drives the internal expansion clamp 2 to rotate around the second axis in a rotation angle range of 0°~±90°, and the maximum speed can be 3r / min.

[0044] 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.

[0045] 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: Testing department, including: A stress ring, configured to fit on the rim of the turbine disk, wherein a plurality of grooves are formed on the stress ring; and A plurality of stress sensors are respectively accommodated in the grooves, wherein the stress sensors are attached to the rim of the turbine disk, thereby detecting the stress of the rim of the turbine disk; An internal expansion fixture is internally expanded with the inner diameter of the turbine disk, wherein the stress ring prevents the rim of the turbine disk from deforming during the process of the internal expansion fixture expanding the inner diameter of the turbine disk; a driving unit connected to the internal expansion clamp; and The control unit controls the driving unit to drive the turbine disk to rotate based on the stress information detected by the stress sensor during the process of the inner expansion clamp expanding the inner diameter of the turbine disk 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 driving unit comprises: The first drive assembly is coaxially arranged with the internal expansion clamp, and is configured to drive the internal expansion clamp to rotate around a first axis to drive the turbine disk to rotate around the first axis, wherein the first axis coincides with a central axis of the turbine disk.

3. The device for eliminating residual stress of a turbine disk according to claim 2, characterized in that: The driving unit further includes: The second drive assembly is rotationally connected to the first drive assembly, and the second drive assembly is configured to drive the first drive assembly to rotate around a second axis to drive the turbine disk to rotate around a second axis, wherein the second axis is perpendicular to the first axis.

4. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The stress ring comprises: A plurality of clamping assemblies are respectively sleeved on the rim of the turbine disk, wherein a pair of adjacent clamping assemblies are rotationally connected via a locking member, and the remaining adjacent clamping assemblies are rotationally connected via a connecting member, wherein the locking member is configured to lock or loosen the stress ring.

5. The device for eliminating residual stress of a turbine disk according to claim 4, characterized in that: The clamping assembly comprises: A ring-fitting plate, formed with the groove, the ring-fitting plate being fitted with the rim of the turbine disk; and Two clamping plates are arranged on both sides of the ring-adhering plate and are respectively fitted with two opposite side surfaces of the turbine disc.

6. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The device 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.

7. The device for eliminating residual stress of a turbine disk according to claim 3, characterized in that: The device also includes a base, the second drive component is installed on the base, a support frame is formed at a position of the base opposite to the second drive component, the first end of the first drive component is rotatably connected to the second drive component, the second end of the first drive component is rotatably connected to the support frame, and the second axis coincides with a line connecting the first end and the second end.

8. The device for eliminating residual stress of a turbine disk according to claim 7, characterized in that: The first driving assembly comprises: A rotating shell, wherein a first rotating shaft and a second rotating shaft are respectively formed on first and second ends of the rotating shell, the first rotating shaft is rotatably connected to the second driving assembly, and the second rotating shaft is rotatably connected to the support frame; and A motor is arranged in the rotating shell, and the motor drives the internal expansion clamp to rotate around the first axis to drive the turbine disk to rotate around the first axis.

9. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The control unit includes: a receiving unit, configured to receive stress information detected by the detection component; and The control unit is configured to determine the rotation information for driving the turbine disk to rotate and the expansion information for expanding the inner diameter of the turbine disk based on the stress information detected by the detection component, so as to control the internal expansion clamp to expand the inner diameter of the turbine disk, and control the driving part to drive the turbine disk to rotate.

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

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