Device for eliminating residual stress of turbine disc

Abstract

The invention provides a device for eliminating residual stress of a turbine disc, a plurality of mortises are formed on the rim of the turbine disc, and the device comprises a detection part which comprises a stress ring provided with a plurality of through holes extending along the radial direction of the stress ring; the plurality of detection assemblies respectively penetrate through the through holes and extend to the rim of the turbine disc so as to detect the stress of the rim of the turbine disc, and part of the detection assemblies and the mortises form a tenon connection structure so as to fix the stress ring on the periphery of the turbine disc; and 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 detection assembly 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] After the original loads and constraints are removed, aircraft engine turbine disks and gas turbine turbine disks still have residual stress, which mainly comes from the heat treatment process. This is because the residual stress formed in the turbine disk during the quenching process, although it is relaxed in the subsequent aging process, has not completely disappeared. Especially for turbine disks using γ / γ´ high-temperature alloys, rapid cooling after solution heat treatment will immediately lead to the precipitation of γ / γ´ phases, which in turn affects the distribution of residual stress. The residual stress distribution on the turbine disk after heat treatment has an important influence on subsequent processing and use. Especially for large and thin turbine disks, residual stress will make it difficult to control the size during processing, thus affecting the achievement of the specified size.

[0003] In order to ensure that the dimensional accuracy and fatigue life of the turbine disk are not affected by the residual stress of heat treatment, a pre-rotation method can be used. This method changes the residual stress distribution inside the turbine disk by pre-rotating it to a certain speed, thereby achieving effective control of dimensional accuracy and fatigue life. However, due to the differences in the structure, size, pre-rotation speed and acceleration of the turbine disk, the magnitude and distribution position of the residual stress will vary, which makes it complicated to accurately control the residual stress distribution state during the pre-rotation process, and the relevant devices for eliminating the residual stress of the turbine disk are difficult to achieve precise regulation of the residual stress. Summary of the invention

[0004] In view of this, the present disclosure provides a device for eliminating residual stress of a turbine disk, wherein a rim of the turbine disk is formed with a plurality of mortises, and the device comprises: a detection portion, comprising: a stress ring, formed with a plurality of through holes, wherein the through holes extend radially along the stress ring; and a plurality of detection components, respectively extending through the through holes to the rim of the turbine disk to detect stress of the rim of the turbine disk, wherein some of the detection components form a mortise connection structure with the mortise, so as to fix the stress ring on the outer periphery of the turbine disk; an internal expansion clamp, internally expanding 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 clamp expanding the inner diameter of the turbine disk; a driving portion, connected to the internal expansion clamp; and a control portion, wherein during the process of the internal expansion clamp expanding the inner diameter of the turbine disk, the control portion controls the driving portion to drive the turbine disk to rotate based on stress information detected by the detection component to eliminate residual stress of the turbine disk.

[0005] 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.

[0006] Optionally, the driving unit also includes: a second driving assembly, rotatably connected to the first driving assembly, the second driving assembly being 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.

[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 detection assembly includes: a support column extending through the through hole to a rim close to the turbine disk; and a stress sensor mounted on the support column and in contact with the rim of the turbine disk to detect stress of the rim of the turbine disk.

[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, the installation axis of the first end and the installation axis of the second end coincide with each other.

[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 detection component is threadedly connected to the through hole.

[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, 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. By providing a detection component and a tenon-groove to form a tenon connection structure, the detection component and the stress ring can be fixed to the outer periphery of the turbine disk, so that in the process of rotating the turbine disk, the stress distribution of the rim of the turbine disk can be accurately detected in real time. Therefore, based on the stress distribution, the driving information of the driving unit can be adjusted in real time, and the residual stress of the turbine disk can be effectively and accurately eliminated. In addition, by providing a stress ring, the rim of the turbine disk can be prevented from being deformed. 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 The figure schematically shows a top view of a turbine disk and a detection portion according to an embodiment of the present disclosure.

[0019] Reference numerals

[0020] A. turbine disk; 1. detection unit; 11. stress ring; 12. detection assembly; 121. support column; 122. stress sensor; 2. internal expansion clamp; 3. drive unit; 31. first drive assembly; 32. second drive assembly; 4. control unit; 41. receiving unit; 42. control unit; 5. limit unit; 6. base; 61. support frame; 7. display unit. 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, the embodiment of the present disclosure provides a device for eliminating residual stress of a turbine disk A. The rim of the turbine disk A may be formed with a plurality of tongues and grooves. The device may include a detection unit 1, an internal expansion clamp 2, a driving unit 3, and a control unit 4. The plurality of tongues and grooves may be evenly spaced. The turbine disk A may be made of a high-temperature alloy material such as GH4169.

[0027] The detection part 1 may include a stress ring 11 and a plurality of detection components 12. The stress ring 11 may be formed with a plurality of through holes, and the through holes may extend in the radial direction of the stress ring 11. The plurality of through holes may be evenly spaced. The detection components 12 may extend through the through holes to the rim of the turbine disk A respectively to detect the stress of the rim of the turbine disk A. Some of the detection components 12 form a tenon connection structure with the tenon groove to fix the stress ring 11 to the periphery of the turbine disk A. The rim of the turbine disk A may include a rim formed with a tenon groove and a rim not formed with a tenon groove. The number of detection components 12 may be the same as the number of through holes. The stress ring 11 may be fixed to the periphery of the turbine disk A through the stable tenon connection structure formed by the detection component 12 and the tenon groove.

[0028] Furthermore, the outer diameter of the turbine disk A can be set to 500~800mm. The distance between the inner diameter of the stress ring 11 and the outer diameter of the turbine disk A can be less than or equal to 30mm. The thickness of the stress ring 11 is greater than or equal to the maximum thickness of the turbine disk A. The width of the stress ring 11 can be 1H~10H. H can characterize the maximum thickness of the turbine disk A. The thickness can be expressed as the difference between the inner diameter and the outer diameter. Parameters such as the outer diameter, maximum thickness, thickness and width of the turbine disk A can also be set according to actual conditions. By constraining the thickness and width of the stress ring 11 and the distance between the stress ring 11 and the turbine disk A, the rigidity of the stress ring 11 can be improved, and deformation of the stress ring 11 during rotation due to excessive diameter and thin wall thickness can be avoided.

[0029] The internal expansion clamp 2 can be expanded with the inner diameter of the turbine disk A to clamp 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 detection component 12. 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.

[0030] 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 stress ring 11 is fixed to the outer periphery of the turbine disk A through the detection component 12, when the turbine disk A rotates, the detection component 12 and the stress ring 11 rotate with the turbine disk A to detect the stress condition at the same position in real time.

[0031] 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 detection component 12 to eliminate the residual stress of the turbine disk A.

[0032] According to the embodiment of the present disclosure, the inner diameter of the turbine disk A can be expanded by setting the internal expansion clamp 2, so that the turbine disk A reaches the specified size. By setting the detection component 12 and the tenon groove to form a tenon connection structure, the detection component 12 and the stress ring 11 can be fixed on the outer periphery of the turbine disk A, so that in the process of rotating the turbine disk A, the stress distribution of the rim of the turbine disk A can be accurately detected in real time. Therefore, based on the stress distribution, the driving information of the driving unit 3 can be adjusted in real time, and the residual stress of the turbine disk A can be effectively and accurately eliminated. In addition, by setting the stress ring 11, the rim of the turbine disk A can be prevented from being deformed.

[0033] In some embodiments, the detection component 12 and the through hole can be threadedly connected so that the detection component 12 and the stress ring 11 remain stationary to fix the stress ring 11 on the outer periphery of the turbine disk A and prevent the rim of the turbine disk A from deforming during the process of expanding the inner diameter of the turbine disk A by the internal expansion clamp 2.

[0034] In some embodiments, the driving part 3 may include a first driving assembly 31. The first driving assembly 31 may be coaxially arranged with the internal expansion clamp 2. The first driving assembly 31 may be used to drive the internal expansion clamp 2 to rotate around a first axis to drive the turbine disk A to rotate around the first axis, and the first axis coincides with the central axis of the turbine disk A. The turbine disk A may be rotated around its own central axis by arranging the first driving assembly 31.

[0035] 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.

[0036] 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.

[0037] 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 extend out of the housing and be connected to the internal expansion clamp 2, so that the internal expansion clamp 2 may be driven to rotate around the first axis to drive the turbine disk A to rotate around the first axis.

[0038] In some embodiments, the device may further include two limiting portions 5. The two limiting portions 5 may be respectively arranged on the two sides of the turbine disk A. The two limiting portions 5 may be respectively sleeved on the internal expansion clamp 2. The limiting portion 5 may be stationary relative to the internal expansion clamp 2. The limiting portion 5 may 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 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 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.

[0039] In some embodiments, the detection assembly 12 may include a support column and a stress sensor. The support column may extend through the through hole to a rim near the turbine disk A. The stress sensor may be mounted on the support column and contact the rim of the turbine disk A to detect the stress of the rim of the turbine disk A. After the detection assembly 12 is installed, the support column may remain stationary with the stress ring 11. The support column may be threadedly connected to the stress ring 11. The support column and the stress sensor may remain stationary. The support column and the stress sensor may be threadedly connected. Since the stress ring 11, the support column and the stress sensor remain stationary, the rim of the turbine disk A may be prevented from deforming during the process of the inner expansion fixture 2 expanding the inner diameter of the turbine disk A.

[0040] Furthermore, the dimensions of the support column and the stress sensor in the detection assembly 12 can be set as required. For example, the length of the support column can be 100 mm to 200 mm. The difference between the diameter of the support column and the minimum width of the mortise and tenon is between 5 mm and 10 mm. The length of the connection between the support column and the stress sensor can be 5 to 10 mm.

[0041] 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 12 in real time. The stress sensor may communicate wirelessly with the receiving unit 41. The control unit 42 may communicate wirelessly with the first drive component 31, the second drive component 32 and the internal expansion clamp 2. 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 12, so as to control the inner diameter of the bulging turbine disk A of the internal expansion clamp 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.

[0042] In some embodiments, the device further comprises a display unit 7. The display unit 7 can be used to display stress information of the turbine disk A in real time.

[0043] In some embodiments, the device can be mounted on a test bench to perform test processing.

[0044] In some embodiments, the maximum test speed of the first drive component 31 driving the internal expansion clamp 2 to rotate around the first axis can be 15000r / min, and the maximum lifting speed acceleration can be 20r / min / s. The second drive component 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 5r / min.

[0045] 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.

[0046] 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: The wheel rim of the turbine disk is formed with a plurality of tongues and grooves, and the device comprises: Testing department, including: A stress ring is formed with a plurality of through holes, wherein the through holes extend in a radial direction of the stress ring; and A plurality of detection components respectively extend through the through holes to the rim of the turbine disk to detect the stress of the rim of the turbine disk, wherein some of the detection components form a tenon connection structure with the tenon groove to fix the stress ring on the outer periphery 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 detection component during the process of the inner expansion clamp expanding the inner diameter of the turbine disk, so as 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 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.

5. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The detection component comprises: a support column extending through the through hole to a rim near the turbine disk; and The stress sensor is installed on the support column and contacts the rim of the turbine disk to detect the stress of the rim of the turbine disk.

6. 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, the installation axis of the first end and the installation axis of the second end coincide with each other.

7. The device for eliminating residual stress of a turbine disk according to claim 6, 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.

8. 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.

9. The device for eliminating residual stress of a turbine disk according to claim 1, characterized in that: The detection component is threadedly connected to the through hole.

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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