A high-precision clamp for large-size gas turbine casing ring

Abstract

A kind of high-precision fixture for large-size gas turbine casing ring, including base, adjusting device and multiple tensioning devices, the base is uniformly provided with multiple tensioning devices in the circumferential direction, multiple the distance of the tensioning device with thin-walled ring rotating center is equal, the top of the tensioning device is provided with tensioning block, the outer edge of the tensioning block is arc-shaped and cooperates with thin-walled ring, the bottom of the outer edge of the tensioning block is elastically connected with tensioning device, the distance of the outer edge of the tensioning block with thin-walled ring rotating center is equal, the outside of the tensioning device is provided with adjusting device, and the adjusting device is simultaneously driven and cooperates with each tensioning block.This design can not only drive all tensioning blocks to synchronously clamp ring simultaneously, effectively improve the roundness of ring, but also can be clamped along the radial direction of thin-walled ring, effectively improve the clamping precision of fixture.

Description

Technical Field

[0001] This invention relates to a machining fixture, and more particularly to a high-precision fixture for large-size gas turbine casing ring clamps. Background Technology

[0002] The casing is an important component of a gas turbine. It connects various parts of the gas turbine, internally connecting the turbine combustion chamber and externally connecting components such as exhaust pipes, oil lines, and cooling pipes. As the load-bearing and connecting component of the gas turbine, the casing's main structure is mostly a thin-walled rotating body with complex internal and external structures.

[0003] For common medium-sized gas turbines, the casing diameter is over 1 meter. Due to the thin wall thickness, the casing has poor rigidity. To ensure smooth connection between the casing and various components during assembly, the interface features at the end of the casing and on the outer circle have high positional accuracy requirements.

[0004] The existing fixture includes multiple clamping components arranged in a circumferential direction, which uniformly clamp the casing ring.

[0005] Although this device can securely clamp the casing ring, it still has the following drawbacks:

[0006] When processing these features, special fixtures are usually used to tension the casing and restore the roundness of the casing before processing to ensure that the assembly state of each interface feature is qualified.

[0007] 1. In the existing fixture, each clamping component needs to be controlled individually, which leads to inconsistent clamping actions and makes it impossible to guarantee the roundness of the casing ring.

[0008] 2. Because each clamping component needs to be controlled individually, the clamping operation is complicated and the processing efficiency is low.

[0009] The information disclosed in this background section is intended only to enhance understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the inability to guarantee the roundness of the casing ring and low processing efficiency, and to provide a high-precision fixture for large-size gas turbine casing rings that can guarantee the roundness of the casing ring and has high processing efficiency.

[0011] To achieve the above objectives, the technical solution of the present invention is:

[0012] A high-precision clamp for large-size gas turbine casing rings, the clamp comprising: a base, an adjustment device, and multiple tensioning devices;

[0013] Multiple tensioning devices are evenly arranged on the base along the circumferential direction. The distance between the multiple tensioning devices and the rotation center of the thin-walled ring is equal. A tensioning block is provided on the top of the tensioning device. The outer edge of the tensioning block is an arc shape that matches the thin-walled ring. The bottom of the outer edge of the tensioning block is elastically connected to the tensioning device. The distance between the outer edge of the tensioning block and the rotation center of the thin-walled ring is equal.

[0014] An adjustment device is provided on the outside of the tensioning device, and the adjustment device is in transmission cooperation with each tensioning block.

[0015] The tensioning device includes a fixed arm and a movable arm. The bottom of the fixed arm is fixedly connected to the top of the base. The middle part of the fixed arm is hinged to the middle part of the movable arm. A tensioning block is provided at the top of the fixed arm. The outer edge of the tensioning block is elastically connected to the fixed arm. The inner edge of the tensioning block is in transmission engagement with the top of the movable arm.

[0016] The fixed arm includes a support rod, a hinge seat, and a support plate. The support rod is fixedly mounted vertically on the top of the base. A hinge seat is fixedly mounted in the middle of the support rod. The middle of the movable arm is hinged to the hinge seat. A support plate is fixedly mounted horizontally on the top of the support rod. The support plate is a long strip structure and is arranged along the circumference of the base. A stop block is fixedly mounted on the end of the support plate away from the center of the base. A tension block is mounted on the end of the support plate near the center of the base. The tension block is elastically connected to the stop block by a spring.

[0017] The clamp also includes an annular pad, the rotation center of which coincides with the rotation center of the thin-walled ring. The annular pad is positioned directly above each fixed arm and is fixedly connected to each fixed arm. The inner edge of the annular pad is matched with a tensioning block for limiting. A stop block and a spring are positioned between the annular pad and the support rod. A limit slider is positioned horizontally at the bottom of the tensioning block and is positioned between the annular pad and the support rod. The limit slider is elastically connected to the stop block via a spring.

[0018] The support rod has a hinge seat mounting hole in the middle along the horizontal direction. The hinge seat is provided with an integral smooth rod bolt. The smooth rod bolt cooperates with the hinge seat mounting hole. After the smooth rod bolt on the hinge seat is inserted into the hinge seat mounting hole, it is connected to the nut.

[0019] The bottom of the support rod is provided with a sliding column mounting hole, and a sliding column is provided in the sliding column mounting hole. One end of the sliding column is in transmission cooperation with the adjustment device, and the other end of the sliding column is in transmission cooperation with the bottom of the movable arm.

[0020] The adjusting device includes an adjusting ring, an adjusting ear plate, and multiple protrusions. The number of protrusions is the same as the number of tensioning devices. The adjusting ear plate is fixedly disposed on the outer edge of the adjusting ring, and the protrusions are uniformly fixedly disposed on the inner edge of the adjusting ring along the circumferential direction. The protrusions are arranged corresponding to the tensioning devices.

[0021] The base includes a base plate and multiple segmented pressure rings. The multiple segmented pressure rings are evenly fixed on the top of the base plate along the circumferential direction. Each segmented pressure ring is an arc-shaped structure that matches the outer edge of the adjusting ring. The top of each segmented pressure ring is provided with a flange that matches the top limit of the adjusting ring.

[0022] The base also includes two ear seats, two adjusting bolts and two limiting nuts. The two ear seats are respectively disposed on both sides of the adjusting ear plate. The bottom of the ear seats is fixedly connected to the top of the base plate. The ear seats are provided with threaded holes in the horizontal direction to cooperate with the adjusting bolts. The bolt shank of the adjusting bolt passes through the limiting nuts and the threaded holes on the ear seats in sequence and then engages with the adjusting ear plate in a transmission cooperation.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. This invention discloses a high-precision clamp for large-size gas turbine casing rings. Multiple tensioning devices are evenly arranged along the circumference of the base. Each tensioning device has a tensioning block, the outer edge of which is arc-shaped to mate with the thin-walled ring. All tensioning blocks are simultaneously driven by an adjusting device, allowing the clamp to simultaneously control all tensioning blocks to synchronously clamp the ring during operation. Therefore, this design can simultaneously drive all tensioning blocks to synchronously clamp the ring, effectively improving the roundness of the ring.

[0025] 2. In a high-precision clamping device for large-size gas turbine casing rings, the present invention includes a tensioning device comprising a fixed arm and a movable arm. The bottom of the movable arm is drivenly engaged with an adjusting device, and the top of the movable arm is drivenly engaged with a tensioning block. A limit slider is provided at the bottom of the tensioning block in a horizontal direction. The limit slider is positioned between a support rod and an annular pad, so that the tensioning block is limited by the support rod and the annular pad, and is clamped radially by the thin-walled ring, thereby improving the clamping accuracy of the tensioning block. Therefore, this design can clamp radially by the thin-walled ring, effectively improving the clamping accuracy of the clamp.

[0026] 3. In a high-precision fixture for large-size gas turbine casing rings, the support rod has a hinge seat mounting hole. The hinge seat is installed in the hinge seat mounting hole by an integrally structured smooth rod bolt. When the thickness of the thin-walled ring is different, the range of motion of the tensioning block can be adjusted by setting shims on the smooth rod bolt. Therefore, this design can effectively expand the adaptability range of the fixture by adjusting the range of motion of the tensioning block by setting shims on the smooth rod bolt. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 yes Figure 1 Top view of the tension block.

[0029] Figure 3 yes Figure 1 Cross-sectional view of the middle sliding column.

[0030] Figure 4 yes Figure 1 A cross-sectional view of the movable arm.

[0031] Figure 5 yes Figure 1 A cross-sectional view of the fixed arm.

[0032] Figure 6 yes Figure 1 Top view of the middle adjustment ring.

[0033] Figure 7 This is a schematic diagram of the structure of the present invention in the released state.

[0034] Figure 8 This is a schematic diagram of the structure of the present invention in the clamping state.

[0035] Figure 9 yes Figure 7 A schematic diagram of the structure of a thin-walled ring component.

[0036] In the diagram: Base 1, Base plate 11, Segmented pressure ring 12, Flanged edge 13, Ear seat 14, Adjusting bolt 15, Limiting nut 16, Adjusting device 2, Adjusting ring 21, Adjusting ear plate 22, Protrusion 23, Tensioning device 3, Fixed arm 4, Support rod 41, Hinge seat 42, Support plate 43, Stop block 44, Spring 45, Hinge seat mounting hole 46, Smooth rod bolt 47, Sliding column mounting hole 48, Sliding column 49, Movable arm 5, Tensioning block 6, Limiting slider 61, Thin-walled ring 7, Annular pad 8. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] See Figures 1 to 9 A high-precision clamp for large-size gas turbine casing rings, the clamp comprising: a base 1, an adjustment device 2, and multiple tensioning devices 3;

[0039] Multiple tensioning devices 3 are evenly arranged along the circumferential direction on the base 1. The distance between the multiple tensioning devices 3 and the rotation center of the thin-walled ring 7 is equal. A tensioning block 6 is provided on the top of the tensioning device 3. The outer edge of the tensioning block 6 is an arc shape that matches the thin-walled ring 7. The bottom of the outer edge of the tensioning block 6 is elastically connected to the tensioning device 3. The distance between the outer edge of the tensioning block 6 and the rotation center of the thin-walled ring 7 is equal.

[0040] An adjustment device 2 is provided on the outside of the tensioning device 3, and the adjustment device 2 is in transmission cooperation with each tensioning block 6.

[0041] The tensioning device 3 includes a fixed arm 4 and a movable arm 5. The bottom of the fixed arm 4 is fixedly connected to the top of the base 1. The middle part of the fixed arm 4 is hinged to the middle part of the movable arm 5. A tensioning block 6 is provided on the top of the fixed arm 4. The outer edge of the tensioning block 6 is elastically connected to the fixed arm 4. The inner edge of the tensioning block 6 is in transmission engagement with the top of the movable arm 5.

[0042] The fixed arm 4 includes a support rod 41, a hinge seat 42, and a support plate 43. The support rod 41 is fixedly installed vertically on the top of the base 1. The hinge seat 42 is fixedly installed in the middle of the support rod 41. The middle of the movable arm 5 is hinged to the hinge seat 42. The support plate 43 is fixedly installed horizontally on the top of the support rod 41. The support plate 43 is a long strip structure and is arranged along the circumference of the base 1. A stop block 44 is fixedly installed on the end of the support plate 43 away from the center of the base 1. A tension block 6 is installed on the end of the support plate 43 near the center of the base 1. The tension block 6 is elastically connected to the stop block 44 by a spring 45.

[0043] The clamp also includes an annular pad 8, the rotation center of which coincides with the rotation center of the thin-walled ring 7. The annular pad 8 is positioned directly above each fixed arm 4 and is fixedly connected to each fixed arm 4. The inner edge of the annular pad 8 is limited to the tensioning block 6. The stop block 44 and spring 45 are positioned between the annular pad 8 and the support rod 41. The bottom of the tensioning block 6 is provided with a limit slider 61 in the horizontal direction. The limit slider 61 is positioned between the annular pad 8 and the support rod 41 and is elastically connected to the stop block 44 via the spring 45.

[0044] The support rod 41 has a hinge seat mounting hole 46 in the middle along the horizontal direction. The hinge seat 42 is provided with an integral smooth rod bolt 47. The smooth rod bolt 47 cooperates with the hinge seat mounting hole 46. After the smooth rod bolt 47 on the hinge seat 42 is inserted into the hinge seat mounting hole 44, it is connected to the nut.

[0045] The bottom of the support rod 41 is provided with a sliding column mounting hole 48, and a sliding column 49 is provided in the sliding column mounting hole 48. One end of the sliding column 49 is in transmission cooperation with the adjustment device 2, and the other end of the sliding column 49 is in transmission cooperation with the bottom of the movable arm 5.

[0046] The adjusting device 2 includes an adjusting ring 21, an adjusting ear plate 22, and a plurality of protrusions 23. The number of protrusions 23 is the same as the number of tensioning devices 3. The adjusting ear plate 22 is fixedly disposed on the outer edge of the adjusting ring 21. The protrusions 23 are uniformly fixedly disposed on the inner edge of the adjusting ring 21 along the circumferential direction. The protrusions 23 are disposed corresponding to the tensioning devices 3.

[0047] The base 1 includes a base plate 11 and a plurality of segmented pressure rings 12. The plurality of segmented pressure rings 12 are uniformly fixed on the top of the base plate 11 along the circumferential direction. The segmented pressure rings 12 are arc-shaped structures that cooperate with the outer edge of the adjusting ring 21. The top of the segmented pressure rings 12 is provided with a flange 13 that cooperates with the top limit of the adjusting ring 21.

[0048] The base 1 also includes two ear seats 14, two adjusting bolts 15 and two limiting nuts 16. The two ear seats 14 are respectively disposed on both sides of the adjusting ear plate 22. The bottom of the ear seat 14 is fixedly connected to the top of the base plate 11. The ear seat 14 has a threaded hole in the horizontal direction that cooperates with the adjusting bolt 15. The bolt shank of the adjusting bolt 15 passes through the limiting nut 16 and the threaded hole on the ear seat 14 in sequence and then engages with the adjusting ear plate 22 in a transmission cooperation.

[0049] The principle of this invention is explained as follows:

[0050] In use, the thin-walled ring 7 to be clamped is placed on the annular pad 8. By rotating the adjusting bolt 15, the adjusting bolt 15 pushes the adjusting ear plate 22 to move. At this time, the adjusting ear plate 22 drives the adjusting ring 21 to rotate. After the adjusting ring 21 rotates, the protrusion 23 on its inner edge pushes all the sliding columns 49 to move. The sliding columns 49 drive the movable arm 5 to rotate. The movable arm 5 pushes the tensioning block 6 to open outward, thus tensioning the thin-walled ring 7.

[0051] In this design.

[0052] Example 1:

[0053] A high-precision clamp for large-size gas turbine casing ring clamps includes: a base 1, an adjusting device 2, and multiple tensioning devices 3; multiple tensioning devices 3 are evenly arranged along the circumferential direction on the base 1, and the distance between the multiple tensioning devices 3 and the rotation center of the thin-walled ring 7 is equal; a tensioning block 6 is provided on the top of the tensioning device 3, the outer edge of the tensioning block 6 is arc-shaped to cooperate with the thin-walled ring 7, the bottom of the outer edge of the tensioning block 6 is elastically connected to the tensioning device 3, and the distance between the outer edge of the tensioning block 6 and the rotation center of the thin-walled ring 7 is equal; an adjusting device 2 is provided outside the tensioning device 3, and the adjusting device 2 is simultaneously driven to cooperate with each tensioning block 6; the tensioning device 3 includes a fixed arm 4. The fixed arm 4 is fixedly connected to the bottom of the base 1 and the middle of the fixed arm 4 is hinged to the middle of the movable arm 5. A tension block 6 is provided at the top of the fixed arm 4, with its outer edge elastically connected to the fixed arm 4 and its inner edge engaging with the top of the movable arm 5. The fixed arm 4 includes a support rod 41, a hinge seat 42, and a support plate 43. The support rod 41 is fixedly mounted vertically on the top of the base 1. A hinge seat 42 is fixedly mounted in the middle of the support rod 41, and the middle of the movable arm 5 is hinged to the hinge seat 42. A support plate 43 is fixedly mounted horizontally at the top of the support rod 41. The support plate 43 is a long strip structure. The support plate 43 is arranged along the circumference of the base 1. A stop block 44 is fixedly arranged at the end of the support plate 43 away from the center of the base 1. A tension block 6 is arranged at the end of the support plate 43 near the center of the base 1. The tension block 6 is elastically connected to the stop block 44 by a spring 45. The clamp also includes an annular pad 8. The rotation center of the annular pad 8 coincides with the rotation center of the thin-walled ring 7. The annular pad 8 is arranged directly above each fixed arm 4. The annular pad 8 is fixedly connected to each fixed arm 4. The inner edge of the annular pad 8 is limited to the tension block 6. The stop block 44 and the spring 45 are arranged between the annular pad 8 and the support rod 41. A limit slider 61 is arranged horizontally at the bottom of the tension block 6. The limiting slider 61 is disposed between the annular pad 8 and the support rod 41. The limiting slider 61 is elastically connected to the stop block 44 by a spring 45. The middle part of the support rod 41 has a hinge seat mounting hole 46 in the horizontal direction. The hinge seat 42 is provided with an integral smooth rod bolt 47. The smooth rod bolt 47 cooperates with the hinge seat mounting hole 46. After the smooth rod bolt 47 on the hinge seat 42 is inserted into the hinge seat mounting hole 44, it is connected to the nut. The bottom of the support rod 41 has a sliding column mounting hole 48. A sliding column 49 is provided in the sliding column mounting hole 48. One end of the sliding column 49 is in transmission cooperation with the adjusting device 2, and the other end of the sliding column 49 is in transmission cooperation with the bottom of the movable arm 5.

[0054] Example 2:

[0055] Example 2 is basically the same as Example 1, except that:

[0056] The adjusting device 2 includes an adjusting ring 21, an adjusting ear plate 22, and a plurality of protrusions 23. The number of protrusions 23 is the same as the number of tensioning devices 3. The adjusting ear plate 22 is fixedly disposed on the outer edge of the adjusting ring 21, and the protrusions 23 are evenly fixedly disposed on the inner edge of the adjusting ring 21 along the circumferential direction. The protrusions 23 are disposed corresponding to the tensioning devices 3. The base 1 also includes two ear seats 14, two adjusting bolts 15, and two limiting nuts 16. The two ear seats 14 are respectively disposed on both sides of the adjusting ear plate 22. The bottom of the ear seat 14 is fixedly connected to the top of the base plate 11. The ear seat 14 has a threaded hole in the horizontal direction that mates with the adjusting bolt 15. The bolt shank of the adjusting bolt 15 passes through the limiting nut 16 and the threaded hole on the ear seat 14 in sequence and then engages with the adjusting ear plate 22 in a transmission engagement.

[0057] Example 3:

[0058] Example 3 is basically the same as Example 2, except that:

[0059] The base 1 includes a base plate 11 and a plurality of segmented pressure rings 12. The plurality of segmented pressure rings 12 are uniformly fixed on the top of the base plate 11 along the circumferential direction. The segmented pressure rings 12 are arc-shaped structures that cooperate with the outer edge of the adjusting ring 21. The top of the segmented pressure rings 12 is provided with a flange 13 that cooperates with the top limit of the adjusting ring 21.

[0060] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A high-precision clamp for large-size gas turbine casing ring clamps, characterized in that: The clamp includes: a base (1), an adjustment device (2), and multiple tensioning devices (3); Multiple tensioning devices (3) are evenly arranged along the circumferential direction on the base (1). The distance between the multiple tensioning devices (3) and the rotation center of the thin-walled ring (7) is equal. A tensioning block (6) is provided on the top of the tensioning device (3). The outer edge of the tensioning block (6) is an arc shape that matches the thin-walled ring (7). The bottom of the outer edge of the tensioning block (6) is elastically connected to the tensioning device (3). The distance between the outer edge of the tensioning block (6) and the rotation center of the thin-walled ring (7) is equal. An adjustment device (2) is provided on the outside of the tensioning device (3), and the adjustment device (2) is in transmission cooperation with each tensioning block (6); The tensioning device (3) includes a fixed arm (4) and a movable arm (5). The bottom of the fixed arm (4) is fixedly connected to the top of the base (1). A tensioning block (6) is provided on the top of the fixed arm (4). The outer edge of the tensioning block (6) is elastically connected to the fixed arm (4). The inner edge of the tensioning block (6) is in transmission cooperation with the top of the movable arm (5). The fixed arm (4) includes a support rod (41), a hinge seat (42), and a support plate (43). The support rod (41) is fixedly installed on the top of the base (1) in the vertical direction. The hinge seat (42) is fixedly installed in the middle of the support rod (41). The middle of the movable arm (5) is hinged to the hinge seat (42). The support plate (43) is fixedly installed on the top of the support rod (41) in the horizontal direction. The support plate (43) is a long strip structure. The support plate (43) is arranged along the circumference of the base (1). A stop block (44) is fixedly installed on the end of the support plate (43) away from the center of the base (1). A tension block (6) is installed on the end of the support plate (43) close to the center of the base (1). The tension block (6) is elastically connected to the stop block (44) through a spring (45). The bottom of the support rod (41) is provided with a sliding column mounting hole (48), and a sliding column (49) is provided in the sliding column mounting hole (48). One end of the sliding column (49) is connected to the adjustment device (2) for transmission, and the other end of the sliding column (49) is connected to the bottom of the movable arm (5) for transmission. The adjustment device (2) includes an adjustment ring (21), an adjustment ear plate (22), and a plurality of protrusions (23). The number of protrusions (23) is the same as the number of tensioning devices (3). The adjustment ear plate (22) is fixedly disposed on the outer edge of the adjustment ring (21). The protrusions (23) are uniformly fixedly disposed on the inner edge of the adjustment ring (21) along the circumferential direction. The protrusions (23) are disposed corresponding to the tensioning devices (3).

2. A high-precision clamp for a large-size gas turbine casing ring as described in claim 1, characterized in that: The clamp also includes an annular pad (8), the rotation center of which coincides with the rotation center of the thin-walled ring (7). The annular pad (8) is positioned directly above each fixed arm (4), and is fixedly connected to each fixed arm (4). The inner edge of the annular pad (8) is limited to the tension block (6). The stop block (44) and spring (45) are positioned between the annular pad (8) and the support rod (41). The bottom of the tension block (6) is provided with a limit slider (61) in the horizontal direction. The limit slider (61) is positioned between the annular pad (8) and the support rod (41). The limit slider (61) is elastically connected to the stop block (44) through the spring (45).

3. A high-precision clamp for a large-size gas turbine casing ring clamp according to claim 2, characterized in that: The support rod (41) has a hinge seat mounting hole (46) in the middle along the horizontal direction. The hinge seat (42) is provided with an integral smooth rod bolt (47). The smooth rod bolt (47) cooperates with the hinge seat mounting hole (46). After the smooth rod bolt (47) on the hinge seat (42) is inserted into the hinge seat mounting hole (46), it is connected to the nut.

4. A high-precision clamp for a large-size gas turbine casing ring as described in claim 3, characterized in that: The base (1) includes a base plate (11) and multiple segmented pressure rings (12). The multiple segmented pressure rings (12) are uniformly fixed on the top of the base plate (11) along the circumferential direction. The segmented pressure rings (12) are arc-shaped structures that cooperate with the outer edge of the adjusting ring (21). The top of the segmented pressure rings (12) is provided with a flange (13) that cooperates with the top limit of the adjusting ring (21).

5. A high-precision clamp for a large-size gas turbine casing ring clamp according to claim 4, characterized in that: The base (1) also includes two ear seats (14), two adjusting bolts (15) and two limiting nuts (16). The two ear seats (14) are respectively disposed on both sides of the adjusting ear plate (22). The bottom of the ear seat (14) is fixedly connected to the top of the base plate (11). The ear seat (14) has a threaded hole that cooperates with the adjusting bolt (15) along the horizontal direction. The bolt rod of the adjusting bolt (15) passes through the limiting nut (16) and the threaded hole on the ear seat (14) in sequence and then engages with the adjusting ear plate (22) in a transmission cooperation.

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