A fatigue testing device for high temperature alloy sealing springs for aircraft engines

Abstract

The present invention discloses a fatigue test device for a high-temperature alloy sealing spring for an aero-engine, which relates to the technical field of spring fatigue testing, and aims to solve the technical problem that the test content of the existing fatigue testing machine is relatively single, and it is difficult to perform fatigue testing on the torsional force and bending force to which the spring is subjected. The device comprises a workbench, a push-pull assembly and a reciprocating drive assembly are arranged on the top of the workbench, a positioning assembly is arranged between the push-pull assembly and the reciprocating drive assembly, and an adjustment assembly is arranged at the bottom of the workbench. The reciprocating drive assembly is used to apply a reciprocating torsional force or a reciprocating bending force to the test spring, and perform a torsional force fatigue test or a bending force fatigue test on the test spring. The present invention has the advantages of being able to perform elastic fatigue test, torsional fatigue test and bending force fatigue test on the test spring respectively, and simulating the tensile, compressive, torsional and bending forces that the test spring may be subjected to in actual applications.

Description

Technical Field

[0001] The present invention relates to the technical field of spring fatigue testing, and more particularly to a fatigue testing device for a high-temperature alloy sealing spring used in an aerospace engine. Background Art

[0002] High-temperature alloy sealing springs play a key role in the sealing systems of the combustion chamber, turbine, tail nozzle and other parts of aircraft engines, as well as the turbopump, thrust chamber and other high-temperature components of aerospace engines. They can ensure the reliable sealing of the engine under extreme conditions such as high temperature, high pressure and high speed, and ensure flight safety. In the actual working environment, high-temperature alloy sealing springs are mainly subjected to repeated tensile and compressive forces caused by factors such as the relative movement of engine components and pressure changes. For example, during engine operation, as the temperature and pressure change periodically, the sealing spring needs to continuously adjust its own length to maintain the sealing effect, which leads to repeated stretching and compression of the spring.

[0003] In fatigue testing, a fatigue testing machine is typically used to repeatedly stretch and compress a spring to simulate its actual working conditions and achieve the purpose of fatigue testing. Although stretching and compression are the primary forces acting on a spring, in some special cases, the spring may also be subject to secondary forces, such as torsional or bending forces. These forces may be caused by abnormal vibrations within the engine, component installation errors, or unexpected mechanical interference. Existing fatigue testing machines have relatively limited test content and are difficult to perform fatigue testing on springs subjected to torsional and bending forces. In view of this, we propose a fatigue testing device for high-temperature alloy sealing springs used in aircraft engines. Summary of the Invention

[0004] The purpose of the present invention is to provide a fatigue testing device for high-temperature alloy sealing springs for aircraft engines, so as to solve the technical problem that the test content of existing fatigue testing machines is relatively single and it is difficult to perform fatigue testing on the torsional force and bending force exerted on the spring.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A fatigue testing device for a high-temperature alloy sealing spring for an aero-engine, comprising a workbench, a push-pull assembly and a reciprocating drive assembly arranged on the top of the workbench, a positioning assembly arranged between the push-pull assembly and the reciprocating drive assembly, and an adjustment assembly arranged at the bottom of the workbench, the adjustment assembly being used to adjust the position of the reciprocating drive assembly; the positioning assembly being used to position and fix the test spring; the push-pull assembly being used to repeatedly stretch and compress the test spring to perform an elastic fatigue test; the reciprocating drive assembly being used to apply a reciprocating torsional force or a reciprocating bending force to the test spring; when the reciprocating drive assembly applies a reciprocating torsional force to the test spring, it is used to perform a torsional fatigue test on the test spring; when the reciprocating drive assembly applies a reciprocating bending force to the test spring, it is used to perform a bending fatigue test on the test spring.

[0006] Preferably, it is characterized in that the push-pull assembly includes a motor frame, a support frame 1 and multiple support frames 2 arranged on the top of the workbench, a rotating motor 1 is arranged on the top of the motor frame, the output end of the rotating motor 1 is connected to a rotating column 1, the rotating column 1 is rotatably connected to the upper side wall of the support frame 1, the circumferential outer wall of the rotating column 1 is connected to two active pulleys, the active pulley is connected to the driven pulley through a toothed belt, the driven pulley is rotatably connected to the upper side wall of the support frame 2, the driven pulley is coaxially connected to the rotating plate, the side wall of the rotating plate is connected to the fixed column, the circumferential side wall of the fixed column is movably arranged with a connecting rod, the other end of the connecting rod is rotatably connected to a push-pull rod, the push-pull rod body is penetrated by a fixed seat, the push-pull rod is movably matched with the fixed seat, and the fixed seat is arranged on the top of the workbench.

[0007] The top of the gear train is equipped with a gear that is engaged with the gear of the gear train and is connected with the gear of the gear train by the gear train, and the bottom of the gear train is equipped with a gear that is engaged with the gear of the gear train and is connected with the gear of the gear train to form a gear.

[0008] Preferably, it is characterized in that the reciprocating drive assembly includes a fixed frame arranged on the top surface of the movable plate, the top surface of the fixed frame is connected to a frame, a fixed plate 1 and a fixed plate 2, the top surface of the fixed frame is also arranged with a rotating motor 2, the output end of the rotating motor 2 is connected with a rotating column 2, the rotating column 2 passes through a side wall of the fixed plate, the rotating column 2 rotates with the side wall of the fixed plate, the two ends of the rotating column are connected with an adjustment plate, the side wall of the adjustment plate is provided with an adjustment slot, and an adjustment rod is arranged in the adjustment slot.

[0009] Preferably, it is characterized in that the upper side wall of the frame is connected to a fixing rod, the circumferential outer wall of the fixing rod is sleeved with a rotating cylinder, the rotating cylinder is rotatably matched with the fixing rod, and the outer side wall of the rotating cylinder is connected to a long plate and a triangular plate; wherein, the side wall of the long plate is provided with a long groove, and the adjusting rod is arranged in the long groove; the bottom surface of the triangular plate is a circular arc curved surface structure, and the bottom surface of the triangular plate is also provided with a plurality of tooth grooves.

[0010] Preferably, it is characterized in that the upper side wall of the second fixed plate is rotatably connected to a second gear, the second gear is meshed with multiple teeth on the bottom surface of the triangular plate, the second gear is coaxially connected to a driving block, and the side wall of the driving block is integrally formed with a driving plate.

[0011] The U-shaped post is fixed on the top of the driving plate, and the U-shaped post is inserted into the top surface of the frame plate, and the U-shaped post is inserted into the driving block. The U-shaped post is inserted into the frame plate and cooperates with the frame plate and the driving block. The limiting block is arranged on the outer wall of the circumference of the U-shaped post, and the bottom surface of the limiting block is set to an arc surface structure that matches the shape of the top surface of the driving block. The rod body of the U-shaped post is sleeved with an elastic spring, and the elastic spring is arranged between the frame plate and the limiting block; the top surface of the driving plate is provided with a U-shaped post two, and the U-shaped post two and the U-shaped post one have the same structural components, wherein the circumferential outer wall of the U-shaped post two is provided with a limiting block two, and the limiting block two is a circular plate structure.

[0012] Preferably, it is characterized in that the adjusting plate is a long strip of plate-like structure, the inner side wall of the adjusting groove is provided with a plurality of grooves, the side wall of the adjusting rod is provided with a circular groove, a threaded hole is provided in the circular groove, the adjusting rod is threadedly connected to a threaded column through the threaded hole, the outer circumferential wall of the threaded column is connected to a push plate that fits the circular groove, the other end of the threaded column is connected to a rotating handle, the column body of the threaded column located between the push plate and the rotating handle is a smooth column, the outer circumferential wall of the threaded column is movably sleeved with an adjusting block, the adjusting block is arranged between the push plate and the rotating handle, the side wall of the adjusting block is connected with a plurality of convex plates that fit into the grooves, and the adjusting block is plug-fitted into the adjusting groove through the convex plate.

[0013] Preferably, it is characterized in that the positioning assembly includes a first positioning block, a second positioning block and a plurality of positioning plug-ins, the side wall of the first positioning block is connected to the end of the push-pull rod, the side wall of the second positioning block is provided with a T-shaped protrusion 1 that fits with the T-slot 1, the second positioning block slides with the T-slot 1 through the T-shaped protrusion 1, and the T-shaped protrusion 1 is provided with a plurality of sockets that fit with the column body of the U-shaped plug-in column 1 from top to bottom; the side wall of the first positioning block is provided with a T-slot 2, the side wall of the first positioning block is connected to a sealing plate through screws and nuts, and the side wall of the second positioning block is arranged with the same structural components as the side wall of the first positioning block; the side wall of the positioning plug-in is connected with a T-shaped protrusion 2 that fits with the T-slot 2, the positioning plug-in is plug-fitted with the T-slot 2 through the T-shaped protrusion 2, and the positioning plug-in is used to be welded at the end of the test spring to fix the test spring.

[0014] A method for using a fatigue testing device for a high-temperature alloy sealing spring for an aerospace engine comprises the following steps:

[0015] S1. Fix the test spring by welding the two ends of the test spring to the side walls of the positioning block, inserting the T-shaped protrusions 2 on the side walls of the two positioning blocks into the T-shaped slots 2 of the first positioning block and the second positioning block, respectively. Then, fix the two sealing plates to the side walls of the first positioning block and the second positioning block respectively using screws and nuts to form a confining effect on the T-shaped slots 2, thereby fixing the two positioning blocks and the test spring.

[0016] S2. If the fatigue testing device is used to perform an elastic fatigue test on the test spring, by pulling the U-shaped plug-in column 1 upward, the T-shaped slot 1 inside the driving block is unobstructed, and then the T-shaped protrusion 1 on the side wall of the second positioning block slides into the driving block along the T-shaped slot 1, and then the U-shaped plug-in column 1 is released, and the second positioning block is fine-tuned to make the U-shaped plug-in column 1 inserted into the insertion hole. The U-shaped plug-in column 1 is subjected to the elastic force of the elastic spring and always remains in the state of being inserted into the insertion hole, thereby forming a positioning and fixing effect on the second positioning block, and then the two active pulleys are driven to rotate by the rotating motor 1, and the active pulley drives the driven pulley to rotate through the toothed belt, so that the rotating plate rotates following the axis of the driven pulley, and further drives the fixed column to perform a circular motion, so that the connecting rod pushes and pulls the push-pull rod, and the push-pull rod pushes and pulls the first positioning block, and the first positioning block cooperates with the second positioning block to repeatedly stretch and compress the test spring to perform an elastic fatigue test on the test spring;

[0017] S3. If the fatigue testing device is used to perform a torsional fatigue test on a test spring, after completing the positioning and fixing operation of the second positioning block through the operation of S2, the second rotating motor drives the second rotating column to rotate, the second rotating column drives the adjustment plate to rotate, the adjustment rod on the adjustment plate follows the adjustment plate to perform a circular motion, the adjustment rod drives the long plate to perform a reciprocating swing motion, the triangular plate follows the long plate to perform a reciprocating swing motion, the multiple teeth on the bottom surface of the triangular plate drive the second gear to perform a reciprocating rotation motion, the second gear drives the coaxially connected driving block to perform a reciprocating rotation motion, the driving block drives the second positioning block to perform a reciprocating rotation motion, the second positioning block generates a reciprocating torsional force on the test spring through the positioning plug, thereby realizing a torsional fatigue test operation on the test spring;

[0018] S4. If the fatigue testing device is used to perform bending force fatigue testing on the test spring, after completing S1 operation, the hydraulic cylinder is used to push the tooth plate to slide forward on the sliding convex strip, and the tooth plate drives the gear 1 to rotate, and further drives the movable plate to slide in the arc groove on the top surface of the arc plate, and the movable plate drives the reciprocating drive assembly to follow the movement, so that the U-shaped plug-in column 2 is aligned with the first positioning block, and then the U-shaped plug-in column 2 is pulled upward to make the T-shaped slot 1 inside the driving plate unobstructed, and then the T-shaped protrusion 1 on the side wall of the second positioning block is moved along the T-shaped slot. Slot one slides into the driving plate, then releases the U-shaped pin two, and fine-tunes the second positioning block so that the U-shaped pin two is inserted into the socket to complete the positioning and fixing operation of the second positioning block. At this time, by rotating the motor two, the driving block is driven to perform reciprocating rotational motion, and the driving block drives the driving plate to perform reciprocating swinging motion around the driving block. The driving plate drives the second positioning block to perform reciprocating swinging motion around the driving block. The second positioning block generates a reciprocating bending force on the test spring through the positioning plug, thereby realizing a bending force fatigue test operation on the test spring.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention is capable of repeatedly stretching and compressing the test spring by designing a push-pull component, and the reciprocating drive component is capable of applying reciprocating torsional force or reciprocating bending force to the test spring, thereby realizing elastic fatigue test, torsional fatigue test and bending fatigue test on the test spring respectively, simulating the tensile, compression, torsional and bending forces that the test spring may be subjected to in actual application, and performing fatigue tests on the different types of forces to which the test spring is subjected, reflecting the true performance of the test spring and ensuring its safety and reliability in high-demand application scenarios such as aircraft engines.

[0021] 2. The present invention also rotates the rotary handle to move the threaded column outward in the threaded hole of the adjusting rod, so that the push plate drives the adjusting block to move out of the adjusting slot, and then adjusts the position of the adjusting rod on the side of the adjusting plate, and then rotates the rotary handle to move the threaded column inward in the threaded hole of the adjusting rod, so that the rotary handle drives the adjusting block to move into the adjusting slot, and the convex plate of the adjusting block is inserted into the groove of the inner side wall of the adjusting slot to form a plug-in connection, so that the adjusting rod is fixed to the side wall of the adjusting plate. In this way, the radius of the circular motion of the adjusting rod can be changed, and then the swing amplitude of the long plate and the triangular plate can be changed, so as to achieve the amplitude of the reciprocating rotation motion of the adjusting drive block and the amplitude of the reciprocating swing motion of the driving plate, further adjusting the strength of the torsional force or bending force applied to the test spring, and the intensity of the torsional fatigue test and the bending fatigue test of the test spring can be adjusted according to actual conditions.

[0022] 3. The present invention also arranges a U-shaped plug-in column 1 above the driving block and a U-shaped plug-in column 2 on the top surface of the driving plate. When the test spring is subjected to an elastic fatigue test or a torsional fatigue test, the U-shaped plug-in column 1 is pulled upward to make the T-shaped slot 1 inside the driving block unobstructed, and then the T-shaped protrusion 1 on the side wall of the second positioning block slides into the driving block along the T-shaped slot 1, and then the U-shaped plug-in column 1 is loosened and the second positioning block is fine-tuned to make the U-shaped plug-in column 1 inserted into the insertion hole. The U-shaped plug-in column 1 is subjected to the elastic force of the elastic spring and always remains inserted into the insertion hole, thereby forming a positioning and fixing effect on the second positioning block ... When performing a bending force fatigue test, the position of the reciprocating drive assembly is adjusted through the adjustment assembly to align the U-shaped pin two with the first positioning block, and then the U-shaped pin two is pulled upward to make the T-slot one inside the drive plate unobstructed, and then the T-shaped protrusion one on the side wall of the second positioning block is slid into the drive plate along the T-slot one, and then the U-shaped pin two is released, and the second positioning block is fine-tuned to insert the U-shaped pin two into the socket, so as to position and fix the second positioning block, thereby ensuring that the test spring can remain stable and firm on the positioning assembly during the fatigue test of the test spring, avoiding shaking or falling off, and improving the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram showing the overall structure of the present invention from a first perspective;

[0024] Figure 2 This is a second perspective diagram of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the push-pull assembly structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the regulating component of the present invention;

[0027] Figure 5 This is a schematic diagram of the bottom structure of the movable plate of the present invention;

[0028] Figure 6 A schematic diagram showing the structure of the reciprocating drive assembly of the present invention from a first perspective;

[0029] Figure 7 A schematic diagram of the reciprocating drive assembly structure from a second perspective of the present invention;

[0030] Figure 8 This is a schematic diagram of the split structure of the frame and the drum of the present invention;

[0031] Figure 9 Schematic diagram of the structure of the driving block and driving plate of the present invention;

[0032] Figure 10 This is a schematic structural diagram of the U-shaped plug post 1 and the U-shaped plug post 2 of the present invention;

[0033] Figure 11 Schematic diagram of the structure of the adjustment plate of the present invention;

[0034] Figure 12 This is a schematic diagram of the split structure of the threaded column and the adjusting rod of the present invention;

[0035] Figure 13 It is a schematic diagram of the structure of the adjusting rod of the present invention;

[0036] Figure 14 This is a schematic diagram of the split structure of the adjustment block and the threaded column of the present invention;

[0037] Figure 15 It is a schematic structural diagram of the positioning component of the present invention;

[0038] Figure 16 This is a schematic diagram of the split structure of the positioning component of the present invention;

[0039] Figure 17 This is a schematic diagram of a usage state of the present invention.

[0040] Description of the numbers in the figure:

[0041] 1. Workbench; 2. Push-pull assembly; 3. Reciprocating drive assembly; 4. Positioning assembly; 5. Adjustment assembly; 6. Test spring;

[0042] 201. Motor frame; 202. Support frame 1; 203. Support frame 2; 204. Rotating motor 1; 205. Rotating column 1; 206. Driving pulley; 207. Toothed belt; 208. Driven pulley; 209. Rotating plate; 210. Fixed column; 211. Connecting rod; 212. Push-pull rod; 213. Fixed seat;

[0043] 301. Fixing frame; 302. Frame; 303. Fixing plate 1; 304. Fixing plate 2; 305. Rotating motor 2; 306. Rotating column 2; 307. Adjusting plate; 308. Adjusting slot; 309. Adjusting rod; 310. Fixing rod; 311. Rotating drum; 312. Long plate; 313. Triangular plate; 314. Long slot; 315. Gear 2; 316. Driving block; 317. Driving plate; 318. T-slot 1; 319. Frame plate; 320. U-shaped plug 1; 321. Limiting block 1; 322. Elastic spring; 323. U-shaped plug 2; 324. Limiting block 2; 325. Groove; 326. Circular groove; 327. Threaded column; 328. Push plate; 329. Rotating handle; 330. Adjusting block; 331. Protruding plate;

[0044] 401, first positioning block; 402, second positioning block; 403, positioning plug; 404, T-shaped protrusion 1; 405, insertion hole; 406, T-shaped slot 2; 407, slot sealing plate; 408, T-shaped protrusion 2;

[0045] 501, support plate; 502, hydraulic cylinder; 503, sliding ridge; 504, tooth plate; 505, gear 1; 506, rotating frame; 507, moving plate; 508, arc plate; 509, arc groove; 510, arc slide. DETAILED DESCRIPTION

[0046] like Figures 1 to 17 As shown, the present invention relates to a fatigue testing device for a high-temperature alloy sealing spring for an aircraft engine, comprising a workbench 1, a push-pull assembly 2 and a reciprocating drive assembly 3 arranged on the top of the workbench 1, a positioning assembly 4 arranged between the push-pull assembly 2 and the reciprocating drive assembly 3, and an adjustment assembly 5 arranged at the bottom of the workbench 1.

[0047] In an embodiment of the present invention, the adjustment component 5 is used to adjust the position of the reciprocating drive component 3; the positioning component 4 is used to position and fix the test spring 6; the push-pull component 2 is used to repeatedly stretch and compress the test spring 6 to perform an elastic fatigue test; the reciprocating drive component 3 is used to apply a reciprocating torsional force or a reciprocating bending force to the test spring 6; when the reciprocating drive component 3 applies a reciprocating torsional force to the test spring 6, it is used to perform a torsional fatigue test on the test spring 6; when the reciprocating drive component 3 applies a reciprocating bending force to the test spring 6, it is used to perform a bending fatigue test on the test spring 6; this embodiment of the present invention comprises: The invention is capable of repeatedly stretching and compressing the test spring 6 by designing the push-pull component 2, and the reciprocating drive component 3 is capable of applying reciprocating torsional force or reciprocating bending force to the test spring 6, and can perform elastic fatigue test, torsional fatigue test and bending fatigue test on the test spring 6 respectively, simulating the tensile, compression, torsional and bending forces that the test spring 6 may be subjected to in actual applications, and performing fatigue tests on the different types of forces to which the test spring 6 is subjected, reflecting the true performance of the test spring 6 and ensuring its safety and reliability in high-demand application scenarios such as aircraft engines.

[0048] In an embodiment of the present invention, the push-pull assembly 2 includes a motor frame 201, a support frame 1 202 and two support frames 203 arranged on the top of the workbench 1, a rotating motor 1 204 is arranged on the top of the motor frame 201, and the output end of the rotating motor 1 204 is connected to a rotating column 1 205, and the rotating column 1 205 is rotatably connected to the upper side wall of the support frame 1 202. The outer wall of the rotating column 1 205 is connected to two active pulleys 206, and the active pulley 206 is connected to the driven pulley 208 through a toothed belt 207. The driven pulley 208 is rotatably connected to the upper side wall of the support frame 203, and the driven pulley 208 is coaxially connected to a rotating plate 209. The rotating plate 209 side The wall is connected to a fixed column 210, and a connecting rod 211 is movably arranged on the circumferential side wall of the fixed column 210. The other end of the connecting rod 211 is rotatably connected to a push-pull rod 212. The push-pull rod 212 has a fixed seat 213 running through the rod body. The push-pull rod 212 and the fixed seat 213 are movably cooperated. The fixed seat 213 is arranged on the top of the workbench 1, and drives the two active pulleys 206 to rotate by rotating the motor 1 204. The active pulley 206 drives the driven pulley 208 to rotate through the toothed belt 207, so that the rotating plate 209 rotates with the axis of the driven pulley 208, and further drives the fixed column 210 to perform a circular motion, so that the connecting rod 211 pushes and pulls the push-pull rod 212.

[0049] In an embodiment of the present invention, the adjustment component 5 includes a support plate 501 arranged at the bottom of the workbench 1, the support plate 501 is connected to the inner wall of the workbench 1, a hydraulic cylinder 502 and a sliding ridge 503 are arranged on the top surface of the support plate 501, the output end of the hydraulic cylinder 502 is connected to a tooth plate 504, the bottom surface of the tooth plate 504 is provided with a slide groove that fits with the sliding ridge 503, the tooth plate 504 slides with the sliding ridge 503 through the slide groove, the top surface of the support plate 501 is rotatably connected to a gear 1 505, the side wall of the tooth plate 504 is provided with a tooth groove that meshes with the gear 1 505, the gear 1 505 is coaxially connected to a rotating frame 506, the rotating frame 506 is arranged above the workbench 1, the side wall of the rotating frame 506 is connected to a movable plate 507, and a movable plate 507 is arranged below the movable plate 507. The curved plate 508 is connected to the top surface of the workbench 1, and an arc groove 509 is provided on the top surface of the curved plate 508. The bottom surface of the movable plate 507 is provided with an arc slide 510 that slides with the arc groove 509. The movable plate 507 slides with the curved plate 508 through the arc slide 510. The movable plate 507 is used to drive the reciprocating drive component 3 to move synchronously and adjust the position of the reciprocating drive component 3; the hydraulic cylinder 502 works to push the tooth plate 504 to slide forward on the sliding protrusion 503, and the tooth plate 504 drives the gear 1 505 to rotate, further driving the movable plate 507 to slide in the arc groove 509 on the top surface of the curved plate 508, and the movable plate 507 drives the reciprocating drive component 3 to follow the movement, thereby achieving the effect of adjusting the position of the reciprocating drive component 3.

[0050] In an embodiment of the present invention, the reciprocating drive assembly 3 includes a fixed frame 301 arranged on the top surface of the movable plate 507. The top surface of the fixed frame 301 is connected to the frame 302, the fixed plate 1 303 and the fixed plate 2 304. The top surface of the fixed frame 301 is also arranged with a rotating motor 2 305. The output end of the rotating motor 2 305 is connected to a rotating column 2 306. The rotating column 2 306 passes through the side wall of the fixed plate 1 303. The rotating column 2 306 rotates with the side wall of the fixed plate 1 303. The end of the rotating column 2 306 is connected to an adjusting plate 307. The side wall of the adjusting plate 307 is provided with an adjusting slot 308, and an adjusting rod 309 is arranged in the adjusting slot 308.

[0051] The screw threaded rod 309 is provided with a plurality of grooves 325 on the inner wall of the adjusting groove 308, and a circular groove 326 is provided on the side wall of the adjusting rod 309. A threaded hole is provided in the circular groove 326, and the adjusting rod 309 is threadedly connected to a threaded column 327 through the threaded hole. The outer wall of the threaded column 327 is connected to a push plate 328 that fits with the circular groove 326, and the other end of the threaded column 327 is connected to a rotating handle 329. The column body of the threaded column 327 located between the push plate 328 and the rotating handle 329 is a smooth column. The outer wall of the threaded column 327 is movably sleeved with an adjusting block 330. The adjusting block 330 is arranged between the push plate 328 and the rotating handle 329. The side wall of the adjusting block 330 is connected with a plurality of convex plates 331 that fit with the grooves 325. The adjusting block 330 is plugged into the adjusting groove 308 through the convex plates 331.

[0052] Furthermore, the upper side wall of the frame 302 is connected to a fixed rod 310, and a rotating cylinder 311 is sleeved on the outer circumference of the fixed rod 310. The rotating cylinder 311 rotates with the fixed rod 310. The outer side wall of the rotating cylinder 311 is connected to a long plate 312 and a triangular plate 313. The side wall of the long plate 312 is provided with a long groove 314, and the adjustment rod 309 is arranged in the long groove 314. The bottom surface of the triangular plate 313 has an arc-shaped curved surface structure and is also provided with a plurality of tooth grooves.

[0053] The present invention rotates the rotary handle 329 to move the threaded column 327 outward in the threaded hole of the adjustment rod 309, so that the push plate 328 drives the adjustment block 330 to move out of the adjustment groove 308, and then adjusts the position of the adjustment rod 309 on the side of the adjustment plate 307. Then, by rotating the rotary handle 329, the threaded column 327 moves inward in the threaded hole of the adjustment rod 309, so that the rotary handle 329 drives the adjustment block 330 to move into the adjustment groove 308, and the convex plate 331 of the adjustment block 330 is inserted into the groove 331 on the inner wall of the adjustment groove 308. 25, a plug connection is formed so that the adjusting rod 309 is fixed to the side wall of the adjusting plate 307. In this way, the radius of the circular motion of the adjusting rod 309 can be changed, thereby changing the swing amplitude of the long strip plate 312 and the triangular plate 313, so as to adjust the amplitude of the reciprocating rotation motion of the driving block 316 and the amplitude of the reciprocating swing motion of the driving plate 317, further adjusting the intensity of the torsional force or bending force applied to the test spring 6. According to actual conditions, the intensity of the torsional fatigue test and the bending fatigue test on the test spring 6 can be adjusted.

[0054] In the embodiment of the present invention, the upper side wall of the fixing plate 304 is rotatably connected to the gear 2 315, and the gear 2 315 is meshed with multiple teeth on the bottom surface of the triangular plate 313. The gear 2 315 is coaxially connected to the driving block 316. The side wall of the driving block 316 is integrally formed with a driving plate 317. The driving plate 317 is a circular arc plate structure. The side wall of the driving plate 317 is provided with a T-shaped slot 1 318, and the T-shaped slot 1 318 extends to the side wall of the driving block 316; the top surface of the driving block 316 is connected to the frame plate 319, and the top surface of the frame plate 319 is inserted with a U-shaped plug 1 320. The U-shaped plug 1 320 passes through the interior of the driving block 316. The U-shaped plug 1 320 passes through the interior of the driving block 316. 20 is plugged into and matched with the frame plate 319 and the driving block 316. A limiting block 321 is arranged on the outer circumference of the U-shaped plug post 1 320. The bottom surface of the limiting block 1 321 is set to an arc surface structure that matches the shape of the top surface of the driving block 316. The rod body of the U-shaped plug post 1 320 is sleeved with an elastic spring 322. The elastic spring 322 is arranged between the frame plate 319 and the limiting block 1 321; the top surface of the driving plate 317 is arranged with a U-shaped plug post 2 323. The U-shaped plug post 2 323 has the same structural components as the U-shaped plug post 1 320, wherein a limiting block 2 324 is arranged on the outer circumference of the U-shaped plug post 2 323. The limiting block 2 324 is a circular plate-shaped structure;

[0055] Furthermore, the positioning assembly 4 includes a first positioning block 401, a second positioning block 402 and a plurality of positioning plugs 403. The side wall of the first positioning block 401 is connected to the end of the push-pull rod 212. The side wall of the second positioning block 402 is provided with a T-shaped protrusion 404 that fits with the T-slot 1 318. The second positioning block 402 slides with the T-slot 1 318 through the T-shaped protrusion 1 404. The T-shaped protrusion 1 404 is provided with a plurality of sockets 405 that fit with the column body of the U-shaped plug 1 320 from top to bottom; the side wall of the first positioning block 401 is provided with a T-slot 2 406. The side wall of the first positioning block 401 is connected to a sealing plate 407 through screws and nuts. The side wall of the second positioning block 402 is arranged with the same structural components as the side wall of the first positioning block 401; the side wall of the positioning plug 403 is connected with a T-shaped protrusion 2 408 that fits with the T-slot 2 406. The positioning plug 403 is plugged into the T-slot 2 406 through the T-shaped protrusion 2 408. The positioning plug 403 is used to be welded at the end of the test spring 6 to fix the test spring 6; by welding the two ends of the test spring 6 to the side walls of the positioning plug 403 respectively, and then inserting the T-shaped protrusions 2 408 on the side walls of the two positioning plugs 403 into the T-slot 2 406 of the first positioning block 401 and the second positioning block 402 respectively, and then fixing the two sealing plates 407 to the side walls of the first positioning block 401 and the second positioning block 402 respectively by screws and nuts, forming a confining effect on the T-slot 2 406, so that the two positioning plugs 403 are respectively fixed on the first positioning block 401 and the second positioning block 402, thereby achieving the effect of positioning and fixing the test spring 6, and ensuring that the test spring 6 can be fatigue tested more stably and firmly.

[0056] The present invention arranges a U-shaped plug-in post 1 320 above the driving block 316 and arranges a U-shaped plug-in post 2 323 on the top surface of the driving plate 317. When the test spring 6 is subjected to an elastic fatigue test or a torsional fatigue test, the U-shaped plug-in post 1 320 is pulled upward to make the T-shaped slot 1 318 inside the driving block 316 unobstructed, and then the T-shaped protrusion 1 404 on the side wall of the second positioning block 402 is slid into the driving block 316 along the T-shaped slot 1 318, and then the U-shaped plug-in post 1 320 is loosened, and the second positioning block 402 is fine-tuned to make the U-shaped plug-in post 1 320 inserted into the socket 405. The U-shaped plug-in post 1 320 is subjected to the elastic force of the elastic spring 322 and always remains inserted into the socket 405, thereby forming a positioning and fixing effect on the second positioning block 402. When the spring 6 is subjected to a bending force fatigue test, the position of the reciprocating drive assembly 3 is adjusted by the adjustment assembly 5 so that the U-shaped pin 2 323 is aligned with the first positioning block 401, and then the U-shaped pin 2 323 is pulled upward to make the T-slot 1 318 inside the drive plate 317 unobstructed, and then the T-shaped protrusion 1 404 on the side wall of the second positioning block 402 is slid into the drive plate 317 along the T-slot 1 318, and then the U-shaped pin 2 323 is released, and the second positioning block 402 is fine-tuned so that the U-shaped pin 2 323 is inserted into the socket 405, so as to position and fix the second positioning block 402, thereby ensuring that the test spring 6 can remain stable and firm on the positioning assembly 4 when the fatigue test is carried out, avoiding shaking or falling off, and improving the stability of the test.

[0057] As another embodiment of the present invention, a method for using a fatigue testing device for a high-temperature alloy sealing spring for an aircraft engine includes the following steps:

[0058] S1. Fix the test spring 6 by welding the two ends of the test spring 6 to the side walls of the positioning block 403, inserting the second T-shaped protrusions 408 on the side walls of the two positioning blocks 403 into the second T-shaped slots 406 of the first positioning block 401 and the second positioning block 402, respectively. Then, fix the two sealing plates 407 to the side walls of the first positioning block 401 and the second positioning block 402 with screws and nuts, respectively, to enclose the second T-shaped slots 406, thereby fixing the two positioning blocks 403 and the test spring 6.

[0059] S2. If the fatigue testing device is used to perform an elastic fatigue test on the test spring 6, the U-shaped plug-in column 320 is pulled upward to make the T-shaped slot 318 inside the driving block 316 unobstructed, and then the T-shaped protrusion 404 on the side wall of the second positioning block 402 is slid into the driving block 316 along the T-shaped slot 318. Then, the U-shaped plug-in column 320 is released, and the second positioning block 402 is fine-tuned to make the U-shaped plug-in column 320 inserted into the socket 405. The U-shaped plug-in column 320 is subjected to the elastic force of the elastic spring 322 and always remains inserted into the socket 405, thereby adjusting the second positioning block 40 2 forms a positioning and fixing effect, and then the motor 1 204 is driven to rotate the two active pulleys 206, and the active pulley 206 drives the driven pulley 208 to rotate through the toothed belt 207, so that the rotating plate 209 rotates along the axis of the driven pulley 208, and further drives the fixed column 210 to perform a circular motion, so that the connecting rod 211 pushes and pulls the push-pull rod 212, and the push-pull rod 212 pushes and pulls the first positioning block 401. The first positioning block 401 cooperates with the second positioning block 402 to repeatedly stretch and compress the test spring 6, and perform an elastic fatigue test on the test spring 6;

[0060] S3. If the fatigue testing device is used to perform a torsional fatigue test on the test spring 6, after the positioning and fixing operation of the second positioning block 402 is completed through the operation of S2, the second rotating motor 305 is driven to rotate the second rotating column 306, and the second rotating column 306 drives the adjustment plate 307 to rotate. The adjustment rod 309 on the adjustment plate 307 follows the adjustment plate 307 to perform a circular motion, and the adjustment rod 309 drives the long plate 312 to perform a reciprocating swing motion, and the triangular plate 313 follows the long plate 312 to perform a reciprocating swing motion, and the multiple teeth on the bottom surface of the triangular plate 313 drive the second gear 315 to perform a reciprocating rotation motion, and the second gear 315 drives the coaxially connected driving block 316 to perform a reciprocating rotation motion, and the driving block 316 drives the second positioning block 402 to perform a reciprocating rotation motion, and the second positioning block 402 generates a reciprocating torsional force on the test spring 6 through the positioning plug 403, thereby realizing a torsional fatigue test operation on the test spring 6;

[0061] S4. If the fatigue test device is used to perform a bending fatigue test on the test spring 6, after completing the S1 operation, the hydraulic cylinder 502 is operated to push the tooth plate 504 to slide forward on the sliding protrusion 503, and the tooth plate 504 drives the gear 1 505 to rotate, further driving the movable plate 507 to slide in the arc groove 509 on the top surface of the arc plate 508, and the movable plate 507 drives the reciprocating drive assembly 3 to follow the movement, so that the U-shaped plug-in column 2 323 is aligned with the first positioning block 401, and then the U-shaped plug-in column 2 323 is pulled upward to make the T-shaped slot 1 318 inside the driving plate 317 unobstructed, and then the T-shaped protrusion 1 404 on the side wall of the second positioning block 402 is moved along the T-shaped slot 1 318. 18 slides into the driving plate 317, then loosens the U-shaped pin 2 323, and fine-tunes the second positioning block 402 so that the U-shaped pin 2 323 is inserted into the socket 405, completing the positioning and fixing operation of the second positioning block 402. At this time, by rotating the motor 2 305, the driving block 316 is driven to perform reciprocating rotational motion, and the driving block 316 drives the driving plate 317 to perform reciprocating swinging motion around the driving block 316. The driving plate 317 drives the second positioning block 402 to perform reciprocating swinging motion around the driving block 316. The second positioning block 402 generates a reciprocating bending force on the test spring 6 through the positioning plug 403, thereby realizing a bending force fatigue test operation on the test spring 6.

[0062] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A fatigue testing device for high temperature alloy sealing springs for aircraft engines, characterized in that: The workbench (1) comprises a push-pull assembly (2) and a reciprocating drive assembly (3) arranged on the top of the workbench (1), a positioning assembly (4) arranged between the push-pull assembly (2) and the reciprocating drive assembly (3), and an adjustment assembly (5) arranged on the bottom of the workbench (1); The adjustment component (5) is used to adjust the position of the reciprocating drive component (3); The positioning assembly (4) is used to position and fix the test spring (6); The push-pull assembly (2) is used to repeatedly stretch and compress the test spring (6) to perform an elastic fatigue test; The reciprocating drive assembly (3) is used to apply a reciprocating torsional force or a reciprocating bending force to the test spring (6); When the reciprocating drive assembly (3) applies a reciprocating torsional force to the test spring (6), it is used to perform a torsional force fatigue test on the test spring (6); when the reciprocating drive assembly (3) applies a reciprocating bending force to the test spring (6), it is used to perform a bending force fatigue test on the test spring (6); The adjustment assembly (5) comprises a support plate (501) arranged at the bottom of the workbench (1), the support plate (501) being connected to the inner side wall of the workbench (1), a hydraulic cylinder (502) and a sliding convex strip (503) being arranged on the top surface of the support plate (501), an output end of the hydraulic cylinder (502) being connected to a toothed plate (504), a sliding groove matching the sliding convex strip (503) being provided on the bottom surface of the toothed plate (504), the toothed plate (504) being slidingly matched with the sliding convex strip (503) through the sliding groove, a gear 1 (505) being rotatably connected to the top surface of the support plate (501), and a gear 1 (505) being rotatably connected to the side wall of the toothed plate (504) (505) meshingly connected to the tooth groove, the gear one (505) is coaxially connected to a rotating frame (506), the rotating frame (506) is arranged above the workbench (1), the side wall of the rotating frame (506) is connected to a moving plate (507), an arc plate (508) connected to the top surface of the workbench (1) is arranged below the moving plate (507), the top surface of the arc plate (508) is provided with an arc groove (509), the bottom surface of the moving plate (507) is provided with an arc slide (510) slidably matched with the arc groove (509), and the moving plate (507) is slidably matched with the arc plate (508) through the arc slide (510); The push-pull assembly (2) comprises a motor frame (201), a support frame 1 (202) and a plurality of support frames 2 (203) arranged on the top of the workbench (1); a rotating motor 1 (204) is arranged on the top of the motor frame (201); an output end of the rotating motor 1 (204) is connected to a rotating column 1 (205); the rotating column 1 (205) is rotatably connected to the upper side wall of the support frame 1 (202); two driving pulleys (206) are connected to the circumferential outer wall of the rotating column 1 (205); the driving pulley (206) is transmission-connected to a driven pulley (208) via a toothed belt (207); The driven pulley (208) is rotatably connected to the upper side wall of the second support frame (203); the driven pulley (208) is coaxially connected to a rotating plate (209); the side wall of the rotating plate (209) is connected to a fixed column (210); a connecting rod (211) is movably arranged on the circumferential side wall of the fixed column (210); the other end of the connecting rod (211) is rotatably connected to a push-pull rod (212); a fixed seat (213) passes through the rod body of the push-pull rod (212); the push-pull rod (212) and the fixed seat (213) are movably matched; and the fixed seat (213) is arranged on the top of the workbench (1); The reciprocating drive assembly (3) comprises a fixed frame (301) arranged on the top surface of the moving plate (507), the top surface of the fixed frame (301) being connected to a frame (302), a fixed plate 1 (303) and a fixed plate 2 (304), the top surface of the fixed frame (301) being further arranged with a rotating motor 2 (305), the output end of the rotating motor 2 (305) being connected with a rotating column 2 (306), the rotating column 2 (306) penetrating the side wall of the fixed plate 1 (303), the rotating column 2 (306) being rotatably matched with the side wall of the fixed plate 1 (303), the end of the rotating column 2 (306) being connected with an adjusting plate (307), the side wall of the adjusting plate (307) being provided with an adjusting slot (308), and an adjusting rod (309) being arranged in the adjusting slot (308); The upper side wall of the frame (302) is connected to a fixing rod (310), the circumferential outer wall of the fixing rod (310) is sleeved with a rotating cylinder (311), the rotating cylinder (311) is rotatably matched with the fixing rod (310), and the outer side wall of the rotating cylinder (311) is connected to a long strip (312) and a triangular plate (313); Wherein, a side wall of the long plate (312) is provided with a long groove (314), and the adjustment rod (309) is arranged in the long groove (314); The bottom surface of the triangular plate (313) is a circular arc curved surface structure, and the bottom surface of the triangular plate (313) is also provided with a plurality of tooth grooves; The upper side wall of the second fixing plate (304) is rotatably connected to a second gear (315), the second gear (315) is meshingly connected to a plurality of tooth grooves on the bottom surface of the triangular plate (313), the second gear (315) is coaxially connected to a driving block (316), and the side wall of the driving block (316) is integrally formed with a driving plate (317); The driving plate (317) is an arc-shaped plate-like structure, and a T-shaped groove (318) is provided on a side wall of the driving plate (317), and the T-shaped groove (318) extends to the side wall of the driving block (316); The top surface of the driving block (316) is connected to a frame plate (319), the top surface of the frame plate (319) is provided with a U-shaped plug post (320), the U-shaped plug post (320) passes through the interior of the driving block (316), the U-shaped plug post (320) is plugged into and matched with the frame plate (319) and the driving block (316), a limiting block (321) is arranged on the circumferential outer wall of the U-shaped plug post (320), the bottom surface of the limiting block (321) is arranged to be an arc surface structure that matches the shape of the top surface of the driving block (316), and the rod body of the U-shaped plug post (320) is provided with an elastic spring (322), and the elastic spring (322) is arranged between the frame plate (319) and the limiting block (321); A second U-shaped plug post (323) is arranged on the top surface of the driving plate (317), and the second U-shaped plug post (323) has the same structural components as the first U-shaped plug post (320), wherein a second limiting block (324) is arranged on the circumferential outer wall of the second U-shaped plug post (323), and the second limiting block (324) is a circular plate-shaped structure; The positioning assembly (4) comprises a first positioning block (401), a second positioning block (402) and a plurality of positioning plug blocks (403); the side wall of the first positioning block (401) is connected to the end of the push-pull rod (212); the side wall of the second positioning block (402) is provided with a T-shaped protrusion (404) that matches the T-shaped slot (318); the second positioning block (402) is slidably matched with the T-shaped slot (318) through the T-shaped protrusion (404); the T-shaped protrusion (404) is provided with a plurality of sockets (405) from top to bottom that match the column of the U-shaped plug column (320); The side wall of the first positioning block (401) is provided with a second T-shaped slot (406), the side wall of the first positioning block (401) is connected to a slot sealing plate (407) via screws and nuts, and the side wall of the second positioning block (402) is provided with the same structural components as the side wall of the first positioning block (401); The side wall of the positioning plug (403) is connected to a second T-shaped protrusion (408) that fits with the second T-shaped slot (406); the positioning plug (403) is plugged into and matched with the second T-shaped slot (406) via the second T-shaped protrusion (408); the positioning plug (403) is used to be welded to the end of the test spring (6) to fix the test spring (6).

2. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 1, characterized in that: The adjustment plate (307) is a long strip-shaped plate-like structure. The inner side wall of the adjustment groove (308) is provided with a plurality of grooves (325). The side wall of the adjustment rod (309) is provided with a circular groove (326). A threaded hole is provided in the circular groove (326). The adjustment rod (309) is threadedly connected to a threaded column (327) through the threaded hole. The outer circumferential wall of the threaded column (327) is connected to a push plate (328) that fits with the circular groove (326). The other end of the threaded column (327) is connected to a rotating handle (329). The threaded column (327) is a smooth column located between the push plate (328) and the rotating handle (329). An adjustment block (330) is movably sleeved on the circumferential outer wall of the threaded column (327). The adjustment block (330) is arranged between the push plate (328) and the rotating handle (329). The side wall of the adjustment block (330) is connected with a plurality of convex plates (331) that fit with the groove (325). The adjustment block (330) is plugged into and matched with the adjustment groove (308) via the convex plates (331).

3. The method for using the fatigue testing device for high temperature alloy sealing spring for aircraft engines according to claim 2, characterized in that: The following steps are involved: S1. Fixing the test spring (6) by respectively welding the two ends of the test spring (6) to the side walls of the positioning plug (403), then inserting the T-shaped protrusions (408) on the side walls of the two positioning plugs (403) into the T-shaped slots (406) of the first positioning block (401) and the second positioning block (402), respectively, and then fixing the two sealing plates (407) to the side walls of the first positioning block (401) and the second positioning block (402) by screws and nuts, respectively, to form a surrounding effect on the T-shaped slots (406), so that the two positioning plugs (403) and the test spring (6) are fixed; S2. If the fatigue testing device is used to perform an elastic fatigue test on the test spring (6), the U-shaped plug post (320) is pulled upward to make the T-shaped slot (318) inside the driving block (316) unobstructed, and then the T-shaped protrusion (404) on the side wall of the second positioning block (402) is slid into the driving block (316) along the T-shaped slot (318), and then the U-shaped plug post (320) is loosened, and the second positioning block (402) is finely adjusted to make the U-shaped plug post (320) inserted into the socket (405). The U-shaped plug post (320) is subjected to the elastic force of the elastic spring (322) and always remains inserted into the socket (405). The second positioning block (402) is adjusted. 2) forming a positioning and fixing effect, and then by rotating the motor 1 (204), driving the two driving pulleys (206) to rotate, the driving pulley (206) drives the driven pulley (208) to rotate through the toothed belt (207), so that the rotating plate (209) follows the axis of the driven pulley (208) to rotate, and further drives the fixed column (210) to perform a circular motion, so that the connecting rod (211) pushes and pulls the push-pull rod (212), and the push-pull rod (212) pushes and pulls the first positioning block (401), and the first positioning block (401) cooperates with the second positioning block (402) to repeatedly stretch and compress the test spring (6), and perform an elastic fatigue test on the test spring (6); S3. If the fatigue test device is used to perform a torsional fatigue test on the test spring (6), after the positioning and fixing operation of the second positioning block (402) is completed through the operation of S2, the second rotating motor (305) drives the second rotating column (306) to rotate, and the second rotating column (306) drives the adjustment plate (307) to rotate. The adjustment rod (309) on the adjustment plate (307) follows the adjustment plate (307) to make a circular motion, and the adjustment rod (309) drives the long strip plate (312) to make a reciprocating swing motion, and the triangle The plate (313) follows the long strip plate (312) to perform reciprocating swinging motion, the plurality of tooth grooves on the bottom surface of the triangular plate (313) drive the second gear (315) to perform reciprocating rotational motion, the second gear (315) drives the coaxially connected driving block (316) to perform reciprocating rotational motion, the driving block (316) drives the second positioning block (402) to perform reciprocating rotational motion, the second positioning block (402) generates a reciprocating torsional force on the test spring (6) through the positioning plug block (403), thereby performing a torsional fatigue test operation on the test spring (6); S4. If the fatigue test device is used to perform a bending force fatigue test on the test spring (6), after completing the S1 operation, the hydraulic cylinder (502) is operated to push the tooth plate (504) to slide forward on the sliding convex strip (503), and the tooth plate (504) drives the gear 1 (505) to rotate, further driving the movable plate (507) to slide in the arc groove (509) on the top surface of the arc plate (508), and the movable plate (507) drives the reciprocating drive assembly (3) to follow the movement, so that the U-shaped plug column 2 (323) is aligned with the first positioning block (401), and then the U-shaped plug column 2 (323) is pulled upward to make the T-shaped groove 1 (318) inside the drive plate (317) unobstructed, and then the T-shaped protrusion 1 (404) on the side wall of the second positioning block (402) is moved along the T-shaped groove 1 ( The second positioning block (402) is slightly adjusted so that the second U-shaped plug post (323) is inserted into the plug hole (405), thereby completing the positioning and fixing operation of the second positioning block (402). At this time, the second motor (305) is driven to drive the driving block (316) to perform reciprocating rotational motion, and the driving block (316) drives the driving plate (317) to perform reciprocating swinging motion around the driving block (316). The driving plate (317) drives the second positioning block (402) to perform reciprocating swinging motion around the driving block (316). The second positioning block (402) generates a reciprocating bending force on the test spring (6) through the positioning plug post (403), thereby realizing a bending force fatigue test operation on the test spring (6).

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