Fatigue testing device for high-temperature alloy sealing spring for aero-engine

Abstract

The invention discloses a fatigue testing device for a high-temperature alloy sealing spring for an aero-engine, relates to the technical field of spring fatigue testing, and aims to solve the technical problems that an existing fatigue testing machine is relatively single in testing content and is difficult to carry out fatigue testing on torsional force and bending force borne by the spring. A push-pull assembly and a reciprocating driving assembly are arranged at the top of the workbench, a positioning assembly is arranged between the push-pull assembly and the reciprocating driving assembly, an adjusting assembly is arranged at the bottom of the workbench, and the reciprocating driving assembly is used for applying reciprocating torsional force or reciprocating bending force to a test spring and carrying out torsional force fatigue test or bending force fatigue test on the test spring. The device has the advantages that an elastic force fatigue test, a torsional force fatigue test and a bending force fatigue test can be respectively performed on the test spring, and possible stretching, compression, torsion and bending forces of the test spring in practical application can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of spring fatigue testing, and more specifically to a fatigue testing device for a high-temperature alloy sealing spring used in an aero-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 the operation of the engine, 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 usually used to repeatedly stretch and compress the spring to simulate the actual working state of the spring and achieve the purpose of fatigue testing the spring. Although stretching and compression are the main force modes of the spring, in some special cases, the spring may also be subjected to some secondary forces, such as torsion or bending. These situations may be caused by abnormal vibration inside the engine, component installation errors or unexpected mechanical interference. The test content of the existing fatigue testing machine is relatively single, and it is difficult to perform fatigue testing on the torsion and bending forces to which the spring is subjected. In view of this, we propose a fatigue testing device for high-temperature alloy sealing springs for aircraft engines. Summary of the invention

[0004] The purpose of the present invention is to provide a fatigue testing device for a high-temperature alloy sealing spring for an aero-engine, so as 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 exerted on the spring.

[0005] 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 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 adjustment assembly is used to adjust the position of the reciprocating drive assembly; the positioning assembly is used to position and fix the test spring; the push-pull assembly is used to repeatedly stretch and compress the test spring to perform an elastic fatigue test; the reciprocating drive assembly is 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 comprises a motor frame, a support frame 1 and a plurality of support frames 2 arranged on the top of the workbench, a rotating motor 1 is arranged on the top of the motor frame, an 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 a rotating plate, the side wall of the rotating plate is connected to a fixed column, a connecting rod is movably arranged on the circumferential side wall of the fixed column, 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 surface of the gear train is provided with a toothed plate, and the bottom surface of the toothed plate is provided with a toothed groove which fits the sliding strip, and the toothed plate is slidably matched with the sliding strip through the sliding groove. The top surface of the gear train is slidably matched with the sliding strip, and the toothed plate is slidably matched with the sliding strip through the sliding groove.

[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 with 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 is rotatably matched with a side wall of the fixed plate, the second end of the rotating column is connected with an adjustment plate, the side wall of the adjustment plate is provided with an adjustment groove, and an adjustment rod is arranged in the adjustment groove.

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

[0010] Preferably, it is characterized in that the upper side wall of the second fixing plate is rotatably connected with a second gear, the second gear is meshingly connected with a plurality of tooth grooves on the bottom surface of the triangular plate, the second gear is coaxially connected with a driving block, and the side wall of the driving block is integrally formed with a driving plate.

[0011] The U-shaped plug-in block is connected to the top surface of the driving plate, and the U-shaped plug-in block is inserted into the top surface of the frame plate, and the U-shaped plug-in block passes through the interior of the driving block, and the U-shaped plug-in block is plugged and matched with the frame plate and the driving block, and a limiting block is arranged on the circumferential outer wall of the U-shaped plug-in block, 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, and the rod body of the U-shaped plug-in block is sleeved with an elastic spring, and the elastic spring is arranged between the frame plate and the limiting block one; a U-shaped plug-in block two is arranged on the top surface of the driving plate, and the U-shaped plug-in block two has the same structural components as the U-shaped plug-in block one, wherein a limiting block two is arranged on the circumferential outer wall of the U-shaped plug-in block two, and the limiting block two is a circular plate structure.

[0012] Preferably, it is characterized in that the adjusting plate is an elongated 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, the circular groove is provided with a threaded hole, the adjusting rod is threadedly connected with a threaded column through the threaded hole, the circumferential outer wall of the threaded column is connected with a push plate that fits with the circular groove, the other end of the threaded column is connected with a rotating handle, the column body of the threaded column located between the push plate and the rotating handle is a smooth column, the circumferential outer 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 with the grooves, and the adjusting block is plug-fitted with 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-in blocks, 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 matches 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 match 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 with a sealing slot 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 block is connected with a T-shaped protrusion 2 that matches 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: 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, and then fixing the two sealing plates to the side walls of the first positioning block and the second positioning block by screws and nuts, thereby enclosing the T-shaped slots 2, and fixing the two positioning blocks and the test spring; S2. If the fatigue testing device is used to perform an elastic fatigue test on the test spring, 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 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 inserted in 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 with 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, so as to perform an elastic fatigue test on the test spring; S3, if the fatigue testing device is used to perform a torsional fatigue test on the 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 make a circular motion, the adjustment rod drives the long plate to make a reciprocating swing motion, the triangular plate follows the long plate to make a reciprocating swing motion, the multiple tooth grooves on the bottom surface of the triangular plate drive the second gear to make a reciprocating rotation motion, the second gear drives the coaxially connected driving block to make a reciprocating rotation motion, the driving block drives the second positioning block to make a reciprocating rotation motion, the second positioning block generates a reciprocating torsional force on the test spring through the positioning plug, and the torsional fatigue test operation of the test spring is realized; S4. If the fatigue test device is used to perform a bending force fatigue test on the test spring, after completing the S1 operation, the hydraulic cylinder is used to push the toothed plate to slide forward on the sliding convex strip, and the toothed plate drives the gear 1 to rotate, and further drives the moving plate to slide in the arc groove on the top surface of the arc plate, and the moving plate drives the reciprocating drive assembly to follow the movement, so that the U-shaped plug column 2 is aligned with the first positioning block, and then the U-shaped plug 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 one slides into the driving plate, then loosen U-shaped pin two, and fine-tune the second positioning block so that U-shaped pin two is inserted into the socket, completing the positioning and fixing operation of the second positioning block. At this time, by rotating motor two, the driving block is driven to perform reciprocating rotational motion, 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, and the second positioning block generates a reciprocating bending force on the test spring through the positioning plug, thereby realizing the bending force fatigue test operation on the test spring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can repeatedly stretch and compress the test spring by designing a push-pull component, and the reciprocating drive component can apply reciprocating torsion force or reciprocating bending force to the test spring, thereby realizing elastic fatigue test, torsion fatigue test and bending fatigue test on the test spring respectively, simulating the stretching, compression, torsion 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.

[0016] 2. The present invention also rotates the rotating handle to make the threaded column move outward in the threaded hole of the adjusting rod, so that the push plate drives the adjusting block to move out of the adjusting groove, and then adjusts the position of the adjusting rod on the side of the adjusting plate, and then rotates the rotating handle to make the threaded column move inward in the threaded hole of the adjusting rod, so that the rotating handle drives the adjusting block to move into the adjusting groove, and the convex plate of the adjusting block is inserted into the groove of the inner side wall of the adjusting groove 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 adjust the amplitude of the reciprocating rotation motion of the driving block and the amplitude of the reciprocating swing motion of the driving plate, further adjust the strength of the torsional force or bending force applied to the test spring, and can adjust the intensity of the torsional fatigue test and the bending fatigue test of the test spring according to actual conditions.

[0017] 3. The present invention also arranges a U-shaped plug post 1 above the driving block and a U-shaped plug post 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 post 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 post 1 is loosened, and the second positioning block is fine-tuned to make the U-shaped plug post 1 inserted into the insertion hole. The U-shaped plug post 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 by adjusting the assembly to align the U-shaped pin 2 with the first positioning block, and then the U-shaped pin 2 is pulled upward to make the T-slot 1 inside the drive plate unobstructed, and then the T-shaped protrusion 1 on the side wall of the second positioning block is slid into the drive plate along the T-slot 1, and then the U-shaped pin 2 is released, and the second positioning block is fine-tuned to insert the U-shaped pin 2 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 when the fatigue test of the test spring is carried out, avoiding shaking or falling off, and improving the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the present invention from a viewing angle; Figure 2 It is a schematic diagram of the overall structure of the present invention from a second perspective; Figure 3 It is a schematic diagram of the push-pull assembly structure of the present invention; Figure 4 It is a schematic diagram of the structure of the regulating component of the present invention; Figure 5 It is a schematic diagram of the bottom structure of the movable plate of the present invention; Figure 6 It is a schematic diagram of the reciprocating drive assembly structure from a first perspective of the present invention; Figure 7 It is a schematic diagram of the reciprocating drive assembly structure from a second perspective of the present invention; Figure 8 It is a schematic diagram of the split structure of the frame and the drum of the present invention; Fig. 9 It is a schematic diagram of the structure of the driving block and the driving plate of the present invention; Fig.10 It is a schematic diagram of the structure of the U-shaped plug post 1 and the U-shaped plug post 2 of the present invention; Fig.11 It is a schematic diagram of the structure of the adjustment plate of the present invention; Fig.12 It is a schematic diagram of the split structure of the threaded column and the adjusting rod of the present invention; Fig.13 It is a schematic diagram of the structure of the adjusting rod of the present invention; Fig.14 It is a schematic diagram of the separation structure of the adjustment block and the threaded column of the present invention; Fig.15 It is a schematic diagram of the structure of the positioning component of the present invention; Fig.16 This is a schematic diagram of the split structure of the positioning component of the present invention; Fig.17 The figure is a schematic diagram of a usage state of the present invention.

[0019] Description of the numbers in the figure: 1. Workbench; 2. Push-pull assembly; 3. Reciprocating drive assembly; 4. Positioning assembly; 5. Adjustment assembly; 6. Test spring; 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; 301, fixed frame; 302, frame; 303, fixed plate 1; 304, fixed plate 2; 305, rotating motor 2; 306, rotating column 2; 307, adjusting plate; 308, adjusting slot; 309, adjusting rod; 310, fixed rod; 311, rotating drum; 312, long strip plate; 313, triangular plate; 314, long strip slot; 315, gear 2; 316, driving block; 317, driving plate; 318, T-slot 1; 319, frame plate; 320, U-shaped plug column 1; 321, limit block 1; 322, elastic spring; 323, U-shaped plug column 2; 324, limit block 2; 325, groove; 326, round groove; 327, threaded column; 328, push plate; 329, rotating handle; 330, adjusting block; 331, convex plate; 401, first positioning block; 402, second positioning block; 403, positioning plug; 404, T-shaped protrusion 1; 405, plug hole; 406, T-shaped slot 2; 407, slot sealing plate; 408, T-shaped protrusion 2; 501, support plate; 502, hydraulic cylinder; 503, sliding convex strip; 504, tooth plate; 505, gear 1; 506, rotating frame; 507, moving plate; 508, arc plate; 509, arc groove; 510, arc slide bar. DETAILED DESCRIPTION

[0020] 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 are arranged on the top of the workbench 1, a positioning assembly 4 is arranged between the push-pull assembly 2 and the reciprocating drive assembly 3, and an adjustment assembly 5 is arranged at the bottom of the workbench 1.

[0021] In the 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 The invention designs a push-pull component 2 that can repeatedly stretch and compress the test spring 6, and a reciprocating drive component 3 that can apply a reciprocating torsional force or a reciprocating bending force to the test spring 6, and can respectively perform elastic fatigue tests, torsional fatigue tests, and bending fatigue tests on the test spring 6, thereby simulating the stretching, compression, torsional, and bending forces that the test spring 6 may be subjected to in actual applications, and performing fatigue tests on different types of forces to which the test spring 6 is subjected, thereby reflecting the true performance of the test spring 6 and ensuring its safety and reliability in such high-demand application scenarios as aircraft engines.

[0022] In the embodiment of the present invention, the push-pull assembly 2 includes a motor frame 201, a support frame 202 and two support frames 203 arranged on the top of the workbench 1, a rotating motor 204 is arranged on the top of the motor frame 201, and a rotating column 205 is connected to the output end of the rotating motor 204. The rotating column 205 is rotatably connected to the upper side wall of the support frame 202, and the outer wall of the rotating column 205 is connected to two active pulleys 206. 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. A fixed seat 213 passes through the push-pull rod 212. 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 the two active pulleys 206 are driven to rotate by the rotating motor 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 make a circular motion, so that the connecting rod 211 pushes and pulls the push-pull rod 212.

[0023] 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 matches 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 moving plate 507, and a gear 506 that meshes with the moving plate 507 is arranged below the moving plate 507. An arc 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 arc plate 508. An arc slide bar 510 that slides with the arc groove 509 is arranged on the bottom surface of the movable plate 507. The movable plate 507 slides with the arc plate 508 through the arc slide bar 510. The movable plate 507 is used to drive the reciprocating drive component 3 to move synchronously, so as to adjust the position of the reciprocating drive component 3; through the operation of the hydraulic cylinder 502, the tooth plate 504 is pushed 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 component 3 to follow the movement, so as to achieve the effect of adjusting the position of the reciprocating drive component 3.

[0024] In the embodiment of the present invention, the reciprocating drive assembly 3 includes a fixed frame 301 arranged on the top surface of the moving plate 507, the top surface of the fixed frame 301 is connected with a frame 302, a fixed plate 1 303 and a 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 with a rotating column 2 306, the rotating column 2 306 penetrates 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 with 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; Furthermore, the adjustment plate 307 is a long strip 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 with a threaded column 327 through the threaded hole, the outer circumferential wall of the threaded column 327 is connected with a push plate 328 that matches the circular groove 326, the other end of the threaded column 327 is connected with 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 circumferential wall of the threaded column 327 is movably sleeved with an adjustment block 330, 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 match the grooves 325, the adjustment block 330 is plugged and matched with the adjustment groove 308 through the convex plates 331; Furthermore, the upper side wall of the frame 302 is connected to a fixing rod 310, and a rotating drum 311 is sleeved on the outer circumferential wall of the fixing rod 310, and the rotating drum 311 is rotatably matched with the fixing rod 310, and the outer side wall of the rotating drum 311 is connected to a long plate 312 and a triangular plate 313; wherein, a long groove 314 is provided on the side wall of the long plate 312, and the adjusting 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 a plurality of tooth grooves are also provided on the bottom surface of the triangular plate 313; The present invention rotates the rotary handle 329 to move the threaded column 327 outward in the threaded hole of the adjusting rod 309, so that the push plate 328 drives the adjusting block 330 to move out of the adjusting groove 308, and then adjusts the position of the adjusting rod 309 on the side of the adjusting plate 307, and then rotates the rotary handle 329 to move the threaded column 327 inward in the threaded hole of the adjusting rod 309, so that the rotary handle 329 drives the adjusting block 330 to move into the adjusting groove 308, and the convex plate 331 of the adjusting block 330 is inserted into the groove 331 of the inner wall of the adjusting 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, and then the swing amplitude of the long strip plate 312 and the triangular plate 313 can be changed, 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, and further adjust the strength of the torsional force or bending force applied to the test spring 6. According to actual conditions, the strength of the torsional fatigue test and the bending fatigue test on the test spring 6 can be adjusted.

[0025] In the embodiment of the present invention, the upper side wall of the fixing plate 304 is rotatably connected with a gear 315, the gear 315 is meshed with a plurality of tooth grooves on the bottom surface of the triangular plate 313, the gear 315 is coaxially connected with a driving block 316, 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, the side wall of the driving plate 317 is provided with a T-shaped slot 318, and the T-shaped slot 318 extends to the side wall of the driving block 316; the top surface of the driving block 316 is connected with a frame plate 319, the top surface of the frame plate 319 is inserted with a U-shaped plug post 320, the U-shaped plug post 320 runs through the inside of the driving block 316, and the U-shaped plug post 320 passes through the inside of the driving block 316. 20 is plugged and matched with the frame plate 319 and the driving block 316, a limiting block 321 is arranged on the outer circumference wall of the U-shaped plug column 320, and the bottom surface of the limiting block 321 is set to 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 column 320 is sleeved with an elastic spring 322, and the elastic spring 322 is arranged between the frame plate 319 and the limiting block 321; a U-shaped plug column 2 323 is arranged on the top surface of the driving plate 317, and the U-shaped plug column 2 323 has the same structural components as the U-shaped plug column 1 320, wherein a limiting block 2 324 is arranged on the outer circumference wall of the U-shaped plug column 2 323, and the limiting block 2 324 is a circular plate-shaped structure; Furthermore, the positioning assembly 4 includes 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-slot 318. The second positioning block 402 slides with the T-slot 318 through the T-shaped protrusion 404. The T-shaped protrusion 404 is provided with a plurality of sockets 405 that match the U-shaped plug column 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 matches the T-slot 2 406. The positioning block 403 is plugged into and matched with the T-slot 406 through the T-shaped protrusion 408. The positioning block 403 is used to be welded at the end of the test spring 6 to fix the test spring 6; by respectively welding the two ends of the test spring 6 to the side walls of the positioning block 403, and then inserting the T-shaped protrusions 408 on the side walls of the two positioning blocks 403 into the T-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 respectively through screws and nuts, forming a confining effect on the T-slots 406, so that the two positioning blocks 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.

[0026] The present invention arranges a U-shaped plug post 320 above the driving block 316 and arranges a U-shaped plug post 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 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, 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 component 3 is adjusted by adjusting the component 5 so that the U-shaped pin 323 is aligned with the first positioning block 401, and then the U-shaped pin 323 is pulled upward to make the T-slot 318 inside the drive plate 317 unobstructed, and then the T-shaped protrusion 404 on the side wall of the second positioning block 402 is slid into the drive plate 317 along the T-slot 318, and then the U-shaped pin 323 is released, and the second positioning block 402 is fine-tuned so that the U-shaped pin 323 is inserted into the socket 405, so that the second positioning block 402 is positioned and fixed, ensuring that when the test spring 6 is subjected to a fatigue test, the test spring 6 can remain stable and firm on the positioning component 4 to avoid shaking or falling off, thereby improving the stability of the test.

[0027] 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 comprises the following steps: 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 T-shaped protrusions 408 on the side walls of the two positioning blocks 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, so as to enclose the T-shaped slots 406, and fix the two positioning blocks 403 and the test spring 6; S2. If the fatigue test device is used to perform 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, and then the U-shaped plug-in column 320 is loosened, and the second positioning block 402 is finely adjusted to make the U-shaped plug-in column 320 inserted into the insertion hole 405. The U-shaped plug-in column 320 is subjected to the elastic force of the elastic spring 322 and always keeps the state of being inserted into the insertion hole 405, and the second positioning block 40 2 forms a positioning and fixing effect, and then the two active pulleys 206 are driven to rotate by rotating the motor 1 204, and the active pulley 206 drives the driven pulley 208 to rotate through the toothed belt 207, so that the rotating plate 209 follows the axis rotation of the driven pulley 208, and further drives the fixed column 210 to make 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, and 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 plate 312 to make a reciprocating swing motion, and the triangular plate 313 follows the long plate 312 to make a reciprocating swing motion, and the multiple tooth grooves on the bottom surface of the triangular plate 313 drive the second gear 315 to make a reciprocating rotation motion, and the second gear 315 drives the coaxially connected driving block 316 to make a reciprocating rotation motion, and the driving block 316 drives the second positioning block 402 to make 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, so as to realize the 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 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, and further drives the moving plate 507 to slide in the arc groove 509 on the top surface of the arc plate 508. The moving 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 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 323, and fine-tunes the second positioning block 402 to insert the U-shaped pin 323 into the socket 405, completing the positioning and fixing operation of the second positioning block 402. At this time, the driving block 316 is driven to perform reciprocating rotational motion by rotating the motor 305, 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.

[0028] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope 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).

2. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 1, characterized in that: 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).

3. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 2, characterized in that: 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 movable plate (507), an arc plate (508) connected to the top surface of the workbench (1) is arranged below the movable plate (507), the top surface of the arc plate (508) is provided with an arc groove (509), the bottom surface of the movable plate (507) is provided with an arc slide (510) slidably matched with the arc groove (509), and the movable plate (507) is slidably matched with the arc plate (508) through the arc slide (510).

4. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 3, characterized in that: 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) is connected to a frame (302), a fixed plate 1 (303) and a 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 with a rotating column 2 (306); the rotating column 2 (306) passes through a side wall of the fixed plate 1 (303); the rotating column 2 (306) is rotatably matched 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); an adjusting rod (309) is arranged in the adjusting slot (308).

5. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 4, characterized in that: 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.

6. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 5, characterized in that: 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).

7. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 6, characterized in that: 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 limit block (324) is arranged on the circumferential outer wall of the second U-shaped plug post (323), and the second limit block (324) is a circular plate-shaped structure.

8. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 7, 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).

9. The fatigue testing device for high temperature alloy sealing spring for aircraft engine according to claim 8, characterized in that: 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).

10. The method for using the fatigue testing device for high temperature alloy sealing springs for aircraft engines according to claim 9, 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).

Images