Piston rod surface and support ring fit test apparatus

Abstract

This invention discloses a piston rod surface and support ring compatibility testing device, relating to the field of compatibility testing technology. It includes a frame, a fixed frame mounted on the frame, and a first servo cylinder; a fixed rod disposed inside the fixed frame and a lifting frame slidably connected to the outside of the fixed rod; a slide rail disposed inside the fixed frame, a piston rod prosthesis fixing seat slidably connected to the outside of the slide rail, and a piston rod prosthesis mounted on the piston rod prosthesis fixing seat; a testing mechanism disposed on the lifting frame, the testing mechanism including a support ring mounting seat disposed on the lifting frame and a support ring mounted on the support ring mounting seat, wherein the first servo cylinder is used to drive the support ring to contact the piston rod prosthesis. It also includes a sliding box slidably connected inside the fixed frame and a processing mechanism connected to the sliding box; this piston rod surface and support ring compatibility testing device achieves the purpose of improving the efficiency of equipment use.

Description

Technical Field

[0001] This invention relates to the field of compatibility testing technology, specifically to a device for testing the compatibility between the piston rod surface and the support ring. Background Technology

[0002] The piston rod surface and support ring compatibility test is an experiment designed to verify the matching performance of this critical friction pair in a hydraulic or pneumatic system. By simulating reciprocating motion, lateral loads, and lubrication conditions under actual working conditions, the test systematically evaluates the synergistic effect between the surface roughness, hardness, and coating quality of the piston rod and the material and self-lubricating properties of the support ring. The core purpose is to avoid failure modes such as abnormal wear, excessive friction coefficient, scratches, material transfer, and even jamming caused by mismatch between the two, thereby ensuring low friction, long service life, and reliability of the equipment during operation, and preventing premature scrapping of the entire hydraulic system due to wear debris contamination or seal failure.

[0003] Traditional equipment involves using numerous testing devices to separately test the piston rod and support ring, resulting in a cumbersome testing process. Some equipment manufacturers directly use actual machines to test the compatibility between the support ring and piston rod, which is time-consuming and costly. Summary of the Invention

[0004] To overcome the problem of cumbersome testing procedures caused by using numerous testing devices to test the piston rod and support ring separately, this invention provides a simpler and lower-cost method for testing the compatibility between the support ring and the piston rod. The invention provides a piston rod surface and support ring compatibility testing device, including a frame, and further comprising: The mounting bracket on the frame and the first servo electric cylinder; The fixed rod is installed inside the fixed frame and the lifting frame is slidably connected to the outside of the fixed rod; The slide rail is located inside the fixation frame, the piston rod prosthesis fixation seat is slidably connected to the outside of the slide rail, and the piston rod prosthesis is installed on the piston rod prosthesis fixation seat; The testing mechanism is set on the lifting frame, and the testing mechanism includes a support ring mounting seat set on the lifting frame and a support ring mounted on the support ring mounting seat. The first servo electric cylinder is used to drive the support ring to contact the piston rod prosthesis.

[0005] Preferably, it further includes: A sliding box slidably connected inside the fixed frame and a processing mechanism connected to the sliding box; A test force sensor is installed on the telescopic end of the first servo electric cylinder, and the test force sensor is connected to the lifting frame. The second servo electric cylinder, installed inside the mounting bracket, is used to drive the piston rod prosthesis mounting seat to move the piston rod prosthesis outside the slide rail.

[0006] Preferably, the testing mechanism further includes: A bidirectional force sensor and a noise sensor are installed on the lifting frame; The oil storage grid is installed on the lifting frame.

[0007] Preferably, the processing mechanism includes: The first push rod is installed inside the fixed frame, and the telescopic end of the first push rod is connected to the sliding box; A fixed pipe located above the sliding box and a connecting box connected to the fixed pipe; The first telescopic pipe and the second push rod are installed below the sliding box; The first connecting box is located on the telescopic end of the second push rod, and the first telescopic pipe is connected to the first connecting box.

[0008] Preferably, the processing mechanism further includes: An outer ring is installed on the outside of the first connecting box, and the outer ring is slidably connected to the outside of the fixed rod; The third push rod and the second telescopic pipe are located outside the first connecting box; The first connecting plate is disposed on the telescopic end of the third push rod and is installed on the outside of the second telescopic pipe; The connecting pipe installed outside the second expansion joint and the contact box connected to the connecting pipe.

[0009] Preferably, the processing mechanism further includes: An inclined plate installed inside the connecting box is used to intercept impurities. External pipes installed above the connection box.

[0010] Preferably, the processing mechanism further includes: A limiting bracket installed inside a fixed pipe and a spring installed inside the limiting bracket; The second connecting plate and the extension plate connected to the spring are installed at the end of the spring away from the limit bracket. The spring is used to drive the second connecting plate and the extension plate to move.

[0011] Preferably, the processing mechanism further includes: The first channel, the second channel, and the groove are formed inside the contact box; A first arc-shaped plate installed inside the groove and a third channel opened inside the first arc-shaped plate are used to suck up impurities.

[0012] The second arc-shaped plate is installed inside the groove.

[0013] Preferably, the processing mechanism further includes: A second connecting box is located outside the contact box, and a fourth channel is located below the second connecting box; The fourth push rod and the scraper connected to the telescopic end of the fourth push rod are installed inside the contact box. The scraper is used to scrape the inside of the contact box.

[0014] This invention provides a device for testing the compatibility between the piston rod surface and the support ring. It has the following advantages: 1. This piston rod surface and support ring compatibility testing equipment uses a vertically moving support ring and a horizontally moving piston rod dummy. The positions of the two are controlled by a first and a second servo electric cylinder, causing them to contact and rub against each other. Based on the display signals from a bidirectional force sensor, a noise sensor, and a test force sensor installed in the frame, and subsequent calculations, the service life of the support ring under a certain load is estimated based on the wear amount of the support ring wall thickness. This solves the problem of the cumbersome testing process caused by traditional equipment that uses numerous testing devices to test the piston rod and support ring separately.

[0015] 2. The piston rod surface and support ring compatibility testing equipment is equipped with a processing mechanism. In the gas suction state, the extension plate separates from the limiting frame, providing space for gas and impurities to move from bottom to top. When the suction work ends, the extension plate enters the limiting frame, blocking the path of impurities moving from top to bottom, thereby intercepting a large amount of dust and debris in the detachable connecting box.

[0016] 3. The piston rod surface and support ring compatibility testing equipment, through the setting of a processing mechanism, adjusts the distance between the contact box and the piston rod prosthesis by the second push rod, and drives the piston rod prosthesis to move in the horizontal direction by the second servo electric cylinder. The protruding impurities at the bottom of the piston rod prosthesis rub against the contact box. During the friction process, the contact box can promote the detachment of impurities on the outer surface of the piston rod prosthesis from the piston rod prosthesis.

[0017] 4. The piston rod surface and support ring compatibility testing equipment, through a processing mechanism, uses a contact box with first, second, and third channels to suction the piston rod prosthesis. The contact box is brought close to the piston rod prosthesis surface to contact any protruding impurities, promoting their detachment and preventing impurity particles from abrading the support ring. A groove is formed in the contact box, and a first and second arc-shaped plate are placed within the groove for the downward collection and suction of impurities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3This is a schematic diagram of the testing mechanism of the present invention; Figure 4 This is a schematic diagram of the processing mechanism of the present invention; Figure 5 This is a cross-sectional view of the connecting box of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A; Figure 7 This is a schematic diagram of the contact box structure of the present invention; Figure 8 This is a cross-sectional view of the contact box of the present invention.

[0019] In the diagram: 1. Frame; 2. Fixed frame; 3. Sliding box; 4. Processing mechanism; 401. Fixed pipe; 402. Connecting box; 403. First push rod; 404. First telescopic pipe; 405. Second push rod; 406. First connecting box; 407. Outer ring; 408. Third push rod; 409. First connecting plate; 410. Second telescopic pipe; 411. Second arc plate; 412. Connecting pipe; 413. Contact box; 414. External pipe; 415. Inclined plate; 416. Limiting frame; 417. Spring; 418. Second connecting plate; 419. Extension plate ; 420, First channel; 421, Second channel; 422, Groove; 423, First arc plate; 424, Second connecting box; 425, Fourth channel; 426, Fourth push rod; 427, Scraper; 5, Fixed rod; 6, Lifting frame; 7, Testing mechanism; 701, Bidirectional force sensor; 702, Noise sensor; 703, Support ring mounting seat; 704, Support ring; 705, Oil reservoir; 8, First servo electric cylinder; 9, Test force sensor; 10, Second servo electric cylinder; 11, Slide rail; 12, Piston rod prosthesis fixing seat; 13, Piston rod prosthesis. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0021] like Figures 1-8 As shown, the present invention provides a technical solution: the piston rod surface and support ring compatibility testing equipment is described below.

[0022] Including rack 1, it also includes: The mounting bracket 2 and the first servo electric cylinder 8 are mounted on the frame 1; The fixed rod 5 is installed inside the fixed frame 2 and the lifting frame 6 is slidably connected to the outside of the fixed rod 5; The slide rail 11 is located inside the frame 2, the piston rod prosthesis fixation seat 12 is slidably connected to the outside of the slide rail 11, and the piston rod prosthesis 13 is installed on the piston rod prosthesis fixation seat 12. The test mechanism 7 is set on the lifting frame 6. The test mechanism 7 includes a support ring mounting seat 703 set on the lifting frame 6, a support ring 704 set on the support ring mounting seat 703, a bidirectional force sensor 701 and a noise sensor 702 set on the lifting frame 6, and an oil storage grid 705 set on the lifting frame 6. The first servo electric cylinder 8 is used to drive the support ring 704 to contact the piston rod spur 13. A sliding box 3 and a processing mechanism 4 connected to the sliding box 3 are slidably connected inside the fixed frame 2. The test force sensor 9 is installed on the telescopic end of the first servo cylinder 8 and is connected to the lifting frame 6. The second servo electric cylinder 10 is installed inside the fixing frame 2. The second servo electric cylinder 10 is connected to the piston rod prosthesis fixing seat 12. The second servo electric cylinder 10 is used to drive the piston rod prosthesis fixing seat 12 to drive the piston rod prosthesis 13 to slide outside the slide rail 11.

[0023] When using the equipment, first manually install the piston rod dummy 13 onto the piston rod dummy mounting base 12. Then adjust the processing mechanism 4 and the second servo cylinder 10 to vacuum the lower surface of the piston rod dummy 13. Next, manually install the support ring 704 onto the support ring mounting base 703. Adjust the first servo cylinder 8 and the second servo cylinder 10. The first servo cylinder 8 controls the lifting frame 6, the support ring mounting base 703, and the support ring 704 to move upwards and contact the piston rod dummy 13 via the test force sensor 9. The second servo cylinder 10 drives the piston rod dummy 13 to move via the piston rod dummy mounting base 12, initiating friction between the piston rod dummy 13 and the support ring 704. Based on the display signals from the bidirectional force sensor 701, the noise sensor 702, and the test force sensor 9, the friction coefficient curve, the wear condition of the support ring 704 test sample, and the noise curve can be obtained during the test. By comparing and analyzing the friction coefficient, noise, and wear condition of the piston rod dummy and the support ring 704, the optimal match between the piston rod surface and the support ring 704 can be found. By conducting a certain number of friction and wear tests under a certain load, the service life of the support ring 704 under a certain load is estimated based on the wear amount of the support ring 704 wall thickness.

[0024] The support ring 704, which moves vertically, and the piston rod dummy 13, which moves horizontally, are positioned by the first servo electric cylinder 8 and the second servo electric cylinder 10, causing them to contact and rub against each other. Based on the display signals of the bidirectional force sensor 701, the noise sensor 702, and the test force sensor 9 installed in the frame 1, and subsequent calculations, the service life of the support ring 704 under a certain load is estimated based on the wall thickness wear of the support ring 704.

[0025] Processing unit 4 includes: The first push rod 403 is installed inside the fixed frame 2. The telescopic end of the first push rod 403 is connected to the sliding box 3. The first push rod 403 is set as an electric push rod. A fixed pipe 401 is provided above the sliding box 3, and a detachable connecting box 402 is connected to the fixed pipe 401. The first telescopic pipe 404 and the second push rod 405 are installed below the sliding box 3. The second push rod 405 is configured as an electric push rod. The first connecting box 406 is set on the telescopic end of the second push rod 405. The first telescopic pipe 404 is connected to the first connecting box 406. The second push rod 405 is used to adjust the distance between the first connecting box 406 and the sliding box 3. During the process of the second push rod 405 driving the first connecting box 406 to move up or down, the first telescopic pipe 404 undergoes corresponding telescopic changes. An outer ring 407 is installed on the outside of the first connecting box 406, and the outer ring 407 is slidably connected to the outside of the fixing rod 5; The third push rod 408 and the second telescopic pipe 410 are located outside the first connecting box 406. The third push rod 408 is an electric push rod. The first connecting plate 409 is set on the telescopic end of the third push rod 408. The first connecting plate 409 is installed on the outside of the second telescopic pipe 410. The third push rod 408 is used to drive the first connecting plate 409 to move in the horizontal direction. During this process, the first connecting plate 409 drives the second telescopic pipe 410 to undergo corresponding telescopic changes. The connecting pipe 412 installed outside the second telescopic pipe 410 and the contact box 413 connected to the connecting pipe 412 are configured as an arc shape and are made of elastic material. An inclined plate 415 is installed inside the connecting box 402, and a through hole is provided inside the inclined plate 415. An external pipe 414 is installed above the connection box 402 and is connected to an external exhaust fan; A limiting bracket 416 is installed inside the fixed pipe 401 and a spring 417 is installed inside the limiting bracket 416; The second connecting plate 418 and the extension plate 419 connected to the second connecting plate 418 are installed at the end of the spring 417 away from the limit frame 416. The extension plate 419 is set in an arc shape and is adapted to the limit frame 416. When the spring 417 is in its natural state, the extension plate 419 is in the limit frame 416.

[0026] The process of using processing unit 4 to process the sucked-up dust and impurities: Since the external pipe 414, connecting box 402, fixed pipe 401, sliding box 3, first telescopic pipe 404, first connecting box 406, second telescopic pipe 410, connecting pipe 412 and contact box 413 are connected, when the external exhaust fan is started, under the action of gas suction, debris and impurities enter the connecting pipe 412, second telescopic pipe 410, first connecting box 406, first telescopic pipe 404, sliding box 3, fixed pipe 401 and connecting box 402 in sequence through the contact box 413.

[0027] During this process, under the action of gas suction, the second connecting plate 418 and the extension plate 419 move upward, and the spring 417 is stretched. At this time, the extension plate 419 separates from the limit frame 416, and impurities can enter the connecting box 402 through the gap between the two. The impurities are intercepted by the inclined plate 415 and its internal through hole, so that the impurities are intercepted in the connecting box 402.

[0028] When the external exhaust fan is turned off, the spring 417 gradually returns to its original state, and drives the second connecting plate 418 and the extension plate 419 to return to their original positions, intercepting impurities in the connecting box 402 and preventing impurities from moving down through the fixed pipe 401.

[0029] The process of using processing mechanism 4 to process the contact surface of piston rod prosthesis 13: Activate the third push rod 408, which drives the first connecting plate 409, the second telescopic tube 410, the connecting tube 412, and the contact box 413 to move downwards towards the piston rod prosthesis 13 until the contact box 413 is directly below the piston rod prosthesis 13. Adjust the stroke of the second push rod 405, which drives the first connecting box 406 and the contact box 413 to move upwards, so that the contact box 413 is close to the bottom of the piston rod prosthesis 13 and at the edge of the piston rod prosthesis 13.

[0030] The second servo electric cylinder 10 is started, and the second servo electric cylinder 10 drives the piston rod prosthesis fixing seat 12 to move the piston rod prosthesis 13 to slide outside the slide rail 11. During this process, the piston rod prosthesis 13 gradually approaches the concave surface of the contact box 413, and the contact box 413 performs impurity suction.

[0031] By setting up the processing mechanism 4, in the gas suction state, the extension plate 419 separates from the limiting frame 416, providing space for the gas and impurities to move from bottom to top; when the suction work ends, the extension plate 419 enters the limiting frame 416, blocking the path of impurities moving from top to bottom, thereby intercepting a large amount of dust and debris in the detachable connecting box 402.

[0032] By setting up the processing mechanism 4, the distance between the contact box 413 and the piston rod prosthesis 13 is adjusted by the second push rod 405. The piston rod prosthesis 13 is driven to move in the horizontal direction by the second servo electric cylinder 10. The protruding impurities at the bottom of the piston rod prosthesis 13 rub against the contact box 413. During the friction process, the contact box 413 can promote the impurities on the outer surface of the piston rod prosthesis 13 to detach from the piston rod prosthesis 13.

[0033] Processing unit 4 also includes: The first channel 420, the second channel 421 and the groove 422 are opened inside the contact box 413, and the first channel 420 has multiple openings; A first arc-shaped plate 423 is installed inside the groove 422, and a third channel is opened inside the first arc-shaped plate 423. The second channel 421 is located on both sides of the first arc-shaped plate 423 and is used to suck up debris above the first arc-shaped plate 423.

[0034] The second arc-shaped plate 411 is installed inside the groove 422, and the height of the second arc-shaped plate 411 is slightly lower than the height of the first arc-shaped plate 423; A second connecting box 424 is disposed outside the contact box 413 and a fourth channel 425 is opened below the second connecting box 424. The second connecting box 424 is connected to the contact box 413, and the fourth channel 425 is used to suction the support ring 704 located below it. The fourth push rod 426 and the scraper 427 connected to the telescopic end of the fourth push rod 426 are installed inside the contact box 413. The scraper 427 has a ventilation opening inside.

[0035] The process of using processing mechanism 4 to rub and suction the protruding impurities at the bottom of piston rod prosthesis 13: As the concave surface of the contact box 413 rubs against the protruding impurities at the bottom of the piston rod prosthesis 13, under the action of gas suction, most of the impurities on the piston rod prosthesis 13 or the impurities scraped off enter the contact box 413 through the first channel 420, the second channel 421 and the third channel.

[0036] The fourth push rod 426 is periodically activated to the reciprocating motion mode. The fourth push rod 426 drives the scraper 427 to move inside the contact box 413, promoting the restoration of the original state of the contact surface between the contact box 413 and the piston rod prosthesis 13 after friction deformation.

[0037] By setting up a processing mechanism 4, a contact box 413 with a first channel 420, a second channel 421, and a third channel is used to suction the piston rod prosthesis 13. The contact box 413 contacts the protruding impurities at the bottom of the piston rod prosthesis 13, promoting the detachment of impurities from the piston rod prosthesis 13 and preventing impurity particles from wearing down the support ring 704. A groove 422 is formed in the contact box 413, and a first arc-shaped plate 423 and a second arc-shaped plate 411 are set in the groove 422 to collect and suction the impurities in a falling manner.

[0038] Working principle: When using the equipment, first manually install the piston rod prosthesis 13 onto the piston rod prosthesis fixing seat 12. Then adjust the processing mechanism 4 and the second servo electric cylinder 10 to vacuum the lower surface of the piston rod prosthesis 13.

[0039] Activate the third push rod 408, which drives the first connecting plate 409, the second telescopic tube 410, the connecting tube 412, and the contact box 413 to move downwards towards the piston rod prosthesis 13 until the contact box 413 is directly below the piston rod prosthesis 13. Adjust the stroke of the second push rod 405, which drives the first connecting box 406 and the contact box 413 to move upwards, so that the contact box 413 is close to the bottom of the piston rod prosthesis 13 and at the edge of the piston rod prosthesis 13.

[0040] The second servo electric cylinder 10 is started, and the second servo electric cylinder 10 drives the piston rod prosthesis fixing seat 12 to move the piston rod prosthesis 13 to slide outside the slide rail 11. During this process, the piston rod prosthesis 13 gradually approaches the concave surface of the contact box 413, and the contact box 413 performs impurity suction.

[0041] As the concave surface of the contact box 413 rubs against the protruding impurities at the bottom of the piston rod prosthesis 13, under the action of gas suction, most of the impurities on the piston rod prosthesis 13 or the impurities scraped off enter the contact box 413 through the first channel 420, the second channel 421 and the third channel.

[0042] Since the external pipe 414, connecting box 402, fixed pipe 401, sliding box 3, first telescopic pipe 404, first connecting box 406, second telescopic pipe 410, connecting pipe 412 and contact box 413 are connected, when the external exhaust fan is started, under the action of gas suction, debris and impurities enter the connecting pipe 412, second telescopic pipe 410, first connecting box 406, first telescopic pipe 404, sliding box 3, fixed pipe 401 and connecting box 402 in sequence through the contact box 413.

[0043] During this process, under the action of gas suction, the second connecting plate 418 and the extension plate 419 move upward, and the spring 417 is stretched. At this time, the extension plate 419 separates from the limit frame 416, and impurities can enter the connecting box 402 through the gap between the two. The impurities are intercepted by the inclined plate 415 and its internal through hole, so that the impurities are intercepted in the connecting box 402.

[0044] When the external exhaust fan is turned off, the spring 417 gradually returns to its original state, and drives the second connecting plate 418 and the extension plate 419 to return to their original positions, intercepting impurities in the connecting box 402 and preventing impurities from moving down through the fixed pipe 401.

[0045] The support ring 704 is then manually installed on the support ring mounting base 703. The first servo cylinder 8 and the second servo cylinder 10 are adjusted. The first servo cylinder 8 controls the lifting frame 6, the support ring mounting base 703, and the support ring 704 to move upwards and contact the piston rod dummy 13 via the test force sensor 9. The second servo cylinder 10 drives the piston rod dummy 13 to move via the piston rod dummy fixing seat 12. Friction begins between the piston rod dummy 13 and the support ring 704. Based on the display signals from the bidirectional force sensor 701, the noise sensor 702, and the test force sensor 9, the friction coefficient curve, the wear condition of the support ring 704 test sample, and the noise curve can be obtained during the test. By comparing and analyzing the friction coefficient, noise, and wear condition of the piston rod dummy and the support ring 704, the optimal match between the piston rod surface and the support ring 704 is found. Through a certain number of friction and wear tests under a certain load, the service life of the support ring 704 under a certain load is estimated based on the wear amount of the support ring 704 wall thickness.

[0046] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A testing device for the compatibility of piston rod surface with support ring, comprising a frame (1), characterized in that, Also includes: The mounting bracket (2) and the first servo electric cylinder (8) are mounted on the frame (1). The fixed rod (5) is installed inside the fixed frame (2) and the lifting frame (6) is slidably connected to the outside of the fixed rod (5); The slide rail (11) is located inside the fixed frame (2), the piston rod prosthesis fixing seat (12) is slidably connected to the outside of the slide rail (11), and the piston rod prosthesis (13) is installed on the piston rod prosthesis fixing seat (12). The test mechanism (7) is set on the lifting frame (6). The test mechanism (7) includes a support ring mounting seat (703) set on the lifting frame (6) and a support ring (704) mounted on the support ring mounting seat (703). The first servo electric cylinder (8) is used to drive the support ring (704) to contact the piston rod sculptor (13).

2. The piston rod surface and support ring compatibility testing device according to claim 1, characterized in that: Also includes: A sliding box (3) is slidably connected inside the fixed frame (2), and a processing mechanism (4) is connected to the sliding box (3); The test force sensor (9) is installed on the telescopic end of the first servo electric cylinder (8), and the test force sensor (9) is connected to the lifting frame (6); The second servo electric cylinder (10) is installed inside the fixing frame (2). The second servo electric cylinder (10) is used to drive the piston rod prosthesis fixing seat (12) to drive the piston rod prosthesis (13) to slide outside the slide rail (11).

3. The piston rod surface and support ring compatibility testing device according to claim 1, characterized in that: The testing facility (7) also includes: A bidirectional force sensor (701) and a noise sensor (702) are installed on the lifting frame (6). Oil storage grid (705) is installed on the lifting frame (6).

4. The piston rod surface and support ring compatibility testing device according to claim 2, characterized in that: The processing mechanism (4) includes: The first push rod (403) is installed inside the fixed frame (2), and the telescopic end of the first push rod (403) is connected to the sliding box (3); A fixed pipe (401) is provided above the sliding box (3) and a connecting box (402) is connected to the fixed pipe (401). The first telescopic pipe (404) and the second push rod (405) are installed below the sliding box (3); The first connecting box (406) is located on the telescopic end of the second push rod (405), and the first telescopic pipe (404) is connected to the first connecting box (406).

5. The piston rod surface and support ring compatibility testing device according to claim 4, characterized in that: The processing mechanism (4) further includes: An outer ring (407) is installed on the outside of the first connecting box (406), and the outer ring (407) is slidably connected to the outside of the fixing rod (5); The third push rod (408) and the second telescopic pipe (410) are located outside the first connecting box (406); The first connecting plate (409) is disposed on the telescopic end of the third push rod (408), and the first connecting plate (409) is installed on the outside of the second telescopic pipe (410); A connecting pipe (412) installed outside the second expansion pipe (410) and a contact box (413) connected to the connecting pipe (412).

6. The piston rod surface and support ring compatibility testing device according to claim 5, characterized in that: The processing mechanism (4) further includes: Inclined plate (415) installed inside the connecting box (402); The external pipe (414) is installed above the connection box (402).

7. The piston rod surface and support ring compatibility testing device according to claim 6, characterized in that: The processing mechanism (4) further includes: A limiting bracket (416) installed inside the fixed pipe (401) and a spring (417) installed inside the limiting bracket (416). A second connecting plate (418) and an extension plate (419) connected to the second connecting plate (418) are installed at the end of the spring (417) away from the limit bracket (416).

8. The piston rod surface and support ring compatibility testing device according to claim 7, characterized in that: The processing mechanism (4) further includes: A first channel (420), a second channel (421), and a groove (422) are formed inside the contact box (413). The first arc-shaped plate (423) installed inside the groove (422) and the third channel opened inside the first arc-shaped plate (423); The second arc-shaped plate (411) is installed inside the groove (422).

9. The piston rod surface and support ring compatibility testing device according to claim 8, characterized in that: The processing mechanism (4) further includes: A second connecting box (424) is disposed outside the contact box (413), and a fourth channel (425) is opened below the second connecting box (424). The fourth push rod (426) and the scraper (427) connected to the telescopic end of the fourth push rod (426) are installed inside the contact box (413).

Images