Oil damper sealing performance detection device

Abstract

The utility model belongs to the technical field of oil damper sealing performance detection devices, and specifically relates to an oil damper sealing performance detection device comprising a detection bench, one end of the detection bench is provided with an air pressure detection device, and the other end of the detection bench is provided with a mounting plate; when an inner cavity cracks, the oil damper is located in a sealed space formed by the first protective shell and the second protective shell which are mutually closed and spliced, leaked media can be blocked, the leaked media are limited in the relatively sealed space, the speed that the leaked media are diffused to the surrounding environment is reduced, and harm to surrounding personnel is reduced; meanwhile, the leaked liquid is flushed and neutralized in time through the purified liquid sprayed out of the spray head, accumulation of the liquid in the sealed space is reduced, the pollution degree is reduced in time, harmful gas or high-temperature and high-pressure gas in the space can be extracted through the gas suction head, and the pollution degree is reduced. And the gas concentration and pressure in the space are rapidly reduced, and harm caused by diffusion of the gas into the surrounding environment is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic shock absorber sealing test device, specifically a hydraulic shock absorber sealing test device. Background Technology

[0002] Hydraulic shock absorbers are vibration damping components mainly used in locomotives and rolling stock. They achieve the purpose of shock absorption by generating hydraulic damping force through the reciprocating motion of a piston rod that stretches and compresses the piston rod, thereby improving ride comfort and vehicle handling stability.

[0003] Hydraulic vibration dampers need to withstand certain pressure and vibration during operation. If the sealing is poor, it will lead to oil leakage, which will affect its vibration damping effect and stability. Currently, when testing the sealing performance of hydraulic vibration dampers, it is common to fill the cavity with liquid or gas medium for testing.

[0004] During the sealing test of hydraulic shock absorbers, when liquid or gas is injected into the cavity, the internal cavity of the shock absorber is prone to cracking due to excessive internal pressure or temperature changes. This can cause the test medium inside the cavity to splatter out, resulting in burns, impact injuries, and environmental pollution. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a hydraulic shock absorber sealing detection device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The hydraulic damper sealing test device of this utility model includes a test platform, one end of which is equipped with a pneumatic testing device, and the other end of which is equipped with a mounting plate; a placement plate is correspondingly provided on the mounting plate; a positive and negative ball screw is rotatably provided on one edge of the mounting plate, and one end of the positive and negative ball screw is connected to the output end of a first servo motor; the two ends of the positive and negative ball screw are respectively symmetrically connected to a first protective shell and a second protective shell by screw-nut pairs; a rotating rod is rotatably provided through the top of the first protective shell, and one end of the rotating rod is connected to the output end of a second servo motor; nozzles and suction heads are equidistantly and alternately provided on the rotating rod, and multiple sets of nozzles are connected to each other through a first connecting main pipe, and multiple sets of suction heads are connected to each other through a second connecting main pipe; one side of the first connecting main pipe is connected to an external water tank through a corrugated pipe, and one side of the second connecting main pipe is connected to an external suction pump through a corrugated pipe.

[0007] Preferably, a first spring post is fixedly connected to the inner wall of both the first protective shell and the second protective shell, and a first clamping plate is installed at the other end of the first spring post; a second clamping plate is elastically slidably connected to one end of both the first protective shell and the second protective shell through a spring.

[0008] Preferably, telescopic rods are fixed to the four corners of the bottom edge of the testing platform, and a base plate is fixed to the other end of the telescopic rods; a screw is fixed to the center of the bottom of the testing platform, and a threaded cylinder is threaded to the outer wall of one end of the screw; the threaded cylinder is rotatably connected to the base plate, and a worm gear is provided on the outer wall of one end of the threaded cylinder, and a worm is engaged on one side of the worm gear.

[0009] Preferably, a limiting baffle is fixedly connected to the testing platform; a second spring post is fixedly connected to the testing platform, and a clamping plate is fixedly connected to one end of the second spring post, and a clamping groove is opened on one side of the clamping plate to fit the thickness of the edge of the mounting plate; the mounting plate and the surface of the testing platform are slidably connected.

[0010] Preferably, one side of the card slot is provided with an arc-shaped gasket, and the arc-shaped gasket is made of an elastic material.

[0011] Preferably, both the first protective shell and the second protective shell are provided with observation windows, and the observation windows are transparent.

[0012] Preferably, a rubber pad is laid on the bottom of the base plate, and the rubber pad has the same shape as the bottom of the base plate.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model provides a hydraulic shock absorber sealing test device. When an internal cavity crack occurs, the hydraulic shock absorber is located in the sealed space formed by the first and second protective shells being joined together. This can block the leaking medium, confining it within the relatively sealed space, reducing its diffusion rate to the surrounding environment and the harm it may cause to people. At the same time, the purifying liquid sprayed from the nozzle promptly flushes and neutralizes the leaked liquid, reducing its accumulation in the sealed space and thus reducing the degree of pollution. Furthermore, the suction head can extract harmful gases or high-temperature and high-pressure gases in the space, quickly reducing the gas concentration and pressure within the space and preventing the gas from diffusing into the surrounding environment and causing harm, thereby improving the safety of the test.

[0015] 2. This utility model provides a hydraulic shock absorber sealing performance testing device. When the hydraulic shock absorber is placed between two protective shells, the first clamping plate will be tightly attached to the outer wall of the hydraulic shock absorber under the elastic force of the first spring column, thereby achieving stable clamping, reducing the movement or shaking of the hydraulic shock absorber during the testing process, and reducing damage to the hydraulic shock absorber caused by excessive clamping. In addition, the first spring column has a certain elasticity and can be finely adjusted according to different hydraulic shock absorber sizes to improve the versatility and flexibility of the equipment. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a perspective view of the first protective shell in this utility model;

[0019] Figure 3 This is a perspective view of the base plate of this utility model;

[0020] Figure 4 This is a perspective view of the card plate in this utility model.

[0021] Legend:

[0022] 1. Testing platform; 2. Air pressure testing equipment; 3. Placement plate; 4. First servo motor; 5. Forward and reverse ball screws; 6. First protective shell; 7. Second protective shell; 8. Second servo motor; 9. Nozzle; 10. Suction head; 11. First connecting main pipe; 12. Second connecting main pipe; 13. Corrugated pipe; 14. First spring column; 15. First clamping plate; 16. Second clamping plate; 17. Spring; 18. Telescopic rod; 19. Screw; 20. Threaded cylinder; 21. Worm gear; 22. Worm; 23. Base plate; 24. Second spring column; 25. Clamping plate; 26. Clamping slot; 27. Limiting baffle; 28. Arc-shaped gasket; 29. ​​Observation window; 30. Rotating rod; 31. Mounting plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] Please see Figure 1 - Figure 4This utility model provides a hydraulic shock absorber sealing performance testing device, including a testing platform 1. A pneumatic testing device 2 is mounted on one end of the testing platform 1, and a mounting plate 31 is mounted on the other end of the testing platform 1. A placement plate 3 is correspondingly provided on the mounting plate 31. A positive and negative ball screw 5 is rotatably mounted on one edge of the mounting plate 31, and one end of the positive and negative ball screw 5 is connected to the output end of a first servo motor 4. A first protective shell 6 and a second protective shell 7 are symmetrically connected to the two ends of the positive and negative ball screw 5 via screw-nut pairs. The first protective shell 6 has a rotating rod 30 rotatably extending through its top end, and one end of the rotating rod 30 is connected to the output end of the second servo motor 8. The rotating rod 30 is provided with nozzles 9 and suction heads 10 at equal intervals. Multiple sets of nozzles 9 are connected to each other through a first connecting main pipe 11, and multiple sets of suction heads 10 are connected to each other through a second connecting main pipe 12. One side of the first connecting main pipe 11 is connected to an external water tank through a corrugated pipe 13, and one side of the second connecting main pipe 12 is connected to an external suction pump through a corrugated pipe 13.

[0026] During operation, the hydraulic vibration damper is placed on the placement plate 3, and the first servo motor 4 is started to rotate forward, driving the forward and reverse ball screws 5 to rotate. This causes the first protective shell 6 and the second protective shell 7 to come together and form a sealed testing space. At this time, only the end of the hydraulic vibration damper is exposed and connected to the air pressure testing device 2. According to the testing requirements, the testing medium is injected into the hydraulic vibration damper. After the test is completed, the first servo motor 4 is started to rotate in reverse, and the first protective shell 6 and the second protective shell 7 move away from each other. The hydraulic vibration damper is then removed. During the testing process, if an internal cavity crack occurs, the hydraulic vibration damper will be located between the first protective shell 6 and the second protective shell 7. Within the sealed space formed by the close-fitting splicing of the shells 7, the leaking medium can be blocked, confining it within a relatively sealed space, reducing its rate of diffusion into the surrounding environment and the harm it may cause to nearby personnel. At the same time, the purifying liquid sprayed through the nozzles 9 promptly flushes and neutralizes the leaking liquid, reducing its accumulation within the sealed space and mitigating the degree of pollution. Furthermore, the suction head 10 can extract harmful gases or high-temperature and high-pressure gases from the space, rapidly reducing the gas concentration and pressure within the space and minimizing the risk of gas diffusion into the surrounding environment, thereby improving the safety of the detection work.

[0027] Please see Figure 1 - Figure 4The first protective shell 6 and the second protective shell 7 are both fixedly connected to the inner walls of the first spring column 14, and the other end of the first spring column 14 is equipped with a first clamping plate 15; the first protective shell 6 and the second protective shell 7 are both elastically slidably connected to the second clamping plate 16 through the spring 17 at one end; during operation, when the hydraulic shock absorber is placed between the two protective shells, the first clamping plate 15 will be tightly attached to the outer wall of the hydraulic shock absorber under the elastic force of the first spring column 14, thereby achieving a stable clamping, reducing the movement or shaking of the hydraulic shock absorber during the testing process, reducing the damage to the hydraulic shock absorber caused by excessive clamping, and the first spring column 14 has a certain elasticity, which can be finely adjusted according to different hydraulic shock absorber sizes to improve the versatility and flexibility of the equipment, while the second clamping plate 16 can clamp the end of the hydraulic shock absorber under the push of the spring 17. At the same time, the size of the connection channel between the hydraulic shock absorber and the air pressure testing equipment 2 at the ends of the two sets of shells can be reduced.

[0028] Please see Figure 1 - Figure 4 The testing platform 1 has telescopic rods 18 fixedly connected to the four corners of its bottom edge, and a base plate 23 fixedly connected to the other end of the telescopic rods 18. A screw 19 is fixedly connected to the center of the bottom of the testing platform 1, and a threaded cylinder 20 is threadedly connected to the outer wall of one end of the screw 19. The threaded cylinder 20 is rotatably connected to the base plate 23, and a worm gear 21 is provided on the outer wall of one end of the threaded cylinder 20, with a worm 22 meshing on one side of the worm gear 21. During operation, by rotating the worm 22 in both directions, the worm gear 21 can be meshed and driven to rotate, thereby driving the threaded cylinder 20 to rotate, so that the screw 19 pushes the testing platform 1 to rise or fall, achieving the effect of changing the overall height of the testing equipment, so as to make flexible adjustments according to the testing scenario.

[0029] Please see Figure 1 - Figure 4 A limiting baffle 27 is fixedly connected to the testing table 1; a second spring post 24 is fixedly connected to the testing table 1, and a retaining plate 25 is fixedly connected to one end of the second spring post 24, and a retaining groove 26 is opened on one side of the retaining plate 25 to fit the edge thickness of the mounting plate 31; the mounting plate 31 is slidably connected to the surface of the testing table 1; during operation, the limiting baffle 27 plays a role in positioning and limiting. Under normal working conditions, the retaining groove 26 will tightly hold the edge of the mounting plate 31, ensuring that the mounting plate 31 is firmly fixed on the testing table 1. When it is necessary to remove the mounting plate 31 for maintenance or replacement, simply pull one end of the second spring post 24 gently to move the retaining plate 25 and the retaining groove 26 away from the mounting plate 31, and the mounting plate 31 can be quickly slid off the testing table 1 to achieve the purpose of quick removal and provide convenience for subsequent replacement work.

[0030] Please see Figure 1 - Figure 4The slot 26 is provided with an arc-shaped gasket 28 on one side, and the arc-shaped gasket 28 is made of elastic material. During operation, due to the characteristics of its elastic material, the arc-shaped gasket 28 can better adapt to the thickness change of the edge of the mounting plate 31, making the fit between the slot 26 and the mounting plate higher. This also improves the connection stability between the two even if the mounting plate 31 has slight manufacturing errors or wear caused by long-term use.

[0031] Please see Figure 1 - Figure 4 Both the first protective shell 6 and the second protective shell 7 are provided with observation windows 29, and the observation windows 29 are transparent. During operation, the detection status of the hydraulic shock absorbers located in the two sets of protective shells can be quickly checked through the observation windows 29.

[0032] Please see Figure 1 - Figure 4 The bottom of the base plate 23 is covered with a rubber pad, and the rubber pad has the same shape as the bottom of the base plate 23. During operation, the rubber pad can increase the friction between the bottom of the base plate 23 and the ground, thereby improving the stability of the device.

[0033] Working principle: By placing the hydraulic vibration damper on the placement plate 3, the first servo motor 4 is started to rotate forward, driving the forward and reverse ball screws 5 to rotate, causing the first protective shell 6 and the second protective shell 7 to come together and form a sealed testing space. At this time, only the end of the hydraulic vibration damper is exposed and connected to the air pressure testing device 2. According to the testing requirements, the testing medium is injected into the hydraulic vibration damper. After the test is completed, the first servo motor 4 is started to rotate in reverse, and the first protective shell 6 and the second protective shell 7 move away from each other, allowing the hydraulic vibration damper to be removed. During the testing process, when an internal cavity crack occurs, the hydraulic vibration damper, located within the sealed space formed by the first protective shell 6 and the second protective shell 7, can block the leakage medium, thus limiting the leakage. Within a relatively sealed space, the speed at which the liquid diffuses into the surrounding environment and the harm it causes to people are reduced. Simultaneously, the purifying liquid sprayed from nozzle 9 promptly flushes and neutralizes any leaks, reducing liquid accumulation within the sealed space and mitigating contamination. Furthermore, the suction head 10 extracts harmful gases or high-temperature, high-pressure gases from the space, rapidly reducing gas concentration and pressure and minimizing their diffusion into the surrounding environment, thus improving the safety of the testing process. When the hydraulic shock absorber is placed between two protective shells, the first clamping plate 15, under the elastic force of the first spring column 14, adheres tightly to the outer wall of the hydraulic shock absorber, achieving a stable clamping effect and reducing the risk of movement or damage during testing. The swaying mechanism reduces damage to the hydraulic damper caused by excessive clamping. The first spring column 14 has a certain degree of elasticity, allowing for fine-tuning according to different hydraulic damper sizes, thus improving the equipment's versatility and flexibility. The second clamping plate 16, pushed by the spring 17, clamps the end of the hydraulic damper. Simultaneously, clamping reduces the size of the connection channels between the hydraulic damper and the pneumatic testing device 2 at the ends of the two housings. By rotating the worm gear 22 in both directions, the worm wheel 21 is engaged and rotated, which in turn rotates the threaded cylinder 20, causing the screw 19 to push the testing platform 1 up or down, thus changing the overall height of the testing equipment for flexible adjustment according to the testing scenario. The limiting baffle 27 serves for positioning and limiting. In normal operation, the slot 26 tightly grips the edge of the mounting plate 31, ensuring that the mounting plate 31 is securely fixed on the testing table 1. When the mounting plate 31 needs to be removed for maintenance or replacement, simply pull one end of the second spring column 24 gently to move the slot 26 away from the mounting plate 31, and the mounting plate 31 can be quickly slid off the testing table 1 for quick removal, facilitating subsequent replacement work. Due to the elasticity of its material, the arc-shaped gasket 28 can better adapt to the thickness variation of the edge of the mounting plate 31, resulting in a higher fit between the slot 26 and the mounting plate. This improves the connection stability even if the mounting plate 31 has slight manufacturing errors or wear due to long-term use.The status of the hydraulic vibration dampers located in the two sets of protective housings can be quickly checked through the observation window 29; the rubber pads increase the friction between the bottom of the base plate 23 and the ground, thereby improving the stability of the device.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sealing performance testing device for a hydraulic shock absorber, comprising a testing platform (1), wherein a pneumatic testing device (2) is mounted on one end of the testing platform (1), and a mounting plate (31) is mounted on the other end of the testing platform (1); a placement plate (3) is correspondingly provided on the mounting plate (31); characterized in that: The mounting plate (31) has a rotating ball screw (5) on one edge, and one end of the ball screw (5) is connected to the output end of the first servo motor (4); the two ends of the ball screw (5) are respectively symmetrically connected to the first protective shell (6) and the second protective shell (7); the top of the first protective shell (6) is rotatably provided with a rotating rod (30), and one end of the rotating rod (30) is connected to the output end of the second servo motor (8); the rotating rod (30) is provided with nozzles (9) and suction heads (10) at equal intervals, and multiple sets of nozzles (9) are connected to each other through the first connecting main pipe (11), and multiple sets of suction heads (10) are connected to each other through the second connecting main pipe (12); one side of the first connecting main pipe (11) is connected to the external water tank through the corrugated pipe (13), and one side of the second connecting main pipe (12) is connected to the external suction pump through the corrugated pipe (13).

2. The hydraulic damper sealing performance testing device as described in claim 1, characterized in that: The inner walls of the first protective shell (6) and the second protective shell (7) are both fixed with a first spring post (14), and the other end of the first spring post (14) is equipped with a first clamping plate (15); the inner walls of the first protective shell (6) and the second protective shell (7) are both elastically slidably connected to a second clamping plate (16) through a spring (17).

3. The hydraulic damper sealing performance testing device as described in claim 1, characterized in that: The bottom edge of the testing platform (1) is fixed with telescopic rods (18) at the four corners, and the other end of the telescopic rods (18) is fixed with a base plate (23); a screw (19) is fixed at the center of the bottom of the testing platform (1), and a threaded cylinder (20) is threadedly connected to the outer wall of one end of the screw (19); the threaded cylinder (20) is rotatably connected to the base plate (23), and a worm gear (21) is provided on the outer wall of one end of the threaded cylinder (20), and a worm (22) is meshed on one side of the worm gear (21).

4. The hydraulic damper sealing performance testing device as described in claim 1, characterized in that: A limiting baffle (27) is fixedly connected to the testing table (1); a second spring column (24) is fixedly connected to the testing table (1), and a clamping plate (25) is fixedly connected to one end of the second spring column (24), and a clamping groove (26) is opened on one side of the clamping plate (25) to fit the edge thickness of the mounting plate (31); the mounting plate (31) and the surface of the testing table (1) are slidably connected.

5. The hydraulic damper sealing performance testing device as described in claim 4, characterized in that: The slot (26) has an arc-shaped gasket (28) on one side, and the arc-shaped gasket (28) is made of elastic material.

6. The hydraulic damper sealing performance testing device as described in claim 1, characterized in that: Both the first protective shell (6) and the second protective shell (7) are provided with observation windows (29), and the observation windows (29) are transparent.

7. The hydraulic damper sealing performance testing device as described in claim 3, characterized in that: The bottom of the base plate (23) is covered with a rubber pad, and the rubber pad has the same shape as the bottom of the base plate (23).

Images