A hydraulic damper test bench

Abstract

The present invention relates to the technical field of damper test benches, specifically a hydraulic damper test bench, comprising a base, the upper end of the base is fixedly connected to a support plate, the upper end of the base is fixedly connected to a support block, a fixing mechanism is arranged inside the support block, an air intake pipe is fixedly connected inside the support block, a fitting mechanism is arranged at one end of the air intake pipe, the fitting mechanism comprises a second sleeve, a third sleeve is fixedly connected inside the second sleeve, a sliding plate is slidably connected inside the third sleeve, the second sleeve is cylindrical and provided with a notch, a protective mechanism is arranged inside the second sleeve, an air bag is fixedly connected to the inner surface of the second sleeve, a cooling mechanism is arranged on the inner surface of the air bag, a flow mechanism is arranged near the sliding plate inside the second sleeve; the sliding plate in the second sleeve is arranged to slide out, and the small hole will spray high-pressure gas to form a local cooling domain for the hydraulic damper, the water bag and the sleeve form a natural circulation system through a connecting pipe, and the siphon effect is used to realize cold water supply and hot water replacement.

Description

Technical Field

[0001] The invention relates to the technical field of damper test benches, in particular to a hydraulic damper test bench. Background Art

[0002] The hydraulic damper test bench is a test device specifically designed for testing the performance of hydraulic dampers. It integrates key components such as the hydraulic system, control system, and data acquisition and analysis system. It can simulate the dynamic and static conditions of actual operating environments, allowing for precise and reliable testing of hydraulic dampers. The hydraulic damper test bench comprehensively evaluates various hydraulic damper performance indicators, such as damping force, response time, and displacement characteristics. These performance indicators are crucial for understanding the actual operating capacity of hydraulic dampers and optimizing their designs. During the hydraulic damper production process, the test bench can be used to conduct quality inspections on finished products. Using high-precision sensors and a data acquisition system, the test bench monitors and records various damper performance indicators, such as deformation, stiffness, damping characteristics, and response speed, in real time. The hydraulic damper test bench can also be used for batch testing of dampers during production, ensuring that each product meets performance requirements and improving production efficiency and quality.

[0003] The test bench of the existing technology may generate dangerous factors such as high pressure and high temperature during the test process. If it is not operated properly or the equipment fails, it may cause harm to the operator. The viscosity of the hydraulic oil and the performance of the damper are affected by temperature. Therefore, maintaining a stable temperature can improve the accuracy of the test and control the humidity of the test environment to prevent the hydraulic damper from being damaged by excessive temperature during the test. High temperature accelerates the aging of the rubber sealing ring, resulting in seal failure and oil leakage and splashing. The hydraulic oil is oxidized at high temperature to produce colloidal deposits, which block the damping channel. The high temperature causes the dissolved air in the oil to precipitate and form cavitation, generating noise and vibration to interfere with the test data. These defects not only affect the reliability of the test results, but may also shorten the life of the equipment. In serious cases, the test needs to be interrupted for cooling, which reduces the test efficiency. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a hydraulic damper test bench.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a hydraulic damper test bench, including a base, the upper end of the base is fixedly connected to a support plate, the upper end of the base is fixedly connected to a support block, a fixing mechanism for fixing the hydraulic damper is arranged inside the support block, an air intake pipe is fixedly connected inside the support block, and a fitting mechanism for wrapping the non-output end surface of the hydraulic damper is arranged at one end of the air intake pipe, the fitting mechanism includes a second sleeve, a third sleeve is fixedly connected inside the second sleeve, a sliding plate is slidably connected inside the third sleeve, the second sleeve is cylindrical and provided with a notch, a protective mechanism for closing the notch of the second sleeve is arranged inside the second sleeve, an airbag is fixedly connected to the inner surface of the second sleeve, a cooling mechanism for cooling the non-output end surface of the hydraulic damper is arranged on the inner surface of the airbag, and a flow mechanism for circulating water is arranged near the sliding plate inside the second sleeve.

[0006] Preferably, the upper end of the support block is fixedly connected to the bellows, the upper end of the bellows is fixedly connected to the movable block, the upper end of the movable block is fixedly connected to the output end of the hydraulic cylinder, and the non-output end of the hydraulic cylinder is installed on the surface of the support plate.

[0007] Preferably, the surface of the intake pipe is fixedly connected to the support block, one end of the intake pipe is fixedly connected to a first fixed block, a first sliding rod is slidably connected inside the first fixed block, a first hollow groove is provided inside the first sliding rod, one end of the first sliding rod is fixedly connected to a first piston, the other end of the first sliding rod is fixedly connected to a rubber block, and a first sleeve is provided on the outside of the first piston.

[0008] Preferably, the fixing mechanism also includes a second piston, the second piston is slidably connected inside the first sleeve, the lower end of the second piston is fixedly connected to a second sliding rod, the lower end of the second sliding rod is fixedly connected to a second fixed block, and one end of the second fixed block is fixedly connected to the fixing rod.

[0009] Preferably, the fitting mechanism includes a first connecting tube, the first connecting tube is fixedly connected to the first fixed block, one end of the first connecting tube is fixedly connected to the second connecting tube, one end of the first connecting tube is fixedly connected to the second sleeve, and the inner surface of the second sleeve is fixedly connected to the airbag.

[0010] Preferably, the protection mechanism includes an air outlet pipe, the air outlet pipe is fixedly connected to the inner surface of the second sleeve, and the surface of the air outlet pipe is fixedly connected to the third sleeve.

[0011] Preferably, the protection mechanism further includes a sliding plate, the interior of the third sleeve is elastically connected to the sliding plate via a compression spring, a second hollow groove is provided inside the sliding plate, and a small hole is also provided inside the sliding plate.

[0012] Preferably, the cooling mechanism includes a water bag, which is fixedly connected to the surface of the airbag, one end of the water bag is fixedly connected to a first connecting pipe, and one end of the water bag is fixedly connected to a second connecting pipe.

[0013] Preferably, the flow mechanism includes a rotating shaft, which is rotatably connected to the second sleeve, and one end of the rotating shaft is fixedly connected to the first fan blade.

[0014] Preferably, the flow mechanism further includes a second fan blade, and the other end of the rotating shaft is fixedly connected to the second fan blade.

[0015] Beneficial effects of the present invention:

[0016] The hydraulic damper test bench described in the present invention uses the directional flow of high-pressure gas in a closed pipe to synchronously drive the first piston to move upward and the second piston to move downward to form a coupled motion, thereby achieving efficient energy transfer and component coordination, and then driving the rubber block to move upward and cooperate with the downward movement of the fixing rod to clamp and fix the damper.

[0017] The hydraulic damper test bench described in the present invention blocks the notch of the second sleeve when the sliding plate is slid out, and a small hole is provided inside the sliding plate. When the sliding plate slides out, the small hole inside the small hole will blow out high-pressure gas. The pores of the small hole are small, and the high-pressure gas blown out from the small hole will cool the hydraulic damper and the water bag.

[0018] The hydraulic damper test bench described in the present invention adopts a water bag. The water bag will fit the surface of the non-output end of the hydraulic damper when the airbag is expanded. The water bag fits the surface of the non-output end of the pressure damper to cool the hydraulic damper under test.

[0019] The hydraulic damper test bench described in the present invention forms a jet effect through the throttling action of the high-pressure gas through the outlet pipe, drives the first fan blade to drive the second fan blade to rotate to form a turbine structure, converts the gas pressure energy into rotational mechanical energy, and the rotation of the second fan blade generates a centrifugal force field, which prompts the hot water in the water bag to be discharged radially to the second sleeve. At the same time, the first connecting pipe forms a siphon effect to replenish cold water, constructing a natural circulation system that does not require external pumping, thereby continuously and efficiently cooling the hydraulic damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and examples.

[0021] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 Schematic diagram of the connection structure between the support block and the bellows;

[0023] Figure 3 Schematic diagram of the connection structure between the air intake pipe and the first fixing block;

[0024] Figure 4 Schematic diagram of the rubber block structure;

[0025] Figure 5 Schematic diagram of the first sleeve structure;

[0026] Figure 6 Schematic diagram of the second sleeve structure;

[0027] Figure 7 Schematic diagram of the sliding plate structure;

[0028] Figure 8 for Figure 7 The enlarged structural diagram of part A is shown;

[0029] Figure 9 for Figure 7 The enlarged structural diagram of part B is shown.

[0030] In the figure: 100, base; 101, support plate; 200, support block; 201, bellows; 202, movable block; 203, hydraulic cylinder; 300, fixing mechanism; 301, air inlet pipe; 302, first fixing block; 303, first sliding rod; 304, first hollow groove; 305, first piston; 306, rubber block; 307, first sleeve; 308, second piston; 309, second sliding rod; 310, second fixing block; 311, fixing rod; 400, Fitting mechanism; 401, first connecting tube; 402, second connecting tube; 403, second sleeve; 404, airbag; 500, protective mechanism; 501, air outlet pipe; 502, third sleeve; 503, sliding plate; 5031, second hollow groove; 5032, small hole; 600, cooling mechanism; 601, water bag; 602, first connecting tube; 603, second connecting tube; 700, flow mechanism; 701, rotating shaft; 702, first fan blade; 703, second fan blade. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figures 1-9As shown, a hydraulic damper test bench according to the present invention includes a base 100, the upper end of the base 100 is fixedly connected to a support plate 101, the upper end of the base 100 is fixedly connected to a support block 200, the interior of the support block 200 is provided with a fixing mechanism 300 for fixing the hydraulic damper, the interior of the support block 200 is fixedly connected to an air intake pipe 301, one end of the air intake pipe 301 is provided with a fitting mechanism 400 for wrapping the non-output end surface of the hydraulic damper, the fitting mechanism 400 includes a second sleeve 403, the second sleeve 404 03 is fixedly connected to the inside of the third sleeve 502, and a sliding plate 503 is slidably connected to the inside of the third sleeve 502. The second sleeve 403 is cylindrical and is provided with a notch. A protective mechanism 500 is provided inside the second sleeve 403 for sealing the notch of the second sleeve 403. An airbag 404 is fixedly connected to the inner surface of the second sleeve 403, and a cooling mechanism 600 is provided on the inner surface of the airbag 404 for cooling the non-output end surface of the hydraulic damper. A flow mechanism 700 for circulating water is provided inside the second sleeve 403 near the sliding plate 503.

[0033] Specifically, the upper end of the support block 200 is fixedly connected to the bellows 201, the upper end of the bellows 201 is fixedly connected to the movable block 202, the upper end of the movable block 202 is fixedly connected to the output end of the hydraulic cylinder 203, and the non-output end of the hydraulic cylinder 203 is installed on the surface of the support plate 101.

[0034] In addition, the surface of the intake pipe 301 is fixedly connected to the support block 200, one end of the intake pipe 301 is fixedly connected to the first fixed block 302, the first fixed block 302 is slidably connected to the first sliding rod 303, the first sliding rod 303 is provided with a first hollow groove 304, one end of the first sliding rod 303 is fixedly connected to the first piston 305, the other end of the first sliding rod 303 is fixedly connected to the rubber block 306, the first piston 305 is sleeved with a first sleeve 307, the first sleeve 307 is slidably connected to the second piston 308, the lower end of the second piston 308 is fixedly connected to the second sliding rod 309, the lower end of the second sliding rod 309 is fixedly connected to the second fixed block 310, and one end of the second fixed block 310 is fixedly connected to the fixing rod 311; when in use, the circular ring at the lower end of the hydraulic damper is sleeved into the fixing rod 311 on the second fixed block 310 to tighten the hydraulic damper The circular ring at the upper end is sleeved in the fixed rod 311 on the movable block 202. The fixed structure on the second fixed block 310 is the same as the fixed structure on the movable block 202. High-pressure gas with constant pressure is introduced into the air intake pipe 301. The gas enters the interior of the first fixed block 302 through the air intake pipe 301. The high-pressure gas inside the first fixed block 302 enters the first sleeve 307 through the first hollow groove 304. The high-pressure gas enters the middle of the first piston 305 and the second piston 308 in the first sleeve 307. The high-pressure gas inside the support block 200 will enter the interior of the movable block 202 through the bellows 201. The fixed structure on the second fixed block 310 is the same as the fixed structure on the movable block 202. Therefore, the fixed structure on the movable block 202 will fix the output end of the hydraulic damper, and the movable block 202 is driven to move up and down by the hydraulic cylinder 203. The up and down movement of the movable block 202 drives the hydraulic damper to compress and stretch, thereby testing the hydraulic damper.

[0035] Furthermore, the high-pressure gas inside the first fixed block 302 will also enter the interior of the first connecting tube 401, and the high-pressure gas in the first connecting tube 401 will enter the interior of the airbag 404 through the second connecting tube 402, and the high-pressure gas inside the airbag 404 will be discharged from the outlet pipe 501, and the high-pressure gas discharged from the outlet pipe 501 will enter the interior of the third sleeve 502, and the high-pressure gas will push the first piston 305 to move upward, and the high-pressure gas will push the second piston 308 to move downward, and the downward movement of the second piston 308 will drive the second sliding rod 309 to move downward, and the downward movement of the second sliding rod 309 will drive the second fixed block 310 to move downward, and the second fixed block 310 will move downward. The downward movement will drive the fixed rod 311 to move downward, and the downward movement of the fixed rod 311 will press the hydraulic damper downward. The upward movement of the first piston 305 will drive the first sliding rod 303 to move upward, and the upward movement of the first sliding rod 303 will drive the rubber block 306 to move upward. The upward movement of the rubber block 306 will cooperate with the fixed rod 311 to clamp and fix the damper; through the directional flow of high-pressure gas in the closed pipeline, the first piston 305 is synchronously driven to move upward and the second piston 308 is driven downward to form a coupled motion, realizing efficient energy transmission and component coordination, and then driving the rubber block 306 to move upward will cooperate with the downward movement of the fixed rod 311 to clamp and fix the damper.

[0036] It should be noted that the fitting mechanism 400 includes a first connecting tube 401, the first connecting tube 401 is fixedly connected to the first fixing block 302, one end of the first connecting tube 401 is fixedly connected to the second connecting tube 402, one end of the first connecting tube 401 is fixedly connected to the second sleeve 403, and the inner surface of the second sleeve 403 is fixedly connected to the airbag 404; the high-pressure gas entering the interior of the third sleeve 502 will enter the interior of the second hollow groove 5031, and the high-pressure gas inside the second hollow groove 5031 will push the sliding plate 503 to slide out of the third sleeve 502, and the sliding plate 503 will slide out to cover the notch of the second sleeve 403. The second sleeve 403 is made of copper and has good thermal conductivity. The second sleeve 403 is cylindrical and is provided with an opening. A hydraulic damper can be placed at the opening of the second sleeve 403. The opening of the second sleeve 403 is convenient for placing the hydraulic damper in the second sleeve 403. The sliding plate 503 is provided to block the notch of the second sleeve 403 when it slides out, and a small hole 5032 is provided inside the sliding plate 503. When the sliding plate 503 slides out, the small hole 5032 inside it will blow out high-pressure gas. The pores of the small hole 5032 are small. The high-pressure gas blown out from the small hole 5032 will cool down the hydraulic damper and the water bag 601.

[0037] It is worth mentioning that the protective mechanism 500 includes an air outlet pipe 501, which is fixedly connected to the inner surface of the second sleeve 403. The surface of the air outlet pipe 501 is fixedly connected to a third sleeve 502. The interior of the third sleeve 502 is elastically connected to a sliding plate 503 through a compression spring. A second hollow groove 5031 is provided inside the sliding plate 503, and a small hole 5032 is also provided inside the sliding plate 503.

[0038] Specifically, the cooling mechanism 600 includes a water bag 601, the water bag 601 is fixedly connected to the surface of the air bag 404, one end of the water bag 601 is fixedly connected to a first connecting pipe 602, and one end of the water bag 601 is fixedly connected to a second connecting pipe 603; the interior of the water bag 601 and the interior of the second sleeve 403 are filled with water, the water bag 601 is connected to the second sleeve 403 through the first connecting pipe 602, and the water bag 601 is also connected to the second sleeve 403 through the second connecting pipe 603, the first The connecting tube 602 is made of rubber and has a certain elasticity. The water bag 601 will fit the surface of the non-output end of the hydraulic damper when the airbag 404 expands. Several water bags 601 are arranged on the surface of the airbag 404. The water bags 601 are arranged in strips at equal intervals on the surface of the airbag 404. The water bags 601 are set up, and the water bags 601 will fit the surface of the non-output end of the hydraulic damper when the airbag 404 expands. The water bags 601 fit the surface of the non-output end of the pressure damper to cool down the hydraulic damper under test.

[0039] Finally, the flow mechanism 700 includes a rotating shaft 701, which is rotatably connected to the second sleeve 403, one end of the rotating shaft 701 is fixedly connected to the first fan blade 702, and the other end of the rotating shaft 701 is fixedly connected to the second fan blade 703; the high-pressure gas in the air bag 404 will be discharged through the outlet pipe 501 with smaller pores, and the high-pressure gas discharged from the outlet pipe 501 will drive the first fan blade 702 to rotate, and the rotation of the first fan blade 702 will drive the rotating shaft 701 to rotate, and the rotation of the rotating shaft 701 will drive the second fan blade 703 to rotate, and the rotation of the second fan blade 703 will drive the hotter water in the water bag 601 to flow out into the second sleeve 403, and the cold water inside the second sleeve 403 will flow into the water bag 60 through the first connecting pipe 602. 1, the second sleeve 403 is made of copper, and the second sleeve 403 is provided with a large contact area with the outside world, so that the second sleeve 403 dissipates heat quickly. The hydraulic damper is detected by the high-precision sensor and data acquisition system on the upper end of the support plate 101. The high-pressure gas forms a jet effect through the throttling effect of the outlet pipe 501, driving the first fan blade 702 to drive the second fan blade 703 to rotate to form a turbine structure, converting the gas pressure energy into rotational mechanical energy. The rotation of the second fan blade 703 generates a centrifugal force field, which causes the hot water in the water bag 601 to be discharged radially to the second sleeve 403. At the same time, the first connecting pipe 602 forms a siphon effect to replenish cold water, constructing a natural circulation system without external pumping, thereby continuously and efficiently cooling the hydraulic damper.

[0040] Working principle: The hydraulic damper is provided with collars at both ends. When in use, the circular ring at the lower end of the hydraulic damper is sleeved into the fixed rod 311 on the second fixed block 310, and the circular ring at the upper end of the hydraulic damper is sleeved into the fixed rod 311 on the movable block 202. The fixing structure on the second fixed block 310 is the same as the fixing structure on the movable block 202. High-pressure gas with constant pressure is introduced into the air inlet pipe 301. The gas enters the interior of the first fixed block 302 through the air inlet pipe 301. The high-pressure gas inside the first fixed block 302 enters through the first hollow groove 304. The high-pressure gas enters the first sleeve 307, and enters the middle of the first piston 305 and the second piston 308 in the first sleeve 307. The high-pressure gas inside the support block 200 will enter the inside of the movable block 202 through the bellows 201. The fixed structure on the second fixed block 310 is the same as the fixed structure on the movable block 202, so the fixed structure on the movable block 202 will fix the output end of the hydraulic damper, and the movable block 202 is driven to move up and down by the hydraulic cylinder 203. The movable block 202 moves up and down and drives the hydraulic damper to compress and stretch, thereby testing the hydraulic damper.

[0041] The high-pressure gas inside the first fixed block 302 will also enter the first connecting tube 401, and the high-pressure gas in the first connecting tube 401 will enter the airbag 404 through the second connecting tube 402. The high-pressure gas inside the airbag 404 will be discharged from the outlet pipe 501, and the high-pressure gas discharged from the outlet pipe 501 will enter the third sleeve 502. The high-pressure gas will push the first piston 305 to move upward, and the high-pressure gas will push the second piston 308 to move downward. The downward movement of the second piston 308 will drive the second sliding rod 309 to move downward, and the downward movement of the second sliding rod 309 will drive the second fixed block 310 to move downward. The second fixed block 310 moves downward. The upward movement of the first piston 305 will drive the fixed rod 311 to move downward, and the downward movement of the fixed rod 311 will press the hydraulic damper downward. The upward movement of the first piston 305 will drive the first sliding rod 303 to move upward, and the upward movement of the first sliding rod 303 will drive the rubber block 306 to move upward. The upward movement of the rubber block 306 will cooperate with the fixed rod 311 to clamp and fix the damper; through the directional flow of high-pressure gas in the closed pipeline, the first piston 305 is synchronously driven to move upward and the second piston 308 is driven downward to form a coupled motion, thereby realizing efficient energy transmission and component coordination, thereby driving the rubber block 306 to move upward and cooperating with the fixed rod 311 to clamp and fix the damper.

[0042] The high-pressure gas entering the third sleeve 502 will enter the second hollow groove 5031, and the high-pressure gas inside the second hollow groove 5031 will push the sliding plate 503 to slide out of the third sleeve 502. The sliding plate 503 will slide out and block the notch of the second sleeve 403. The second sleeve 403 is made of copper with good thermal conductivity. The second sleeve 403 is cylindrical and has an opening. A hydraulic damper can be placed at the opening of the second sleeve 403. The opening of the second sleeve 403 is convenient for placing the hydraulic damper in the second sleeve 403; the sliding plate 503 will slide out and block the notch of the second sleeve 403, and a small hole 5032 is provided inside the sliding plate 503. When the sliding plate 503 slides out, the small hole 5032 inside it will blow out high-pressure gas. The pores of the small hole 5032 are small, and the high-pressure gas blown out from the small hole 5032 will cool the hydraulic damper and the water bag 601.

[0043] The interior of the water bag 601 and the interior of the second sleeve 403 are filled with water. The water bag 601 is connected to the second sleeve 403 through the first connecting tube 602. The water bag 601 is also connected to the second sleeve 403 through the second connecting tube 603. The first connecting tube 602 is made of rubber and has a certain elasticity. The water bag 601 will fit the surface of the non-output end of the hydraulic damper when the airbag 404 expands. Several water bags 601 are arranged on the surface of the airbag 404. The water bags 601 are arranged in strips at equal intervals on the surface of the airbag 404; using the set water bag 601, the water bag 601 will fit the surface of the non-output end of the hydraulic damper when the airbag 404 expands. The water bag 601 fits the surface of the non-output end of the pressure damper to cool down the hydraulic damper under test.

[0044] The high-pressure gas in the airbag 404 will be discharged through the outlet pipe 501 with a smaller pore. The high-pressure gas discharged from the outlet pipe 501 will drive the first fan blade 702 to rotate. The rotation of the first fan blade 702 will drive the rotation shaft 701 to rotate. The rotation of the rotation shaft 701 will drive the second fan blade 703 to rotate. The rotation of the second fan blade 703 will drive the hotter water in the water bag 601 to flow out into the second sleeve 403. The cold water inside the second sleeve 403 will flow into the interior of the water bag 601 through the first connecting pipe 602. The second sleeve 403 is made of copper and is provided with a large contact area with the outside world, so that the second sleeve 403 can be used as a cooling medium. 3. Fast heat dissipation. The hydraulic damper is detected by the high-precision sensor and data acquisition system on the upper end of the support plate 101. The high-pressure gas forms a jet effect through the throttling effect of the outlet pipe 501, driving the first fan blade 702 to drive the second fan blade 703 to rotate to form a turbine structure, converting the gas pressure energy into rotational mechanical energy. The rotation of the second fan blade 703 generates a centrifugal force field, which causes the hot water in the water bag 601 to be discharged radially to the second sleeve 403. At the same time, the first connecting pipe 602 forms a siphon effect to replenish cold water, constructing a natural circulation system without external pumping, thereby continuously and efficiently cooling the hydraulic damper.

[0045] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic damper test bench, comprising a base (100), wherein the upper end of the base (100) is fixedly connected to a support plate (101), characterized in that: The upper end of the base (100) is fixedly connected to a support block (200), a fixing mechanism (300) for fixing the hydraulic damper is provided inside the support block (200), an air intake pipe (301) is fixedly connected inside the support block (200), and a fitting mechanism (400) for wrapping the non-output end surface of the hydraulic damper is provided at one end of the air intake pipe (301), the fitting mechanism (400) includes a second sleeve (403), a third sleeve (502) is fixedly connected inside the second sleeve (403), and the third sleeve (502) is fixedly connected inside the second sleeve (403). 2) A sliding plate (503) is slidably connected internally, the second sleeve (403) is cylindrical and provided with a notch, a protective mechanism (500) is provided inside the second sleeve (403) for sealing the notch of the second sleeve (403), an air bag (404) is fixedly connected to the inner surface of the second sleeve (403), a cooling mechanism (600) is provided on the inner surface of the air bag (404) for cooling the non-output end surface of the hydraulic damper, and a flow mechanism (700) for circulating water is provided inside the second sleeve (403) near the sliding plate (503).

2. A hydraulic damper test bench according to claim 1, characterized in that: The upper end of the support block (200) is fixedly connected to the bellows (201), the upper end of the bellows (201) is fixedly connected to the movable block (202), the upper end of the movable block (202) is fixedly connected to the output end of the hydraulic cylinder (203), and the non-output end of the hydraulic cylinder (203) is mounted on the surface of the support plate (101).

3. The hydraulic damper test bench according to claim 2, characterized in that: The surface of the air intake pipe (301) is fixedly connected to the support block (200), one end of the air intake pipe (301) is fixedly connected to a first fixed block (302), the first fixed block (302) is internally slidably connected to a first sliding rod (303), the first sliding rod (303) is internally provided with a first hollow groove (304), one end of the first sliding rod (303) is fixedly connected to a first piston (305), the other end of the first sliding rod (303) is fixedly connected to a rubber block (306), and the first piston (305) is externally sleeved with a first sleeve (307).

4. The hydraulic damper test bench according to claim 3, characterized in that: The fixing mechanism (300) further includes a second piston (308), the second piston (308) is slidably connected inside the first sleeve (307), the lower end of the second piston (308) is fixedly connected to a second sliding rod (309), the lower end of the second sliding rod (309) is fixedly connected to a second fixing block (310), and one end of the second fixing block (310) is fixedly connected to a fixing rod (311).

5. The hydraulic damper test bench according to claim 4, characterized in that: The fitting mechanism (400) comprises a first connecting tube (401), the first connecting tube (401) being fixedly connected to the first fixing block (302), one end of the first connecting tube (401) being fixedly connected to a second connecting tube (402), one end of the first connecting tube (401) being fixedly connected to a second sleeve (403), and an inner surface of the second sleeve (403) being fixedly connected to an airbag (404).

6. The hydraulic damper test bench according to claim 5, characterized in that: The protection mechanism (500) comprises an air outlet pipe (501), the air outlet pipe (501) is fixedly connected to the inner surface of the second sleeve (403), and the surface of the air outlet pipe (501) is fixedly connected to the third sleeve (502).

7. The hydraulic damper test bench according to claim 6, characterized in that: The protection mechanism (500) further comprises a sliding plate (503), the interior of the third sleeve (502) being elastically connected to the sliding plate (503) via a compression spring, a second hollow groove (5031) being provided inside the sliding plate (503), and a small hole (5032) being provided inside the sliding plate (503).

8. The hydraulic damper test bench according to claim 7, characterized in that: The cooling mechanism (600) comprises a water bag (601), wherein the water bag (601) is fixedly connected to the surface of the air bag (404), one end of the water bag (601) is fixedly connected to a first connecting pipe (602), and one end of the water bag (601) is fixedly connected to a second connecting pipe (603).

9. The hydraulic damper test bench according to claim 8, characterized in that: The flow mechanism (700) comprises a rotating shaft (701), the rotating shaft (701) is rotatably connected to the second sleeve (403), and one end of the rotating shaft (701) is fixedly connected to a first fan blade (702).

10. The hydraulic damper test bench according to claim 9, characterized in that: The flow mechanism (700) further comprises a second fan blade (703), and the other end of the rotating shaft (701) is fixedly connected to the second fan blade (703).

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