Durability test device for magnetorheological damper

Abstract

The invention discloses a magnetorheological damper durability test device, and particularly relates to the field of magnetorheological dampers, the magnetorheological damper durability test device comprises a box body and a to-be-tested magnetorheological damper, the rear end of the box body is provided with a test cavity with a triangular cross section, and the interiors of the left and right inclined side walls of the test cavity are respectively provided with a liquid storage cavity and an equipment cavity. According to the durability test device for the magneto-rheological damper, the material spraying assembly is arranged, water or powder can be sprayed to the magneto-rheological damper, the device is used for simulating a rainy day environment or simulating a dust and gravel road surface, and the complex environment encountered by the magneto-rheological damper in actual use is truly restored; meanwhile, the amplitude adjusting assembly allows the amplitude of vibration applied to the shock absorber to be accurately and continuously adjusted, and road surfaces with different jolting degrees are simulated. According to the invention, environmental factors such as water, dust, temperature, amplitude, inclination angle and the like can be independently controlled, so that test results can more accurately reflect the durability of the magnetorheological damper under specific working conditions, and data one-sidedness is avoided.

Description

Technical Field

[0001] This invention relates to the field of magnetorheological dampers, and in particular to a durability testing device for magnetorheological dampers. Background Technology

[0002] Magnetorheological dampers are a new type of intelligent damper with online adjustable damping force. Utilizing the non-Newtonian rheological properties of magnetorheological fluids under a magnetic field, they can adjust the damper's damping in real time according to different operating conditions, thereby improving vehicle comfort and handling stability. Due to their superior damping adjustment, fast response, high reliability, and low energy consumption, magnetorheological dampers are increasingly being used in vibration control and vehicle roll stability control, particularly in the context of semi-active suspension systems.

[0003] In the research and development of vehicle rollover prevention control systems using magnetorheological dampers, it is necessary to test the durability of the magnetorheological dampers. However, existing testing devices can only simply measure the damping force generated by the magnetorheological dampers when testing them, which cannot meet other testing requirements of the magnetorheological dampers and cannot accurately reflect the actual usage conditions, resulting in relatively one-sided test data. In view of this, the present invention is proposed. Summary of the Invention

[0004] The main objective of this invention is to provide a durability testing device for magnetorheological dampers, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A durability testing device for a magnetorheological damper includes a housing and a magnetorheological damper to be tested. A test chamber with a triangular cross-section is provided at the rear end of the housing. A liquid storage chamber and an equipment chamber are respectively provided inside the left and right inclined side walls of the test chamber. Support rods are fixedly installed between the triangular bottom and top walls of the test chamber. An adjusting plate and a fixing plate are slidably installed through the outer surfaces of the three support rods. The fixing plate is located above the adjusting plate. A driving component is fixedly installed on the top wall of the test chamber. A force sensor is fixedly installed at the bottom telescopic end of the driving component. The bottom of the force sensor is fixedly connected to the middle of the fixing plate. An angle adjustment assembly is fixedly installed at the bottom of the fixing plate. The top of the magnetorheological damper to be tested is connected to the angle adjustment assembly. The bottom of the magnetorheological damper to be tested is rotatably connected to the middle of the adjusting plate. A displacement sensor is installed at the bottom of the fixing plate. An amplitude adjustment assembly is fixedly installed at the bottom of the test chamber and connected to the bottom of the adjusting plate. A protective door is hinged to one side of the rear end of the test chamber. A spraying assembly is installed inside the test chamber.

[0006] Preferably, a collection chamber is provided at the lower rear end of the housing, located below the test chamber, and a collection drawer is slidably installed inside the collection chamber.

[0007] Preferably, the amplitude adjustment assembly includes a vibration motor and a push rod. The top of the push rod is rotatably connected to the bottom of the adjustment plate via a hinge. The vibration motor is fixedly installed in the middle of the bottom wall of the test chamber. A wheel is fixedly installed at the output end of the vibration motor. A groove is formed at the front end of the wheel. A first support plate and a second support plate distributed on the upper and lower sides of the groove are fixedly installed at the front end of the wheel. A screw is rotatably installed between the first support plate and the second support plate. The bottom of the screw rotatably passes through the second support plate and is fixedly installed with a knob. A slider is threadedly connected to the outer surface of the screw. The rear end of the slider slides in the groove. A connecting rod is fixedly installed at the front end of the slider. The front end of the connecting rod is rotatably connected to the lower part of the rear end of the push rod.

[0008] Preferably, a length scale is fixedly installed at the front end of the wheel, and a first pointer is fixedly installed on one side of the slider, the first pointer matching the length scale.

[0009] Preferably, the angle adjustment assembly includes a hanging plate, a drive motor, a first connecting plate, and a second connecting plate. The hanging plate is fixedly installed at the bottom of a fixed plate. The front end of the hanging plate has two arc-shaped grooves distributed vertically. The first and second connecting plates are distributed on the front and rear sides of the hanging plate. Two sliding rods distributed vertically are fixedly installed between the first and second connecting plates. The two sliding rods slide within the two arc-shaped grooves. An arc-shaped toothed plate is fixedly installed at the middle of the front end of the hanging plate. The drive motor is fixedly installed at the rear end of the first connecting plate. The output end of the drive motor rotates through the first connecting plate and has a gear fixedly installed thereon. The gear meshes with the arc-shaped toothed plate. A disc is fixedly installed at the rear end of the second connecting plate. A rotating rod is rotatably installed in the middle of the disc. A second pointer is fixedly installed on the upper part of the outer surface of the rotating rod. An angle scale line is provided on the surface of the disc. A connecting screw is fixedly installed at the bottom of the rotating rod.

[0010] Preferably, the spraying assembly includes a pump body and a first mounting plate. The pump body is fixedly installed in the liquid storage chamber, and a delivery pipe is fixedly installed at the output end of the pump body. The first mounting plate is fixedly installed at the bottom of the fixed plate. A nozzle is fixedly installed at the end of the first mounting plate facing the magnetorheological damper to be tested. A first conical tube is fixedly installed outside the nozzle. The delivery pipe extends through the test chamber and connects to the nozzle. The liquid storage chamber, pump body, delivery pipe, nozzle, and first conical tube are used to accurately simulate the environment of rain or mud splashing.

[0011] Preferably, the spraying assembly further includes a dust box, a connecting pipe, and a second mounting plate. The dust box is installed inside the equipment cavity, and a discharge pipe is fixedly installed at the bottom of the dust box. The second mounting plate is fixedly installed on the bottom right side of the fixed plate. The end of the second mounting plate facing the magnetorheological damper to be tested has a powder spraying port. A second conical tube is fixedly installed outside the powder spraying port. The connecting pipe is horizontally fixedly installed at the bottom of the equipment cavity. One end of the connecting pipe extends through to the outside of the box, and an inlet fan is fixedly installed on the inner wall of the connecting pipe near the outside. The bottom of the discharge pipe is connected to the middle of the connecting pipe, and the other end of the connecting pipe extends through to the test cavity and is connected to the powder spraying port. A solenoid valve is installed in the middle of the discharge pipe. By utilizing the equipment cavity, dust box, discharge pipe, solenoid valve, connecting pipe, inlet fan, powder spraying port, and second conical tube, the dust environment of a dusty and gravel road surface is effectively simulated. The introduction of the inlet fan ensures the effective transportation and diffusion of dust.

[0012] Preferably, the bottom wall of the test chamber has a collection port that communicates with the inside of the collection chamber, and the collection port is located above the collection drawer.

[0013] Preferably, an electrically heated patch is installed on the side wall of the test chamber.

[0014] Preferably, a water inlet pipe communicating with the liquid storage chamber is installed on the left side of the box, and a feed pipe communicating with the dust box is installed on the right side of the box.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a durability testing device for magnetorheological dampers. It includes a spray assembly that can spray water onto the damper to simulate rainy conditions and spray powder onto it to simulate dusty, gravel roads. These components can be used individually or in combination to realistically recreate the complex environments encountered by magnetorheological dampers in actual use. Electrically heated patches are installed on the sidewalls of the test chamber to simulate the impact of high-temperature operating environments on the damper's performance. A vibration adjustment assembly allows for precise and continuous adjustment of the vibration amplitude applied to the damper, simulating road surfaces with varying degrees of bumpiness. An angle adjustment assembly can precisely change the damper's installation tilt angle to test its durability under different vehicle postures. This invention allows independent control of environmental factors such as water, dust, temperature, vibration amplitude, and tilt angle, enabling test results to more accurately reflect the durability performance of magnetorheological dampers under specific operating conditions and avoiding data bias. Attached Figure Description

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a first left-side sectional view of the overall structure of the present invention; Figure 4 This is a first-view structural diagram of the angle adjustment component of the present invention; Figure 5 This is a second-view structural diagram of the angle adjustment component of the present invention; Figure 6 This is a schematic diagram of the amplitude adjustment component of the present invention; Figure 7 This is a first left-side sectional view of the overall structure of the present invention; Figure 8 This is a right-side view of the overall structure of the present invention; Figure 9 This is a partial structural diagram of the first mounting plate of the spraying assembly of the present invention; Figure 10 This is a partial structural diagram of the second mounting plate of the spraying assembly of the present invention.

[0017] In the diagram: 1. Box body; 2. Protective door; 3. Collection drawer; 4. Support rod; 5. Adjustment plate; 6. Fixing plate; 7. Amplitude adjustment assembly; 8. Angle adjustment assembly; 9. Spraying assembly; 10. Drive component; 11. Force sensor; 12. Displacement sensor; 13. Magnetorheological damper under test; 14. Hinge ear; 15. Electric heating patch; 16. Collection port; 17. Water inlet pipe; 18. Feed pipe; 101. Test chamber; 102. Liquid storage chamber; 103. Collection chamber; 104. Equipment chamber; 81. Hanging plate; 82. Drive motor; 83. First connecting plate; 84. Second connecting plate; 85. Slide rod; 86. Rotating rod; 87. Disc; 88. Second finger 89. Needle; 811. Connecting screw sleeve; 812. Arc groove; 813. Arc toothed plate; 814. Gear; 71. Vibration motor; 72. Wheel; 73. First support plate; 74. Second support plate; 75. Knob; 76. Screw; 77. Slider; 78. Connecting rod; 79. Top rod; 710. Length scale; 711. First pointer; 91. Pump body; 92. Conveying pipe; 94. Dust box; 95. Connecting pipe; 96. Feeding pipe; 97. Solenoid valve; 99. Inlet fan; 910. First mounting plate; 911. Nozzle; 912. First conical tube; 913. Second mounting plate; 914. Powder spray nozzle; 915. Second conical tube; 721. Slide groove. Detailed Implementation

[0018] 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.

[0019] Example 1 join Figure 1-10As shown, a magnetorheological damper durability testing device includes a housing 1 and a magnetorheological damper 13 to be tested. A test chamber 101 with a triangular cross-section is provided at the rear end of the housing 1. A liquid storage chamber 102 and an equipment chamber 104 are respectively formed inside the left and right inclined side walls of the test chamber 101. The triangular structure optimizes space utilization, and the inclined side walls naturally form the positions for installing the liquid storage chamber 102 and the equipment chamber 104, avoiding the need for external additional equipment and making the device structure compact. The liquid storage chamber 102 stores liquid (water / slurry), and the equipment chamber 104 accommodates a dust box and pipelines, physically isolated from the test chamber 101 to avoid cross-contamination. Each system operates independently. Support rods 4 are fixedly installed between the triangular bottom and top walls of the test chamber 101. Adjustment plates 5 and fixed plates 6 are slidably installed through the outer surfaces of the three support rods 4. The fixed plate 6 is located above the adjustment plate 5. A driving component 10 is fixedly installed on the top wall of the test chamber 101. A force sensor 11 is fixedly installed at the bottom telescopic end of the driving component 10. The bottom of the force sensor 11 is fixedly connected to the middle of the fixed plate 6. An angle adjustment assembly 8 is fixedly installed at the bottom of the fixed plate 6. The top of the magnetorheological damper 13 to be tested is connected to the angle adjustment assembly 8. The bottom of the shock absorber 13 is rotatably connected to the middle of the adjusting plate 5. A displacement sensor 12 is installed at the bottom of the fixed plate 6. An amplitude adjustment component 7 is fixedly installed at the bottom of the test chamber 101. The amplitude adjustment component 7 is connected to the bottom of the adjusting plate 5. A spraying component 9 is installed inside the test chamber 101. A protective door 2 is hinged to one side of the rear end of the test chamber 101. A transparent tempered heat-insulating glass is fixedly installed in the middle of the protective door 2. An upper hinge lug 14 is installed on the adjusting plate 5. A collection chamber 103 is opened at the lower rear end of the housing 1, located below the test chamber 101. A collection drawer 3 is slidably installed inside the collection chamber 103. The test chamber 101 is equipped with an electric heating patch 15 on its side wall to simulate a high-temperature environment. The bottom wall of the test chamber 101 has a collection port 16 that communicates with the collection chamber 103. The collection port 16 is located above the collection drawer 3. Water and dust generated during the test are collected into the collection drawer through the collection port 16. The design of the collection port 16 and the collection drawer 3 solves the problem of cleaning up test waste. The damping force of the shock absorber is monitored in real time by the force sensor 11 to evaluate the performance degradation. The vibration stroke is recorded by the displacement sensor 12. The energy consumption and fatigue characteristics are calculated by combining the force data. The key performance parameters of the shock absorber under dynamic load can be obtained at the same time.

[0020] In this embodiment, the driving component 10 can be a common vertical pressurization structure such as an existing cylinder, hydraulic cylinder, or electric telescopic cylinder. During testing, the bottom of the magnetorheological damper 13 to be tested is hinged to the upper hinge lug 14 by bolts, and the top is threaded to the angle adjustment component 8. As shown in the attached figure, the temperature in the test chamber 101 is controlled by the electric heating patch 15. The control valve can be opened separately to simulate a rainy driving environment, and the solenoid valve 97 can be opened separately to simulate a sunny driving environment with a lot of dust. This can simulate the actual use environment of the vehicle's magnetorheological damper, which can greatly improve the accuracy of the test results. At the same time, during use, the vibration amplitude of the magnetorheological damper 13 to be tested can be adjusted by adjusting the distance between the slider 77 and the center of the wheel 72. The greater the distance between the slider 77 and the center of the wheel 72, the greater the vibration amplitude of the magnetorheological damper 13 under test; conversely, the smaller the distance between the slider 77 and the center of the wheel 72, the smaller the vibration amplitude of the magnetorheological damper 13 under test. This facilitates testing the durability of the magnetorheological damper 13 under test at different vibration amplitudes, simulating the vibration amplitude experienced by the magnetorheological damper during vehicle travel on different bumpy roads. At the same time, the angle adjustment component 8 can change the angle of the magnetorheological damper under test, allowing testing of its own durability at different tilt angles. This invention can independently control environmental factors such as water, dust, and temperature, enabling the test results to more accurately reflect the durability performance of the magnetorheological damper under specific working conditions and avoiding data bias.

[0021] Example 2 join Figure 6 As shown, the amplitude adjustment assembly 7 includes a vibration motor 71 and a push rod 79. The top of the push rod 79 is rotatably connected to the bottom of the adjustment plate 5 via a hinge. The vibration motor 71 is fixedly installed in the middle of the bottom wall of the test chamber 101. A wheel 72 is fixedly installed at the output end of the vibration motor 71. A groove 721 is opened at the front end of the wheel 72. A first support plate 73 and a second support plate 74 distributed on the upper and lower sides of the groove 721 are fixedly installed at the front end of the wheel 72. A screw 76 is rotatably installed between the first support plate 73 and the second support plate 74. The bottom of the screw 76 rotatably passes through the second support plate 74 and... A knob 75 is fixedly installed. A slider 77 is threadedly connected to the outer surface of the screw 76. The rear end of the slider 77 slides in the groove 721. A connecting rod 78 is fixedly installed at the front end of the slider 77. The front end of the connecting rod 78 is rotatably connected to the lower rear end of the top rod 79. A length scale 710 is fixedly installed at the front end of the wheel 72. A first pointer 711 is fixedly installed on one side of the slider 77. The first pointer 711 matches the length scale 710. The amplitude can be accurately adjusted according to actual needs. The design of the knob 74 and the length scale 710 makes the adjustment process quantifiable and visible, ensuring the repeatability of experimental parameters.

[0022] In this embodiment, the adjusting plate 5, constrained by the support rod 4, can only move up and down due to the top plate. When the vibration motor 71 drives the wheel 72 to rotate, it drives the slider 77 to rotate around the central axis of the wheel 72, causing the top plate to swing and the adjusting plate 5 to move up and down. The adjusting plate 5 is connected to the magnetorheological damper, thereby driving the magnetorheological damper to vibrate. During the test, when the knob 75 is turned clockwise, the knob 75 drives the screw 76 to rotate, causing the slider 77 to move outward along the extension direction of the screw 76. The distance between the slider 77 and the center of the wheel 72 increases, and the vibration amplitude of the magnetorheological damper increases. Conversely, when the knob 75 is turned counterclockwise, the distance between the slider 77 and the center of the wheel 72 decreases, and the vibration amplitude of the magnetorheological damper decreases. This facilitates the testing of the durability of the magnetorheological damper at different vibration amplitudes and solves the problem that existing test devices can usually only adjust the vibration frequency but not the vibration amplitude, leading to inconvenience in testing.

[0023] Example 3 Reference Figure 4-5 As shown, the angle adjustment assembly 8 includes a hanging plate 81, a drive motor 82, a first connecting plate 83, and a second connecting plate 84. The hanging plate 81 is fixedly installed at the bottom of the fixed plate 6. The front end of the hanging plate 81 has two vertically distributed arc-shaped grooves 811. The first connecting plate 83 and the second connecting plate 84 are distributed on the front and rear sides of the hanging plate 81. Two vertically distributed sliding rods 85 are fixedly installed between the first connecting plate 83 and the second connecting plate 84. The two sliding rods 85 slide within the two arc-shaped grooves 811. The middle of the front end of the hanging plate 81 is fixed. An arc-shaped toothed plate 812 is installed. The drive motor 82 is fixedly installed at the rear end of the first connecting plate 83. The output end of the drive motor 82 rotates through the first connecting plate 83 and is fixedly installed with a gear 813. The gear 813 meshes with the arc-shaped toothed plate 812. A disc 87 is fixedly installed at the rear end of the second connecting plate 84. A rotating rod 86 is rotatably installed in the middle of the disc 87. A second pointer 88 is fixedly installed on the upper part of the outer surface of the rotating rod 86. An angular scale line is provided on the surface of the disc 87. A connecting screw sleeve 89 is fixedly installed at the bottom of the rotating rod 86.

[0024] In this embodiment, the screw sleeve and the top of the magnetorheological damper 13 under test are threaded together. When the tilt angle of the magnetorheological damper 13 under test needs to be adjusted, the drive motor 82 starts, driving the gear 813 to rotate. When the gear 813 rotates, it cooperates with the arc-shaped toothed plate 812, which can drive the slide rod 85 to move along the arc-shaped groove 811 for adjustment. This causes the second connecting plate 84 to slide along the arc-shaped trajectory of the arc-shaped groove 811, thereby tilting the top of the magnetorheological damper 13 under test. During the movement of the second connecting plate 84, the screw sleeve drives the rotating rod 86 and the disk 87 to rotate, causing the second pointer 88 to rotate on the angle scale line. This allows for precise adjustment of the tilt angle of the magnetorheological damper, thereby testing the durability of the magnetorheological damper at different tilt angles. Precise control of the damper installation angle simulates vehicle cornering roll or different suspension postures. Implementation 4 Reference Figure 7-10As shown, the spray assembly 9 includes a pump body 91 and a first mounting plate 910. The pump body 91 is fixedly installed in the liquid storage chamber 102. A delivery pipe 92 is fixedly installed at the output end of the pump body 91. The first mounting plate 910 is fixedly installed at the bottom of the fixed plate 6. A nozzle 911 is fixedly installed at the end of the first mounting plate 910 facing the magnetorheological damper 13 to be tested. A first tapered tube 912 is fixedly installed outside the nozzle 911. The delivery pipe 92 extends through the nozzle 911 into the test chamber 101 and connects with the nozzle 911. The connection includes a control valve installed on the conveying pipe 92; the spraying assembly 9 also includes a dust box 94, a connecting pipe 95, and a second mounting plate 913. The dust box 94 is installed inside the equipment cavity 104, and a discharge pipe 96 is fixedly installed at the bottom of the dust box 94. The second mounting plate 913 is fixedly installed on the bottom right side of the fixing plate 6. The end of the second mounting plate 913 facing the magnetorheological damper 13 to be tested has a powder spraying port 914, and a second tapered pipe 915 is fixedly installed outside the powder spraying port 914. A pipe 95 is horizontally fixedly installed at the bottom of the equipment cavity 104. One end of the connecting pipe 95 extends through to the outside of the housing 1, and an inlet fan 99 is fixedly installed on the inner wall of the connecting pipe 95 near the outside. The bottom of the discharge pipe 96 is connected to the middle of the connecting pipe 95, and the other end of the connecting pipe 95 extends through to the test cavity 101 and is connected to the powder spraying port 914. A solenoid valve 97 is installed in the middle of the discharge pipe 96. A water inlet pipe 17 connected to the liquid storage cavity 102 is installed on the left side of the housing 1, and a dust inlet pipe is installed on the right side of the housing 1. The feed pipe 18 is connected inside the box 94. The pump body 91 draws water from the liquid storage chamber and sends it to the nozzle 911 through the delivery pipe 92. The first conical pipe 912 focuses the spray to simulate rain / muddy environment and verify the sealing performance and liquid erosion resistance of the shock absorber. The conical pipe improves the water flow impact accuracy and specifically covers the surface of the shock absorber. The dust box 94 is controlled by the solenoid valve 97 to discharge the material. The fan 99 blows the dust into the connecting pipe 95 and diffuses it through the powder spraying port 914 of the second conical pipe 915 to simulate a sandy road surface and test the effect of dust intrusion on the wear of the shock absorber.

[0025] In this embodiment, water is added to the water storage chamber through the water inlet pipe 17, and dust is added to the dust box 94 through the feed pipe 18. During the test, the pump body 91 is started, and water is delivered to the nozzle 911 through the delivery pipe 92. Then, the nozzle 911 sprays water onto the magnetorheological damper to simulate water splashing on the magnetorheological damper during the driving of an existing vehicle. The solenoid valve 97 is opened, and the dust is delivered to the connecting pipe 95 through the feed pipe 96. Then, the fan 99 blows the dust in the connecting pipe 95 towards the powder spraying port 914, and blows it onto the magnetorheological damper through the powder spraying port 914 to simulate dust splashing on the magnetorheological damper during the driving of an existing vehicle. This embodiment can test the durability of the magnetorheological damper in rainy environments and dusty road surfaces.

[0026] 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 embodiments. The above 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 protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A durability testing device for a magnetorheological damper, comprising a housing (1) and a magnetorheological damper (13) to be tested, characterized in that: The rear end of the housing (1) is provided with a test chamber (101) with a triangular cross-section. The left and right inclined side walls of the test chamber (101) are respectively provided with a liquid storage chamber (102) and an equipment chamber (104). Support rods (4) are fixedly installed between the bottom and top triangular walls of the test chamber (101). An adjustment plate (5) and a fixing plate (6) are slidably installed through the outer surfaces of the three support rods (4). The fixing plate (6) is located above the adjustment plate (5). A driving component (10) is fixedly installed on the top wall of the test chamber (101). A force sensor (11) is fixedly installed at the bottom telescopic end of the driving component (10). The bottom is fixedly connected to the middle of the fixed plate (6), and the bottom of the fixed plate (6) is fixedly installed with an angle adjustment component (8). The top of the magnetorheological damper (13) to be tested is connected to the angle adjustment component (8). The bottom of the magnetorheological damper (13) to be tested is rotatably connected to the middle of the adjustment plate (5). The bottom of the fixed plate (6) is installed with a displacement sensor (12). The bottom of the test chamber (101) is fixedly installed with an amplitude adjustment component (7). The amplitude adjustment component (7) is connected to the bottom of the adjustment plate (5). The rear end of the test chamber (101) has a protective door (2) through a hinge. The test chamber (101) is equipped with a spraying component (9).

2. The magnetorheological damper durability testing device according to claim 1, characterized in that: The lower rear end of the housing (1) is provided with a collection chamber (103) located below the test chamber (101), and a collection drawer (3) is slidably installed in the collection chamber (103).

3. The magnetorheological damper durability testing device according to claim 1, characterized in that: The amplitude adjustment assembly (7) includes a vibration motor (71) and a push rod (79). The top of the push rod (79) is rotatably connected to the bottom of the adjustment plate (5) via a hinge. The vibration motor (71) is fixedly installed in the middle of the bottom wall of the test chamber (101). A wheel (72) is fixedly installed at the output end of the vibration motor (71). A groove (721) is opened at the front end of the wheel (72). A first support plate (73) and a second support plate (74) distributed on the upper and lower sides of the groove (721) are fixedly installed at the front end of the wheel (72). A support plate (74) is provided. A screw (76) is rotatably installed between the first support plate (73) and the second support plate (74). The bottom of the screw (76) rotatably passes through the second support plate (74) and is fixedly installed with a knob (75). A slider (77) is threadedly connected to the outer surface of the screw (76). The rear end of the slider (77) slides in the slide groove (721). A connecting rod (78) is fixedly installed at the front end of the slider (77). The front end of the connecting rod (78) is rotatably connected to the lower part of the rear end of the top rod (79).

4. The magnetorheological damper durability testing device according to claim 3, characterized in that: A length scale (710) is fixedly installed at the front end of the wheel (72), and a first pointer (711) is fixedly installed on one side of the slider (77). The first pointer (711) matches the length scale (710).

5. The magnetorheological damper durability testing device according to claim 1, characterized in that: The angle adjustment assembly (8) includes a hanging plate (81), a drive motor (82), a first connecting plate (83), and a second connecting plate (84). The hanging plate (81) is fixedly installed at the bottom of the fixed plate (6). The front end of the hanging plate (81) has two arc-shaped grooves (811) distributed vertically. The first connecting plate (83) and the second connecting plate (84) are distributed on the front and rear sides of the hanging plate (81). Two sliding rods (85) are fixedly installed between the first connecting plate (83) and the second connecting plate (84). The two sliding rods (85) slide in the two arc-shaped grooves (811). The middle of the front end of the hanging plate (81) is fixed. An arc-shaped toothed plate (812) is installed. The drive motor (82) is fixedly installed at the rear end of the first connecting plate (83). The output end of the drive motor (82) rotates through the first connecting plate (83) and is fixedly installed with a gear (813). The gear (813) meshes with the arc-shaped toothed plate (812). A disc (87) is fixedly installed at the rear end of the second connecting plate (84). A rotating rod (86) is rotatably installed in the middle of the disc (87). A second pointer (88) is fixedly installed on the upper part of the outer surface of the rotating rod (86). An angular scale line is provided on the surface of the disc (87). A connecting screw sleeve (89) is fixedly installed at the bottom of the rotating rod (86).

6. The magnetorheological damper durability testing device according to claim 1, characterized in that: The spray assembly (9) includes a pump body (91) and a first mounting plate (910). The pump body (91) is fixedly installed in the liquid storage chamber (102). A delivery pipe (92) is fixedly installed at the output end of the pump body (91). The first mounting plate (910) is fixedly installed at the bottom of the fixed plate (6). A nozzle (911) is fixedly installed at one end of the first mounting plate (910) facing the magnetorheological damper (13) to be tested. A first tapered tube (912) is fixedly installed outside the nozzle (911). The delivery pipe (92) extends through into the test chamber (101) and is connected to the nozzle (911).

7. The magnetorheological damper durability testing device according to claim 6, characterized in that: The spraying assembly (9) also includes a dust box (94), a connecting pipe (95), and a second mounting plate (913). The dust box (94) is installed inside the equipment cavity (104), and a discharge pipe (96) is fixedly installed at the bottom of the dust box (94). The second mounting plate (913) is fixedly installed on the bottom right side of the fixing plate (6). The end of the second mounting plate (913) facing the magnetorheological damper (13) to be tested has a powder spraying port (914). A second mounting plate (913) is fixedly installed on the outside of the powder spraying port (914). Two conical tubes (915), the connecting tube (95) is horizontally fixedly installed at the bottom of the equipment cavity (104), one end of the connecting tube (95) extends through to the outside of the box (1), and the inner wall of the connecting tube (95) is fixedly installed near the outside with an inlet fan (99), the bottom of the discharge tube (96) is connected to the middle of the connecting tube (95), the other end of the connecting tube (95) extends through to the test cavity (101) and is connected to the powder spraying port (914), and a solenoid valve (97) is installed in the middle of the discharge tube (96).

8. The magnetorheological damper durability testing device according to claim 7, characterized in that: The bottom wall of the test chamber (101) is provided with a collection port (16) that communicates with the inside of the collection chamber (103), and the collection port (16) is located above the collection drawer (3).

9. The magnetorheological damper durability testing device according to claim 1, characterized in that: The test chamber (101) is equipped with an electrically heated patch (15) on its side wall.

10. The magnetorheological damper durability testing device according to claim 7, characterized in that: The left side of the box (1) is equipped with a water inlet pipe (17) that communicates with the liquid storage chamber (102), and the right side of the box (1) is equipped with a feed pipe (18) that communicates with the dust box (94).

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