Shock absorber valve hydraulic test system

Abstract

The utility model discloses a hydraulic test system for a damper valve. The hydraulic test system comprises an oil supply system, a test system and a damper valve body, the oil supply system can convey test oil into the test system, the test system is connected with an oil inlet of the damper valve body through a test oil pipe, and the test system comprises a test pump set, a flow control assembly and a first pressure test assembly which are sequentially arranged along the test oil pipe. The flow control assembly comprises a servo valve and a flow meter forming a closed loop with the servo valve, and a second pressure measuring assembly is arranged at an oil outlet of the shock absorber valve body. According to the utility model, the pressure and flow passing through the damper valve under different currents can be automatically detected, and the detection efficiency of various performance indexes of the damper valve is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic testing, in particular to a hydraulic testing system for a shock absorber valve. Background Art

[0002] Once a traditional shock absorber is designed, its damping is essentially fixed. To meet more vehicle demands and balance comfort and handling according to varying road conditions, there is a growing demand for shock absorbers with adjustable damping. There are two main approaches to achieving adjustable damping: one is to switch to a fluid with adjustable physical properties, such as magnetorheological dampers (which are expensive and difficult to exploit due to their fluid properties). The other is to control the fluid flow, such as with CDC shock absorbers.

[0003] CDC (Continuous Damping Control) is a shock absorber system with adjustable damping force.

[0004] CDC shock absorbers are based on traditional hydraulic shock absorber construction. They contain two chambers, each filled with hydraulic fluid, connected by a small aperture between them to allow fluid flow. When the wheel experiences a bump, the piston in the shock absorber moves up and down within its sleeve, causing the reciprocating motion of the piston to cause the hydraulic fluid in the chamber to flow back and forth between the two chambers. The two chambers are filled with hydraulic fluid, and a small aperture connects them, allowing the fluid to flow.

[0005] When the wheel experiences a bump, the piston in the shock absorber moves up and down within the sleeve, causing the hydraulic oil in the chamber to flow between the inner and outer chambers under the action of the piston, which also creates resistance on the piston. By varying the resistance during the oil flow, the resistance of the piston can be adjusted, and thus the damping of the shock absorber.

[0006] By adjusting the size of the small hole between the inner and outer chambers, the resistance of the hydraulic fluid can be adjusted. This is because, given a constant flow rate, the size of the small hole and the resistance of the hydraulic fluid are proportional. By controlling the shock absorber valve to change the size of the small hole, the resistance of the fluid as it reciprocates between the inner and outer chambers can be adjusted, thereby changing the damping characteristics of the shock absorber. Therefore, it is particularly important to test the performance indicators of shock absorber valves after production to ensure they meet test standards.

[0007] Therefore, the present application provides a shock absorber valve hydraulic test system to solve the above problems. Utility Model Content

[0008] In order to overcome the above shortcomings, the purpose of the present invention is to provide a shock absorber valve hydraulic testing system that can automatically detect the pressure and flow passing through the shock absorber valve under different currents, effectively improving the detection efficiency of various performance indicators of the shock absorber valve.

[0009] In order to achieve the above objectives, the technical solution adopted by the utility model is: a shock absorber valve hydraulic test system, including an oil supply system, a test system and a shock absorber valve body; the oil supply system can transport test oil to the test system, and the test system is connected to the oil inlet of the shock absorber valve body through a test oil pipe. The test system includes a test pump group, a flow control component and a pressure measuring component 1 arranged in sequence along the test oil pipe, the flow control component includes a servo valve and a flow meter forming a closed loop with the servo valve, and the oil outlet of the shock absorber valve body is provided with a pressure measuring component 2.

[0010] Furthermore, the oil supply system includes a dirty oil tank and a clean oil tank connected by an oil inlet pipe. A circulating pump assembly, a one-way valve, an oil temperature controller, and a high-pressure filter are sequentially installed along the length of the oil inlet pipe. A protective oil pipe connected to the dirty oil tank is installed between the circulating pump assembly and the one-way valve. This protective oil pipe is equipped with a manual relief valve and a pressure switch. The test oil in the dirty oil tank is regulated for temperature and cleanliness by the oil temperature controller and the high-pressure filter, respectively, ensuring that the test oil entering the clean oil tank meets the testing requirements of the subsequent testing system. The protective oil pipe limits the maximum pressure of the oil supply system, protecting the entire system.

[0011] Furthermore, the first pressure measuring assembly includes a first pressure sensor and a temperature sensor, while the second pressure measuring assembly includes a second pressure sensor. Pressure sensor one and pressure sensor two can respectively monitor the pressure of the test oil before and after it passes through the shock absorber valve, thereby subsequently generating a test curve corresponding to the flow rate. The temperature sensor can monitor the temperature of the medium entering the shock absorber valve body to ensure that the medium temperature meets the test requirements.

[0012] Furthermore, the test oil pipe is sequentially equipped with a one-way valve, a manual relief valve, a proportional relief valve, a high-pressure filter, a solenoid ball valve, and a pressure compensator, located between the test pump assembly and the flow control assembly. The one-way valve ensures that the clean oil in the oil tank does not flow back into the shock absorber valve body after being input, preventing the used test oil from mixing with the clean oil. The high-pressure filter is used to re-filter the test oil entering the test system to prevent the cleanliness of the test oil entering the test system. The solenoid ball valve is used to control the oil supply system's entry into the test system. The pressure compensator is used to stabilize the pressure and flow at the inlet and outlet of the servo valve.

[0013] Furthermore, a channel for returning the used test oil is formed between the oil outlet of the shock absorber valve body and the dirty oil tank through the return pipe.

[0014] Furthermore, both the dirty and clean oil tanks are equipped with a visual level gauge and an oil drain port on their sides. Air filters and level and temperature sensors are installed inside each tank. The air filters effectively remove or reduce solid particles, microorganisms, or other harmful substances in the air inside the dirty and clean oil tanks, ensuring the cleanliness of the test oil. The level and temperature sensors monitor the temperature of the test oil entering the oil inlet pipe and provide feedback to the oil temperature controller, which allows the controller to further adjust the test oil temperature to meet test requirements.

[0015] Furthermore, the test pump set is a variable frequency pump set. During the test process, the flow rate of the shock absorber valve body changes from small to large, and the variable frequency pump set can well achieve accurate control of its flow rate.

[0016] Furthermore, the oil outlet of the shock absorber valve body is also provided with a manual throttle valve, which can be used to adjust the back pressure of the shock absorber valve body outlet.

[0017] Beneficial effects of the utility model:

[0018] 1. In this utility model, the oil supply system and the test system cooperate with each other. The oil supply system continuously provides the test system with the test oil that meets the test requirements through the circulation pump group and the oil temperature function, thereby ensuring the test efficiency of the shock absorber valve;

[0019] 2. In the test system of the present invention, the flow control component, the test pump group, the pressure measuring component 1 and the pressure measuring component 2 cooperate with each other. The servo valve provides different currents to output corresponding modulated flow to the shock absorber valve body. The pressure measuring component 1 and the pressure measuring component 2 can respectively measure the pressure before and after the test oil of the corresponding flow passes through the shock absorber valve body, and then automatically generate a curve between the front and rear pressures and the flow, thereby effectively improving the detection efficiency of various performance indicators of the shock absorber valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall hydraulic principle diagram of an embodiment of the utility model;

[0021] In the figure: 1. Fuel supply system; 2. Dirty fuel tank; 3. Clean fuel tank; 4. Oil drain port; 5. Air filter; 6. Liquid level and temperature sensor; 7. Visual liquid level gauge; 8. Circulation pump group; 9. Oil inlet pipe; 10. One-way valve; 11. Protective oil pipe; 12. Pressure switch; 13. Manual relief valve; 14. Oil temperature controller; 15. High-pressure filter; 16. Test system; 17. Test pump group; 18. Test oil pipe; 19. Proportional relief valve; 20. Flow control assembly; 200. Servo valve; 201. Flow meter; 21. Pressure compensator; 22. Solenoid ball valve; 231. Pressure sensor 1; 232. Temperature sensor; 24. Shock absorber valve body; 251. Pressure sensor 2; 26. Manual throttle valve. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0023] See attached Figure 1 As shown, a shock absorber valve hydraulic test system in this embodiment includes an oil supply system 1, a test system 16, and a shock absorber valve body 24. The oil supply system 1 can deliver test oil to the test system 16. The oil supply system 1 automatically supplies oil to the test system 16 to ensure the test efficiency of the shock absorber valve.

[0024] The test system 16 is connected to the oil inlet of the shock absorber valve body 24 via a test oil pipe 18. Specifically, the test oil supplied in the test system 16 is pumped to the shock absorber valve body 24 through the test oil pipe 18. The oil inlet of the shock absorber valve body 24 is opened, and the test oil enters and flows out from the oil outlet thereof, thereby cooperating with the shock absorber valve body 24 to complete its own testing.

[0025] The testing system 16 includes a test pump assembly 17, a flow control assembly 20, and a first pressure measuring assembly, sequentially arranged along a test oil pipe 18. The flow control assembly 20 includes a servo valve 200 and a flow meter 201 forming a closed circuit therewith. A second pressure measuring assembly is provided at the oil outlet of the shock absorber valve body 24. The flow control assembly 20, the test pump assembly 17, the first pressure measuring assembly, and the second pressure measuring assembly in the testing system 16 cooperate with each other. The servo valve 200 provides different currents to output corresponding modulated flow rates to the shock absorber valve body 24. The first and second pressure measuring assemblies can measure the pressure before and after the corresponding flow rate of test oil passing through the shock absorber valve body 24, thereby automatically generating a curve between the pressure and flow before and after, effectively improving the efficiency of testing various performance indicators of the shock absorber valve.

[0026] In some embodiments, the flow meter 201 is disposed between the servo valve 200 and the first pressure measuring assembly. The servo valve 200 can provide different currents to output corresponding modulated flow rates to the shock absorber valve body 24. The flow meter 201 is configured to monitor and record the flow rate of the test oil input into the shock absorber valve body 24 in real time. The first pressure measuring assembly records the pressure corresponding to the flow rate entering the shock absorber valve body 24 and automatically generates an initial flow / pressure curve.

[0027] After the test oil flows out of the shock absorber valve body 24, it passes through the pressure measuring component 2 at its valve port. The pressure measuring component 2 can record the pressure of the test oil after it flows out of the valve body and automatically generate a flow / pressure curve after detection. By comparing the above two flow / pressure curves, it can be determined whether the various indicators of the shock absorber valve meet the test standards.

[0028] The oil supply system 1 includes a dirty oil tank 2 and a clean oil tank 3 connected by an oil inlet pipe 9. A circulating pump assembly 8, a one-way valve 10, an oil temperature controller 14, and a high-pressure filter 15 are sequentially arranged along the length of the oil inlet pipe 9. A protective oil pipe 11, connected to the dirty oil tank 2, is located between the circulating pump assembly 8 and the one-way valve 10. This protective oil pipe 11 is equipped with a manual relief valve 13 and a pressure switch 12. The test oil in the dirty oil tank 2 is regulated in temperature and cleanliness by the oil temperature controller 14 and the high-pressure filter 15, respectively, so that the test oil entering the clean oil tank 3 meets the testing requirements of the subsequent testing system 16. The protective oil pipe 11 limits the maximum pressure of the oil supply system 1, thus protecting the entire system.

[0029] In some embodiments, one end of the test oil pipe 18 is connected to the oil inlet of the shock absorber valve body 24, and the other end is located in the clean oil tank 3. When the test system 16 is testing, the test oil in the clean oil tank 3 is sucked into the shock absorber valve body 24 through the above-mentioned test oil pipe 18.

[0030] During oil supply, the oil inlet pipe 9 draws the test oil in the dirty oil tank 2 into the clean oil tank 3 under the action of the circulation pump group 8. During the suction process, the oil temperature machine 14 can increase or decrease the temperature of the sucked test oil, and the high-pressure filter 15 can filter the test oil, so that the temperature and cleanliness of the test oil entering the clean oil tank 3 meet the use requirements of the test system 16.

[0031] It should be noted that the shock absorber valve body 24 has very high requirements on the temperature and cleanliness of the test oil during the test process. Therefore, the provision of the oil temperature machine 14 and the high-pressure filter 15 can well meet the test requirements.

[0032] Pressure measuring assembly 1 includes pressure sensor 1 231 and temperature sensor 232, while pressure measuring assembly 2 includes pressure sensor 251. Pressure sensor 1 231 and pressure sensor 251 respectively monitor the pressure of the test oil before and after it passes through the shock absorber valve, thereby subsequently generating a test curve corresponding to the flow rate. Temperature sensor 232 monitors the temperature of the medium entering the shock absorber valve body 24 to ensure that the medium meets test requirements.

[0033] The test oil pipe 18 is sequentially provided with a one-way valve 10, a manual relief valve 13, a proportional relief valve 19, a high-pressure filter 15, a solenoid ball valve 22, and a pressure compensator 21, located between the test pump assembly 17 and the flow control assembly 20. The one-way valve 10 ensures that the oil in the clean oil tank 3 does not flow back into the shock absorber valve body 24 after being input thereto, thus preventing the used test oil from mixing with the clean oil. The high-pressure filter 15 is provided to further filter the test oil input into the test system 16, preventing any test oil entering the test system 16 from having poor cleanliness. The solenoid ball valve 22 is provided to control the oil from the oil supply system 1 entering the test system 16. The pressure compensator 21 is used to stabilize the pressure and flow at the inlet and outlet of the servo valve 200.

[0034] The oil outlet of the shock absorber valve body 24 forms a channel for the return of the used test oil through the return pipe and the dirty oil tank 2. This realizes the recycling of the test oil and effectively reduces the testing cost of the enterprise.

[0035] It should be noted that a one-way valve 10 is also provided on the return pipe.

[0036] The two one-way valves 10 in the present application are both used to prevent the high-pressure test oil from flowing back into the output pump, that is, to protect the test pump and the circulation pump.

[0037] Both the dirty oil tank 2 and the clean oil tank 3 are equipped with a visual level gauge 7 and an oil drain port 4 on their sides. Air filters 5 and liquid level and temperature sensors 6 are installed inside each tank. The air filters 5 effectively remove or reduce solid particles, microorganisms, or other harmful substances in the air inside the dirty oil tank 2 and the clean oil tank 3, ensuring the cleanliness of the test oil. The liquid level and temperature sensors 6 monitor the temperature of the test oil entering the oil inlet pipe 9 and provide feedback to the oil temperature controller 14, which then adjusts the test oil temperature to meet test requirements.

[0038] Specifically, the oil drain port 4 is located at the bottom of the sides of the clean oil tank 3 and the dirty oil tank 2 .

[0039] The test pump group 17 is a variable frequency pump group. During the test process, the flow rate of the shock absorber valve body 24 changes from small to large, and the variable frequency pump group can well achieve accurate control of its flow rate.

[0040] In addition, the above-mentioned test system 16 is a high-pressure system. If a quantitative pump group is selected, the system will generate a lot of heat during operation and consume more electricity, which will increase the company's production costs. Replacing it with a variable frequency pump group can greatly reduce the heat generated during the test, thereby saving electricity and effectively reducing the company's production testing costs.

[0041] The oil outlet of the shock absorber valve body 24 is also provided with a manual throttle valve 26. The setting of the manual throttle valve 26 can be used to adjust the back pressure of the shock absorber valve body 24 outlet.

[0042] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A shock absorber valve hydraulic test system, characterized by: It includes an oil supply system, a test system and a shock absorber valve body; the oil supply system can transport test oil to the test system, the test system is connected to the oil inlet of the shock absorber valve body through a test oil pipe, the test system includes a test pump group, a flow control component and a pressure measuring component 1 arranged in sequence along the test oil pipe, the flow control component includes a servo valve and a flow meter forming a closed loop with the servo valve, and the oil outlet of the shock absorber valve body is provided with a pressure measuring component 2.

2. A shock absorber valve hydraulic test system according to claim 1, characterized in that: The oil supply system includes a dirty oil tank and a clean oil tank connected by an oil inlet pipe. A circulation pump group, a one-way valve, an oil temperature controller and a high-pressure filter are sequentially arranged on the oil inlet pipe along its length. A protective oil pipe connected to the dirty oil tank is arranged on the oil inlet pipe between the circulation pump group and the one-way valve. A manual overflow valve and a pressure switch are provided on the protective oil pipe.

3. The shock absorber valve hydraulic test system according to claim 1, characterized in that: The pressure measuring component 1 includes a pressure sensor 1 and a temperature sensor, and the pressure measuring component 2 includes a pressure sensor 2.

4. The shock absorber valve hydraulic test system according to claim 1, characterized in that: A one-way valve, a manual relief valve, a proportional relief valve, a high-pressure filter, an electromagnetic ball valve and a pressure compensator are sequentially arranged on the test oil pipe between the test pump group and the flow control component.

5. The shock absorber valve hydraulic test system according to claim 1, characterized in that: The oil outlet of the shock absorber valve body forms a channel for returning the used test oil through the return pipe and the dirty oil tank.

6. The shock absorber valve hydraulic test system according to claim 2, characterized in that: A visual liquid level gauge and an oil drain port are provided on the sides of the dirty oil tank and the clean oil tank, and an air filter and a liquid level and temperature sensor are provided inside the dirty oil tank and the clean oil tank.

7. The shock absorber valve hydraulic test system according to claim 1, characterized in that: The test pump group is a variable frequency pump group.

8. The shock absorber valve hydraulic test system according to claim 1, characterized in that: The oil outlet of the shock absorber valve body is also provided with a manual throttle valve.

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