Test platform for reducing system back pressure during high-speed test of gearbox pump

Abstract

The utility model discloses a test platform for reducing system backpressure during high-speed test of a gearbox pump. The test platform comprises a main loop system. The main loop comprises a first hydraulic set, a servo valve set and a flow dividing control module, and the first hydraulic set serves as a hydraulic power source and a preliminary pressure control part of the test platform and is formed by sequentially connecting a pump, an overflow valve, a filter element and a flow component. The pump provides required hydraulic energy for the whole test platform, the overflow valve follows the pump and adjusts and limits the maximum pressure of the system, the filter element filters hydraulic oil, impurities and pollutants are removed, oil is kept clean, system abrasion is reduced, the service life of a hydraulic element is prolonged, and test accuracy is ensured. And the flow part controls and adjusts the flow of the hydraulic oil according to test requirements. The servo valve group is arranged at the liquid outlet end of the filter element and comprises two servo valves which are connected in parallel, and an oil path of one servo valve is connected with an electromagnetic valve in parallel.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, specifically a test platform for reducing system back pressure during high-speed testing of a gearbox pump. Background Technology

[0002] Under high-speed testing conditions, the system back pressure of the transmission pump has a significant impact on the pump's performance, efficiency, and the overall operational stability of the transmission. However, existing transmission pump testing platforms often face the problem of excessively high system back pressure during high-speed testing, which not only affects the accuracy of the test but may also damage the testing equipment and increase maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide a test platform for reducing system back pressure during high-speed testing of the gearbox pump, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A test platform for reducing system back pressure during high-speed testing of a transmission pump includes a main circuit system, which comprises:

[0006] The first hydraulic assembly includes a pump, a relief valve, a filter element, and a flow meter connected in sequence.

[0007] The servo valve group is located at the outlet end of the filter element and includes two servo valves arranged in parallel. The first hydraulic group has a solenoid valve connected in parallel to the oil circuit. When the servo valve is not working, the hydraulic circuit passes through this first hydraulic group oil circuit.

[0008] The diversion control module includes a diversion meter and a flow meter arranged in series. The output of the diversion control module is connected to the output of the servo valve group, and the output is connected to the oil tank.

[0009] Preferably, the flow ratio of the two parallel servo valves is 1:1.2 to 1:1.8, wherein the two servo valves of the series solenoid valve are identical.

[0010] Preferably, the shunt meter is a dynamically adjustable shunt, and its shunt ratio is controlled within the range of 1:1 to 1:3 by an electric actuator, and a pressure compensation diaphragm is provided at the inlet end of the shunt meter.

[0011] Preferably, the flow meter is a bidirectional digital flow meter with a flow range of 0-100 L / min and an operating temperature range of -20℃ to 80℃.

[0012] Preferably, the solenoid valve is a two-position three-way high-frequency response solenoid valve with a response time ≤15ms.

[0013] Preferably, the relief valve is a cartridge-type proportional relief valve, whose pressure setpoint is dynamically related to the pump speed, satisfying the following relationship: P set =5+0.003×(n−2000) bar(2000≤n≤7000 rpm), where P set Set the pressure for the relief valve, where n is the real-time pump speed.

[0014] Preferably, it also includes a backup circuit system, which includes a second hydraulic group and a second servo valve group. The input end of the second servo valve group is arranged at the output end of the second hydraulic group, and the output end of the second servo valve group is connected to the input end of the flow control module.

[0015] The second hydraulic assembly and the second servo valve assembly have the same structure as the first hydraulic assembly and the servo valve assembly.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses a test platform for reducing system back pressure during high-speed testing of a gearbox pump, comprising a main circuit system. The main circuit includes a first hydraulic assembly, a servo valve assembly, and a flow control module. The first hydraulic assembly, serving as the hydraulic power source and initial pressure control component of the test platform, consists of a pump, a relief valve, a filter element, and a flow control component connected in sequence. The pump provides the necessary hydraulic energy to the entire test platform. The relief valve, following the pump, regulates and limits the system's maximum pressure. The filter element filters the hydraulic oil, removing impurities and contaminants, maintaining oil cleanliness, reducing system wear, extending the lifespan of hydraulic components, and ensuring test accuracy. The flow control component controls and regulates the hydraulic oil flow rate according to test requirements. The servo valve assembly, located at the filter element's outlet, includes two parallel servo valves. These servo valves can precisely control the hydraulic oil flow rate and pressure based on input signals. The two parallel servo valves broaden the flow range and can precisely control system back pressure by adjusting the opening degree. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the simulation test platform structure in one embodiment.

[0019] Figure 2 Test curves for the existing test platform.

[0020] Figure 3 This is a test curve diagram of the test platform in one embodiment. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] The embodiments of this patent are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0023] In the description of this patent, it should be understood that the terms "middle", "bottom", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0024] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection or installation, a detachable connection or installation, or an integral connection or installation. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0025] Please refer to Figure 1 One embodiment discloses a test platform for reducing system back pressure during high-speed testing of a transmission pump, comprising a main circuit system, the main circuit system including:

[0026] The first hydraulic assembly includes a pump 1, an overflow valve 2, a filter element 3, and a flow component 4 connected in sequence.

[0027] Servo valve group, the servo valve group is arranged at the liquid outlet end of the filter element 3, including two servo valves 6 arranged in parallel, and a solenoid valve is connected in parallel to the first hydraulic group oil circuit. When the servo valve is not working, the hydraulic circuit passes through this first hydraulic group oil circuit.

[0028] The diversion control module includes a diversion meter and a flow meter arranged in series. The output end of the diversion control module is connected to the output end of the servo valve group and the output end is connected to the oil tank 7.

[0029] Specifically, the first hydraulic assembly serves as the hydraulic power source and preliminary pressure control section of the test platform. It consists of pump 1, relief valve 2, filter element 3, and flow control component 4. Pump 1 is the power source for the hydraulic system, providing the necessary hydraulic energy to the entire test platform. Relief valve 2, located after pump 1, is used to regulate and limit the system's maximum pressure. Filter element 3 filters impurities and contaminants from the hydraulic oil, maintaining its cleanliness. Clean hydraulic oil helps reduce system wear, extends the lifespan of hydraulic components, and improves test accuracy. Flow control component 4 controls and regulates the hydraulic oil flow rate, adjusting it according to test requirements to meet different test conditions. The servo valve assembly, located at the outlet of filter element 3, consists of two parallel servo valves 6. A solenoid valve is connected in parallel to the first hydraulic assembly's oil circuit. When the servo valves are not operating, the hydraulic circuit passes through this first hydraulic assembly's oil circuit. The servo valves 6 precisely control the hydraulic oil flow and pressure based on input signals. Two parallel servo valves 6 can provide a wider flow range, and their opening degree can be adjusted to precisely control the system back pressure. Solenoid valves 5 are connected in parallel in the branch oil circuit. By controlling the on and off of solenoid valves 5, the flow of servo valves 6 can be quickly adjusted, thereby controlling the system back pressure. The flow control module consists of a flow meter and a flow meter arranged in series. The output end is connected to the output end of the servo valve group and finally connected to the oil tank 7. The flow meter is a device that controls the flow ratio of hydraulic oil. The test platform can flexibly adjust the flow ratio of hydraulic oil according to the test requirements, thereby effectively controlling the system back pressure. In one embodiment, the inlet end of the flow meter is also equipped with a pressure compensation diaphragm to compensate for pressure fluctuations caused by flow division and maintain the stability of system pressure. The flow meter range covers 0-100L / min, and the working temperature range is -20℃ to 80℃. It can accurately reflect the flow changes of hydraulic oil and provide reliable data support for testing.

[0030] Furthermore, the flow ratio of the two parallel servo valves 6 is 1:1.2 to 1:1.8, with a maximum pressure of 315 bar.

[0031] Furthermore, the shunt meter is a dynamically adjustable shunt, and its shunt ratio is controlled within the range of 1:1 to 1:3 by an electric actuator, and the inlet end of the shunt meter is provided with a pressure compensation diaphragm.

[0032] Furthermore, the flow meter is a bidirectional digital flow meter with a flow range of 0-100 L / min and an operating temperature range of -20℃ to 80℃.

[0033] Furthermore, the solenoid valve (5) is a two-position three-way high-frequency response solenoid valve with a response time ≤15ms.

[0034] Furthermore, the relief valve (2) is a cartridge-type proportional relief valve, whose pressure setpoint is dynamically related to the pump speed, satisfying the following relationship: P set=5+0.003×(n−2000) bar(2000≤n≤7000 rpm), where, P set Set the pressure for the relief valve, where n is the real-time pump speed.

[0035] Please continue to refer to this. Figure 1 In one embodiment, the test platform further includes a backup circuit system, which includes a second hydraulic group and a second servo valve group. The input end of the second servo valve group is arranged at the output end of the second hydraulic group, and the output end of the second servo valve group is connected to the input end of the flow control module.

[0036] The second hydraulic assembly and the second servo valve assembly have the same structure as the first hydraulic assembly and the servo valve assembly.

[0037] For operational simulation of the above-mentioned test platform, please refer to [reference needed]. Figure 2 , Figure 2 This is a test curve graph for a traditional testing platform. Figure 3 for Figure 1 Test curves of the testing platform. Figure 2 When the rotational speed exceeds 2000 rpm, the system pressure exceeds 7 bar, which does not meet the requirements; for Figure 3 When the test bench was used, the system pressure met the requirements when the speed was below 6100 rpm.

[0038] In summary, this utility model discloses a test platform for reducing system back pressure during high-speed testing of a gearbox pump, comprising a main circuit system. The main circuit includes a first hydraulic assembly, a servo valve assembly, and a flow control module. The first hydraulic assembly, serving as the hydraulic power source and initial pressure control component of the test platform, consists of a pump 1, an overflow valve 2, a filter element 3, and a flow component 4 connected sequentially. The pump 1 provides the necessary hydraulic energy to the entire test platform. The overflow valve 2 follows the pump 1, regulating and limiting the system's maximum pressure. The filter element 3 filters the hydraulic oil, removing impurities and contaminants, maintaining oil cleanliness, reducing system wear, extending the lifespan of hydraulic components, and ensuring test accuracy. The flow component 4 controls and regulates the hydraulic oil flow rate according to test requirements. The servo valve assembly is located at the outlet of the filter element 3 and includes two parallel servo valves 6, with a solenoid valve 5 connected in parallel to the branch oil circuit. The servo valves 6 can precisely control the hydraulic oil flow rate and pressure based on input signals. The two parallel servo valves 6 broaden the flow range and can precisely control system back pressure by adjusting the opening degree. Solenoid valve 5 can quickly regulate the flow of servo valve 6 connected in series by switching it on and off.

[0039] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these should also be considered within the scope of protection of this utility model. These will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. A test platform to reduce system back pressure during high speed testing of a transmission pump, the test platform comprising: The main circuit system comprises: A first hydraulic group comprising a pump (1), an overflow valve (2), a filter element (3) and a flow component (4) connected in sequence; A servo valve group arranged at the outlet end of the filter element (3) and comprising two servo valves (6) arranged in parallel, the oil circuit of the first hydraulic group being provided with a solenoid valve (5) in parallel; A shunt control module comprising a shunt meter and a flow meter arranged in series, the output end of the shunt control module being connected to the output end of the servo valve group, and the output end being connected to an oil tank (7).

2. The test platform of claim 1, wherein, The flow ratio of the two parallel servo valves (6) is 1:1.2-1:1.8, the maximum flow of the servo valve (6) is 63L / min, and the maximum pressure is 315bar.

3. The test platform of claim 1, wherein, The shunt meter is a dynamic adjustable shunt meter, the shunt ratio of which is controlled by an electric actuator to be within the range of 1:1 to 1:3, and the inlet end of the shunt meter is provided with a pressure compensation diaphragm.

4. The test platform of claim 1, wherein, The flow meter is a bidirectional digital flow meter, the measurement range of which covers 0-100L / min, and the working temperature range is-20℃-80℃.

5. The test platform of claim 2, wherein, The solenoid valve (5) is a two-position three-way high-frequency response solenoid valve, and the response time is ≤15ms.

6. The test platform of claim 1, wherein, The overflow valve (2) is a cartridge type proportional overflow valve, whose pressure setting value is dynamically associated with the pump rotating speed, satisfying the following relation: P set = 5 + 0.003 x (n-2000) bar (2000≤n≤7000 rpm), wherein P set is the set pressure of the overflow valve, and n is the real-time rotating speed of the pump.

7. The test platform of claim 1, wherein, Further comprising a standby circuit system, the standby circuit system comprising a second hydraulic group and a second servo valve group, the input end of the second servo valve group being arranged at the output end of the second hydraulic group, and the output end of the second servo valve group being connected to the input end of the shunt control module; Wherein, the structure of the second hydraulic group and the second servo valve group is the same as that of the first hydraulic group and the servo valve group.

Images