Shift valve assembly performance test device

Abstract

The invention provides a gear shifting valve assembly performance testing device which comprises a workbench, a testing tool, a flow sensor, a pressure sensor, a controller, a control panel, a normally-closed solenoid valve, a rubber pipe and an adapter, and can test the pressure index, the gear index and the buffer characteristic of a gear shifting valve assembly, and the performance of the gear shifting valve assembly can be tested by adjusting the number of adjusting gaskets of the gear shifting valve assembly. And the performance index of the gear shifting valve assembly meets the design requirement. The gear shifting valve assembly performance test device abandons a conventional scheme that a hydraulic pump is arranged in a hydraulic valve assembly performance test, does not provide hydraulic oil, is simple in structure and low in cost, has mobility, can visually display whether a test result meets design requirements or not, and is convenient to use. Operators can conveniently carry out related tests.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic valve performance testing technology, specifically relating to a performance testing device for a shift valve assembly. Background Technology

[0002] Currently, hydraulic valves typically use integrated test benches to conduct performance tests on valve body assemblies. The test equipment has a complex structure and high manufacturing cost. The built-in hydraulic station occupies a large area and cannot be moved, resulting in high testing costs and complex operation, which is not conducive to conducting tests. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] This invention proposes a performance testing device for a shift valve assembly to solve the technical problem of how to conveniently, quickly and cost-effectively complete the performance testing of the shift valve assembly.

[0005] (II) Technical Solution

[0006] To address the aforementioned technical problems, this invention proposes a performance testing device for a shift valve assembly. This device includes a workbench, testing fixtures, a flow sensor, a pressure sensor, a controller, a control panel, a normally closed solenoid valve, a hose, and an adapter.

[0007] The workbench is used to place the test fixture and the shift valve assembly to be tested; the test fixture is connected to the shift valve assembly and serves as the base plate of the shift valve assembly, so that the corresponding oil circuit is complete during shifting, realizing the shifting operation, and an oil inlet and outlet for testing are added on the side.

[0008] A set of flow sensors and a set of pressure sensors are fixed on each side of the workbench. The two sets of flow sensors and pressure sensors are connected to the oil inlet and oil outlet of the shift valve assembly through hoses and adapters, respectively. They are used to detect the hydraulic oil flow and pressure at the oil inlet and oil outlet of the shift valve assembly in real time and transmit the detection data to the controller. A normally closed solenoid valve is installed in front of the flow sensor and pressure sensor on the oil inlet side to control the hydraulic oil.

[0009] The workbench is equipped with a controller and a control panel. The control panel consists of push-button switches, indicator lights, and digital displays. The controller is connected to the flow sensor, pressure sensor, normally closed solenoid valve, and control panel via signal lines. Multiple solenoid valves on the shift valve assembly are connected to the controller via signal lines. The controller is used to control the normally closed solenoid valve, receive the flow sensor and pressure sensor according to the control commands input through the control panel, receive the detection data from the flow sensor and pressure sensor, and adjust multiple gears through the gear switch according to the performance test requirements of the shift valve assembly, while monitoring pressure and flow values.

[0010] Furthermore, the workbench has two layers. The bottom platform holds an oil drum to receive the hydraulic oil flowing out of the oil outlet of the shift valve assembly during the test. The upper platform is used to place the test fixtures and the shift valve assembly to be tested.

[0011] Furthermore, the front of the test fixture is provided with multiple threaded holes, which are fixed to the through holes on the shift valve assembly using fastening bolts to ensure the airtightness of the shift valve during testing.

[0012] Furthermore, the controller is developed based on the domestically produced STC microcontroller.

[0013] Furthermore, the pressure sensor on the oil outlet side is connected to two buffer measuring points on the shift valve assembly.

[0014] (III) Beneficial Effects

[0015] This invention proposes a performance testing device for a shift valve assembly, comprising a workbench, testing fixtures, a flow sensor, a pressure sensor, a controller, a control panel, a normally closed solenoid valve, hoses, and adapters. It can test the pressure, gear position, and buffer characteristics of the shift valve assembly. By adjusting the number of adjusting shims in the shift valve assembly, the performance indicators of the shift valve assembly can be made to meet design requirements. This invention eliminates the need for a hydraulic pump in hydraulic valve assembly performance testing, resulting in a simpler structure, reduced cost, portability, and a clear display of test results to determine if they meet design requirements, facilitating operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the shift valve assembly performance testing device of the present invention;

[0017] Figure 2 This is a schematic diagram of the workbench structure in this invention;

[0018] Figure 3 This is a top view of the test fixture in this invention;

[0019] Figure 4 This is a schematic diagram of the control panel in this invention; Detailed Implementation

[0020] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0021] This embodiment proposes a performance testing device for a shift valve assembly, the overall structure of which is as follows: Figure 1As shown, it mainly includes a workbench 1, a test fixture 2, a flow sensor 3, a pressure sensor 4, a controller 5, a control panel 6, a normally closed solenoid valve 7, a hose 8, and an adapter 9.

[0022] like Figure 2 As shown, the workbench 1 has two layers. The bottom platform can hold an oil drum to receive the hydraulic oil flowing out of the oil outlet of the shift valve assembly during the test. The middle part of the upper platform is used to place the test fixture 2 and the shift valve assembly to be tested. The test fixture 2 is connected to the shift valve assembly by fastening bolts.

[0023] Test fixture 2 is a mechanical structure that serves as the base plate for the shift valve assembly, ensuring the integrity of the corresponding oil circuit during shifting and enabling the shifting operation. Its structure is similar to the corresponding component of the shift valve assembly, the shift valve base plate assembly, and it adds an oil inlet and outlet port on the side for testing purposes, facilitating the testing of the shift valve assembly. Figure 3 As shown, the front of the test fixture 2 is provided with multiple threaded holes, which can be fixed to the through holes on the shift valve assembly using fastening bolts to ensure the airtightness of the shift valve during testing.

[0024] A set of flow sensors 3 and a set of pressure sensors 4 are fixed on each side of the upper platform. These two sets of flow sensors 3 and pressure sensors 4 are connected to the inlet and outlet of the shift valve assembly via hoses 8, respectively, to monitor the hydraulic oil flow and pressure at the inlet and outlet of the shift valve assembly in real time, and simultaneously transmit the data to the controller 5. Normally closed solenoid valves 7 are installed at the front end of the flow sensors 3 and pressure sensors 4 on the inlet side for controlling the hydraulic oil. The pressure sensor 4 on the outlet side is also connected to two buffer measuring points on the shift valve assembly to measure whether its buffering characteristics meet the requirements.

[0025] The upper platform surface of workbench 1 extends upwards and inwards along a slope for mounting controller 5 and control panel 6. Control panel 6 consists of push-button switches, indicator lights, and a 4-digit 8-segment display, etc. Figure 4 As shown. The controller 5 and control panel 6 are connected and assembled, then installed on the upper inclined surface of the workbench 1. The controller 5 is connected to the flow sensor 3, pressure sensor 4, normally closed solenoid valve 7, and control panel 6 via signal lines. Multiple solenoid valves on the shift valve assembly are connected to the controller 5 via signal lines. The controller 5 controls the normally closed solenoid valve 7, receives the flow sensor 3 and pressure sensor 4 according to control commands input via the buttons on the control panel 6, receives the detection data from the flow sensor 3 and pressure sensor 4, and, according to the performance test requirements of the shift valve assembly, adjusts to eight gear positions via a gear switch, monitoring pressure and flow values ​​at specific locations to ensure the testing of relevant indicators and characteristics. The controller 5 is developed based on a domestically produced STC microcontroller, and a control program is written for testing the pressure, gear position, and buffer characteristics of the shift valve assembly.

[0026] During the test, the test fixture 2 is installed on the shift valve assembly to be tested and tightened with bolts. Simultaneously, the signal lines of the seven solenoid valves on the shift valve assembly and the two sets of flow sensors 3 and pressure sensors 4 of the shift valve assembly performance test device are connected to the controller 5. Next, the output hose of the hydraulic pump station is connected to the normally closed solenoid valve 7 via an adapter. The two sets of flow sensors 3 and pressure sensors 4 are connected to the oil inlet and outlet of the shift valve assembly via hoses 8 and adapters 9, respectively, according to the test requirements. Finally, control commands are input through the buttons on the control panel 6. By pressing the pressure characteristic test switch, gear characteristic test switch, and buffer characteristic test switch, the controller 5 completes the testing of the shift valve assembly's performance indicators, including pressure indicators, gear indicators, and buffer characteristics. Specific test values ​​are displayed, and the status indicator lights (green and red) indicate whether the test results meet the design requirements. If the pressure, gear position, and buffering characteristics of the shift valve assembly do not meet the design requirements, adjust the number of adjusting shims on the valve body to ensure that the performance indicators of the valve body after testing meet the design requirements. When conducting the buffering characteristic test, connect the pressure sensor 4 on the oil outlet side of the shift valve assembly to the two buffering measuring points of the shift valve assembly in sequence, record the buffering start pressure, end pressure, and buffering time, and adjust the number of shims to ensure that it meets the design requirements.

[0027] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A performance testing device for a shift valve assembly, characterized in that, The performance testing device for the shift valve assembly includes a workbench, testing fixtures, a flow sensor, a pressure sensor, a controller, a control panel, a normally closed solenoid valve, a hose, and an adapter; wherein, The workbench is used to place the test fixture and the shift valve assembly to be tested; the test fixture is connected to the shift valve assembly and serves as the base plate of the shift valve assembly, so that the corresponding oil circuit is complete during shifting, realizing the shifting operation, and an oil inlet and outlet for testing are added on the side. A set of flow sensors and a set of pressure sensors are fixed on each side of the workbench. The two sets of flow sensors and pressure sensors are connected to the oil inlet and oil outlet of the shift valve assembly through hoses and adapters, respectively. They are used to detect the hydraulic oil flow and pressure at the oil inlet and oil outlet of the shift valve assembly in real time and transmit the detection data to the controller. A normally closed solenoid valve is installed in front of the flow sensor and pressure sensor on the oil inlet side to control the hydraulic oil. The workbench is equipped with a controller and a control panel. The control panel consists of push-button switches, indicator lights, and digital displays. The controller is connected to the flow sensor, pressure sensor, normally closed solenoid valve, and control panel via signal lines. Multiple solenoid valves on the shift valve assembly are connected to the controller via signal lines. The controller is used to control the normally closed solenoid valve, receive the flow sensor and pressure sensor according to the control commands input through the control panel, receive the detection data from the flow sensor and pressure sensor, and adjust multiple gears through the gear switch according to the performance test requirements of the shift valve assembly, while monitoring pressure and flow values.

2. The performance testing device for the shift valve assembly as described in claim 1, characterized in that, The workbench has two layers. The bottom platform holds an oil drum to receive the hydraulic oil flowing out of the oil outlet of the shift valve assembly during the test. The upper platform is used to place the test fixtures and the shift valve assembly to be tested.

3. The performance testing device for the shift valve assembly as described in claim 1, characterized in that, The test fixture has multiple threaded holes on its front side, which are fixed to the through holes on the shift valve assembly using fastening bolts to ensure the airtightness of the shift valve during testing.

4. The performance testing device for the shift valve assembly as described in claim 1, characterized in that, The controller is developed based on the domestically produced STC microcontroller.

5. The performance testing device for the shift valve assembly as described in claim 1, characterized in that, The pressure sensor on the oil outlet side is connected to two buffer measuring points on the shift valve assembly.

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