Comprehensive oil pump, valve block test bed and test method

Abstract

The invention discloses a comprehensive oil pump and valve block test bed and a test method, and solves the problems that the production cost is increased due to the fact that different test stands are used for testing the performance of a mechanical oil pump, an electronic oil pump and a valve block in the prior art, and an existing test stand integrating oil pump and function valve performance testing is complex in structure and inconvenient to operate. A main motor or a direct-current power supply is adopted to drive an oil pump to be tested, so that the same test bench can be used for testing both a mechanical oil pump and an electronic oil pump. And the to-be-tested valve block is connected in parallel at the outlet of the to-be-tested oil pump, so that the performance of different valve blocks can be tested, and multi-functionalization and comprehensive performance of the oil pump test bed are realized. The clean oil tank and the dirty oil tank are independently arranged, so that test oil cannot be mixed before and after being used, when the test oil in the dirty oil tank flows back to the clean oil tank, the oil cleanliness is high through the coarse filter and the fine filter, and the problem that test data are abnormal due to the fact that the to-be-tested oil pump is blocked by impurities of the test oil is effectively solved.

Description

Technical Field

[0001] The invention relates to an oil pump test bench, in particular to a comprehensive oil pump and valve block test bench and a test method. Background Art

[0002] After the oil pump and functional valve block are manufactured, their performance needs to be tested to determine if they meet the standards. Existing performance testing of oil pumps and valve blocks is performed separately on different equipment, such as mechanical oil pump test benches, electronic oil pump test benches, and specific testing equipment for different functional valve blocks. This results in poor equipment integration and increased production costs.

[0003] Chinese invention patent CN112729810B discloses a test assembly, test method and test system for a transmission oil pump and functional valve, integrating transmission oil pump performance testing and functional valve performance testing. Calibrated oil circuits are used to match pipe diameters suitable for different transmission oil pumps, maximally simulating the actual flow resistance of the transmission oil pump after installation in the transmission, thereby improving the accuracy of transmission testing. At the same time, dynamic oil pressure test circuits and static oil pressure test circuits are used to simulate the different flow rates and pressures corresponding to the various functional valves on the transmission oil pump when the transmission oil pump shifts, thereby matching the transmission flow and pressure, meeting customer needs for various types of transmissions, and achieving true simulation testing of each functional valve on the oil pump, thereby improving test accuracy.

[0004] While the aforementioned patent integrates oil pump and valve performance testing, the simultaneous testing of both the pump and valve results in a complex structure and testing process. Any abnormal fluctuation in any step or component could potentially affect the overall test results. Consequently, the requirements for operator skill, equipment accuracy, and related parameter control are high, making measurement accuracy difficult to control. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems in the prior art of using different test benches to test oil pumps and valve blocks, which increases production costs, and the test bench that integrates oil pump performance testing and functional valve performance testing has a complex structure and requires high skills of the operator, and to provide a comprehensive oil pump and valve block test bench and test method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A comprehensive oil pump and valve block test bench, which is special in that it includes a clean oil tank and a dirty oil tank, between which the main valve of the secondary proportional reversing valve and the flow meter are connected in sequence through pipelines to form an oil pump test pipeline;

[0008] An oil pump mounting position for mounting the oil pump to be tested is provided on the pipeline between the main valve and the clean oil tank, a negative pressure sensor is provided on the pipeline between the oil pump mounting position and the clean oil tank, a positive pressure sensor is provided on the pipeline between the oil pump mounting position and the main valve, a main motor and a DC power supply are provided on the periphery of the oil pump mounting position, an oil inlet and an oil outlet of the oil pump to be tested are respectively connected to the front end and rear end interfaces of the oil pump mounting position, and the oil pump to be tested is driven by the main motor or by the DC power supply;

[0009] The oil inlet and oil outlet of the main valve are connected to the oil pump test pipeline, and the pilot valve oil supply device provides pressurized oil to the pilot valve of the secondary proportional reversing valve, and controls the opening of the main valve through the pilot valve, thereby controlling the oil pressure of the oil pump test pipeline;

[0010] A valve block test pipeline is connected to the pipeline between the flow meter and the dirty oil tank via a first three-way ball valve. A valve block installation position for installing a valve block to be tested is provided on the valve block test pipeline. The inlet end of the valve block to be tested is connected to the first three-way ball valve, and the outlet of the valve block to be tested is connected to the dirty oil tank.

[0011] The clean oil tank contains test oil, and the test oil is heated or cooled by a temperature control device.

[0012] Furthermore, the flowmeter includes a low-temperature turbine flowmeter and a high-temperature gear flowmeter arranged in parallel, one end of each of which is connected to the oil outlet of the main valve through a second three-way ball valve, and the other end of each of which is connected to the first three-way ball valve through another second three-way ball valve.

[0013] Furthermore, the pilot valve oil supply device includes a pilot pump, the oil inlet of the pilot pump is connected to the pilot pump oil tank, the oil outlet of the pilot pump is connected to the oil inlet of the pilot valve through a one-way valve, and the oil outlet of the pilot valve is connected to the pilot pump oil tank to form a pilot valve oil supply circuit. A second safety valve is connected between the pilot pump and the one-way valve, and the oil outlet of the second safety valve is connected to the pilot pump oil tank.

[0014] Furthermore, a coarse filter, an oil pump and a fine filter are sequentially connected between the dirty oil tank and the clean oil tank through pipelines to form a test oil return pipeline.

[0015] Furthermore, the temperature control device includes a mold temperature controller, the oil inlet of the mold temperature controller is connected to the clean oil tank through a mold temperature controller oil pump, and the oil outlet of the mold temperature controller is connected to the clean oil tank through a third filter to heat or cool the test oil in the clean oil tank.

[0016] Furthermore, a second filter and a second pressure sensor are provided between the pilot valve and the one-way valve, the oil inlet of the second filter is connected to the outlet of the one-way valve, the oil outlet of the second filter is connected to the oil inlet of the pilot valve, and an accumulator is connected to the pipeline between the pilot valve and the second filter;

[0017] On the valve block test pipeline, a first safety valve and a first pressure sensor are provided between the valve block mounting position and the first three-way ball valve, the oil outlet of the first safety valve is connected to the dirty oil tank, and the oil inlet of the first safety valve is connected to the first three-way ball valve;

[0018] A third safety valve is provided on the oil pump test pipeline between the oil pump installation position and the main valve, the oil outlet of the third safety valve is connected to the dirty oil tank, and the oil inlet of the third safety valve is connected to the oil pump test pipeline.

[0019] Furthermore, there are two secondary proportional reversing valves, which are arranged in parallel;

[0020] The clean oil tank, dirty oil tank and pilot pump oil tank are all provided with thermometers and liquid level gauges, and the exhaust ports of the three oil tanks are all provided with oil mist separators.

[0021] The present invention also provides a comprehensive oil pump and valve block test method, which uses the above-mentioned comprehensive oil pump and valve block test bench; the special feature of the method is that it includes the following steps:

[0022] Step 1: Obtain the device to be tested and install it;

[0023] When the device to be tested is an oil pump to be tested, and it is a mechanical oil pump, install the mechanical oil pump in the oil pump installation position, connect it to the main motor, and close the valve block test pipeline through the first three-way ball valve;

[0024] When the device to be tested is an oil pump to be tested, and it is an electronic oil pump, the electronic oil pump is installed in the oil pump installation position, connected to a DC power supply, and the valve block test pipeline is closed through the first three-way ball valve;

[0025] When the device to be tested is a valve block to be tested, install an oil supply pump at the oil pump installation position. If the oil supply pump is a mechanical oil pump, connect it to the main motor. If the oil supply pump is an electronic oil pump, connect it to the DC power supply. After the connection is completed, install the valve block to be tested and control the action of the first three-way ball valve to open the valve block test pipeline.

[0026] Step 2: Turn on the temperature control device to heat or cool the test oil in the clean oil tank to the set temperature;

[0027] Step 3: Turn on the flow meter according to the set temperature in step 2;

[0028] Step 4: Observe the pressure value displayed by the positive pressure sensor, and adjust the oil pump test pipeline to the required pressure value through the secondary proportional reversing valve;

[0029] Step 5: Conduct performance tests on the mechanical oil pump, electronic oil pump, or valve block, obtain corresponding test data, and complete the test.

[0030] Furthermore, step three is specifically as follows:

[0031] When the set temperature in step 2 is less than 70°C, turn on the low-temperature turbine flowmeter and turn off the high-temperature gear flowmeter;

[0032] When the set temperature is greater than 70°C, turn on the high-temperature gear flowmeter and turn off the low-temperature turbine flowmeter;

[0033] Step 4 is as follows:

[0034] When the pressure value of the oil pump test pipeline needs to be stabilized within the set range, observe the pressure value displayed by the positive pressure sensor and adjust the valve core current value of the pilot valve to control the opening of the main valve so that the pressure value of the oil pump test pipeline is stabilized within the set range;

[0035] When the pressure value of the oil pump test pipeline needs to change periodically, observe the pressure value displayed by the positive pressure sensor and adjust the valve core current of the pilot valve to change periodically to control the opening of the main valve to change periodically, so that the pressure value of the oil pump test pipeline changes periodically.

[0036] Furthermore, in step 2, the temperature control range of the temperature control device is -40°C to 140°C;

[0037] In step five, when conducting a mechanical oil pump performance test, the performance test includes an oil pump displacement test, an oil pump efficiency test, an oil pump cold pneumatic test, an oil pump high temperature test, and an oil pump fatigue test; when conducting an electronic oil pump performance test, the performance test includes an electronic oil pump drive performance test, an electronic oil pump durability test, an electronic oil pump protection function test, and an electronic oil pump energy efficiency test; when conducting a valve block performance test, the performance test includes a valve block response speed test and a valve block back pressure control accuracy test.

[0038] Compared with the prior art, the comprehensive oil pump and valve block test bench and method provided by the present invention have the following beneficial effects:

[0039] 1. The present invention integrates an oil pump and valve block test bench, and sets two drive systems at the position of the oil pump to be tested. The oil pump to be tested is driven by a main motor or a DC power supply, so that the same oil pump and valve block test bench can test both mechanical oil pumps and electronic oil pumps.

[0040] 2. The present invention integrates an oil pump and valve block test bench, with separate oil tanks for clean and dirty oil. This prevents test oil from mixing. Furthermore, when the test oil in the dirty oil tank is returned to the clean oil tank, it is filtered twice, passing through a coarse filter and a fine filter. This ensures high oil cleanliness and effectively eliminates the problem of test data anomalies caused by impurities in the test oil clogging the oil pump under test. Furthermore, by directing the post-test test oil into the dirty oil tank, it avoids direct flow back into the clean oil tank, which could cause temperature fluctuations in the test oil and lead to inaccurate test data.

[0041] 3. The integrated oil pump and valve block test bench of this invention heats the test oil in the clean oil tank via a mold temperature controller, allowing for a wide range of oil temperature adjustment. Furthermore, when the heated test oil flows back into the clean oil tank, it is filtered before flowing back into the clean oil tank, effectively heating the test oil in the clean tank and maintaining high cleanliness.

[0042] 4. The present invention integrates an oil pump and valve block test bench. Under the premise of a wide oil temperature adjustment range, if a flowmeter is shared for high-temperature and low-temperature tests, measurement accuracy is difficult to control and the flowmeter is easily damaged. The present invention uses a low-temperature turbine flowmeter and a high-temperature gear flowmeter arranged in parallel. The low-temperature turbine flowmeter is used for low-temperature testing, and the high-temperature gear flowmeter is used for high-temperature testing. This improves the measurement accuracy of the flowmeter over a wide temperature adjustment range.

[0043] 5. The integrated oil pump and valve block test bench of the present invention uses negative pressure sensors and positive pressure sensors to monitor the inlet and outlet pressures of the oil pump to be tested, and the test data is more complete.

[0044] 6. The oil pump and valve block test bench of the present invention is connected in parallel to the valve block to be tested at the outlet of the oil pump to be tested, and can also be used to test the performance of different valve blocks, thereby realizing the multifunctionality and comprehensive performance of the oil pump test bench, making greater use of test resources and achieving greater economic benefits.

[0045] 7. The integrated oil pump and valve block test bench of the present invention maintains the pressure stability of the pilot valve oil circuit by providing an accumulator and a second safety valve, thereby preventing the main valve from vibrating due to the pilot valve vibration, and further causing the pressure vibration at the rear end of the oil pump to be tested.

[0046] 8. The present invention integrates the oil pump and valve block test method, the oil pump test pipeline pressure is stable, and the adjustment method is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of an embodiment of a comprehensive oil pump and valve block test bench of the present invention.

[0048] Figure Number:

[0049] 1. Dirty oil tank; 2. Thermometer; 3. Liquid level gauge; 4. Oil pump; 5. Oil pump motor; 6. Coarse filter; 7. Clean oil tank; 8. Negative pressure sensor; 9. Fine filter; 10. Main motor; 11. Oil pump to be tested; 12. Second three-way ball valve; 13. Low-temperature turbine flowmeter; 14. High-temperature gear flowmeter; 15. Second pressure sensor; 16. Secondary proportional reversing valve; 1601. Main valve; 1602. Pilot valve; 17. First safety valve. 18. First filter; 19. Mold temperature controller; 20. DC power supply; 21. Pilot pump oil tank; 22. Accumulator; 23. Pilot pump; 24. Pilot pump drive motor; 25. Second safety valve; 26. One-way valve; 27. Second filter; 28. Third safety valve; 29. ​​Oil mist separator; 30. Valve block to be tested; 31. Positive pressure sensor; 32. First three-way ball valve; 33. First pressure sensor; 34. Mold temperature controller oil pump; 35. Third filter. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] like Figure 1As shown, the present invention designs a comprehensive oil pump and valve block test bench to enable simultaneous performance testing of mechanical oil pumps, electronic oil pumps, and valve blocks on a single test bench. The bench includes a clean oil tank 7 and a dirty oil tank 1. Separately arranging the oil tanks prevents mixing of test oils. Directing the test oil back into the dirty oil tank 1 prevents it from flowing directly back into the clean oil tank 7, potentially causing temperature fluctuations and inaccurate test data. A main valve 1601 of a secondary proportional reversing valve 16 and a flowmeter are connected via a pipeline between the clean oil tank 7 and the dirty oil tank 1, forming an oil pump test pipeline. The pipeline between the main valve 1601 and the clean oil tank 7 is equipped with an oil pump mounting position for mounting the oil pump 11 under test. A negative pressure sensor 8 is installed on the pipeline between the oil pump mounting position and the clean oil tank 7, and a positive pressure sensor 31 is installed on the pipeline between the oil pump mounting position and the main valve 1601. Negative pressure sensor 8 and positive pressure sensor 31 are used to monitor the inlet and outlet pressures of the oil pump 11 under test, providing more comprehensive test data. A main motor 10 and a DC power supply 20 are installed on both sides of the oil pump mounting station. The oil inlet and oil outlet of the oil pump 11 under test are connected to the front and rear interfaces of the oil pump mounting station, respectively. The oil pump 11 under test is driven by the main motor 10 or the DC power supply 20. Two drive systems are set up at the oil pump mounting station, using the main motor 10 or the DC power supply 20 to drive the oil pump 11 under test, realizing a single oil pump and valve block test bench that can test both mechanical oil pumps and electronic oil pumps.

[0052] The oil inlet and outlet of main valve 1601 are connected to the oil pump test line. The pilot valve oil supply device provides pressurized oil to pilot valve 1602 of the secondary proportional reversing valve 16. This controls the opening of main valve 1601, thereby controlling the oil pressure in the oil pump test line. The pilot valve oil supply device includes a pilot pump 23. The oil inlet of pilot pump 23 is connected to the pilot pump oil tank 21. The oil outlet of pilot pump 23 is connected to the oil inlet of pilot valve 1602 via a check valve 26. The oil outlet of pilot valve 1602 is then connected to the pilot pump oil tank 21, forming a pilot valve oil supply circuit. A second safety valve 25 is connected between pilot pump 23 and check valve 26. The oil outlet of second safety valve 25 is connected to the pilot pump oil tank 21. The pilot pump 23 is driven by a pilot pump drive motor 24 . A first filter 18 is provided between the pilot pump 23 and the pilot pump oil tank 21 to prevent impurities in the pilot pump oil tank 21 from entering the pilot pump 23 and affecting the normal use of the pilot pump 23 .

[0053] A valve block test pipeline is connected to the pipeline between the flow meter and the dirty oil tank 1 through a first three-way ball valve 32. A valve block installation position for installing a valve block 30 to be tested is provided on the valve block test pipeline. The inlet of the valve block 30 to be tested is connected to the first three-way ball valve 32, and the outlet of the valve block 30 to be tested is connected to the dirty oil tank 1.

[0054] The clean oil tank 7 contains test oil, and the test oil is heated or cooled by the temperature control device.

[0055] The flowmeter includes a low-temperature turbine flowmeter 13 and a high-temperature gear flowmeter 14 arranged in parallel, one end of each of which is connected to the oil outlet of the main valve 1601 through a second three-way ball valve 12, and the other end of each of which is connected to the first three-way ball valve 32 through another second three-way ball valve 12. Under the premise of a wide range of oil temperature adjustment, if the high-temperature test and the low-temperature test share the same flowmeter, the measurement accuracy is difficult to control and the flowmeter is easily damaged. The present invention adopts a low-temperature turbine flowmeter 13 and a high-temperature gear flowmeter 14 arranged in parallel, and uses the low-temperature turbine flowmeter 13 during low-temperature testing and the high-temperature gear flowmeter 14 during high-temperature testing, thereby improving the measurement accuracy of the flowmeter in a wider range of temperature adjustment.

[0056] A coarse filter 6, an oil pump 4, and a fine filter 9 are connected in sequence between the dirty oil tank 1 and the clean oil tank 7 via piping, forming the test oil return line. Before the test oil from the dirty oil tank 1 returns to the clean oil tank 7, it passes through both the coarse filter 6 and the fine filter 9, achieving high oil cleanliness. This effectively prevents abnormal test data caused by impurities in the test oil clogging the test pump 11.

[0057] The temperature control device includes a mold temperature controller 19. The oil inlet of the mold temperature controller 19 is connected to the clean oil tank 7 via a mold temperature controller oil pump 34. The oil outlet of the mold temperature controller 19 is connected to the clean oil tank 7 via a third filter 35. This device heats or cools the test oil in the clean oil tank 7. The mold temperature controller 19 heats the test oil in the clean oil tank 7, allowing for a wide temperature adjustment range. Furthermore, when the heated test oil flows back into the clean oil tank 7, it is filtered before flowing back into the clean oil tank 7, ensuring that the test oil in the clean oil tank 7 is heated and maintains a high degree of cleanliness.

[0058] A second filter 27 and a second pressure sensor 15 are provided between pilot valve 1602 and check valve 26. The oil inlet of second filter 27 is connected to the outlet of check valve 26, and the oil outlet of second filter 27 is connected to the oil inlet of pilot valve 1602. An accumulator 22 is connected to the pipeline between pilot valve 1602 and second filter 27. The provision of accumulator 22 and second safety valve 25 maintains pressure stability in the pilot valve oil circuit, preventing vibration of pilot valve 1602, which could lead to vibration of main valve 1601 and, in turn, pressure fluctuation at the rear end of the oil pump 11 under test.

[0059] A first safety valve 17 and a first pressure sensor 33 are installed on the valve block test pipeline between the valve block mounting position and the first three-way ball valve 32. The oil outlet of the first safety valve 17 is connected to the dirty oil tank 1, and the oil inlet of the first safety valve 17 is connected to the first three-way ball valve 32. A third safety valve 28 is installed on the oil pump test pipeline between the oil pump mounting position and the main valve 1601. The oil outlet of the third safety valve 28 is connected to the dirty oil tank 1, and the oil inlet of the third safety valve 28 is connected to the oil pump test pipeline.

[0060] Two secondary proportional reversing valves 16 are installed in parallel on the outlet pipeline of the oil pump 11 under test. If the oil pump 11 under test has two oil outlets, connecting the two outlet pipelines in parallel and installing a secondary proportional reversing valve 16 on each outlet pipeline can meet the performance testing requirements of a wider range of oil pumps 11 under test. The number of parallel valves increases or decreases with the number of outlets of the oil pump 11 under test.

[0061] The clean oil tank 7, the dirty oil tank 1, and the pilot pump oil tank 21 are all provided with a thermometer 2 and a liquid level gauge 3, and an oil mist separator 29 is provided at the exhaust port of the three oil tanks. The liquid level gauge 3 is provided to detect the amount of test oil in the oil tank to prevent the oil level from being too low, which affects the normal progress of the test. When the liquid level of the dirty oil tank 1 reaches the warning position, the oil pump motor 5 drives the oil pump 4, and the dirty oil passes through the coarse filter 6 to the fine filter 9, and finally reaches the clean oil tank 7. In addition, the oil mist separator 29 can separate the oil in the gas to achieve the effect of purifying the air. When the test oil temperature reaches the set temperature, turn on the DC power supply 20 or the main motor 10 to perform the electronic oil pump or mechanical oil pump test.

[0062] A comprehensive oil pump and valve block test method, using the above-mentioned comprehensive oil pump and valve block test bench, is characterized by comprising the following steps:

[0063] Step 1: Obtain the device to be tested and install it;

[0064] When the device to be tested is the oil pump 11 to be tested, and it is a mechanical oil pump, the mechanical oil pump is installed in the oil pump installation position and connected to the main motor 10, and the valve block test pipeline is closed through the first three-way ball valve 32;

[0065] When the device to be tested is the oil pump 11 to be tested, and it is an electronic oil pump, the electronic oil pump is installed in the oil pump installation position and connected to the DC power supply 20, and the valve block test pipeline is closed through the first three-way ball valve 32;

[0066] When the device to be tested is a valve block 30 to be tested, install an oil supply pump at the oil pump installation position. If the oil supply pump is a mechanical oil pump, connect it to the main motor 10. If the oil supply pump is an electronic oil pump, connect it to the DC power supply 20. After the connection is completed, install the valve block 30 to be tested, and control the first three-way ball valve 32 to operate to open the valve block test pipeline;

[0067] Step 2: Turn on the mold temperature controller 19 to heat or cool the test oil in the clean oil tank 7 to a set temperature. The temperature control range of the mold temperature controller 19 is -40°C to 140°C.

[0068] Step 3: Turn on the flow meter according to the set temperature in step 2;

[0069] When the set temperature is -40°C to 70°C, the low-temperature turbine flowmeter 13 is turned on and the high-temperature gear flowmeter 14 is turned off;

[0070] When the set temperature is between 70°C and 140°C, the high-temperature gear flowmeter 14 is turned on and the low-temperature turbine flowmeter 13 is turned off;

[0071] Step 4: Observe the pressure value displayed by the positive pressure sensor 31, and adjust the oil pump test pipeline to the pressure value required for the test through the secondary proportional reversing valve 16;

[0072] When the pressure value of the oil pump test pipeline needs to be stabilized within the set range, observe the pressure value displayed by the positive pressure sensor 31 and adjust the valve core current value of the pilot valve 1602 to control the opening of the main valve 1601 so that the pressure value of the oil pump test pipeline is stabilized within the set range;

[0073] When the pressure value of the oil pump test pipeline needs to change periodically, the pressure value displayed by the positive pressure sensor 31 is observed, and the valve core current of the pilot valve 1602 is adjusted to change periodically to control the opening of the main valve 1601 to change periodically, so that the pressure value of the oil pump test pipeline changes periodically;

[0074] Step 5: Conduct performance tests on the mechanical oil pump, electronic oil pump, or valve block, obtain corresponding test data, and complete the test.

[0075] Among them, when conducting a mechanical oil pump performance test, the performance test includes an oil pump displacement test, an oil pump efficiency test, an oil pump cold pneumatic test, an oil pump high temperature test, and an oil pump fatigue test; when conducting an electronic oil pump performance test, the performance test includes an electronic oil pump driving performance test, an electronic oil pump durability test, an electronic oil pump protection function test, and an electronic oil pump energy efficiency test; when conducting a valve block performance test, the performance test includes a valve block response speed test and a valve block back pressure control accuracy test.

[0076] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A comprehensive oil pump and valve block test bench, characterized by: The oil pump test pipeline comprises a clean oil tank (7) and a dirty oil tank (1), wherein a main valve (1601) of a secondary proportional reversing valve (16) and a flow meter are sequentially connected between the clean oil tank (7) and the dirty oil tank (1) through a pipeline to form an oil pump test pipeline; An oil pump installation position for installing the oil pump to be tested (11) is provided on the pipeline between the main valve (1601) and the clean oil tank (7), a negative pressure sensor (8) is provided on the pipeline between the oil pump installation position and the clean oil tank (7), and a positive pressure sensor (31) is provided on the pipeline between the oil pump installation position and the main valve (1601); a main motor (10) and a DC power supply (20) are provided on the peripheral side of the oil pump installation position, and the oil inlet and the oil outlet of the oil pump to be tested (11) are respectively connected to the front end and the rear end interface of the oil pump installation position, and the oil pump to be tested (11) is driven by the main motor (10) or driven by the DC power supply (20); The oil inlet and the oil outlet of the main valve (1601) are connected to the oil pump test pipeline, and the pilot valve oil supply device provides pressurized oil to the pilot valve (1602) of the secondary proportional reversing valve (16), and controls the opening of the main valve (1601) through the pilot valve (1602), thereby controlling the oil pressure of the oil pump test pipeline; A valve block test pipeline is connected to the pipeline between the flow meter and the dirty oil tank (1) via a first three-way ball valve (32); a valve block installation position for installing a valve block to be tested (30) is provided on the valve block test pipeline; an inlet of the valve block to be tested (30) is connected to the first three-way ball valve (32), and an outlet of the valve block to be tested (30) is connected to the dirty oil tank (1); The clean oil tank (7) contains test oil, and the test oil is heated or cooled by a temperature control device.

2. The integrated oil pump and valve block test bench according to claim 1 is characterized in that: The flowmeter comprises a low-temperature turbine flowmeter (13) and a high-temperature gear flowmeter (14) arranged in parallel, one end of each of which is connected to the oil outlet of the main valve (1601) through a second three-way ball valve (12), and the other end of each of which is connected to the first three-way ball valve (32) through another second three-way ball valve (12).

3. The integrated oil pump and valve block test bench according to claim 1 is characterized in that: The pilot valve oil supply device comprises a pilot pump (23), the oil inlet of the pilot pump (23) is connected to the pilot pump oil tank (21), the oil outlet of the pilot pump (23) is connected to the oil inlet of the pilot valve (1602) via a one-way valve (26), the oil outlet of the pilot valve (1602) is connected to the pilot pump oil tank (21), forming a pilot valve oil supply circuit, a second safety valve (25) is connected between the pilot pump (23) and the one-way valve (26), and the oil outlet of the second safety valve (25) is connected to the pilot pump oil tank (21).

4. The integrated oil pump and valve block test bench according to claim 1 is characterized in that: The dirty oil tank (1) and the clean oil tank (7) are connected in sequence to a coarse filter (6), an oil pump (4) and a fine filter (9) through pipelines to form a test oil return pipeline.

5. The integrated oil pump and valve block test bench according to claim 1 is characterized in that: The temperature control device comprises a mold temperature controller (19), an oil inlet of the mold temperature controller (19) is connected to the clean oil tank (7) via a mold temperature controller oil pump (34), and an oil outlet of the mold temperature controller (19) is connected to the clean oil tank (7) via a third filter (35), so as to heat or cool the test oil in the clean oil tank (7).

6. The integrated oil pump and valve block test bench according to claim 3 is characterized by: A second filter (27) and a second pressure sensor (15) are provided between the pilot valve (1602) and the one-way valve (26); the oil inlet of the second filter (27) is connected to the outlet of the one-way valve (26); the oil outlet of the second filter (27) is connected to the oil inlet of the pilot valve (1602); and an accumulator (22) is connected to the pipeline between the pilot valve (1602) and the second filter (27); On the valve block test pipeline, a first safety valve (17) and a first pressure sensor (33) are provided between the valve block installation position and the first three-way ball valve (32); the oil outlet of the first safety valve (17) is connected to the dirty oil tank (1), and the oil inlet of the first safety valve (17) is connected to the first three-way ball valve (32); A third safety valve (28) is provided on the oil pump test pipeline between the oil pump installation position and the main valve (1601), the oil outlet of the third safety valve (28) is connected to the dirty oil tank (1), and the oil inlet of the third safety valve (28) is connected to the oil pump test pipeline.

7. The integrated oil pump and valve block test bench according to claim 3 is characterized by: There are two secondary proportional reversing valves (16), and the two secondary proportional reversing valves (16) are arranged in parallel; The clean oil tank (7), the dirty oil tank (1), and the pilot pump oil tank (21) are all provided with a thermometer (2) and a liquid level gauge (3), and an oil mist separator (29) is provided at the exhaust port.

8. A comprehensive oil pump and valve block test method, using the comprehensive oil pump and valve block test bench according to any one of claims 1 to 7; characterized in that: The following steps are involved: Step 1: Obtain the device to be tested and install it; When the device to be tested is an oil pump to be tested (11), and is a mechanical oil pump, the mechanical oil pump is installed in the oil pump installation position and connected to the main motor (10), and the valve block test pipeline is closed through the first three-way ball valve (32); When the device to be tested is an oil pump to be tested (11), and is an electronic oil pump, the electronic oil pump is installed in the oil pump installation position and connected to a DC power supply (20), and the valve block test pipeline is closed through a first three-way ball valve (32); When the device to be tested is a valve block to be tested (30), an oil supply pump is installed at the oil pump installation position. If the oil supply pump is a mechanical oil pump, it is connected to the main motor (10). If the oil supply pump is an electronic oil pump, it is connected to the DC power supply (20). After the connection is completed, the valve block to be tested (30) is installed, and the first three-way ball valve (32) is controlled to operate to open the valve block test pipeline; Step 2: Turn on the temperature control device to heat or cool the test oil in the clean oil tank (7) to a set temperature; Step 3: Turn on the flow meter according to the set temperature in step 2; Step 4: Observe the pressure value displayed by the positive pressure sensor (31), and adjust the oil pump test pipeline to the pressure value required for the test through the secondary proportional reversing valve (16); Step 5: Conduct performance tests on the mechanical oil pump, electronic oil pump, or valve block, obtain corresponding test data, and complete the test.

9. The comprehensive oil pump and valve block testing method according to claim 8, characterized in that: Step three is as follows: When the set temperature in step 2 is less than 70° C., the low-temperature turbine flowmeter (13) is turned on and the high-temperature gear flowmeter (14) is turned off; When the set temperature is greater than 70°C, the high-temperature gear flowmeter (14) is turned on and the low-temperature turbine flowmeter (13) is turned off; Step 4 is as follows: When the pressure value of the oil pump test pipeline needs to be stabilized within a set range, the pressure value displayed by the positive pressure sensor (31) is observed, and the valve core current value of the pilot valve (1602) is adjusted to control the opening of the main valve (1601) so that the pressure value of the oil pump test pipeline is stabilized within the set range; When the pressure value of the oil pump test pipeline needs to change periodically, the pressure value displayed by the positive pressure sensor (31) is observed, and the valve core current of the pilot valve (1602) is adjusted to change periodically to control the opening of the main valve (1601) to change periodically, so that the pressure value of the oil pump test pipeline changes periodically.

10. The comprehensive oil pump and valve block testing method according to claim 9, characterized in that: In step 2, the temperature control range of the temperature control device is -40°C to 140°C; In step five, when conducting a mechanical oil pump performance test, the performance test includes an oil pump displacement test, an oil pump efficiency test, an oil pump cold pneumatic test, an oil pump high temperature test, and an oil pump fatigue test; when conducting an electronic oil pump performance test, the performance test includes an electronic oil pump drive performance test, an electronic oil pump durability test, an electronic oil pump protection function test, and an electronic oil pump energy efficiency test; when conducting a valve block performance test, the performance test includes a valve block response speed test and a valve block back pressure control accuracy test.

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