CN109540501B - Test bed for testing pilot pump valve integration and working method thereof - Google Patents
Test bed for testing pilot pump valve integration and working method thereof Download PDFInfo
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- CN109540501B CN109540501B CN201910085483.2A CN201910085483A CN109540501B CN 109540501 B CN109540501 B CN 109540501B CN 201910085483 A CN201910085483 A CN 201910085483A CN 109540501 B CN109540501 B CN 109540501B
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
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- 238000009863 impact test Methods 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000011056 performance test Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 description 9
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Abstract
The invention provides a test bed for testing pilot pump valve integration, which comprises a test bed, wherein a first motor is arranged on the test bed, a torquemeter is connected on an output shaft of the first motor in series, a tachometer is connected on the torquemeter in series, an integrated piece to be tested is connected on the tachometer, a first cartridge valve is connected on an output end of the integrated piece to be tested, a first high-pressure oil filter is connected between the first cartridge valve and the integrated piece to be tested, a first thermometer is connected between the first high-pressure oil filter and the integrated piece to be tested, a first pressure gauge is also connected between the first thermometer and the first high-pressure oil filter, a first overflow valve is sequentially connected on an oil outlet of the first high-pressure oil filter, the first electro-hydraulic proportional valve and the first cover plate form a parallel loop with the first overflow valve, the input end of the tested integrated part is connected with an electric control valve, and a vacuum meter is connected between the oil outlet of the electric control valve and the tested integrated part. The invention has simple structure, convenience, high efficiency and practicability.
Description
Technical Field
The invention relates to a test bed for testing pilot pump valve integration and a working method thereof.
Background
As shown in fig. 1, a hydraulic component integration hydraulic principle, a tested integrated component includes a steering pump 101, a pilot pump 102, an overflow valve 103, P0 is an oil suction port, Pp is a steering pump oil outlet, Pc is a pilot pump oil outlet, P1 is a pilot pump internal oil inlet, and P2 is an overflow valve oil drain port, the overflow valve in the tested integrated component can be separately tested, but the steering pump and the pilot pump have a plurality of non-interfering oil outlets due to complex internal oil paths, and cannot be directly tested on a traditional test bench, generally, a total integrated component is mounted on the traditional test bench to perform simple operation and initial flow index testing, or the total integrated component is directly run in along with a host, and the assessment modes are difficult to directly present local hydraulic component problems, and bring quality hidden troubles to manufacturers. Therefore, a convenient, efficient, safe and reliable test bed is needed in the engineering machinery industry to carry out factory tests and type tests on the hydraulic element integrated parts so as to verify the performance and indexes of the integrated parts.
Disclosure of Invention
The invention improves the problems, namely the invention aims to provide a test bed for testing the integration of a pilot pump valve and a working method thereof, and the test bed is efficient, convenient, safe and reliable.
The specific embodiment of the invention is as follows: the invention provides a test bed for testing pilot pump valve integration, which comprises a test bed, wherein a steering pump performance testing system is arranged on the test bed, the steering pump performance testing system comprises a first motor, a torque meter is connected in series on an output shaft of the first motor, a tachometer is connected in series on the torque meter, a tested integrated part is connected on the tachometer, a Pp port of the tested integrated part is connected with a first plug-in valve, a first high-pressure oil filter is connected between the first plug-in valve and the tested integrated part, a first thermometer is connected between the first high-pressure oil filter and the tested integrated part, a first pressure gauge is connected between the first thermometer and the first high-pressure oil filter, a first overflow valve, a first electro-hydraulic proportional valve and a first cover plate are connected on an oil outlet of the first high-pressure oil filter, the first electro-hydraulic proportional valve and the first overflow valve form a parallel loop, first electricity liquid proportional valve oil-out meets with first cartridge valve oil-out, be connected with the check valve group on the first cartridge valve, the check valve group includes two four-way reversing valve of second, first apron and second cartridge valve, be connected with first flowmeter on the second cartridge valve, be connected with first rearmounted filter on the first flowmeter, be connected with electrical control valve on the integrated piece P0 mouth of being tested, be connected with the vacuum gauge between electrical control valve oil-out and the integrated piece of being tested, be connected with the main tank on the electrical control valve oil inlet, be equipped with first filter between main tank oil outlet end and the electrical control valve, the main tank oil inlet is connected with first rearmounted filter output.
Furthermore, a steering pump impact test system is further arranged on the test bed, the steering pump impact device comprises a first two-position four-way reversing valve connected with the oil outlet of the first high-pressure oil filter, a first three-position four-way reversing valve is connected between a port P of the first two-position four-way reversing valve and the first electro-hydraulic proportional valve, the position in the first three-position four-way reversing valve can be set to be O-shaped, a port A of the first three-position four-way reversing valve is connected with the oil outlet of the first high-pressure oil filter, a port B of the first three-position four-way reversing valve is connected with the oil outlet of the first cartridge valve, a port P of the first three-position four-way reversing valve is connected with a fourth overflow valve, and a port T of the first three-position four-way.
Furthermore, a check valve group consisting of a third two-position four-way reversing valve, a second cover plate and a third cartridge valve is further arranged on the test bed, the oil outlet of the first cartridge valve is connected with the oil inlet of the third cartridge valve, the oil outlet of the third cartridge valve is connected with a first flowmeter, the second cover plate is arranged on the third cartridge valve, a P port of the third two-position four-way reversing valve is connected with a control oil port of the third cartridge valve, an A port of the third two-position four-way reversing valve is connected with the oil outlet of the first high-pressure oil filter, and a B port of the third two-position four-way reversing valve is connected with the oil outlet of the third cartridge valve.
Further, a pilot pump performance testing system is further arranged on the test bed, the pilot pump performance testing system comprises a fifth cartridge valve, a fourth cartridge valve is connected to an oil inlet of the fifth cartridge valve, an oil inlet of the fourth cartridge valve is connected with a tested integrated part, a second flowmeter is further connected to an oil outlet of the fifth cartridge valve, a second post-filter is connected to an output end of the second flowmeter, an outlet of the second post-filter is connected with the main oil tank, a second pressure gauge and a second thermometer are sequentially connected between a Pc port of the tested integrated part and the fourth cartridge valve, a second high-pressure oil filter overflow valve is arranged between the second pressure gauge and the fourth cartridge valve, a second electro-hydraulic proportional valve and a third cover plate located above the fifth cartridge valve are connected to an oil outlet of the second high-pressure oil filter, the second electro-hydraulic proportional valve and the second overflow valve form a parallel loop, an oil outlet of the second electro-hydraulic proportional valve and an oil outlet of the second overflow valve are connected to an oil outlet of a fourth cartridge valve respectively, a third cover plate is connected to the fifth cartridge valve, a fifth two-position four-way reversing valve is connected to the third cover plate, the fifth two-position four-way reversing valve, the third cover plate and the fifth cartridge valve form a one-way valve group, a P port of the fifth two-position four-way reversing valve is connected with a control oil port of the fifth cartridge valve, an A port of the fifth two-position four-way reversing valve is connected with an oil outlet of the second high-pressure oil filter, and a B port of the fifth two-position four-way reversing valve is connected with an.
Furthermore, the oil outlet of the fourth cartridge valve is connected with a port A of a fourth two-position four-way reversing valve, the oil outlet of the second high-pressure oil filter is connected with a port P of the fourth two-position four-way reversing valve, the fourth two-position four-way reversing valve is further connected with a second three-position four-way reversing valve, the middle position of the second three-position four-way reversing valve is in an O shape, a port B of the second three-position four-way reversing valve is connected with the second high-pressure oil filter, a port P of the second three-position four-way reversing valve is connected with an oil inlet of a sixth overflow valve, a port T of the second three-position four-way reversing valve is connected with an oil inlet of a seventh overflow valve, an oil outlet of the second three-position four-way reversing valve and an oil outlet of the sixth overflow valve are respectively connected with the oil outlet of.
Further, a pilot pump impact test system is further arranged on the test bed and comprises a sixth cartridge valve, an oil inlet of the sixth cartridge valve is connected with an oil outlet of the fourth cartridge valve, an oil outlet of the sixth cartridge valve is connected with an oil outlet of the second flowmeter, a fourth cover plate is connected to the sixth cartridge valve, a sixth two-position four-way reversing valve is arranged on the fourth cover plate, a P port of the sixth two-position four-way reversing valve is connected with a control oil port of the sixth cartridge valve, an A port of the sixth two-position four-way reversing valve is connected with the oil outlet of the sixth cartridge valve, and a B port of the sixth two-position four-way reversing valve is connected with a high-pressure oil outlet of the second high-pressure oil filter.
Furthermore, an overflow valve performance testing system is further arranged on the test bed and comprises a third flow meter connected with an oil inlet of the main oil tank, a throttling valve is connected between the third flow meter and the tested integrated part, and a third pressure gauge is connected between the throttling valve and the tested integrated part.
Further, be provided with overflow valve transient characteristic and durability test system on the test bench, overflow valve transient characteristic and durability test system include seventh two four-way reversing valve, be connected with the variable pump on the seventh two four-way reversing valve P mouth, the variable pump oil inlet is connected with the main tank, still be equipped with the second filter between main tank and the variable pump, integrated piece P1 mouth is connected with the step load valve by the examination, the step load valve control mouth is connected with seventh two four-way reversing valve A mouth, be equipped with the fourth pressure gauge between seventh two four-way reversing valve and the variable pump, be connected with the third overflow valve between seventh two four-way reversing valve and the variable pump, be equipped with the third filter between third overflow valve and the variable pump.
Further, a temperature control filtering test system is also arranged on the test bed and comprises a second constant delivery pump, a sixth filter is connected to the inlet of the second fixed displacement pump, a main oil tank is connected to the sixth filter, the outlet of the second quantitative pump is connected with a three-way valve, the oil outlet of the three-way valve is connected with a first one-way valve, the outlet of the first one-way valve is sequentially connected with a seventh filter and an eighth filter, the inlet and the outlet of the seventh filter are also connected with a second one-way valve in parallel, the eighth filter is connected in parallel with a third one-way valve, the three-way valve is also connected with the main oil tank through another branch, the outlet of the eighth filter is connected with a heat exchanger, the heat exchanger is provided with an electric control switch valve, the outlet of the heat exchanger is connected with the main oil tank, and the second constant delivery pump is also connected with a third motor.
Further, the working method of the test bed for testing the pilot pump valve integration comprises the following steps: (1) the first motor drives the torque meter, the torque meter drives the tachometer, the tachometer drives the input shaft of the tested integrated piece, and a low-pressure area is formed at the oil inlet of the tested integrated piece; (2) under the action of atmospheric pressure, oil is pressed into a first filter from a main oil tank and then enters an electric regulating valve; (3) oil of the electric regulating valve is sucked into an integrated part to be tested and divided into two branches, the first branch passes through a first cartridge valve to a second two-position four-way reversing valve, a first cover plate and a second cartridge valve, finally returns to a main oil tank through a first flowmeter and a first post-filter, and regulates loop pressure through a first electro-hydraulic proportional valve; (4) the second branch oil returns to the main oil tank through a second flow meter and a second post filter through a fourth cartridge valve, a second overflow valve and a fourth two-position four-way reversing valve, and the loop pressure is adjusted through a second electro-hydraulic proportional valve; (5) the pressure difference between an oil inlet and an oil outlet in the tested integrated part is controlled by adjusting a second electro-hydraulic proportional valve and a throttle valve; (6) measuring a system temperature by a first thermometer and a second thermometer; (7) measuring the vacuum degree by adopting a vacuum meter by adjusting the opening of the electric regulating valve; (8) measuring the pressure value of each branch by using a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge and a fifth pressure gauge; (9) and measuring the flow value of each branch by the first flowmeter, the second flowmeter and the third flowmeter respectively.
Compared with the prior art, the invention has the following beneficial effects: the invention has simple structure, reasonable design, high efficiency, convenience, safety and reliability, and can effectively make up for the defect that the traditional test bed can not directly carry out pump valve linkage test or adopt the running of the whole machine to be not visual, so that the technology is perfect.
Drawings
FIG. 1 is a schematic structural diagram of an integrated component to be tested according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 101. a steering pump; 102 a pilot pump; 103 an overflow valve; 1. a main oil tank; a first filter; 2b. a second filter; 2c. a third filter; a fourth filter; a fifth filter; 2f. a sixth filter; 2g. seventh filter, 2h. eighth filter; 3. an electric control valve; 4. a vacuum gauge; 5. a first motor; 6, a torquemeter; 7. a tachometer; 8. the integrated piece to be tested; 9a. a first pressure gauge; 9b. a second pressure gauge; 9c a third pressure gauge; 9d fourth pressure gauge; 9e. a fifth pressure gauge; 10 a first high-pressure oil filter; 11. a first cartridge valve; 12, a first overflow valve; 13. a first two-position four-way reversing valve; 14. a first three-position four-way reversing valve; 15. a fourth spill valve; 16 a fifth relief valve; 17. a first electro-hydraulic proportional valve; 18 a second two-position, four-way reversing valve; 19. a first cover plate; 20. a second cartridge valve; 21. a third two-position four-way reversing valve; 22. a second cover plate; 23. a third cartridge valve; a first flow meter; 25. a first post-filter; 26. a second high-pressure oil filter; 27. a fourth cartridge valve; 28. a second overflow valve; 29. a fourth two-position four-way reversing valve; 30. a second three-position four-way reversing valve; 31 a sixth relief valve; 32. a seventh relief valve; 33. a fifth two-position four-way reversing valve; 34. a third cover plate; 35. a fifth cartridge valve; 36. a sixth two-position four-way selector valve; 37. a fourth cover plate; 38. a sixth cartridge valve; a second flow meter; 40. a second post-filter; 41. an air cleaner; 42. a liquid level meter; 43. a throttle valve; 44. a third flow meter; 45. a variable displacement pump; 46. a third overflow valve; 47. a seventh two-position four-way selector valve; 48. a step load valve; 49. an leaked oil recovery tank; 50. a liquid level switch; 51. a first fixed displacement pump; 52. a second motor; 53. a third motor; 54. a second fixed displacement pump; 55. a three-way valve; 56a. a first one-way valve; 56b. a second one-way valve; 56 c-third check valve, 57 heat exchanger; 58. an electrically controlled on-off valve; 59a. a first thermometer; 59b. a second thermometer; 60. and the second electro-hydraulic proportional valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b): as shown in fig. 2, in the present embodiment, a test bench for testing pilot pump valve integration is provided, which includes a test bench, a steering pump performance testing system is provided on the test bench, the steering pump performance testing system includes a first motor 5, a torque meter 6 is connected in series to an output shaft of the first motor 5, a tachometer 7 is connected in series to the torque meter 6, an integrated piece 8 to be tested is connected to the tachometer 7, a first cartridge valve 11 is connected to a Pp port of the integrated piece 8 to be tested, a first high-pressure oil filter 10 is connected between the first cartridge valve 11 and the integrated piece 8 to be tested, a first high-pressure oil filter 59a is connected between the first high-pressure oil filter 10 and the integrated piece 10 to be tested, a first pressure gauge 9a is connected between the first high-pressure oil filter 59a and the first high-pressure oil filter 10, and a first overflow valve 12, a first thermometer 9a is connected to an oil outlet of the first high-pressure, A first electro-hydraulic proportional valve 17 and a first cover plate 19, the oil outlet of a parallel loop formed by the first electro-hydraulic proportional valve 17 and the first overflow valve 12 is connected with the oil outlet of the first cartridge valve 11, the first cartridge valve 11 is connected with a check valve group, the check valve group comprises a second two-position four-way reversing valve 18, a first cover plate 19 and a second cartridge valve 20 which are connected in sequence, a first flow meter 24 is connected to the second cartridge 20, a first post-filter 25 is connected to the first flow meter 24, the port P0 of the tested integrated component 8 is connected with an electric control valve 3, a vacuum meter 4 is connected between the oil outlet of the electric control valve 3 and the tested integrated component 8, the oil inlet of the electric regulating valve 3 is connected with a main oil tank 1, a first filter 2a is arranged between the oil outlet end of the main oil tank 1 and the electric regulating valve 3, and the oil inlet of the main oil tank 1 is connected with the output end of a first post-filter 25.
In this embodiment, the test bed is further provided with a steering pump impact test system, the steering pump impact device comprises a first two-position four-way reversing valve 13 connected with the oil outlet of the first high-pressure oil filter 10, a first three-position four-way reversing valve 14 is connected between a port P of the first two-position four-way reversing valve and the first electro-hydraulic proportional valve 17, a port a of the first two-position four-way reversing valve is connected with the oil outlet of the first cartridge valve 11, a port B of the first three-position four-way reversing valve is connected with the oil inlet of the fourth overflow valve 15, a port T of the first three-position four-way reversing valve is connected with the oil inlet of the fifth overflow valve 16, and a port P of the first three-position four-way reversing valve and the oil outlet of the fourth overflow valve 15 are respectively connected with the oil outlet of the first cartridge valve 11, and the port B of the first three-position four-way reversing valve and the oil outlet of the fifth overflow valve 16 are respectively connected with the oil outlet of the first cartridge valve 11.
The on-off of the first cartridge valve 11 is controlled by controlling the loss of the potential of the first two-position four-way reversing valve 13, and the working position of the first three-position four-way reversing valve 14 is controlled by controlling the loss of the potential of the first three-position four-way reversing valve 14, so that the fourth overflow valve 15 or the fifth overflow valve 16 is controlled to be connected into a parallel loop, in addition, the first two-position four-way reversing valve 13 can input an impact waveform, and the impact pressure can be adjusted by the fourth overflow valve 15 or the fifth overflow valve 16, so that the operation is simple and rapid.
In this embodiment, the test bed is further provided with a check valve group consisting of a third two-position four-way reversing valve 21, a second cover plate 22 and a third cartridge valve 23, the oil outlet of the first cartridge valve 11 is further connected with the third cartridge valve 23, the oil outlet of the third cartridge valve 23 is connected to the oil outlet of the first flow meter 24, the second cover plate 22 is arranged on the third cartridge valve 23, a port P of the third two-position four-way reversing valve is connected with a control oil port of the third cartridge valve 23, a port a of the third two-position four-way reversing valve is connected with the oil outlet of the first high-pressure oil filter 10, a port B of the third two-position four-way reversing valve is connected with the oil outlet of the third cartridge valve 23, and the on-off of the third cartridge valve 23 can be controlled by controlling the potential 21 of the third two-.
In this embodiment, the test bed is further provided with a pilot pump performance testing system, the pilot pump performance testing system includes a fifth cartridge valve 35, an oil inlet of the fifth cartridge valve 35 is connected with a fourth cartridge valve 27, an oil inlet of the fourth cartridge valve 27 is connected with a Pc port of the tested integrated part 8, an oil outlet of the fifth cartridge valve 35 is further connected with a second flowmeter 39, an output end of the second flowmeter 39 is connected with a second post-filter 40, an outlet of the second post-filter 40 is connected with the main oil tank 1, a second pressure gauge 9b and a second temperature gauge 59b are sequentially connected between the tested integrated part 8 and the fourth cartridge valve 27, a second high-pressure oil filter 26 is arranged between the second pressure gauge 9b and the fourth cartridge valve 27, an oil outlet of the second high-pressure oil filter 26 is connected with a second overflow valve 28, a second electro-hydraulic proportional cartridge valve 60, and a third cover plate 34 located above the fifth cartridge valve 35, the second electro-hydraulic proportional valve 60 and the second overflow valve 28 form a parallel loop, oil outlets of which are all connected to an oil outlet of the fourth cartridge valve 27, a third cover plate 34 is connected to the fifth cartridge valve 35, a fifth two-position four-way reversing valve 33 is connected to the third cover plate 34, the fifth two-position four-way reversing valve 33, the third cover plate 34 and the fifth cartridge valve 35 form a one-way valve group, a port P of the fifth two-position four-way reversing valve is connected with a control oil port of the fifth cartridge valve 35, a port A of the fifth two-position four-way reversing valve is connected with an oil outlet of the second high-pressure oil filter 26, and a port B of the fifth two-position four-way reversing valve is connected with an oil outlet of.
The on-off of the fifth cartridge valve 35 is controlled by controlling the potential of the fifth two-position four-way reversing valve 33 to be lost, and a rotating speed test is carried out by controlling the rotating speed of the first motor 5; meanwhile, a vacuum test is carried out by adjusting the opening size of the electric control valve 3, and a running-in test is carried out by controlling the second electro-hydraulic proportional valve to carry out loading; the pressure in the test system is adjusted through the second overflow valve 28, the rotating speed of the input shaft of the first motor is tested through the tachometer 7, the torque of the input shaft of the first motor is tested through the torquemeter 6, the vacuum degree is tested through the vacuum meter 4, and the temperature is tested through the first thermometer and the second thermometer, so that the test system is simple, visual and synchronous.
In this embodiment, an oil outlet of the fourth cartridge valve 27 is connected to an a port of a fourth two-position four-way reversing valve 29, an oil outlet of the second high-pressure oil filter 26 is connected to a P port of the fourth two-position four-way reversing valve, the fourth two-position four-way reversing valve 29 is further connected to a second three-position four-way reversing valve 30, the position of the second three-position four-way reversing valve 30 can be in an O shape, a B port of the second three-position four-way reversing valve is connected to the second high-pressure oil filter 26, the P port of the second three-position four-way reversing valve is connected to an oil inlet of a sixth overflow valve 31, the T port of the second three-position four-way reversing valve is connected to an oil inlet of a seventh overflow valve 32, and oil outlets of the second three-position four-way reversing valve a port.
In this embodiment, the test bed is further provided with a pilot pump impact test system, the pilot pump impact test system includes a sixth cartridge valve 38, an oil inlet of the sixth cartridge valve 38 is connected with an oil outlet of the fourth cartridge valve 27, an oil outlet of the sixth cartridge valve 38 is connected with an oil outlet of the second flowmeter 39, the sixth cartridge valve 38 is connected with a fourth cover plate 37, the fourth cover plate 37 is provided with a sixth two-position four-way reversing valve 36, a port P of the sixth two-position four-way reversing valve is connected with a control oil port of the sixth cartridge valve 38, a port a of the sixth two-position four-way reversing valve is connected with the oil outlet of the sixth cartridge valve 38, a port B of the sixth two-position four-way reversing valve is connected with the second high-pressure oil filter 26, and the on-off of the sixth cartridge valve can be controlled by controlling the potential of the sixth two-position four-way.
In this embodiment, the test bed is further provided with an overflow valve performance test system, the overflow valve performance test system includes a third flow meter 44 connected to an oil inlet of the main oil tank 1, a throttle valve 43 is connected between the third flow meter 44 and a P2 port of the tested integrated piece 8, and a third pressure gauge 9c is connected between the throttle valve 43 and a P2 port of the tested integrated piece 8.
In the embodiment, the test bed is provided with a relief valve transient characteristic and durability test system, the relief valve transient characteristic and durability test system includes a seventh two-position four-way selector valve 47, the port P of the seventh two-position four-way reversing valve is connected with a variable pump 45, the oil inlet of the variable pump 45 is connected with the main oil tank 1, a second filter 2b is arranged between the main oil tank 1 and the variable pump 45, a port P1 of the tested integrated component 8 is connected with a step loading valve 48, the control port of the step loading valve 48 is connected with the port A of the seventh two-position four-way reversing valve, a fourth pressure gauge 9d is arranged between the seventh two-position four-way reversing valve 47 and the variable pump 45, a third overflow valve 46 is connected between the seventh two-position four-way reversing valve 47 and the variable pump 45, and a third filter 2c is arranged between the third overflow valve 46 and the variable pump 45.
In this embodiment, the test bed is further provided with a temperature control filtration test system, the temperature control filtration test system includes a second fixed displacement pump 54, an inlet of the second fixed displacement pump 54 is connected with a sixth filter 2f, the sixth filter 2f is connected with a main oil tank 1, an outlet of the second fixed displacement pump 54 is connected with a three-way valve 55, an oil outlet of the three-way valve 55 is connected with a first one-way valve 56a, an outlet of the first one-way valve 56a is sequentially connected with a seventh filter 2g and an eighth filter 2h, an inlet and an outlet of the seventh filter 2g are further connected in parallel with a second one-way valve 56b, the eighth filter is connected in parallel with a third one-way valve 56c, the three-way valve 55 is further connected with the main oil tank 1 through another branch, an outlet of the eighth filter 2h is connected with a heat exchanger 57, the heat exchanger 57 is provided with an electric control switch valve 58, the outlet of the heat exchanger 57 is connected with the main oil tank 1, the second fixed displacement pump 54 is further connected with a third motor 53, and a fifth pressure gauge 9e is arranged between the first one-way valve and the three-way valve.
In this embodiment, still be provided with the oil leak recovery system on the test bench, the oil leak recovery system includes oil leak collection box 49, be equipped with hydraulic switch 50 on the oil leak collection box, be connected with fourth filter 2d on the oil leak collection box export, be connected with first ration pump 51 on the fourth filter 2d oil-out, be connected with fifth filter 2e on the first ration pump output, the oil-out of fifth filter 2e is connected with main oil tank 1, still be equipped with the second motor 52 of the first ration pump 51 of drive on the first ration pump 51.
When the liquid level of the leaked oil recovery tank 49 rises, the hydraulic switch 50 is triggered, the first motor is started to drive the first constant displacement pump, the leaked oil is fed back to the main oil tank 1 through the fourth filter 2d and the fifth filter 2e, the fourth filter is a coarse filter, and the fifth filter is a fine filter.
In this embodiment, the test bed is further provided with accessories for assisting attachment to the main oil tank, and the accessories include an air filter 41 and a liquid level meter 42 which are connected in sequence, so that observation is facilitated.
In the embodiment, during operation, the first motor 5 drives the torquemeter 6, the torquemeter 6 drives the tachometer 7, the tachometer 7 drives the input shaft of the tested integrated component 8, a low-pressure area is formed at the oil inlet of the tested integrated component 8, under the action of atmospheric pressure, oil is pressed into the first filter from the main oil tank 1 and then enters the electric control valve, the oil of the electric control valve is sucked into the tested integrated component and is divided into two branches, the first branch passes through the first cartridge valve to the second two-position four-way reversing valve, the first cover plate and the second cartridge valve, finally returns to the main oil tank through the first flow meter and the first post-filter, and regulates the loop pressure through the first electro-hydraulic proportional valve, the oil of the second branch passes through the fourth cartridge valve, the second overflow valve and the fourth two-position four-way reversing valve, returns to the main oil tank through the second flow meter and the second post-filter, and regulates the loop pressure through the second electro-hydraulic proportional, the pressure difference of an oil inlet and an oil outlet in the tested integrated part is controlled by adjusting a second electro-hydraulic proportional valve and a throttle valve, the temperature of the system is measured by a first thermometer and a second thermometer, the vacuum degree is measured by adopting a vacuum gauge by adjusting the opening of an electric regulating valve, the pressure value of each branch is measured by a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge and a fifth pressure gauge, and the flow value of each branch is measured by a first flowmeter, a second flowmeter and a third flowmeter respectively. The invention has novel design, simple structure, convenient and fast operation, safety and reliability, novelty and practicability, and can simultaneously test the tested integrated piece combination.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (2)
1. A test bench for testing pilot pump valve integration is characterized by comprising a test bench, wherein a steering pump performance testing system is arranged on the test bench and comprises a first motor, a torque meter is connected to an output shaft of the first motor in series, a tachometer is connected to the torque meter in series, a tested integration piece is connected to the tachometer, a first cartridge valve is connected to a Pp port of the tested integration piece, a first high-pressure oil filter is connected between the first cartridge valve and the tested integration piece, a first thermometer is connected between the first high-pressure oil filter and the tested integration piece, a first pressure gauge is connected between the first thermometer and the first high-pressure oil filter, a first overflow valve, a first electro-hydraulic proportional valve and a first cover plate are connected to an oil outlet of the first high-pressure oil filter, and the first electro-hydraulic proportional valve and the first overflow valve form a parallel loop, the test bench is also provided with a steering pump impact test system, the steering pump impact device comprises a first two-position four-way reversing valve connected with an oil outlet of a first high-pressure oil filter, a first three-position four-way reversing valve is connected between a port P of the first two-position four-way reversing valve and the first electro-hydraulic proportional valve, the middle position of the first three-position four-way reversing valve can be set to be O-shaped, a port A of the first three-position four-way reversing valve is connected with an oil outlet of a first high-pressure oil filter, a port B of the first three-position four-way reversing valve is connected with an oil outlet of a first cartridge valve, a port P of the first three-position four-way reversing valve is connected with a fourth overflow valve, a port T of the first three-position four-way reversing valve is connected with a fifth overflow valve, a test bench is further provided with a one-way valve group consisting of a third two-position four-way reversing valve, a second cover plate and a third cartridge valve, an oil outlet of the first cartridge valve is connected with an oil inlet of the third cartridge valve, an oil outlet of the third cartridge valve is connected with a first flowmeter, the second cover plate, the test bench is characterized in that an A port of the third two-position four-way reversing valve is connected with an oil outlet of a first high-pressure oil filter, a B port of the third two-position four-way reversing valve is connected with an oil outlet of a third cartridge valve, a pilot pump performance testing system is further arranged on the test bench and comprises a fifth cartridge valve, the fifth cartridge valve is connected with the fourth cartridge valve on an oil inlet, the fourth cartridge valve is connected with an integrated part to be tested on an oil inlet, a second flowmeter is further connected on an oil outlet of the fifth cartridge valve, a second post-filter is connected at an output end of the second flowmeter, an outlet of the second post-filter is connected with a main oil tank, a second overflow valve and a second thermometer are sequentially connected between a Pc port of the integrated part to be tested and the fourth cartridge valve, a second high-pressure thermometer is arranged between the second pressure gauge and the fourth cartridge valve, and a second overflow valve, a second high-pressure oil filter, The second electro-hydraulic proportional valve and a second overflow valve form a parallel loop, the oil outlet of the second electro-hydraulic proportional valve and the oil outlet of the second overflow valve are respectively connected to the oil outlet of a fourth cartridge valve, the fifth cartridge valve is connected with a third cover plate, the third cover plate is connected with a fifth two-position four-way reversing valve, the third cover plate and the fifth cartridge valve form a one-way valve group, the P port of the fifth two-position four-way reversing valve is connected with the control oil port of the fifth cartridge valve, the A port of the fifth two-position four-way reversing valve is connected with the oil outlet of the second high-pressure oil filter, the B port of the fifth two-position four-way reversing valve is connected with the oil outlet of the fifth cartridge valve, the oil outlet of the fourth cartridge valve is connected with the A port of the fourth two-position four-way reversing valve, and the oil outlet of the second high-pressure oil filter is connected with the P, the fourth two-position four-way reversing valve is also connected with a second three-position four-way reversing valve, the middle position of the second three-position four-way reversing valve can be O-shaped, the port B of the second three-position four-way reversing valve is connected with a second high-pressure oil filter, the port P of the second three-position four-way reversing valve is connected with an oil inlet of a sixth overflow valve, the port T of the second three-position four-way reversing valve is connected with an oil inlet of a seventh overflow valve, the port A of the second three-position four-way reversing valve and an oil outlet of the sixth overflow valve are respectively connected with an oil outlet of a fourth cartridge valve, the test bench is also provided with a pilot pump impact test system which comprises the sixth cartridge valve, the oil inlet of the sixth cartridge valve is connected with the oil outlet of the fourth cartridge valve, and the oil outlet of the sixth cartridge valve is connected with an oil outlet of a second flowmeter, the sixth cartridge valve is connected with a fourth cover plate, the fourth cover plate is provided with a sixth two-position four-way reversing valve, a P port of the sixth two-position four-way reversing valve is connected with a control oil port of the sixth cartridge valve, an A port of the sixth two-position four-way reversing valve is connected with an oil outlet of the sixth cartridge valve, a B port of the sixth two-position four-way reversing valve is connected with an oil outlet of the second high-pressure oil filter, the test bench is further provided with an overflow valve performance test system, the overflow valve performance test system comprises a third flow meter connected with an oil inlet of a main oil tank, a throttle valve is connected between the third flow meter and an integrated part to be tested, a third pressure meter is connected between the throttle valve and the integrated part to be tested, the test bench is provided with an overflow valve transient characteristic and durability test system, and the transient characteristic and durability test system comprises, the test bench is characterized in that a variable pump is connected to a port P of the seventh two-position four-way reversing valve, an oil inlet of the variable pump is connected with a main oil tank, a second filter is further arranged between the main oil tank and the variable pump, a port P1 of an integrated part to be tested is connected with a step loading valve, a control port of the step loading valve is connected with a port A of the seventh two-position four-way reversing valve, a fourth pressure gauge is arranged between the seventh two-position four-way reversing valve and the variable pump, a third overflow valve is connected between the seventh two-position four-way reversing valve and the variable pump, a third filter is arranged between the third overflow valve and the variable pump, a temperature control filtering test system is further arranged on the test bench and comprises a second constant delivery pump, a sixth filter is connected to an inlet of the second constant delivery pump, a main oil tank is connected to the sixth filter, and a three-way valve is connected to, the oil outlet of the three-way valve is connected with a first one-way valve, the outlet of the first one-way valve is sequentially connected with a seventh filter and an eighth filter, the inlet and outlet positions of the seventh filter are also connected with a second one-way valve in parallel, the eighth filter is connected with a third one-way valve in parallel, the three-way valve is further connected with a main oil tank through another branch, the outlet of the eighth filter is connected with a heat exchanger, the heat exchanger is provided with an electric control switch valve, the outlet of the heat exchanger is connected with the main oil tank, and the second quantitative pump is further connected with a third motor.
2. A method of operating a test rig for testing pilot pump valve integration as claimed in claim 1, comprising the steps of: (1) the first motor drives the torque meter, the torque meter drives the tachometer, the tachometer drives the input shaft of the tested integrated piece, and a low-pressure area is formed at the oil inlet of the tested integrated piece; (2) under the action of atmospheric pressure, oil is pressed into a first filter from a main oil tank and then enters an electric regulating valve; (3) oil of the electric regulating valve is sucked into an integrated part to be tested and divided into two branches, the first branch passes through a first cartridge valve to a second two-position four-way reversing valve, a first cover plate and a second cartridge valve, finally returns to a main oil tank through a first flowmeter and a first post-filter, and regulates loop pressure through a first electro-hydraulic proportional valve; (4) the second branch oil returns to the main oil tank through a second flow meter and a second post filter through a fourth cartridge valve, a second overflow valve and a fourth two-position four-way reversing valve, and the loop pressure is adjusted through a second electro-hydraulic proportional valve; (5) the pressure difference between an oil inlet and an oil outlet in the tested integrated part is controlled by adjusting a second electro-hydraulic proportional valve and a throttle valve; (6) measuring a system temperature by a first thermometer and a second thermometer; (7) measuring the vacuum degree by adopting a vacuum meter by adjusting the opening of the electric regulating valve; (8) measuring the pressure value of each branch by using a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge and a fifth pressure gauge; (9) and measuring the flow value of each branch by the first flowmeter, the second flowmeter and the third flowmeter respectively.
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| CN201910085483.2A CN109540501B (en) | 2019-01-29 | 2019-01-29 | Test bed for testing pilot pump valve integration and working method thereof |
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| CN201910085483.2A CN109540501B (en) | 2019-01-29 | 2019-01-29 | Test bed for testing pilot pump valve integration and working method thereof |
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