CN112762054A - Comprehensive hydraulic valve performance test system - Google Patents
Comprehensive hydraulic valve performance test system Download PDFInfo
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- CN112762054A CN112762054A CN202110049061.7A CN202110049061A CN112762054A CN 112762054 A CN112762054 A CN 112762054A CN 202110049061 A CN202110049061 A CN 202110049061A CN 112762054 A CN112762054 A CN 112762054A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
Abstract
A comprehensive hydraulic valve performance test system relates to the field of experimental equipment. The invention aims to solve the problems of single performance and small load adjusting range of the existing hydraulic valve testing system. The first proportional overflow valve, the variable hydraulic pump, the second proportional overflow valve, the throttle valve and the hydraulic motor are all communicated with an oil tank, the first proportional overflow valve is communicated with the variable hydraulic pump and the first electromagnetic directional valve at the same time, the first electromagnetic directional valve is communicated with the second electromagnetic directional valve, the second electromagnetic directional valve is communicated with the pressure reducing valve, the second electromagnetic directional valve is communicated with the speed regulating valve, the pressure reducing valve and the speed regulating valve are communicated with a tested valve at the same time, the tested valve is also communicated with a third electromagnetic directional valve, the third electromagnetic directional valve is communicated with a fourth electromagnetic directional valve, the fourth electromagnetic directional valve is communicated with the second proportional overflow valve, the third electromagnetic directional valve is communicated with the hydraulic motor, and the hydraulic motor is connected or disconnected with the flywheel set through an electromagnetic clutch; the two groups of detection groups are respectively used for detecting the temperature, the pressure and the flow of the liquid at two ports of the valve to be detected.
Description
Technical Field
The invention belongs to the field of experimental equipment, and particularly relates to performance testing equipment for a hydraulic valve.
Background
The hydraulic transmission has the advantages of large power density, compact structure, flexible arrangement, high control precision and the like, and is widely applied to various electromechanical systems. The hydraulic valve is an important control element of the hydraulic system, the performance of the hydraulic valve directly influences the use performance of the hydraulic system, and the hydraulic valve is an indispensable element of the hydraulic system. Therefore, the detection of the performance of the hydraulic valve is an indelible link in the design and production of the hydraulic valve, and the design of the hydraulic valve can be guided and the production quality of the hydraulic valve can be controlled by detecting the performance of the hydraulic valve. The general hydraulic valve performance test system has single performance and small load regulation range. Therefore, a novel experimental system with wide performance and large load regulation range is urgently needed.
Disclosure of Invention
The invention provides a hydraulic valve performance comprehensive test system, aiming at solving the problems of single performance and small load regulation range of the existing hydraulic valve performance test system.
A hydraulic valve performance integrated test system comprising: the device comprises a first proportional overflow valve 2, a variable hydraulic pump 4, a first electromagnetic directional valve 7, a second electromagnetic directional valve 8, a pressure reducing valve 9, a speed regulating valve 10, a third electromagnetic directional valve 17, a fourth electromagnetic directional valve 18, a second proportional overflow valve 19, a throttle valve 20, a hydraulic motor 22, an electromagnetic clutch 24, a flywheel set and two detection sets;
one end of the first proportional overflow valve 2, the liquid inlet of the variable hydraulic pump 4, one end of the second proportional overflow valve 19, one end of the throttle valve 20 and one end of the hydraulic motor 22 are all communicated with the oil tank 1,
the other end of the first proportional overflow valve 2 is simultaneously communicated with a liquid outlet of the variable hydraulic pump 4 and one end of a first electromagnetic directional valve 7,
the other end of the first electromagnetic directional valve 7 is communicated with a first port of a second electromagnetic directional valve 8,
a second port of the second electromagnetic directional valve 8 communicates with one end of a pressure reducing valve 9,
a third port of the second electromagnetic directional valve 8 is communicated with one end of a speed regulating valve 10,
the other end of the pressure reducing valve 9 and the other end of the speed regulating valve 10 are simultaneously communicated with one end of the tested valve,
the other end of the tested valve is communicated with the first port of the third electromagnetic directional valve 17,
the second port of the third electromagnetic directional valve 17 communicates with the first port of the fourth electromagnetic directional valve 18,
a second port of the fourth electromagnetic directional valve 18 communicates with the other end of the second proportional relief valve 19,
the third port of the third electromagnetic directional valve 17 communicates with the other end of the hydraulic motor 22,
the hydraulic motor 22 is connected or disconnected with the flywheel set through an electromagnetic clutch 24;
the two detection groups are respectively positioned at two ends of the valve to be detected and are respectively used for detecting the temperature, the pressure and the flow of liquid at two ports of the valve to be detected.
Further, above-mentioned hydraulic valve performance integrated test system still includes: the liquid inlet of the quantitative hydraulic pump 28 is communicated with the oil tank 1, the liquid outlet of the quantitative hydraulic pump 28 is communicated with the liquid inlet of the fifth electromagnetic directional valve 27, two liquid outlets of the fifth electromagnetic directional valve 27 are respectively communicated with the liquid inlet of the cooler 25 and the liquid inlet of the heater 26, and the liquid outlet of the cooler 25 and the liquid outlet of the heater 26 are both communicated with the oil tank 1.
Further, the detection group includes: the device comprises a flow sensor 11, a first temperature sensor 12 and a pressure sensor 13, wherein the flow sensor 11 is used for acquiring the liquid flow at the position, the first temperature sensor 12 is used for acquiring the liquid temperature at the position, and the pressure sensor 13 is used for acquiring the liquid pressure at the position.
Further, a check valve 5 is provided on a path from the variable displacement hydraulic pump 4 to the first electromagnetic directional valve 7.
Further, a muffler 6 is provided on a passage between the variable displacement hydraulic pump 4 and the first electromagnetic directional valve 7.
Furthermore, the hydraulic valve performance comprehensive test system further comprises a variable frequency motor, and the variable frequency motor is used for adjusting the flow regulation range of the variable hydraulic pump 4.
Further, above-mentioned hydraulic valve performance integrated test system still includes: the device comprises a photoelectric coded disc 21 and a torque sensor 23, wherein the photoelectric coded disc 21 is used for collecting the rotation angle and the rotation speed of the hydraulic motor 22, and the torque sensor 23 is used for collecting the output torque of the hydraulic motor 22.
Further, the filter 3 is provided in the passage between the fixed displacement hydraulic pump 28 and the tank 1 and in the passage between the variable displacement hydraulic pump 4 and the tank 1.
Further, above-mentioned hydraulic valve performance integrated test system still includes: the gas-liquid separation device comprises an exhaust valve 16, a liquid level meter 15 and a second temperature sensor 14, wherein the second temperature sensor 14 is used for collecting the oil temperature in the oil tank 1, the liquid level meter 15 is used for calibrating the oil level in the oil tank 1, and the exhaust valve 16 is used for exhausting gas in the oil tank 1.
Further, the first electromagnetic directional valve 7 is a two-position four-way electromagnetic directional valve, the second electromagnetic directional valve 8, the third electromagnetic directional valve 17, the fourth electromagnetic directional valve 18, and the fifth electromagnetic directional valve 27 are all two-position three-way electromagnetic directional valves, and the pressure reducing valve 9 is a constant pressure reducing valve.
The hydraulic valve performance comprehensive test system can detect the flow performance and the internal leakage of the hydraulic valve; the hydraulic valve can be subjected to pressure characteristic experiments; the pressure characteristic and the sensitivity to the load of the hydraulic valve can be detected; the high-low temperature experiment can be carried out on the hydraulic valve, and the pressure-flow characteristic of the hydraulic valve under different temperature conditions is detected; the multifunctional integration is realized. Meanwhile, the load is adjustable, so that the adjustment range of the load is enlarged.
Drawings
FIG. 1 is a schematic diagram of a comprehensive hydraulic valve performance testing system according to the present invention;
FIG. 2 is a schematic structural diagram of a comprehensive hydraulic valve performance testing system according to the present invention;
fig. 3 is a schematic view of the tempering section.
Detailed Description
The first embodiment is as follows: specifically describing the present embodiment with reference to fig. 1 to 3, the system for comprehensively testing the performance of a hydraulic valve according to the present embodiment includes: the device comprises a variable frequency motor, a first proportional overflow valve 2, a variable hydraulic pump 4, a first electromagnetic directional valve 7, a second electromagnetic directional valve 8, a pressure reducing valve 9, a speed regulating valve 10, a third electromagnetic directional valve 17, a fourth electromagnetic directional valve 18, a second proportional overflow valve 19, a throttle valve 20, a photoelectric coded disc 21, a hydraulic motor 22, a torque sensor 23, an electromagnetic clutch 24, a flywheel set, two detection sets and a temperature regulating part.
One end of the first proportional relief valve 2, the liquid inlet of the variable hydraulic pump 4, one end of the second proportional relief valve 19, one end of the throttle valve 20 and one end of the hydraulic motor 22 are all communicated with the oil tank 1 storing hydraulic oil.
The other end of the first proportional overflow valve 2 is communicated with a liquid outlet of the variable hydraulic pump 4 and one end of a first electromagnetic directional valve 7, the other end of the first electromagnetic directional valve 7 is communicated with a first port of a second electromagnetic directional valve 8, a second port of the second electromagnetic directional valve 8 is communicated with one end of a pressure reducing valve 9, a third port of the second electromagnetic directional valve 8 is communicated with one end of a speed regulating valve 10, the other end of the pressure reducing valve 9 and the other end of the speed regulating valve 10 are communicated with one end of a tested valve at the same time, the other end of the tested valve is communicated with a first port of a third electromagnetic directional valve 17, a second port of the third electromagnetic directional valve 17 is communicated with a first port of a fourth electromagnetic directional valve 18, a second port of the fourth electromagnetic directional valve 18 is communicated with the other end of a second proportional overflow valve 19, a third port of the third electromagnetic directional valve 17 is communicated with the other end of a hydraulic motor 22, the hydraulic motor 22 is connected with a flywheel set through an electromagnetic clutch 24, so that the hydraulic motor 22 and the flywheel set can be used for connection or disconnection thereof by electrical control of the electromagnetic clutch 24.
Two sets of detection groups are located by the survey valve both ends respectively, and the detection group includes: the device comprises a flow sensor 11, a first temperature sensor 12 and a pressure sensor 13, wherein the flow sensor 11 is used for acquiring the liquid flow at the position, the first temperature sensor 12 is used for acquiring the liquid temperature at the position, and the pressure sensor 13 is used for acquiring the liquid pressure at the position.
And a one-way valve 5 is arranged on a passage from the variable hydraulic pump 4 to the first electromagnetic directional valve 7, and the one-way valve 5 is used for preventing hydraulic oil from flowing back to the variable hydraulic pump 4.
A muffler 6 is arranged on a passage between the variable hydraulic pump 4 and the first electromagnetic directional valve 7, and the muffler 6 is used for reducing the pressure and flow pulsation of the hydraulic oil discharged by the variable hydraulic pump 4 so as to reduce the influence caused by the pressure and pulsation during detection.
The variable hydraulic pump 4 is used for providing hydraulic oil, and the variable frequency motor is used for adjusting the flow regulation range of the variable hydraulic pump 4.
The photoelectric coded disc 21 is used for collecting the rotation angle and the rotation speed of the hydraulic motor 22.
The torque sensor 23 is used to collect the output torque of the hydraulic motor 22.
The working method of the hydraulic valve performance comprehensive test system in the embodiment comprises the following steps:
when the first electromagnetic directional valve 7 is powered on, the first electromagnetic directional valve 7 is communicated with the second electromagnetic directional valve 8, and when the first electromagnetic directional valve 7 is powered off, the first electromagnetic directional valve 7 is blocked from the second electromagnetic directional valve 8, so that the hydraulic impact frequency can be simulated by controlling the on-off of the first electromagnetic directional valve 7.
The pressure reducing valve 9 is used for setting the inlet pressure of the tested valve to be a constant value, and the speed regulating valve 10 is used for setting the inlet flow of the tested valve to be a constant value. When the second electromagnetic directional valve 8 is powered off, the second electromagnetic directional valve 8 is communicated with the speed regulating valve 10, and hydraulic oil enters the valve to be tested through the speed regulating valve 10. The characteristics of the valve under test at constant inlet flow can now be detected. When the second electromagnetic directional valve 8 is electrified, the second electromagnetic directional valve 8 is communicated with the pressure reducing valve 9, the inlet of the tested valve has constant pressure, and the characteristic of the tested valve at the constant inlet pressure can be detected. The characteristics in the two cases include the leakage amount in the valve to be tested, the inlet and outlet pressure and the temperature. Specifically, the difference between the flow sensors 11 at both ends of the valve under test can be used to measure the amount of leakage in the valve under test. The first temperature sensor 12 and the pressure sensor 13 can be used to measure the pressure and temperature of the hydraulic oil entering and exiting the valve under test.
When the third electromagnetic directional valve 17 is de-energized and the electromagnetic directional valve 18 is de-energized, the third electromagnetic directional valve 17, the fourth electromagnetic directional valve 18 and the second proportional relief valve 19 are communicated. The second proportional relief valve 19 is communicated with a valve to be measured, and the second proportional relief valve 19 can adjust the back pressure of the valve to be measured. The flow characteristics of the valve under test under different back pressure conditions can now be detected.
When the third electromagnetic directional valve 17 is de-energized and the electromagnetic directional valve 18 is energized, the third electromagnetic directional valve 17, the fourth electromagnetic directional valve 18, and the throttle valve 20 are communicated. The throttle valve 20 is communicated with the tested valve, and the throttle valve 20 can adjust the outlet end flow of the tested valve. The flow characteristics of the valve under test can now be detected under different outlet flow conditions.
When the third electromagnetic directional valve 17 is energized, the valve outlet under test, the third electromagnetic directional valve 17, and the hydraulic motor 22 communicate with each other. The photoelectric code disc 21 is used for measuring the rotation angle and the rotation speed of the hydraulic motor 22, and the torque sensor 23 is used for measuring the output torque of the hydraulic motor 22. When the electromagnetic clutch 24 is powered off, the hydraulic motor 22 is in an idle state, and the pressure-flow characteristic of the measured valve in the idle state can be measured; when the electromagnetic clutch 24 is electrified, the hydraulic motor 22 is connected with the flywheel set, the load of the hydraulic motor 22 can be changed by adjusting the flywheel set, and the pressure-flow characteristic of the tested valve under the influence of the load is further detected.
The temperature adjusting part comprises: an exhaust valve 16, a liquid level meter 15, a second temperature sensor 14, a cooler 25, a heater 26, a constant-volume hydraulic pump 28, and a fifth electromagnetic directional valve 27. A liquid inlet of the quantitative hydraulic pump 28 is communicated with the oil tank 1, a liquid outlet of the quantitative hydraulic pump 28 is communicated with a liquid inlet of the fifth electromagnetic directional valve 27, two liquid outlets of the fifth electromagnetic directional valve 27 are respectively communicated with a liquid inlet of the cooler 25 and a liquid inlet of the heater 26, and a liquid outlet of the cooler 25 and a liquid outlet of the heater 26 are both communicated with the oil tank 1. The second temperature sensor 14 is used for collecting the oil temperature in the oil tank 1, the liquid level meter 15 is used for calibrating the oil level in the oil tank 1, and the exhaust valve 16 is used for exhausting the gas in the oil tank 1.
In the embodiment, high-temperature and low-temperature experiments can be respectively carried out, the quantitative hydraulic pump 28 is used for circulating the hydraulic oil in the oil tank 1, and when the fifth electromagnetic directional valve 27 is powered off, the quantitative hydraulic pump 28 is communicated with the cooler 25, so that the hydraulic oil is cooled; when the fifth electromagnetic directional valve 27 is energized, the fixed-quantity hydraulic pump 28 is communicated with the heater 26, so that the hydraulic oil is heated, that is: the temperature of the oil entering the tested valve is controlled by heating or cooling the hydraulic oil in the oil tank, and finally the function of temperature regulation is realized.
Further, a filter 3 is provided in each of a passage between the fixed displacement hydraulic pump 28 and the tank 1 and a passage between the variable displacement hydraulic pump 4 and the tank 1. The first electromagnetic directional valve 7 is a two-position four-way electromagnetic directional valve, the second electromagnetic directional valve 8, the third electromagnetic directional valve 17, the fourth electromagnetic directional valve 18 and the fifth electromagnetic directional valve 27 are all two-position three-way electromagnetic directional valves, and the pressure reducing valve 9 is a constant pressure reducing valve.
Claims (10)
1. A hydraulic valve performance comprehensive test system is characterized by comprising: the device comprises a first proportional overflow valve (2), a variable hydraulic pump (4), a first electromagnetic directional valve (7), a second electromagnetic directional valve (8), a pressure reducing valve (9), a speed regulating valve (10), a third electromagnetic directional valve (17), a fourth electromagnetic directional valve (18), a second proportional overflow valve (19), a throttle valve (20), a hydraulic motor (22), an electromagnetic clutch (24), a flywheel set and two detection sets;
one end of the first proportional overflow valve (2), the liquid inlet of the variable hydraulic pump (4), one end of the second proportional overflow valve (19), one end of the throttle valve (20) and one end of the hydraulic motor (22) are all communicated with the oil tank (1),
the other end of the first proportional overflow valve (2) is simultaneously communicated with a liquid outlet of the variable hydraulic pump (4) and one end of a first electromagnetic directional valve (7),
the other end of the first electromagnetic directional valve (7) is communicated with the first port of the second electromagnetic directional valve (8),
a second port of the second electromagnetic directional valve (8) is communicated with one end of a pressure reducing valve (9),
the third port of the second electromagnetic directional valve (8) is communicated with one end of a speed regulating valve (10),
the other end of the pressure reducing valve (9) and the other end of the speed regulating valve (10) are simultaneously communicated with one end of the tested valve,
the other end of the tested valve is communicated with a first port of a third electromagnetic directional valve (17),
the second port of the third electromagnetic directional valve (17) is communicated with the first port of the fourth electromagnetic directional valve (18),
a second port of the fourth electromagnetic directional valve (18) is communicated with the other end of the second proportional overflow valve (19),
a third port of the third electromagnetic directional valve (17) is communicated with the other end of the hydraulic motor (22),
the hydraulic motor (22) is connected or disconnected with the flywheel set through an electromagnetic clutch (24);
the two detection groups are respectively positioned at two ends of the valve to be detected and are respectively used for detecting the temperature, the pressure and the flow of liquid at two ports of the valve to be detected.
2. The system of claim 1, further comprising: a cooler (25), a heater (26), a quantitative hydraulic pump (28) and a fifth electromagnetic directional valve (27),
the liquid inlet of the quantitative hydraulic pump (28) is communicated with the oil tank (1),
the liquid outlet of the quantitative hydraulic pump (28) is communicated with the liquid inlet of the fifth electromagnetic directional valve (27),
two liquid outlets of the fifth electromagnetic directional valve (27) are respectively communicated with a liquid inlet of the cooler (25) and a liquid inlet of the heater (26),
the liquid outlet of the cooler (25) and the liquid outlet of the heater (26) are both communicated with the oil tank (1).
3. The hydraulic valve performance comprehensive test system according to claim 1 or 2, wherein the detection group comprises: a flow sensor (11), a first temperature sensor (12) and a pressure sensor (13),
the flow sensor (11) is used for acquiring the liquid flow at the position, the first temperature sensor (12) is used for acquiring the liquid temperature at the position, and the pressure sensor (13) is used for acquiring the liquid pressure at the position.
4. The hydraulic valve performance comprehensive testing system according to claim 1 or 2, characterized in that a one-way valve (5) is arranged on a passage from the variable hydraulic pump (4) to the first electromagnetic directional valve (7).
5. The system for comprehensively testing the performance of the hydraulic valve is characterized in that a silencer (6) is arranged on a passage between the variable hydraulic pump (4) and the first electromagnetic directional valve (7).
6. The system for comprehensively testing the performance of the hydraulic valve is characterized by further comprising a variable frequency motor, wherein the variable frequency motor is used for adjusting the flow regulation range of the variable hydraulic pump (4).
7. The hydraulic valve performance comprehensive test system according to claim 1 or 2, characterized by further comprising: a photoelectric code disc (21) and a torque sensor (23),
the photoelectric coded disc (21) is used for collecting the rotation angle and the rotation speed of the hydraulic motor (22),
the torque sensor (23) is used for collecting the output torque of the hydraulic motor (22).
8. The hydraulic valve performance comprehensive test system according to claim 2, wherein a filter (3) is arranged on a passage between the quantitative hydraulic pump (28) and the oil tank (1) and a passage between the variable hydraulic pump (4) and the oil tank (1).
9. The system for comprehensively testing the performance of the hydraulic valve according to claim 2 or 8, characterized by further comprising: an exhaust valve (16), a liquid level meter (15) and a second temperature sensor (14),
the second temperature sensor (14) is used for collecting the temperature of oil in the oil tank (1),
the liquid level meter (15) is used for calibrating the liquid level of oil in the oil tank (1),
the exhaust valve (16) is used for exhausting gas in the oil tank (1).
10. The hydraulic valve performance comprehensive test system according to claim 2 or 8, characterized in that the first electromagnetic directional valve (7) is a two-position four-way electromagnetic directional valve,
the second electromagnetic directional valve (8), the third electromagnetic directional valve (17), the fourth electromagnetic directional valve (18) and the fifth electromagnetic directional valve (27) are all two-position three-way electromagnetic directional valves,
the pressure reducing valve (9) is a constant-value pressure reducing valve.
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| CN202110049061.7A CN112762054B (en) | 2021-01-14 | 2021-01-14 | Comprehensive hydraulic valve performance test system |
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| CN202110049061.7A CN112762054B (en) | 2021-01-14 | 2021-01-14 | Comprehensive hydraulic valve performance test system |
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|---|---|---|---|---|
| CN114623125A (en) * | 2022-03-25 | 2022-06-14 | 哈尔滨工业大学 | High-speed switch valve performance test system |
| CN116164012A (en) * | 2023-02-21 | 2023-05-26 | 东北林业大学 | Hydraulic overflow valve test system |
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