CN112160951B - Test system of hydraulic valve - Google Patents

Test system of hydraulic valve Download PDF

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Publication number
CN112160951B
CN112160951B CN202010601042.6A CN202010601042A CN112160951B CN 112160951 B CN112160951 B CN 112160951B CN 202010601042 A CN202010601042 A CN 202010601042A CN 112160951 B CN112160951 B CN 112160951B
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valve
oil port
pressure control
communicated
port
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CN112160951A (en
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叶建
方敏
汤波
刘杰
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Wuhan Marine Machinery Plant Co Ltd
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Wuhan Marine Machinery Plant Co Ltd
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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
    • F15B19/007—Simulation or modelling
    • 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
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • 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
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The present disclosure provides a test system for a hydraulic valve, comprising: the device comprises a first test module, a pump set module and an oil tank. The first test module includes: the pressure control valve behind the first valve is connected between pump package module and first test pipeline, the pressure control valve is connected between first test pipeline and second test pipeline before the first valve, second test pipeline and oil tank intercommunication, the second switch valve is connected between first test pipeline and second test pipeline, the pressure control valve behind the first valve is connected between third test pipeline and fourth test pipeline, first test pipeline, the second test pipeline, third test pipeline and fourth test pipeline all are equipped with the test interface. The hydraulic valve testing device can be suitable for various hydraulic valves of different types and tests of different pressure ranges and flow ranges of the hydraulic valves.

Description

Test system of hydraulic valve
Technical Field
The disclosure relates to the technical field of hydraulic pressure, in particular to a test system of a hydraulic valve.
Background
Hydraulic valves are an important component of hydraulic systems and typically include pressure control valves, flow control valves, and directional control valves. All hydraulic valves need to be subjected to function and performance tests when leaving a factory, and test items of the hydraulic valve tests comprise pressure tests and flow tests.
However, the hydraulic valve test device in the related art is only applicable to the same type of hydraulic valves. For example, a test device suitable for use with a flow control valve cannot be used to test a directional control valve. And the pressure and flow span of hydraulic valves of different hydraulic systems are often very large, so that the applicability of the hydraulic valve test device in the related technology is low.
Disclosure of Invention
The embodiment of the disclosure provides a test system of a hydraulic valve, which can be suitable for hydraulic valves of various different types, and can test the hydraulic valve in different pressure ranges and flow ranges, so that the applicability of the test system is improved. The technical scheme is as follows:
the embodiment of the present disclosure provides a test system of hydraulic valve, the test system includes: first test module, pump package module and oil tank, first test module includes: the first switch valve, the first valve front pressure control valve, the second switch valve and the first valve rear pressure control valve are respectively provided with a first oil port, a second oil port and a control unit, the first oil port of the first switch valve is communicated with the pump set module, the second oil port of the first switch valve is communicated with one end of the first test pipeline, the other end of the first test pipeline is provided with a first test interface, the control unit of the first switch valve selectively controls the first oil port of the first switch valve to be communicated or disconnected with the second oil port of the first switch valve, and the first oil port of the first valve front pressure control valve is connected to the first test pipeline, a second oil port of the first pre-valve pressure control valve is communicated with one end of a second test pipeline, a second test interface is arranged at the other end of the second test pipeline, one end of the second test pipeline is communicated with the oil tank, a control unit of the first pre-valve pressure control valve is used for controlling the opening pressure of the first pre-valve pressure control valve, when the pressure value at the first oil port of the first pre-valve pressure control valve is not less than the opening pressure of the first pre-valve pressure control valve, the first oil port of the first pre-valve pressure control valve is communicated with the second oil port of the first pre-valve pressure control valve, the first oil port of the second switch valve is connected to the first test pipeline, the second oil port of the second switch valve is connected to the second test pipeline, and the control unit of the second switch valve selectively controls the connection of the first oil port of the second switch valve and the second oil port of the second switch valve The rear pressure control valve is opened or closed, a first oil port of the rear pressure control valve is communicated with one end of a third test pipeline, a third test interface is arranged at the other end of the third test pipeline, a second oil port of the rear pressure control valve is communicated with one end of a fourth test pipeline, a fourth test interface is arranged at the other end of the fourth test pipeline, a control unit of the rear pressure control valve is used for controlling the opening pressure of the rear pressure control valve, when the pressure value at the first oil port of the rear pressure control valve is not less than the opening pressure of the rear pressure control valve, the first oil port of the rear pressure control valve is communicated with the second oil port of the rear pressure control valve, one end of the first test pipeline, one end of the third test pipeline and one end of the fourth test pipeline are all provided with pressure sensors, and one end of the second test pipeline is provided with a flow sensor.
In an implementation manner of the embodiment of the present disclosure, the testing system further includes a second testing module, where the second testing module includes: the third switch valve, the fourth switch valve, the second pre-valve pressure control valve, the second post-valve pressure control valve, a fifth test pipeline and a sixth test pipeline, wherein the third switch valve, the fourth switch valve, the second pre-valve pressure control valve and the second post-valve pressure control valve are all provided with a first oil port, a second oil port and a control unit, the first oil port of the third switch valve is communicated with the pump set module, the second oil port of the third switch valve is communicated with one end of the fifth test pipeline, the other end of the fifth test pipeline is provided with a fifth test interface, the control unit of the third switch valve selectively controls the first oil port of the third switch valve to be communicated with or disconnected from the second oil port of the third switch valve, and the first oil port of the second pre-valve pressure control valve is connected to the fifth test pipeline, the second oil port of the second pre-valve pressure control valve is communicated with the oil tank, the control unit of the second pre-valve pressure control valve is used for controlling the opening pressure of the second pre-valve pressure control valve, when the pressure value at the first oil port of the second pre-valve pressure control valve is not less than the opening pressure of the second pre-valve pressure control valve, the first oil port of the second pre-valve pressure control valve is communicated with the second oil port of the second pre-valve pressure control valve, the first oil port of the fourth switch valve is connected to the fifth test pipeline, the second oil port of the fourth switch valve is communicated with the oil tank, the control unit of the fourth switch valve selectively controls the communication or disconnection of the first oil port of the fourth switch valve and the second oil port of the fourth switch valve, and the first oil port of the second post-valve pressure control valve is communicated with one end of the sixth test pipeline, the other end of the sixth test pipeline is provided with a sixth test interface, a second oil port of the second post-valve pressure control valve is communicated with the oil tank, a control unit of the second post-valve pressure control valve is used for controlling the opening pressure of the second post-valve pressure control valve, when the pressure value at the first oil port of the second post-valve pressure control valve is not less than the opening pressure of the second post-valve pressure control valve, the first oil port of the second post-valve pressure control valve is communicated with the second oil port of the second post-valve pressure control valve, one end of the fifth test pipeline and one end of the sixth test pipeline are both provided with pressure sensors, and the second oil port of the second post-valve pressure control valve is provided with a flow sensor.
In another implementation manner of the embodiment of the present disclosure, the pump unit module includes a first pump unit and a second pump unit, the first pump unit is communicated with the first oil port of the third switch valve, the second pump unit is communicated with one end of the fifth test pipeline, and the second pump unit has a pumping pressure different from that of the first pump unit.
In another implementation manner of the embodiment of the present disclosure, the testing system further includes a third testing module, where the third testing module includes: the fifth switch valve, the sixth switch valve, the front third valve pressure control valve, the rear third valve pressure control valve, a seventh test pipeline and an eighth test pipeline, wherein the fifth switch valve, the sixth switch valve, the front third valve pressure control valve and the rear third valve pressure control valve are all provided with a first oil port, a second oil port and a control unit, the first oil port of the fifth switch valve is communicated with the pump set module, the second oil port of the fifth switch valve is communicated with one end of the seventh test pipeline, the other end of the seventh test pipeline is provided with a seventh test interface, the control unit of the fifth switch valve selectively controls the first oil port of the fifth switch valve to be communicated or disconnected with the second oil port of the fifth switch valve, and the first oil port of the front third valve pressure control valve is connected to the seventh test pipeline, the second oil port of the third pre-valve pressure control valve is communicated with the oil tank, the control unit of the third pre-valve pressure control valve is used for controlling the opening pressure of the third pre-valve pressure control valve, when the pressure value at the first oil port of the third pre-valve pressure control valve is not less than the opening pressure of the third pre-valve pressure control valve, the first oil port of the third pre-valve pressure control valve is communicated with the second oil port of the third pre-valve pressure control valve, the first oil port of the sixth switch valve is connected to the seventh test pipeline, the second oil port of the sixth switch valve is communicated with the oil tank, the control unit of the sixth switch valve selectively controls the communication or disconnection between the first oil port of the sixth switch valve and the second oil port of the sixth switch valve, and the first oil port of the third post-valve pressure control valve is communicated with one end of the eighth test pipeline, the other end of the eighth test pipeline is provided with an eighth test interface, a second oil port of the third valve rear pressure control valve is communicated with the oil tank, a control unit of the third post-valve pressure control valve is configured to control an opening pressure of the third post-valve pressure control valve, when the pressure value at the first oil port of the third post-valve pressure control valve is not less than the opening pressure of the third post-valve pressure control valve, the first oil port of the third rear valve pressure control valve is communicated with the second oil port of the third rear valve pressure control valve, one end of the sixth test pipeline and one end of the seventh test pipeline are both provided with a pressure sensor, and a flow sensor is arranged at a second oil port of the pressure control valve behind the third valve, and the flow test range of the flow sensor of the third test module is larger than that of the flow sensor of the first test module.
In another implementation manner of the embodiment of the disclosure, each of the first switch valve, the third switch valve and the fifth switch valve includes a first valve body and a first electromagnetic directional valve, the first valve body has a first oil port, a second oil port and a control port, the first electromagnetic directional valve has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port of the first electromagnetic directional valve is communicated with the control port of the first valve body, the second oil port of the first electromagnetic directional valve is blocked, the third oil port of the first electromagnetic directional valve is communicated with the first oil port of the first valve body, the fourth oil port of the first valve body is communicated with the oil tank, the first electromagnetic directional valve has a first state and a second state, when the first electromagnetic directional valve is in the first state, the first oil port of the first electromagnetic directional valve is communicated with the third oil port of the first electromagnetic directional valve, the second oil port of the first electromagnetic directional valve is communicated with the fourth oil port of the first electromagnetic directional valve, when the first electromagnetic directional valve is in the second state, the first oil port of the first electromagnetic directional valve is communicated with the fourth oil port of the first electromagnetic directional valve, and the second oil port of the first electromagnetic directional valve is communicated with the third oil port of the first electromagnetic directional valve.
In another implementation manner of the embodiment of the disclosure, the second switch valve, the fourth switch valve and the sixth switch valve each include a second valve body and a second electromagnetic directional valve, the second valve body has a first oil port, a second oil port and a control port, the second electromagnetic directional valve has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port of the second electromagnetic directional valve is communicated with the control port of the second valve body, the second oil port of the second electromagnetic directional valve is blocked, the third oil port of the second electromagnetic directional valve is communicated with the first oil port of the second valve body, the fourth oil port of the second valve body is communicated with the second oil port of the second valve body, the second electromagnetic directional valve has a first state and a second state, and when the second electromagnetic directional valve is in the first state, the first oil port of the second electromagnetic directional valve is communicated with the third oil port of the second electromagnetic directional valve, the second oil port of the second electromagnetic directional valve is communicated with the fourth oil port of the second electromagnetic directional valve, when the second electromagnetic directional valve is in the second state, the first oil port of the second electromagnetic directional valve is communicated with the fourth oil port of the second electromagnetic directional valve, and the second oil port of the second electromagnetic directional valve is communicated with the third oil port of the second electromagnetic directional valve.
In another implementation manner of the embodiment of the present disclosure, each of the first pre-valve pressure control valve, the second pre-valve pressure control valve, and the third pre-valve pressure control valve includes a third valve body and a first proportional overflow valve, the third valve body has a first oil port, a second oil port, and a control port, the first proportional overflow valve has a first oil port and a second oil port, the first oil port of the first proportional overflow valve is communicated with the control port of the third valve body, and the second oil port of the first proportional overflow valve is communicated with the second oil port of the third valve body.
In another implementation manner of the disclosed embodiment, the first post-valve pressure control valve includes a fourth valve body, a fifth valve body, a second proportional overflow valve and a third proportional overflow valve, the fourth valve body and the fifth valve body each have a first oil port, a second oil port and a control port, the second proportional overflow valve and the third proportional overflow valve each have a first oil port and a second oil port, the first oil port of the fourth valve body is communicated with the second oil port of the fifth valve body, the second oil port of the fourth valve body is communicated with the first oil port of the fifth valve body, the first oil port of the second proportional overflow valve is communicated with the control port of the fourth valve body, the second oil port of the second proportional overflow valve is communicated with the first oil port of the fifth valve body, the first oil port of the third proportional overflow valve is communicated with the control port of the fifth valve body, and a second oil port of the third proportional overflow valve is communicated with a first oil port of the fourth valve body.
In another implementation manner of the embodiment of the disclosure, the first valve back pressure control valve further includes a first check valve and a second check valve, a second oil port of the third proportional overflow valve and a second oil port of the fifth valve body are both communicated with the oil inlet of the first check valve, an oil outlet of the first check valve is communicated with a first oil port of the fourth valve body, a second oil port of the second proportional overflow valve and a second oil port of the fourth valve body are both communicated with the oil inlet of the second check valve, and an oil outlet of the second check valve is communicated with a first oil port of the fifth valve body.
In another implementation manner of the embodiment of the present disclosure, the second post-valve pressure control valve and the third post-valve pressure control valve each include a sixth valve body and a fourth proportional overflow valve, the sixth valve body has a first oil port, a second oil port and a control port, the fourth proportional overflow valve has a first oil port and a second oil port, the first oil port of the fourth proportional overflow valve is communicated with the control port of the sixth valve body, and the second oil port of the fourth proportional overflow valve and the second oil port of the sixth valve body are communicated with the oil tank.
The beneficial effects brought by the technical scheme provided by the embodiment of the disclosure at least comprise:
when testing the hydrovalve through the test system of hydrovalve that this disclosed embodiment provided, at first, confirm that the hydrovalve that waits to be tested is the valve of which kind, if the hydrovalve that waits to be tested is pressure control valve, flow control valve this kind of hydrovalve that has two hydraulic fluid ports, then adopt the oil inlet of first test interface and hydrovalve to communicate, adopt the oil-out intercommunication of third test interface and hydrovalve, fourth test interface and second test interface directly adopt the pipeline short circuit together to flow back fluid to the oil tank from the second test pipeline. If the hydraulic valve to be tested is a hydraulic valve which is a directional control valve and is generally provided with four oil ports, a first test interface, a second test interface, a third test interface and a fourth test interface are respectively communicated with four different interfaces of the hydraulic valve, so that oil can enter each oil port of the hydraulic valve during testing, and the hydraulic valve is tested.
The first switch valve can control the first oil port and the second oil port of the first switch valve to be communicated or disconnected through the control unit of the first switch valve, and the second oil port of the first switch valve is communicated with one end of the first test pipeline, so that whether oil pumped by the pump set module can enter the first test pipeline through the first switch valve or not can be controlled. Therefore, oil pumped from the pumping assembly flows back to the oil tank along the first test pipeline, the third test pipeline and the fourth test pipeline finally, and the purpose of testing the hydraulic valve connected in the test pipeline is achieved. The test system provided by the embodiment of the disclosure can be suitable for hydraulic valves of different types, and is high in applicability.
Then, in the test process, the oil pressure on the first test pipeline can be adjusted by controlling the control unit of the pressure control valve before the first valve, so that the aim of adjusting the oil pressure before the oil enters the hydraulic valve is fulfilled, namely the oil pressure at the position of an oil inlet of the hydraulic valve is adjusted. Meanwhile, the oil pressure on the third test pipeline and the fourth test pipeline can be adjusted by controlling a control unit of the pressure control valve behind the first valve, namely the oil pressure at the position of the oil outlet of the hydraulic valve is adjusted. And the pressure sensors arranged at the first test interface, the third test interface and the fourth test interface can be used for detecting the pressure before the valve of the hydraulic valve to be tested and the pressure after the valve under different pressure environments. The test of different pressure spans of the hydraulic valve is satisfied by adjusting the first pre-valve pressure control valve and the first post-valve pressure control valve. Meanwhile, the flow passing through the hydraulic valve to be tested can be detected by the aid of the flow sensor arranged on the second testing interface, and the flow can be measured by adjusting the discharge capacity of the pump unit module when different flow spans are required to be tested. That is, the test system provided by the embodiment of the disclosure can test the hydraulic valve in different pressure ranges and flow ranges, and the applicability of the test system is improved.
And a second switch valve is further arranged in the test system, the second switch valve can control the connection or disconnection of the first oil port and the second oil port of the second switch valve through a control unit of the second switch valve, and the first oil port and the second oil port of the second switch valve are respectively connected to the first test pipeline and the second test pipeline. The oil in the first test pipeline can be controlled to be directly drained to the second test pipeline at any time through the second switch valve, and the oil flows back to the oil tank. Therefore, the hydraulic pressure of oil entering the hydraulic valve to be tested can be controlled to be suddenly reduced, so that the hydraulic valve can be in a test environment with greatly-changed oil pressure, the dynamic response characteristics of the pressure and the flow of the hydraulic valve can be tested, and the comprehensiveness and the reliability of the hydraulic valve test are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a hydraulic schematic diagram of a test system for a hydraulic valve provided in an embodiment of the present disclosure;
FIG. 2 is a hydraulic schematic diagram of a first test module and a pump set module provided in an embodiment of the present disclosure;
FIG. 3 is a hydraulic schematic diagram of a second test module and a pump set module provided by the embodiments of the present disclosure;
fig. 4 is a hydraulic schematic diagram of a third testing module and a pump group module according to an embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a hydraulic schematic diagram of a test system of a hydraulic valve according to an embodiment of the present disclosure. As shown in fig. 1, the test system includes: a first test module 1, a pump package module 5 and a fuel tank 6.
As shown in fig. 1, the first test module 1 includes: the test device comprises a first switch valve 11, a second switch valve 12, a first pre-valve pressure control valve 13, a first post-valve pressure control valve 14, a first test pipeline 15, a second test pipeline 16, a third test pipeline 17 and a fourth test pipeline 18.
As shown in fig. 1, the first switching valve 11, the first pre-valve pressure control valve 13, the second switching valve 12, and the first post-valve pressure control valve 14 each have a first oil port, a second oil port, and a control unit.
As shown in fig. 1, the first oil port 11a of the first switch valve 11 is communicated with the pump stack module 5, the second oil port 11b of the first switch valve 11 is communicated with one end of the first test pipeline 15, the other end of the first test pipeline 15 is provided with a first test interface a1, and the control unit of the first switch valve 11 selectively controls the first oil port 11a of the first switch valve 11 to be communicated with or disconnected from the second oil port 11b of the first switch valve 11.
As shown in fig. 1, the first port 13a of the first pre-valve pressure control valve 13 is connected to the first test line 15, the second port 13b of the first pre-valve pressure control valve 13 is communicated with one end of the second test line 16, the other end of the second test line 16 is provided with a second test interface a2, one end of the second test line 16 is communicated with the oil tank 6, the control unit of the first pre-valve pressure control valve 13 is configured to control the opening pressure of the first pre-valve pressure control valve 13, and when the pressure value at the first port 13a of the first pre-valve pressure control valve 13 is not less than the opening pressure of the first pre-valve pressure control valve 13, the first port 13a of the first pre-valve pressure control valve 13 is communicated with the second port 13b of the first pre-valve pressure control valve 13.
As shown in fig. 1, the first port 12a of the second switching valve 12 is connected to the first test line 15, the second port 12b of the second switching valve 12 is connected to the second test line 16, and the control unit of the second switching valve 12 selectively controls the connection or disconnection of the first port 12a of the second switching valve 12 and the second port 12b of the second switching valve 12.
As shown in fig. 1, the first port 14a of the first post-valve pressure control valve 14 is communicated with one end of a third test line 17, the other end of the third test line 17 is provided with a third test interface A3, the second port 14b of the first post-valve pressure control valve 14 is communicated with one end of a fourth test line 18, the other end of the fourth test line 18 is provided with a fourth test interface a4, a control unit of the first post-valve pressure control valve 14 is used for controlling the opening pressure of the first post-valve pressure control valve 14, and when the pressure value at the first port 14a of the first post-valve pressure control valve 14 is not less than the opening pressure of the first post-valve pressure control valve 14, the first port 14a of the first post-valve pressure control valve 14 is communicated with the second port 14b of the first post-valve pressure control valve 14.
As shown in fig. 1, one end of the first test line 15, one end of the third test line 17, and one end of the fourth test line 18 are each provided with a pressure sensor 71, and one end of the second test line 16 is provided with a flow sensor 72.
When the hydraulic valve is tested by the test system of the hydraulic valve provided by the embodiment of the disclosure, firstly, the type of the hydraulic valve to be tested is determined, if the hydraulic valve to be tested is a hydraulic valve with two oil ports, such as a pressure control valve and a flow control valve, a first test interface A1 is adopted to be communicated with an oil inlet of the hydraulic valve, a third test interface A3 is adopted to be communicated with an oil outlet of the hydraulic valve, and a fourth test interface A4 and a second test interface A2 are directly connected together in a short circuit mode through a pipeline, so that oil can conveniently flow back to the oil tank 6 from the second test pipeline 16. If the hydraulic valve to be tested is a directional control valve which is a hydraulic valve generally provided with four oil ports, a first testing interface A1, a second testing interface A2, a third testing interface A3 and a fourth testing interface A4 are respectively communicated with four different interfaces of the hydraulic valve, so that oil can enter each oil port of the hydraulic valve during testing, and the hydraulic valve is tested.
The first switch valve 11 can control the first oil port 11a and the second oil port of the first switch valve 11 to be connected or disconnected through the control unit of the first switch valve 11, and the second oil port 11b of the first switch valve 11 is communicated with one end of the first test pipeline 15, so that whether oil pumped by the pump set module 5 can enter the first test pipeline 15 through the first switch valve 11 or not can be controlled. Therefore, oil pumped from the pumping assembly flows back to the oil tank 6 along the first test pipeline 15, the third test pipeline 17 and the fourth test pipeline 18 finally, and the purpose of testing the hydraulic valve connected in the test pipelines is achieved. The test system provided by the embodiment of the disclosure can be suitable for hydraulic valves of different types, and is high in applicability.
Then, in the test process, the oil pressure on the first test pipeline 15 can be adjusted by controlling the control unit of the first pre-valve pressure control valve 13, so that the purpose of adjusting the oil pressure before the oil enters the hydraulic valve, namely, the oil pressure at the oil inlet position of the hydraulic valve is adjusted. Meanwhile, the oil pressure on the third test pipeline 17 and the fourth test pipeline 18, that is, the oil pressure at the oil outlet position of the hydraulic valve, can be adjusted by controlling the control unit of the pressure control valve 14 after the first valve. And the pressure sensor 71 arranged at the positions of the first test interface A1, the third test interface A3 and the fourth test interface A4 can detect the pressure of the hydraulic valve to be tested in front of the valve and the pressure of the hydraulic valve in back of the valve under different pressure environments. I.e. by adjusting the first pre-valve pressure control valve 13 and the first post-valve pressure control valve 14 to meet the test of different pressure spans of the hydraulic valve. Meanwhile, the flow sensor 72 arranged at the second test interface a2 can detect the flow passing through the hydraulic valve to be tested, and when tests with different flow spans are required, the flow can be detected by adjusting the displacement of the pump unit module 5. The test system that this disclosed embodiment provided also can carry out the test of different pressure ranges and flow range to hydraulic valve, improves test system's suitability.
In addition, a second switch valve 12 is further disposed in the test system, the second switch valve 12 can control the connection or disconnection of the first oil port 12a and the second oil port of the second switch valve 12 through a control unit of the second switch valve 12, and the first oil port 12a and the second oil port of the second switch valve 12 are respectively connected to the first test pipeline 15 and the second test pipeline 16. The oil liquid in the first test pipeline 15 can be controlled to be directly drained to the second test pipeline 16 at any time through the second switch valve 12 and then flows back to the oil tank 6. Therefore, the hydraulic pressure of oil entering the hydraulic valve to be tested can be controlled to be suddenly reduced, so that the hydraulic valve can be in a test environment with the oil pressure greatly changed, the dynamic response characteristics of the pressure and the flow of the hydraulic valve can be tested, and the comprehensiveness and the reliability of the test of the hydraulic valve are improved.
As shown in fig. 1, the testing system further includes a second testing module 2, and the second testing module 2 includes: a third on-off valve 21, a fourth on-off valve 22, a second pre-valve pressure control valve 23, a second post-valve pressure control valve 24, a fifth test line 25 and a sixth test line 26.
As shown in fig. 1, each of the third switching valve 21, the fourth switching valve 22, the pre-valve pressure control valve 23, and the post-valve pressure control valve 24 has a first oil port, a second oil port, and a control unit.
As shown in fig. 1, the first oil port 21a of the third on/off valve 21 is communicated with the pump stack module 5, the second oil port 21b of the third on/off valve 21 is communicated with one end of the fifth test line 25, the other end of the fifth test line 25 is provided with a fifth test port a5, the control unit of the third on/off valve 21 selectively controls the first oil port 21a of the third on/off valve 21 to be communicated with or disconnected from the second oil port 21b of the third on/off valve 21,
as shown in fig. 1, the first port 23a of the second pre-valve pressure control valve 23 is connected to the fifth test line 25, the second port 23b of the second pre-valve pressure control valve 23 is communicated with the oil tank 6, the control unit of the second pre-valve pressure control valve 23 is used for controlling the opening pressure of the second pre-valve pressure control valve 23, when the pressure value at the first port 23a of the second pre-valve pressure control valve 23 is not less than the opening pressure of the second pre-valve pressure control valve 23, the first port 23a of the second pre-valve pressure control valve 23 is communicated with the second port 23b of the second pre-valve pressure control valve 23,
as shown in fig. 1, the first port 22a of the fourth switching valve 22 is connected to the fifth test line 25, the second port 22b of the fourth switching valve 22 is communicated with the oil tank 6, the control unit of the fourth switching valve 22 selectively controls the connection or disconnection of the first port 22a of the fourth switching valve 22 and the second port 22b of the fourth switching valve 22,
as shown in fig. 1, the first port 24a of the second post-valve pressure control valve 24 is communicated with one end of a sixth test line 26, the other end of the sixth test line 26 is provided with a sixth test port a6, the second port 24b of the second post-valve pressure control valve 24 is communicated with the oil tank 6, the control unit of the second post-valve pressure control valve 24 is used for controlling the opening pressure of the second post-valve pressure control valve 24, when the pressure value at the first port 24a of the second post-valve pressure control valve 24 is not less than the opening pressure of the second post-valve pressure control valve 24, the first port 24a of the second post-valve pressure control valve 24 is communicated with the second port 24b of the second post-valve pressure control valve 24,
as shown in fig. 1, one end of the fifth test line 25 and one end of the sixth test line 26 are provided with pressure sensors 71, and a flow sensor 72 is provided at the second port 24b of the second post-valve pressure control valve 24.
The second testing module 2 in the disclosed embodiment has a fourth testing line 18 and a fifth testing line 25, so that the second testing module 2 can be used for testing hydraulic valves with two oil ports, such as pressure control valves and flow control valves. In addition, the second testing module 2 can also be used for simulating a low-pressure working environment of the hydraulic valve, for example, a low-pressure pump set is used for pumping low-pressure oil to the second testing module 2, and the first testing module 1 can be used for simulating a high-pressure working environment of the hydraulic valve, for example, a high-pressure pump set is used for pumping high-pressure oil to the first testing module 1. Different test modules are adopted for different test pressures, so that the test pressure of the first test module 1 can be shared, and the reliability is improved.
Similar to the first test module 1, during the test, the oil pressure at the oil inlet position of the hydraulic valve and the oil pressure at the oil outlet position of the hydraulic valve can be adjusted by controlling the pressure control valve 23 before the second valve and the pressure control valve 24 after the second valve. And the pressure sensors 71 arranged on the fourth test interface A4 and the fifth test interface A5 are used for testing different pressure spans of the hydraulic valve. Meanwhile, when tests with different flow spans are required, tests with different flow ranges can be realized by adjusting the displacement of the pump unit module 5 and by means of the flow sensor 72 arranged at the second oil port 24b of the second valve rear pressure control valve 24. In addition, the second testing module 2 can also control the first oil port 22a and the second oil port of the fourth switch valve 22 to be connected or disconnected, so that the hydraulic valve can be in a testing environment with greatly changed oil pressure, and the purpose of testing the dynamic response characteristics of the pressure and the flow of the hydraulic valve is achieved.
As shown in fig. 1, the pump unit module 5 may include a first pump unit 51 and a second pump unit 52, the first pump unit 51 communicating with the first oil port 21a of the third switching valve 21, the second pump unit 52 communicating with one end of the fifth test line 25, the second pump unit 52 having a pumping pressure different from that of the first pump unit 51.
Illustratively, the pumping pressure of the first pump group 51 may range from 0 to 35MPa, and the pumping pressure of the second pump group 52 may range from 0 to 8.5 MPa.
In the above implementation, the first pump group 51 is communicated with the first oil port 21a of the third on/off valve 21, that is, whether the oil in the first pump group 51 can be pumped to the second test module 2 or not can be controlled by the third on/off valve 21. The second pump group 52 is directly connected to the fifth test line 25, that is, during the test of the second test module 2, the oil is mainly pumped by the second pump group 52, and the pumping pressure of the second pump group 52 is lower than that of the first pump group 51, so that the second test module 2 is mainly used for the performance of the hydraulic valve in a low-pressure working environment. Meanwhile, the first pump group 51 can also pump oil to the second test module 2, so that when the first pump group 51 and the second pump group 52 pump oil to the second test module 2 at the same time, the test range of the flow rate can be improved to a greater extent. That is, the second testing module 2 can also test the hydraulic valve in a larger flow range than the first testing module 1.
For example, the pumping flow rate of the first pump group 51 may be 3000L/min, and the pumping flow rate of the second pump group 52 may be 3100L/min, so that the maximum flow rate of the oil may reach 6000L/min when the two pump groups pump the oil to the second testing module 2 in the same direction. In the embodiment of the disclosure, in order to ensure the flow precision, the flow range of the pumped oil can be reasonably controlled to be 2000L/min to 4200L/min. Correspondingly, the first test module 1 can pump oil by the first pump set 51 alone, and the flow range of the pumped oil can be reasonably controlled to be 200L/min to 1000L/min.
As shown in fig. 1, the testing system further includes a third testing module 3, and the third testing module 3 includes: a fifth on-off valve 31, a sixth on-off valve 32, a third pre-valve pressure control valve 33, a third post-valve pressure control valve 34, a seventh test line 35, and an eighth test line 36.
As shown in fig. 1, each of the fifth switching valve 31, the sixth switching valve 32, the pre-third valve pressure control valve 33, and the post-third valve pressure control valve 34 has a first port, a second port, and a control unit.
As shown in fig. 1, the first oil port 31a of the fifth switching valve 31 is communicated with the pump stack module 5, the second oil port 31b of the fifth switching valve 31 is communicated with one end of the seventh test pipeline 35, the other end of the seventh test pipeline 35 is provided with a seventh test interface a7, the control unit of the fifth switching valve 31 selectively controls the first oil port 31a of the fifth switching valve 31 to be communicated with or disconnected from the second oil port 31b of the fifth switching valve 31,
as shown in fig. 1, the first port 33a of the third pre-valve pressure control valve 33 is connected to the seventh test line 35, the second port 33b of the third pre-valve pressure control valve 33 is communicated with the oil tank 6, the control unit of the third pre-valve pressure control valve 33 is configured to control the opening pressure of the third pre-valve pressure control valve 33, when the pressure value at the first port 33a of the third pre-valve pressure control valve 33 is not less than the opening pressure of the third pre-valve pressure control valve 33, the first port 33a of the third pre-valve pressure control valve 33 is communicated with the second port 33b of the third pre-valve pressure control valve 33,
as shown in fig. 1, the first port 32a of the sixth switching valve 32 is connected to the seventh test line 35, the second port 32b of the sixth switching valve 32 is communicated with the oil tank 6, the control unit of the sixth switching valve 32 selectively controls the connection or disconnection of the first port 32a of the sixth switching valve 32 and the second port 32b of the sixth switching valve 32,
as shown in fig. 1, the first port 34a of the third post-valve pressure control valve 34 is communicated with one end of an eighth test line 36, the other end of the eighth test line 36 is provided with an eighth test interface A8, the second port 34b of the third post-valve pressure control valve 34 is communicated with the oil tank 6, the control unit of the third post-valve pressure control valve 34 is configured to control the opening pressure of the third post-valve pressure control valve 34, when the pressure value at the first port 34a of the third post-valve pressure control valve 34 is not less than the opening pressure of the third post-valve pressure control valve 34, the first port 34a of the third post-valve pressure control valve 34 is communicated with the second port 34b of the third post-valve pressure control valve 34,
as shown in fig. 1, one end of the sixth test line 26 and one end of the seventh test line 35 are both provided with a pressure sensor 71, a flow sensor 72 is provided at the second oil port 34b of the third post-valve pressure control valve 34, and a flow test range of the flow sensor 72 of the third test module 3 is greater than that of the flow sensor 72 of the first test module 1.
The third testing module 3 in the disclosed embodiment has the sixth testing line 26 and the seventh testing line 35, so that the third testing module 3 can be used for testing hydraulic valves with two oil ports, such as pressure control valves and flow control valves. In addition, the third testing module 3 can pump high-pressure oil through the first pump set 51 of the pump set module 5, and reasonably control the flow range of the oil pumped to the third testing module 3 to be 1000L/min to 3000L/min, so that the flow range of the oil pumped to the first testing module 1 (200L/min to 1000L/min) is distinguished, the third testing module 3 is specially used for testing the high flow of the hydraulic valve, and the first testing module 1 is used for testing the low flow of the hydraulic valve. Different flow tests adopt different test modules, so that the test pressure of the first test module 1 can be shared, and the reliability is improved. Moreover, since the flow rate is relatively large when the third testing module 3 tests, the flow rate testing range of the flow rate sensor 72 of the third testing module 3 is larger than the flow rate testing range of the flow rate sensor 72 of the first testing module 1, so that the value tested by the flow rate sensor 72 can be in the most accurate range of the flow rate sensor 72, and the accuracy of the flow rate test is improved.
Similar to the first testing module 1, during the test, the oil pressure at the oil inlet position of the hydraulic valve and the oil pressure at the oil outlet position of the hydraulic valve can be adjusted by controlling the third pre-valve pressure control valve 33 and the third post-valve pressure control valve 34. And the pressure sensors 71 arranged on the sixth test interface A6 and the seventh test interface A7 are used for testing different pressure spans of the hydraulic valve. Meanwhile, when tests with different flow spans are required, tests with different flow ranges can be realized by adjusting the displacement of the pump unit module 5 and by means of the flow sensor 72 arranged at the second oil port 34b of the third valve rear pressure control valve 34. In addition, the third testing module 3 can also control the first oil port 32a and the second oil port of the sixth switch valve 32 to be connected or disconnected, so that the hydraulic valve can be in a testing environment with greatly changed oil pressure, and the purpose of testing the dynamic response characteristics of the pressure and the flow of the hydraulic valve is achieved.
Fig. 2 is a hydraulic schematic diagram of a first test module and a pump unit module provided in an embodiment of the present disclosure, fig. 3 is a hydraulic schematic diagram of a second test module and a pump unit module provided in an embodiment of the present disclosure, and fig. 4 is a hydraulic schematic diagram of a third test module and a pump unit module provided in an embodiment of the present disclosure. As shown in fig. 2, 3 and 4, each of the first switch valve 11, the third switch valve 21 and the fifth switch valve 31 includes a first valve body 401 and a first electromagnetic directional valve 402, the first valve body 401 has a first oil port, a second oil port and a control port, the first electromagnetic directional valve 402 has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port 402a of the first electromagnetic directional valve 402 is communicated with the control port 401c of the first valve body 401, the second oil port 402b of the first electromagnetic directional valve 402 is blocked, the third oil port 402c of the first electromagnetic directional valve 402 is communicated with the first oil port 401a of the first valve body 401, and the fourth oil port of the first valve body 401 is communicated with the oil tank 6.
The first electromagnetic directional valve 402 has a first state and a second state, when the first electromagnetic directional valve 402 is in the first state, the first oil port 402a of the first electromagnetic directional valve 402 is communicated with the third oil port 402c of the first electromagnetic directional valve 402, the second oil port 402b of the first electromagnetic directional valve 402 is communicated with the fourth oil port 402d of the first electromagnetic directional valve 402, when the first electromagnetic directional valve 402 is in the second state, the first oil port 402a of the first electromagnetic directional valve 402 is communicated with the fourth oil port 402d of the first electromagnetic directional valve 402, and the second oil port 402b of the first electromagnetic directional valve 402 is communicated with the third oil port 402c of the first electromagnetic directional valve 402.
In the above implementation, the first electromagnetic directional valve 402 is a two-position four-way valve, the first electromagnetic directional valve 402 has an electromagnet, and when the electromagnet is de-energized, the first electromagnetic directional valve 402 is in a first state (see the right position in fig. 2, 3, and 4); when the electromagnet is energized, the first electromagnetic directional valve 402 is in the second state (see the left position in fig. 2, 3, and 4). When the first electromagnetic directional valve 402 is in different positions, different oil ports are communicated or isolated.
Taking the first switch valve 11 as an example, as shown in fig. 2, when the electromagnet of the first electromagnetic directional valve 402 is de-energized, the first oil port 401a of the first valve body 401 of the first switch valve 11 and the third oil port 402c of the first electromagnetic directional valve 402 are communicated, so that when the pump unit module 5 pumps oil, the oil pressure at the first oil port of the first switch valve 11 body and the oil pressure at the third oil port 402c of the first electromagnetic directional valve 402 are the same. The first oil port 402a of the first electromagnetic directional valve 402 and the control port 401c of the first valve body 401 are both the same as the oil pressure at the first oil port 401a of the first valve body 401. Therefore, the oil at the first oil port 401a of the first valve body 401 cannot overcome the pressure of the control port 401c of the first valve body 401 and the spring pressure in the first valve body 401, thereby disconnecting the first oil port 401a of the first valve body 401 and the second oil port 401b of the first valve body 401. Namely, the channel for pumping oil to the first test module 1 by the pump set module 5 is blocked.
When the electromagnet of the first electromagnetic directional valve 402 is energized, the first oil port 401a of the first valve body 401 in the first switch valve 11 is communicated with the third oil port 402c of the first electromagnetic directional valve 402, so that when the pump group module 5 pumps oil, the oil pressure at the first oil port of the first switch valve 11 body and the oil pressure at the third oil port 402c of the first electromagnetic directional valve 402 are the same. And the third port 402c of the first solenoid directional valve 402 is now in communication with the second port 402b of the first solenoid directional valve 402. Therefore, the oil at the first oil port 401a of the first valve body 401 only needs to counterbalance the spring in the first valve body 401, and the first oil port 401a of the first valve body 401 and the second oil port 401b of the first valve body 401 are communicated after the oil pressure at the first oil port 401a of the first valve body 401 exceeds the spring pressure in the first valve body 401. I.e. the passage of the pump set module 5 for pumping oil to the first testing module 1 is opened.
As shown in fig. 2, 3 and 4, each of the second switch valve 12, the fourth switch valve 22 and the sixth switch valve 32 includes a second valve body 403 and a second electromagnetic directional valve 404, the second valve body 403 has a first oil port, a second oil port and a control port, the second electromagnetic directional valve 404 has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port 404a of the second electromagnetic directional valve 404 is communicated with the control port 403c of the second valve body 403, the second oil port 404b of the second electromagnetic directional valve 404 is blocked, the third oil port 404c of the second electromagnetic directional valve 404 is communicated with the first oil port 403a of the second valve body 403, and the fourth oil port 403b of the second valve body 403 is communicated with the second oil port 403b of the second valve body 403.
The second electromagnetic directional valve 404 has a first state and a second state, when the second electromagnetic directional valve 404 is in the first state, the first oil port 404a of the second electromagnetic directional valve 404 is communicated with the third oil port 404c of the second electromagnetic directional valve 404, the second oil port 404b of the second electromagnetic directional valve 404 is communicated with the fourth oil port 404d of the second electromagnetic directional valve 404, when the second electromagnetic directional valve 404 is in the second state, the first oil port 404a of the second electromagnetic directional valve 404 is communicated with the fourth oil port 404d of the second electromagnetic directional valve 404, and the second oil port 404b of the second electromagnetic directional valve 404 is communicated with the third oil port 404c of the second electromagnetic directional valve 404.
In the above implementation, the second electromagnetic directional valve 404 is a two-position four-way valve, the first electromagnetic directional valve 402 has an electromagnet, and when the electromagnet is de-energized, the second electromagnetic directional valve 404 is in the first state (see the right position in fig. 2, 3, and 4); when the electromagnet is energized, the second electromagnetic directional valve 404 is in the second state (see the left position in fig. 2, 3, and 4). When the first electromagnetic directional valve 402 is in different positions, different oil ports are communicated or isolated.
Taking the second on-off valve 12 as an example, as shown in fig. 2, when the electromagnet of the second electromagnetic directional valve 404 is de-energized, the first oil port 403a of the second valve body 403 of the second on-off valve 12 and the third oil port 404c of the second electromagnetic directional valve 404 are communicated, so that when the pump unit module 5 pumps oil, the oil pressure at the first oil port of the second on-off valve 12 body and the oil pressure at the third oil port 404c of the second electromagnetic directional valve 404 are the same. The first oil port 404a of the second electromagnetic directional valve 404 and the control port 403c of the second valve body 403 are both the same as the oil pressure at the first oil port 403a of the second valve body 403. Therefore, the oil at the first oil port 403a of the second valve body 403 cannot overcome the pressure of the control port 403c of the second valve body 403 and the spring pressure inside the second valve body 403, thereby disconnecting the first oil port 403a of the second valve body 403 and the second oil port 403b of the second valve body 403. I.e. to avoid that the oil in the first test line 15 is directly discharged from the second switching valve 12.
When the electromagnet of the second electromagnetic directional valve 404 is energized, the first oil port 403a of the second valve body 403 in the second switch valve 12 is communicated with the third oil port 404c of the second electromagnetic directional valve 404, so that when the pump group module 5 pumps oil, the oil pressure at the first oil port of the second switch valve 12 body is the same as the oil pressure at the third oil port 404c of the second electromagnetic directional valve 404. And the third port 404c of the second solenoid directional valve 404 is now in communication with the second port 404b of the second solenoid directional valve 404. Therefore, the oil at the first oil port 403a of the second valve body 403 only needs to counterbalance the spring in the second valve body 403, and the first oil port 403a of the second valve body 403 and the second oil port 403b of the second valve body 403 are communicated after the oil pressure at the first oil port 403a of the second valve body 403 exceeds the spring pressure in the second valve body 403. I.e. opens the passage between the first test line 15 and the tank 6, so that the oil in the first test line 15 can be directly discharged from the second switching valve 12.
In the above implementation manner, the oil in the first test pipeline 15 can be controlled to be directly drained to the second test pipeline 16 at any time through the second switch valve 12, and then flows back to the oil tank 6. Therefore, the hydraulic pressure of oil entering the hydraulic valve to be tested can be controlled to be suddenly reduced, so that the hydraulic valve can be in a test environment with the oil pressure greatly changed, the dynamic response characteristics of the pressure and the flow of the hydraulic valve can be tested, and the comprehensiveness and the reliability of the hydraulic valve test are improved.
As shown in fig. 2, 3, and 4, each of the first pre-valve pressure control valve 13, the second pre-valve pressure control valve 23, and the third pre-valve pressure control valve 33 includes a third valve body 405 and a first proportional relief valve 406, the third valve body 405 has a first oil port, a second oil port, and a control port, the first proportional relief valve 406 has a first oil port and a second oil port, the first oil port of the first proportional relief valve 406 is communicated with the control port 405c of the third valve body 405, and the second oil port of the first proportional relief valve 406 is communicated with the second oil port 405b of the third valve body 405.
The first proportional relief valve 406 may be an electromagnetic proportional relief valve, which is a valve body that changes the magnitude of the relief pressure by the magnitude of the spring force. The force of the electromagnet in the electromagnetic proportional overflow valve acting on the spring can be adjusted in proportion, so that the purpose of changing the overflow pressure of the electromagnetic proportional overflow valve can be realized by controlling the magnetic strength and weakness of the electromagnet.
In the implementation manner, the first proportional overflow valve 406 communicated with the third valve body 405 is controlled to adjust the oil pressure on the first test pipeline 15, so that the purpose of adjusting the oil pressure before the oil enters the hydraulic valve, that is, the oil pressure at the oil inlet position of the hydraulic valve is adjusted. And the pressure sensor 71 arranged at the positions of the first test interface A1, the third test interface A3 and the fourth test interface A4 can detect the pressure of the hydraulic valve to be tested in front of the valve and the pressure of the hydraulic valve in back of the valve under different pressure environments. I.e. the test of different pressure spans of the hydraulic valve is fulfilled by adjusting the first pre-valve pressure control valve 13.
As shown in fig. 2, 3 and 4, the first post-valve pressure control valve 14 includes a fourth valve body 407, a fifth valve body 408, a second proportional relief valve 409 and a third proportional relief valve 410, the fourth valve body 407 and the fifth valve body 408 each have a first oil port, a second oil port and a control port, the second proportional relief valve 409 and the third proportional relief valve 410 each have a first oil port and a second oil port, the first oil port 407a of the fourth valve body 407 communicates with the second oil port 408b of the fifth valve body 408, the second oil port 407b of the fourth valve body 407 communicates with the first oil port 408a of the fifth valve body 408, the first oil port of the second proportional relief valve 409 communicates with the control port 407c of the fourth valve body 407, the second oil port of the second proportional relief valve 409 communicates with the first oil port 408a of the fifth valve body 408, the first oil port of the third proportional relief valve 410 communicates with the control port 408c of the fifth valve body 408, the second port of the third proportional relief valve 410 communicates with the first port 407a of the fourth valve body 407.
The second proportional overflow valve 409 and the third proportional overflow valve 410 may both be electromagnetic proportional overflow valves, and the purpose of changing the overflow pressure of the electromagnetic proportional overflow valves can be achieved by controlling the magnetic strength of the electromagnets of the electromagnetic proportional overflow valves.
In the above implementation, the fourth valve body 407 and the second proportional relief valve 409 are used in cooperation to limit the oil pressure of the third test pipeline 17; the fifth valve body 408 cooperates with a third proportional relief valve 410 to limit the magnitude of the oil pressure in the fourth test line 18. Therefore, when the hydraulic valve to be tested in the first test module 1 is a directional control valve with four oil ports, the oil pressure at the two oil ports connected with the third test pipeline 17 and the fourth test pipeline 18 in the directional control valve can be limited. To adjust the oil pressure at the outlet port position of the directional control valve. And the pressure sensor 71 arranged at the position of the test interface can be used for detecting the valve back pressure of the hydraulic valve to be tested in different pressure environments. I.e. the testing of different pressure spans of the hydraulic valve can be met by adjusting the first valve rear pressure control valve 14.
Optionally, the first post-valve pressure control valve 14 further includes a first check valve 413 and a second check valve 414, a second oil port 410b of the third proportional relief valve 410 and a second oil port 408b of the fifth valve body 408 are both communicated with an oil inlet of the first check valve 413, an oil outlet of the first check valve 413 is communicated with a first oil port 407a of the fourth valve body 407, a second oil port 409b of the second proportional relief valve 409 and a second oil port 407b of the fourth valve body 407 are both communicated with an oil inlet of the second check valve 414, and an oil outlet of the second check valve 414 is communicated with a first oil port 408a of the fifth valve body 408. The first check valve 413 and the second check valve 414 are arranged to prevent oil from flowing back, so that the reliability of the test system is improved.
As shown in fig. 2, 3, and 4, each of the second post-valve pressure control valve 24 and the third post-valve pressure control valve 34 includes a sixth valve body 411 and a fourth proportional relief valve 412, the sixth valve body 411 has a first port, a second port, and a control port, the fourth proportional relief valve 412 has a first port and a second port, the first port 412a of the fourth proportional relief valve 412 communicates with the control port 411c of the sixth valve body 411, and the second port 412b of the fourth proportional relief valve 412 and the second port 411b of the sixth valve body 411 communicate with the oil tank 6.
The fourth proportional overflow valve 412 may be an electromagnetic proportional overflow valve, and the purpose of changing the overflow pressure of the electromagnetic proportional overflow valve may be achieved by controlling the magnetic strength of the electromagnet of the electromagnetic proportional overflow valve.
In the implementation manner, the fourth proportional relief valve 412 communicated with the sixth valve body 411 is controlled to adjust the oil pressure of the oil outlet position of the hydraulic valve. And the pressure sensor 71 arranged at the position of the test interface can detect the pressure of the hydraulic valve to be tested behind the valve under different pressure environments. That is, the test of different pressure spans of the hydraulic valve can be satisfied by adjusting the post-valve pressure control valve and the third post-valve pressure control valve 34.
In the embodiment of the disclosure, the pressure testing range of the first testing module is 0MPa to 32MPa, and the flow testing range is 200L/min to 1000L/min; the pressure test range of the second test module is 0MPa to 8.5MPa, and the flow test range is 2000L/min to 4200L/min; the pressure test range of the third test module is 0MPa to 32MPa, and the flow test range is 1000L/min to 3000L/min. The test system can test the hydraulic valve in different pressure ranges and flow ranges, and the applicability of the test system is improved.
Although the present disclosure has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure.

Claims (10)

1. A test system for a hydraulic valve, the test system comprising: a first testing module (1), a pump set module (5) and an oil tank (6),
the first test module (1) comprises: the device comprises a first switch valve (11), a second switch valve (12), a first valve front pressure control valve (13), a first valve rear pressure control valve (14), a first test pipeline (15), a second test pipeline (16), a third test pipeline (17) and a fourth test pipeline (18), wherein the first switch valve (11), the first valve front pressure control valve (13), the second switch valve (12) and the first valve rear pressure control valve (14) are respectively provided with a first oil port, a second oil port and a control unit,
a first oil port of the first switch valve (11) is communicated with the pump set module (5), a second oil port of the first switch valve (11) is communicated with one end of the first test pipeline (15), a first test interface is arranged at the other end of the first test pipeline (15), a control unit of the first switch valve (11) selectively controls the first oil port of the first switch valve (11) to be communicated with or disconnected from the second oil port of the first switch valve (11),
a first oil port of the first pre-valve pressure control valve (13) is connected to the first test pipeline (15), a second oil port of the first pre-valve pressure control valve (13) is communicated with one end of the second test pipeline (16), a second test interface is arranged at the other end of the second test pipeline (16), one end of the second test pipeline (16) is communicated with the oil tank (6), a control unit of the first pre-valve pressure control valve (13) is used for controlling the opening pressure of the first pre-valve pressure control valve (13), when the pressure value at the first oil port of the first pre-valve pressure control valve (13) is not less than the opening pressure of the first pre-valve pressure control valve (13), the first oil port of the first pre-valve pressure control valve (13) is communicated with the second oil port of the first pre-valve pressure control valve (13),
a first oil port of the second switch valve (12) is connected to the first test pipeline (15), a second oil port of the second switch valve (12) is connected to the second test pipeline (16), a control unit of the second switch valve (12) selectively controls the connection or disconnection of the first oil port of the second switch valve (12) and the second oil port of the second switch valve (12),
a first oil port of the first post-valve pressure control valve (14) is communicated with one end of a third test pipeline (17), a third test interface is arranged at the other end of the third test pipeline (17), a second oil port of the first post-valve pressure control valve (14) is communicated with one end of a fourth test pipeline (18), a fourth test interface is arranged at the other end of the fourth test pipeline (18), a control unit of the first post-valve pressure control valve (14) is used for controlling the opening pressure of the first post-valve pressure control valve (14), when the pressure value at the first oil port of the first post-valve pressure control valve (14) is not less than the opening pressure of the first post-valve pressure control valve (14), the first oil port of the first post-valve pressure control valve (14) is communicated with the second oil port of the first post-valve pressure control valve (14),
one end of the first testing pipeline (15), one end of the third testing pipeline (17) and one end of the fourth testing pipeline (18) are respectively provided with a pressure sensor (71), and one end of the second testing pipeline (16) is provided with a flow sensor (72).
2. The testing system according to claim 1, characterized in that it further comprises a second testing module (2), said second testing module (2) comprising: a third switch valve (21), a fourth switch valve (22), a second pre-valve pressure control valve (23), a second post-valve pressure control valve (24), a fifth test pipeline (25) and a sixth test pipeline (26),
the third on-off valve (21), the fourth on-off valve (22), the pre-valve pressure control valve (23) and the post-valve pressure control valve (24) are all provided with a first oil port, a second oil port and a control unit,
a first oil port of the third switch valve (21) is communicated with the pump set module (5), a second oil port of the third switch valve (21) is communicated with one end of a fifth test pipeline (25), a fifth test interface is arranged at the other end of the fifth test pipeline (25), a control unit of the third switch valve (21) selectively controls the first oil port of the third switch valve (21) to be communicated with or disconnected from the second oil port of the third switch valve (21),
a first oil port of the second pre-valve pressure control valve (23) is connected to the fifth test pipeline (25), a second oil port of the second pre-valve pressure control valve (23) is communicated with the oil tank (6), a control unit of the second pre-valve pressure control valve (23) is used for controlling the opening pressure of the second pre-valve pressure control valve (23), and when the pressure value at the first oil port of the second pre-valve pressure control valve (23) is not less than the opening pressure of the second pre-valve pressure control valve (23), the first oil port of the second pre-valve pressure control valve (23) is communicated with the second oil port of the second pre-valve pressure control valve (23),
a first oil port of the fourth switch valve (22) is connected to the fifth test pipeline (25), a second oil port of the fourth switch valve (22) is communicated with the oil tank (6), a control unit of the fourth switch valve (22) selectively controls the connection or disconnection of the first oil port of the fourth switch valve (22) and the second oil port of the fourth switch valve (22),
a first oil port of the second post-valve pressure control valve (24) is communicated with one end of a sixth test pipeline (26), a sixth test interface is arranged at the other end of the sixth test pipeline (26), a second oil port of the second post-valve pressure control valve (24) is communicated with the oil tank (6), a control unit of the second post-valve pressure control valve (24) is used for controlling the opening pressure of the second post-valve pressure control valve (24), and when the pressure value at the first oil port of the second post-valve pressure control valve (24) is not less than the opening pressure of the second post-valve pressure control valve (24), the first oil port of the second post-valve pressure control valve (24) is communicated with the second oil port of the second post-valve pressure control valve (24),
and one end of the fifth test pipeline (25) and one end of the sixth test pipeline (26) are both provided with pressure sensors (71), and a flow sensor (72) is arranged at a second oil port of the pressure control valve (24) behind the second valve.
3. Test system according to claim 2, characterized in that the pump group module (5) comprises a first pump group (51) and a second pump group (52), the first pump group (51) communicating with the first oil port of the third on/off valve (21), the second pump group (52) communicating with one end of the fifth test line (25), the second pump group (52) having a different pumping pressure than the first pump group (51).
4. Assay system according to claim 2 or 3, characterized in that it further comprises a third test module (3), said third test module (3) comprising: a fifth switch valve (31), a sixth switch valve (32), a third pre-valve pressure control valve (33), a third post-valve pressure control valve (34), a seventh test pipeline (35) and an eighth test pipeline (36),
the fifth switching valve (31), the sixth switching valve (32), the pre-third valve pressure control valve (33), and the post-third valve pressure control valve (34) each have a first oil port, a second oil port, and a control unit,
a first oil port of the fifth switch valve (31) is communicated with the pump set module (5), a second oil port of the fifth switch valve (31) is communicated with one end of the seventh test pipeline (35), a seventh test interface is arranged at the other end of the seventh test pipeline (35), a control unit of the fifth switch valve (31) selectively controls the first oil port of the fifth switch valve (31) to be communicated or disconnected with the second oil port of the fifth switch valve (31),
a first oil port of the third front pressure control valve (33) is connected to the seventh test pipeline (35), a second oil port of the third front pressure control valve (33) is communicated with the oil tank (6), a control unit of the third front pressure control valve (33) is used for controlling the opening pressure of the third front pressure control valve (33), when the pressure value at the first oil port of the third front pressure control valve (33) is not less than the opening pressure of the third front pressure control valve (33), the first oil port of the third front pressure control valve (33) is communicated with the second oil port of the third front pressure control valve (33),
a first oil port of the sixth switching valve (32) is connected to the seventh test pipeline (35), a second oil port of the sixth switching valve (32) is communicated with the oil tank (6), a control unit of the sixth switching valve (32) selectively controls the connection or disconnection of the first oil port of the sixth switching valve (32) and the second oil port of the sixth switching valve (32),
a first oil port of the third rear valve pressure control valve (34) is communicated with one end of an eighth test pipeline (36), an eighth test interface is arranged at the other end of the eighth test pipeline (36), a second oil port of the third rear valve pressure control valve (34) is communicated with the oil tank (6), a control unit of the third rear valve pressure control valve (34) is used for controlling the opening pressure of the third rear valve pressure control valve (34), when the pressure value at the first oil port of the third rear valve pressure control valve (34) is not less than the opening pressure of the third rear valve pressure control valve (34), the first oil port of the third rear valve pressure control valve (34) is communicated with the second oil port of the third rear valve pressure control valve (34),
one end of the sixth testing pipeline (26) and one end of the seventh testing pipeline (35) are both provided with a pressure sensor (71), a second oil port of the third valve rear pressure control valve (34) is provided with a flow sensor (72), and the flow testing range of the flow sensor (72) of the third testing module (3) is larger than that of the flow sensor (72) of the first testing module (1).
5. The testing system according to claim 4, wherein the first switch valve (11), the third switch valve (21) and the fifth switch valve (31) each comprise a first valve body (401) and a first electromagnetic directional valve (402), the first valve body (401) has a first oil port, a second oil port and a control port, the first electromagnetic directional valve (402) has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port of the first electromagnetic directional valve (402) is communicated with the control port of the first valve body (401), the second oil port of the first electromagnetic directional valve (402) is blocked, the third oil port of the first electromagnetic directional valve (402) is communicated with the first oil port of the first valve body (401), the fourth oil port of the first valve body (401) is communicated with the oil tank (6),
the first electromagnetic directional valve (402) has a first state and a second state, when the first electromagnetic directional valve (402) is in the first state, a first oil port of the first electromagnetic directional valve (402) is communicated with a third oil port of the first electromagnetic directional valve (402), a second oil port of the first electromagnetic directional valve (402) is communicated with a fourth oil port of the first electromagnetic directional valve (402), when the first electromagnetic directional valve (402) is in the second state, the first oil port of the first electromagnetic directional valve (402) is communicated with the fourth oil port of the first electromagnetic directional valve (402), and the second oil port of the first electromagnetic directional valve (402) is communicated with the third oil port of the first electromagnetic directional valve (402).
6. The testing system according to claim 4, wherein the second switch valve (12), the fourth switch valve (22) and the sixth switch valve (32) each comprise a second valve body (403) and a second electromagnetic directional valve (404), the second valve body (403) has a first oil port, a second oil port and a control port, the second electromagnetic directional valve (404) has a first oil port, a second oil port, a third oil port and a fourth oil port, the first oil port of the second electromagnetic directional valve (404) is communicated with the control port of the second valve body (403), the second oil port of the second electromagnetic directional valve (404) is blocked, the third oil port of the second electromagnetic directional valve (404) is communicated with the first oil port of the second valve body (403), the fourth oil port of the second valve body (403) is communicated with the second oil port of the second valve body (403),
the second electromagnetic directional valve (404) has a first state and a second state, when the second electromagnetic directional valve (404) is in the first state, a first oil port of the second electromagnetic directional valve (404) is communicated with a third oil port of the second electromagnetic directional valve (404), a second oil port of the second electromagnetic directional valve (404) is communicated with a fourth oil port of the second electromagnetic directional valve (404), when the second electromagnetic directional valve (404) is in the second state, the first oil port of the second electromagnetic directional valve (404) is communicated with the fourth oil port of the second electromagnetic directional valve (404), and a second oil port of the second electromagnetic directional valve (404) is communicated with the third oil port of the second electromagnetic directional valve (404).
7. The test system according to claim 4, wherein the first pre-valve pressure control valve (13), the second pre-valve pressure control valve (23) and the third pre-valve pressure control valve (33) each comprise a third valve body (405) and a first proportional relief valve (406), the third valve body (405) having a first port, a second port and a control port, the first proportional relief valve (406) having a first port and a second port, the first port of the first proportional relief valve (406) being in communication with the control port of the third valve body (405), the second port of the first proportional relief valve (406) being in communication with the second port of the third valve body (405).
8. Testing system according to claim 4, characterized in that the first post-valve pressure control valve (14) comprises a fourth valve body (407), a fifth valve body (408), a second proportional relief valve (409) and a third proportional relief valve (410),
the fourth valve body (407) and the fifth valve body (408) are provided with a first oil port, a second oil port and a control port, the second proportional overflow valve (409) and the third proportional overflow valve (410) both have a first oil port and a second oil port, a first oil port of the fourth valve body (407) is communicated with a second oil port of the fifth valve body (408), a second oil port of the fourth valve body (407) is communicated with a first oil port of the fifth valve body (408), a first oil port of the second proportional overflow valve (409) is communicated with a control port of the fourth valve body (407), a second oil port of the second proportional overflow valve (409) is communicated with a first oil port of the fifth valve body (408), a first oil port of the third proportional overflow valve (410) is communicated with a control port of the fifth valve body (408), and a second oil port of the third proportional overflow valve (410) is communicated with a first oil port of the fourth valve body (407).
9. The test system according to claim 8, wherein the first post-valve pressure control valve (14) further comprises a first check valve (413) and a second check valve (414), a second oil port of the third proportional overflow valve (410) and a second oil port of the fifth valve body (408) are both communicated with an oil inlet of the first check valve (413), an oil outlet of the first check valve (413) is communicated with a first oil port of the fourth valve body (407), a second oil port of the second proportional overflow valve (409) and a second oil port of the fourth valve body (407) are both communicated with an oil inlet of the second check valve (414), and an oil outlet of the second check valve (414) is communicated with a first oil port of the fifth valve body (408).
10. Testing system according to claim 4, characterized in that the second post-valve pressure control valve (24) and the third post-valve pressure control valve (34) each comprise a sixth valve body (411) and a fourth proportional relief valve (412),
the sixth valve body (411) is provided with a first oil port, a second oil port and a control port, the fourth proportional overflow valve (412) is provided with a first oil port and a second oil port, the first oil port of the fourth proportional overflow valve (412) is communicated with the control port of the sixth valve body (411), and the second oil port of the fourth proportional overflow valve (412) and the second oil port of the sixth valve body (411) are communicated with the oil tank (6).
CN202010601042.6A 2020-06-29 2020-06-29 Test system of hydraulic valve Active CN112160951B (en)

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CN113606206B (en) * 2021-05-26 2022-04-29 广州嘉泰液压机电有限公司 Hydraulic test oil source system

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CN103573753A (en) * 2013-11-05 2014-02-12 中联重科股份有限公司 Transient test loop of hydraulic valve
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CN207583747U (en) * 2017-11-13 2018-07-06 苏州艾风机械有限公司 OCV valve hydraulic oil path test systems

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CN102536942A (en) * 2012-02-13 2012-07-04 中联重科股份有限公司 throttle circuit
CN103573753A (en) * 2013-11-05 2014-02-12 中联重科股份有限公司 Transient test loop of hydraulic valve
CN105298992A (en) * 2015-11-26 2016-02-03 浙江大学 Dynamic property testing system for high-speed switch valve based on digital variable pump pilot regulation and method thereof
CN207583747U (en) * 2017-11-13 2018-07-06 苏州艾风机械有限公司 OCV valve hydraulic oil path test systems
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