CN113323947B - Engineering machinery hydraulic proportional solenoid valve testing device and method - Google Patents
Engineering machinery hydraulic proportional solenoid valve testing device and method Download PDFInfo
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- CN113323947B CN113323947B CN202110620517.0A CN202110620517A CN113323947B CN 113323947 B CN113323947 B CN 113323947B CN 202110620517 A CN202110620517 A CN 202110620517A CN 113323947 B CN113323947 B CN 113323947B
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a testing device and a testing method for a hydraulic proportional electromagnetic valve of engineering machinery, which are used for testing the hydraulic proportional electromagnetic valve. The test hydraulic proportional solenoid valve has various working conditions, and the various working conditions correspond to various working condition parameters; the test device includes: the system comprises an industrial control computer, a driving system, an oil supply system, an oil outlet regulating system, an air supply system and an air outlet treatment system; the industrial control computer is configured to control the oil supply system and the oil outlet regulating system to be switched on, and to switch off the air supply system and the air outlet treatment system, and to control the oil supply system and the oil outlet regulating system to be switched on. The invention realizes the test of the hydraulic proportional solenoid valve with various structures and performances, plays an auxiliary role in the research and development and test of the hydraulic proportional solenoid valve of engineering machinery, accelerates the research and development process, can clean and environment-friendly treat residual test oil remained in the tested proportional solenoid valve after the test, and meets the requirement of low emission.
Description
Technical Field
The invention relates to the technical field of engineering machinery part testing, in particular to a device and a method for testing a hydraulic proportional electromagnetic valve of an engineering machinery.
Background
The engineering hydraulic system is a key component of engineering machinery, along with development and improvement of electronic control application technology, engineering machinery is electronic, the degree of automation is higher and higher, various electric-hydraulic electronic control components are more and more, and the hydraulic proportional electromagnetic valve is one of the key control components. The current technical level of the domestic infrastructure engineering machinery is greatly improved and the market supply and demand are needed, the original hydraulic electric control proportional solenoid valve basically depends on imported foreign advanced countries, a plurality of relevant research and development departments are developed in China, but due to the fact that various parts of the hydraulic electric control proportional solenoid valve are high in technical requirements and high in processing difficulty, performance tests are required after assembly is completed, a test bed capable of performing performance tests on hydraulic proportional solenoid valves with various structures and performances is not available in China at present, the research and development and test of the hydraulic proportional solenoid valves are limited, research and development progress is slowed down, the current test is stopped at the stage of test completion, and test oil remained in the tested proportional solenoid valve after the test is not cleaned or directly recovered, so that great adverse effects on environmental protection are generated.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the device and the method for testing the hydraulic proportional electromagnetic valve of the engineering machinery, which realize the testing of the hydraulic proportional electromagnetic valve with various structures and performances, have auxiliary effects on the research and development and testing of the hydraulic proportional electromagnetic valve of the engineering machinery, accelerate the research and development process, and simultaneously can clean and treat the residual oil remained in the tested proportional electromagnetic valve after the testing, thereby meeting the requirement of low emission.
In order to achieve the technical purpose, the invention adopts the following technical scheme: the hydraulic proportional solenoid valve testing device for engineering machinery is used for testing the hydraulic proportional solenoid valve, wherein the hydraulic proportional solenoid valve is tested to have multiple working conditions, and the multiple working conditions correspond to multiple working condition parameters;
the test device comprises:
the system comprises an industrial control computer, a driving system, an oil supply system, an oil outlet regulating system, an air supply system and an air outlet treatment system;
the industrial control computer is configured to receive the various working condition parameters of the hydraulic proportional solenoid valve, collect performance data of the hydraulic proportional solenoid valve under each working condition, and complete testing of the hydraulic proportional solenoid valve according to the performance data;
The drive system is configured to provide drive voltages and drive currents to different ones of the hydraulic proportioning solenoid valves that operate under various operating conditions;
the oil supply system is configured to supply oil and control the oil inlet pressure of the hydraulic proportional solenoid valve according to the plurality of working condition parameters;
the oil outlet regulating system is configured to control the output oil pressure and the output flow of the hydraulic proportional solenoid valve according to the various working condition parameters;
the air supply system is configured to provide compressed air for cleaning into the hydraulic proportional solenoid valve after testing;
the air outlet treatment system is configured to treat air flowing through the hydraulic proportional solenoid valve;
the industrial control computer is configured to control the oil supply system and the oil outlet regulating system to be turned on, to shut off the air supply system and the air outlet treating system, and to control the air supply system and the air outlet treating system to be turned on, to shut off the oil supply system and the oil outlet regulating system.
Further, the industrial control computer is electrically connected with an electronic power driving plate, a voltage sensor and a current sensor are arranged on the electronic power driving plate, and the industrial control computer collects the driving voltage and the driving current of the hydraulic proportional electromagnetic valve under each working condition through the voltage sensor and the current sensor.
Further, the oil supply system comprises a high-pressure oil pressure transmitter, an oil inlet pressure control valve and an oil supply electromagnetic valve, wherein the oil inlet pressure control valve is used for controlling the oil inlet pressure; the high-pressure oil pressure transmitter collects the oil inlet pressure and sends the oil inlet pressure to the electronic power driving plate, wherein the electronic power driving plate can send the oil inlet pressure to the industrial control computer; the oil supply solenoid valve is switched off or switched on the oil supply system loop.
Further, the oil outlet regulating system comprises a pressure transmitter, a flow transmitter and an electric control proportional flow electromagnetic valve, wherein the pressure transmitter and the flow transmitter respectively acquire the output oil pressure and the output flow and send the output oil pressure and the output flow to the electronic power driving plate, and the electronic power driving plate controls the driving voltage and the driving current according to the electric control proportional flow electromagnetic valve, wherein the electronic power driving plate can send the output oil pressure and the output flow to the industrial control computer.
Further, the air supply system comprises an air supply compressor, an air overflow valve pressure regulator and an air supply pressure transmitter, wherein the air supply compressor provides air inlet pressure for compressed air, the air overflow valve pressure regulator controls the air inlet pressure, the air supply pressure transmitter collects the air inlet pressure and sends the air inlet pressure to the electronic power driving board, and the electronic power driving board can send the air inlet pressure to the industrial control computer.
Further, the gas outlet treatment system comprises a gas outlet electric control stop valve and a gas-oil separator, wherein the gas outlet electric control stop valve can be used for switching on or switching off a circuit of the gas outlet treatment system, and the gas-oil separator can be used for receiving and separating the gas-oil mixture.
Further, the test bench is also included; the test bench is provided with an upper layer and a lower layer; the oil supply system, the oil outlet regulating system, the air supply system and the air outlet treatment system are all arranged on the lower layer; the upper layer is fixed with a base, a mounting module is fixed on the base, and the hydraulic proportional solenoid valve can be mounted on the mounting module; the top of the upper layer is provided with a wind collecting cover, the outer part of the upper layer is provided with an exhaust fan, the wind collecting cover is connected with the exhaust fan, and a gas outlet of the oil-gas separator is connected to the exhaust fan.
A testing method of a hydraulic proportional solenoid valve comprises the following steps:
after the test is started, the hydraulic proportional solenoid valve is installed and fastened on the installation module;
starting test operation, powering on a test device, starting an industrial control computer, initializing working software of the industrial control computer and working software of an electronic power driving plate, selecting a driving working module matched with the hydraulic proportional solenoid valve on the industrial control computer by a test operator through man-machine interaction, inputting various working condition parameters required by the test, setting test oil working temperature, starting a driving system, an oil supply system and an oil outlet regulating system after the test oil temperature reaches the set temperature to enable the hydraulic proportional solenoid valve to enter a specified working condition working state, measuring the oil inlet pressure by the electronic power driving plate through the high-pressure oil pressure transmitter, measuring the output oil pressure by the pressure transmitter, measuring the output flow by the flow transmitter, and controlling the driving current of the electric control proportional flow solenoid valve through a closed loop to enable the output oil pressure and the output flow to meet the current test working condition to obtain a test result;
After the test work is finished, the industrial control computer is called to clear the residual test oil working module of the hydraulic proportional electromagnetic valve, the oil supply electromagnetic valve of the oil supply system loop is automatically cut off, the air supply stop valve of the air supply system loop is connected, the oil outlet stop valve of the oil outlet regulating system loop is cut off, the air outlet electric control stop valve of the air outlet processing system loop is connected, the hydraulic proportional electromagnetic valve is changed into a compressed air passage from an original oil passage, and meanwhile, the electronic power driving plate provides the hydraulic proportional electromagnetic valve with the maximum opening working current, so that the opening of the hydraulic proportional electromagnetic valve is maximum, and the compressed air can quickly take away residual oil;
after the cleaning work is finished, the hydraulic proportional electromagnetic valve and the mounting module are disassembled, the test device is powered off, and the test is finished.
Further, the method also comprises the following substeps: the air supply compressor provides compressed air with certain pressure for the air supply system loop, the air overflow valve pressure regulator controls the air inlet pressure conveyed by the air supply compressor, the air supply pressure transmitter collects the air inlet pressure and sends the air inlet pressure to the electronic power driving board, and the electronic power driving board can send the air inlet pressure to the industrial control computer.
Further, the method also comprises the following substeps: the compressed gas flows through the hydraulic proportional electromagnetic valve to form tested oil-gas mixed gas, the tested oil-gas mixed gas enters the oil-gas separator through the air-out electric control stop valve, the oil-gas separator flows the separated test oil back to the test oil tank, and the separated air is discharged back to the atmosphere through the exhaust fan.
In summary, the present invention achieves the following technical effects:
the invention is used for testing a hydraulic proportional solenoid valve, comprising: the device comprises a driving system, an industrial control computer, an oil supply system and an oil outlet regulating system, wherein the driving system, the industrial control computer, the oil supply system and the oil outlet regulating system are respectively arranged on a test bench of the test device; the driving system is used for outputting driving voltage and driving current which can enable various hydraulic proportional electromagnetic valves to work under various working conditions through an industrial computer and an electronic power driving board; the industrial control computer is used for receiving working condition parameters corresponding to each working condition of the hydraulic proportional electromagnetic valve, collecting performance data of the hydraulic proportional electromagnetic valve under each working condition, and completing the test of the hydraulic proportional electromagnetic valve according to the performance data; the performance data comprise the driving working voltage, working current, input oil pressure, output oil pressure and output flow of the hydraulic proportional electromagnetic valve; the oil supply system is used for controlling the oil inlet pressure of the hydraulic proportional electromagnetic valve according to working condition parameters corresponding to each working condition; the oil outlet regulating system is used for controlling the output flow and the output oil pressure of the hydraulic proportional electromagnetic valve according to the working condition parameters corresponding to each working condition;
The oil supply system of the test device can control the oil inlet pressure according to the working condition parameters of the tested hydraulic proportional electromagnetic valve, the oil outlet regulating system can control the output oil pressure and the output flow of the tested proportional electromagnetic valve according to the working condition parameters of the tested hydraulic proportional electromagnetic valve, and the industrial control computer collects the performance data of the tested hydraulic proportional electromagnetic valve under each working condition and completes the test of the proportional electromagnetic valve according to the performance data; after the hydraulic proportional electromagnetic valve is used for testing, the air supply system supplies compressed air to clean up the test residual oil in the measured proportional electromagnetic valve, the air outlet treatment system separates the oil-gas mixed gas with oil drops and droplets out of the test oil through the oil-gas separator and flows back to the test oil tank, and the filtered air is discharged back to the atmosphere through the air extractor; the test of the hydraulic proportional electromagnetic valve of the engineering machinery with various structures and performances can be realized, the auxiliary effect is realized on the research and the development and the test of various hydraulic proportional electromagnetic valves of the engineering machinery, and the research and development process is accelerated;
according to the invention, the tested test oil can be separated, the separated test oil is recycled, and the separated air is discharged, so that the environment protection is realized.
Drawings
FIG. 1 is a schematic block diagram of a test device for hydraulic proportional solenoid valves of engineering machinery, which is provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a hydraulic system of a hydraulic proportional solenoid valve test device for an engineering machine;
fig. 3 is a structural layout of a hydraulic proportional solenoid valve testing device of engineering machinery.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Examples
A hydraulic proportional solenoid valve testing device of engineering machinery is used for testing a hydraulic proportional solenoid valve 100, wherein the hydraulic proportional solenoid valve 100 is tested to have multiple working conditions, and the multiple working conditions correspond to multiple working condition parameters.
The test device includes: industrial control computer 1, driving system 2, oil supply system 3 and play oil governing system 5, air supply system 4 and give vent to anger processing system 6.
The industrial control computer 1 is configured to receive various working condition parameters of the hydraulic proportional solenoid valve 100, collect performance data of the hydraulic proportional solenoid valve 100 under each working condition, and complete testing of the hydraulic proportional solenoid valve 100 according to the performance data. The industrial control computer 1 is configured to control the oil supply system 3 and the oil outlet regulating system 5 to be turned on, to shut off the air supply system 4 and the air outlet treatment system 6, and to control the air supply system 4 and the air outlet treatment system 6 to be turned on, to shut off the oil supply system 3 and the oil outlet regulating system 5.
When the hydraulic proportional electromagnetic valve 100 is designed, aiming at each working condition, the industrial control computer 1 receives the working condition parameters corresponding to each working condition, controls the hydraulic proportional electromagnetic valve 100 to operate under each working condition parameter, collects the performance data of the hydraulic proportional electromagnetic valve 100 operating under each working condition, judges whether the performance data reach the designed performance, and can finish the test of the hydraulic proportional electromagnetic valve according to the performance data.
In the embodiment of the present application, the performance data includes an oil inlet pressure, an oil outlet flow rate of the hydraulic proportional solenoid valve 100, an operating voltage driving the hydraulic proportional solenoid valve 100, and an operating current. After the performance data are collected, the industrial control computer 1 may also draw the performance data into data curves, such as a voltage-flow curve, a voltage-oil pressure curve, a driving trigger time-flow curve, a driving trigger time-oil pressure curve, etc., which are used to intuitively represent various working performances and dynamic performances of the hydraulic proportional solenoid valve.
The industrial control computer 1 is electrically connected with an electronic power driving board 40, and a voltage sensor (not shown) and a current sensor (not shown) are configured on the electronic power driving board 40, and the industrial control computer 1 collects driving voltages and driving currents of the hydraulic proportional solenoid valve 100 under each working condition through the voltage sensor and the current sensor.
The drive system 2 is configured to provide drive voltages and drive currents to the various hydraulic proportional solenoid valves 100 operating under various operating conditions via the industrial control computer 1 and the electronic power drive board 40.
The drive system includes a computer output board card, an electronic power drive board 40.
In the embodiment of the present application, as shown in fig. 2, which is a schematic flow chart of the whole test, tests of various solenoid valves, such as a proportional pressure regulating solenoid valve 14, a proportional flow solenoid valve 15, and a reversing valve 17, are shown, and all of these solenoid valves belong to the range of the hydraulic proportional solenoid valve 100. The driving system 2 enables the oil pressure of the oil inlet of the measured proportional electromagnetic valve to work in a set working oil pressure state by adjusting a hydraulic overflow valve pressure regulator; the driving system provides working voltage and working current for the electric control proportion electromagnetic flow valve 24 of the oil outlet regulating system 5, so that the oil way system of the whole test stand reaches a standard specified test state; the driving system provides driving voltage and driving current for the measured proportional flow electromagnetic valve 15 to enable the proportional flow electromagnetic valve to work in a set working oil output state; the driving system provides driving voltage and driving current for the measured proportional pressure regulating solenoid valve 14, so that the proportional pressure regulating solenoid valve works in oil outlet pressure states under different test working conditions; the drive system also supplies an operating voltage to the detected reversing valve 17 to enable the detected reversing valve to work normally, and a dynamic performance test is performed. The drive system controls the solenoid valve 14 to apply an operating voltage of 12 volts DC or 24 volts DC, increases or decreases the PWM drive current by 0-100%, and controls the solenoid valve 15 to apply an operating voltage of 12 volts DC or 24 volts DC, increases or decreases the PWM drive current by 0-100%.
The oil supply system 3 is configured to supply oil and control the oil intake pressure of the hydraulic proportional solenoid valve 100 according to various operating condition parameters.
As shown in fig. 2, the oil supply system 3 includes a high-pressure oil pressure transmitter 12, an oil-feed pressure control valve 35, and an oil supply solenoid valve 13, the oil-feed pressure control valve 35 being for controlling the oil-feed pressure; the high-pressure oil pressure transmitter 12 collects oil inlet pressure and sends the oil inlet pressure to the electronic power driving plate 40, wherein the electronic power driving plate 40 can send the oil inlet pressure to the industrial control computer 1; the oil supply solenoid valve 13 shuts off or switches on the circuit of the oil supply system 3.
In the embodiment of the present application, the oil supply system 3 adjusts the hydraulic relief valve pressure regulator according to the working condition parameters corresponding to each working condition of the measured hydraulic proportional solenoid valve 100 sent by the industrial control computer 1, and controls the oil inlet pressure of the measured hydraulic proportional solenoid valve 100 to be matched with the oil inlet pressure in the working condition parameters corresponding to each working condition.
The oil supply system 3 further comprises a test oil tank 30, an automatic temperature controller 31, a test oil filter 32 and an electric hydraulic pump 33, wherein the electric hydraulic pump 33 pumps out the test oil in the test oil tank 30, the test oil is regulated to a proper temperature through the automatic temperature controller 31, the test oil temperature is ensured to be at the test oil temperature specified by the standard, the test oil is filtered into clean test oil through the test oil filter 32, and the clean test oil is supplied to the hydraulic proportional electromagnetic valve 100. The automatic temperature controller 31 is a temperature control system for professional production, and can set the test oil temperature at a test-specified oil temperature.
The oil supply system 3 further comprises an energy accumulator 11, and forms a pressure regulation and pressure acquisition loop of the oil supply system 3 together with the high-pressure oil pressure transmitter 12 and the oil inlet pressure control valve 35, so that the oil inlet pressure can be timely regulated and acquired.
The oil supply system 3 further includes a first pipe 34 and a second pipe 16, the accumulator 11, the high-pressure oil pressure transmitter 12, and the oil-in-pressure control valve 35 are installed on the first pipe 34, and the second pipe 16 inputs the test oil, which has been adjusted in the overpressure, into the hydraulic proportional solenoid valve 100.
The oil supply system is a test oil supply system for supplying oil to the hydraulic proportional solenoid valve 100, the oil supply pressure is regulated by an oil supply pressure control valve 35 to be the oil supply pressure regulated in the working condition parameters corresponding to each working condition of the measured hydraulic proportional solenoid valve 100, and an oil supply pressure transmitter 12 is used for monitoring the oil supply pressure of the hydraulic proportional solenoid valve.
According to the testing device for the hydraulic proportional solenoid valve, the industrial control computer 1 controls the electric hydraulic pump 33 to pump oil, the oil inlet pressure transmitter 12 monitors the oil inlet pressure, and the oil inlet pressure control valve 35 is adjusted to meet the oil inlet pressure requirements of the hydraulic proportional solenoid valve in working condition parameters under different working conditions. The working flow of the whole test bed is controlled by an electrically controlled hydraulic proportional flow solenoid valve 24 in the control system.
The oil delivery regulation system 5 is configured to control the output oil pressure and the output flow rate of the hydraulic proportional solenoid valve 100 in accordance with various operating condition parameters.
The oil outlet regulating system 5 comprises a pressure transmitter 22, a flow transmitter 23 and an electric control proportional flow solenoid valve 24, wherein the pressure transmitter 22 and the flow transmitter 23 respectively acquire output oil pressure and output flow and send the output oil pressure and the output flow to an electronic power driving board 40, and the electronic power driving board 40 controls driving voltage and driving current according to the electric control proportional flow solenoid valve 24, wherein the electronic power driving board 40 can send the output oil pressure and the output flow to the industrial control computer 1. The measured proportional pressure regulating solenoid valve 14, proportional flow solenoid valve 15, reversing valve 17 are disposed in a high pressure oil outlet pipe 20 and an oil return pipe 19 in the high pressure oil path for discharging the tested oil.
The proportional pressure regulating solenoid valve 14 is configured to set a corresponding control voltage and current (PWM pulse width control on/off time) according to a working condition parameter corresponding to each working condition, and adjust an effective stroke of a plunger of the hydraulic pressure proportional solenoid valve by the corresponding on/off time to control the test oil path to output an oil pressure; the proportional flow solenoid valve 15 is used for setting corresponding control voltage and current (PWM pulse width control on-off time) according to the working condition parameters corresponding to each working condition, and adjusting the effective stroke of the plunger of the hydraulic proportional flow solenoid valve through the corresponding on-off time to control the output oil flow of the test oil path.
The electronic driving board 40 is electrically connected with the proportional pressure-regulating electromagnetic valve 14 and the proportional flow electromagnetic valve 15, and is used for respectively outputting working voltage and working current according to working condition parameters corresponding to each working condition to respectively control the proportional pressure-regulating electromagnetic valve 14 and the proportional flow electromagnetic valve 15, so as to realize control of output oil pressure and output flow; the electronic drive plate 40 is connected to the reversing valve 17 to operate in a test mode.
The electronic driving plate 40 is also connected with the high-pressure oil pressure transmitter 12 to collect input oil pressure; the output oil pressure and output flow under each working condition are collected by being connected with an oil outlet pressure transmitter 22 and a flow meter 23, and the collected input oil pressure and output flow under each working condition are sent to the industrial control computer 1.
The industrial control computer 1 and the electronic driving board 40 provide driving voltage and driving current for the electric control proportional flow electromagnetic valve 24, and control the opening of the electric control proportional flow electromagnetic valve 24 according to the target working condition downloaded by the industrial control computer 1, and control the total flow of the test bed. The comparative example pressure regulating solenoid valve 14 and the proportional flow solenoid valve 15 provide driving voltage and driving current, output oil pressure and output flow are controlled according to test working conditions to perform closed loop control, the output oil pressure and the output flow are collected through the oil inlet pressure transmitter 12, the oil outlet pressure transmitter 22 and the flow meter 23, the industrial control computer 1 drives a voltage sensor and a driving current sensor through the electronic driving plate 40, and performance data of the measured proportional solenoid valve under different working conditions can be tested.
In this embodiment of the present application, the oil outlet adjustment system 5 receives the working condition parameters corresponding to each working condition of the hydraulic proportional solenoid valve that the industrial control computer 1 sends, and when the output flow and the output oil pressure of the hydraulic proportional solenoid valve need to be controlled, controls the output flow and the output oil pressure to be matched with the output flow and the output oil pressure in the working condition parameters corresponding to each working condition.
The oil outlet regulating system 5 is matched with the oil supply system 3, the oil supply system 3 inputs test oil into a tested piece, and the oil outlet regulating system 5 discharges the tested test oil to realize testing.
After the test is completed, the tested residual oil is reserved in the tested piece, and the residual oil is discharged and treated by the air supply system 4 and the air outlet treatment system 6, so that the environment-friendly function is realized.
The air supply system 4 is configured to supply compressed air for purging to the hydraulic proportioning solenoid valve 100 after testing for purging test residual oil from the test piece.
The air supply system 4 includes an air supply compressor 37, an air relief valve pressure regulator 7, and an air supply pressure transmitter 9, the air supply compressor 37 providing an air intake pressure to the compressed air, the air relief valve pressure regulator 7 controlling the air intake pressure, the air supply pressure transmitter 9 collecting the air intake pressure and transmitting it to an electronic power drive board 40, wherein the electronic power drive board 40 is capable of transmitting the air intake pressure to the industrial control computer 1.
The air supply system 4 further includes an air cleaner 36 for filtering and then inputting air. A compressed air pipe 8 is also included as a delivery pipe, and an air supply shut-off valve 10 is included for switching off or on the air supply system 4 circuit.
The air supply system cuts off an oil supply stop valve 13 of a loop of the oil supply system 3 according to a working module instruction of the industrial control computer 1, and is connected with an electric control stop valve 10 of the air supply system to supply compressed air with certain pressure into an oil supply pipe of the tested hydraulic proportional electromagnetic valve, and the test residual oil left in the hydraulic proportional electromagnetic valve after the test work is completed is cleaned through air flow. The compressed air is clean compressed air which is pressurized by an electric air compressor 37 after the air is filtered by an air filter 36 and is regulated to a proper working pressure by an air relief valve pressure regulator 7. The industrial control computer 1 monitors the supply air pressure of the air pressure system via the supply air pressure transmitter 9.
The air-out treatment system 6 is configured to treat air flowing through the hydraulic proportional solenoid valve 100.
As shown in fig. 2, the gas outlet treatment system 6 includes a gas outlet electric control stop valve 29 and a gas-oil separator 27, the gas outlet electric control stop valve 29 can switch on or off the circuit of the gas outlet treatment system 6, and the gas-oil separator 27 can receive and separate the gas-oil mixture gas. The air outlet treatment system 6 cuts off the oil outlet electric control stop valve 21 through the switching of the oil circuit and the air circuit electric control stop valve according to the working module instruction of the industrial control computer 1, and switches on the air outlet electric control stop valve 29, so that the oil-gas mixed gas with oil drops and oil-gas droplets flowing through the tested piece flows into the oil-gas separator 27 through the electric control stop valve 29, the oil-gas mixed gas with the oil drops and the oil-gas droplets is separated out of test oil and flows back to the test oil tank, and the filtered clean air is discharged back to the atmosphere through the air extractor.
Also included is a test bench 45; as shown in fig. 3, the test bench 45 is provided with an upper layer and a lower layer; the oil supply system 3, the oil outlet regulating system 5, the air supply system 4 and the air outlet treatment system 6 are all arranged on the lower layer; a base 49 is fixed on the upper layer, a mounting module 48 is fixed on the base 49, and a hydraulic proportional solenoid valve 100 can be mounted on the mounting module 48; the top of the upper layer is provided with a wind collecting cover 46, the outside of the upper layer is provided with an exhaust fan 25, the wind collecting cover 46 is connected with the exhaust fan 25, and a gas outlet of the oil-gas separator 27 is connected to the exhaust fan 25.
The working flow of the engineering machinery hydraulic proportional solenoid valve test bed provided by the embodiment of the application is characterized in that the tested hydraulic proportional solenoid valve is mounted and fastened on a special mounting module 48 after the test is started, the mounting module 48 is designed into a standard module with the same size and shape as various oil inlet, oil outlet and oil return channels according to the design of the test bed, and a special module mounting seat mounted in a matched manner with the mounting module 48 is mounted on the surface of the test bed. Therefore, when hydraulic proportional solenoid valve products of different types and kinds are tested, such as proportional pressure regulating solenoid valves and proportional flow solenoid valves, the tested proportional solenoid valves are fixed on a special installation module, then the special module provided with the tested hydraulic proportional solenoid valves is installed on a module installation seat of a test bed, and a power supply connection plug is inserted on an electrical socket of the tested proportional solenoid valves, so that the test work can be carried out.
In another embodiment, a method for testing a hydraulic proportional solenoid valve is provided, comprising the steps of:
(1) After the test is started, the hydraulic proportional solenoid valve 100 is mounted and fastened to the mounting module 48;
(2) Starting test operation, powering on a test device, opening an industrial control computer 1, initializing working software of the industrial control computer 1 and working software of an electronic power driving plate 40, selecting a driving working module matched with a hydraulic proportional solenoid valve 100 on the industrial control computer 1 by a test operator through man-machine interaction, inputting various working condition parameters required by the test, setting a test oil working temperature, starting a driving system 2, an oil supply system 3 and an oil outlet regulating system 5 after the test oil temperature reaches the set temperature to enable the hydraulic proportional solenoid valve 100 to enter a specified working condition working state, at the moment, measuring oil inlet pressure by a high-pressure oil pressure transmitter 12 by the electronic power driving plate 40, measuring output oil pressure by a pressure transmitter 22, measuring output flow by a flow transmitter 23, and controlling driving current of the electric control proportional flow solenoid valve 24 by a closed loop to enable the output oil pressure and the output flow to meet the current test working condition to obtain a test result;
(3) After the test work is completed, the residual test oil working module of the hydraulic proportional electromagnetic valve 100 is cleared by calling the industrial control computer 1, the oil supply electromagnetic valve 13 of the loop of the oil supply system 3 is automatically cut off, the air supply stop valve 10 of the loop of the air supply system 4 is connected, the oil outlet stop valve 21 of the loop of the oil outlet regulating system 5 is cut off, the air outlet electric control stop valve 29 of the loop of the air outlet treatment system 6 is connected, the hydraulic proportional electromagnetic valve 100 is changed into a compressed air passage from an original oil passage, and meanwhile, the electronic power driving plate 40 provides the hydraulic proportional electromagnetic valve 100 with the maximum opening working current, so that the opening of the hydraulic proportional electromagnetic valve 100 is maximum, and the compressed air can quickly take away residual oil;
(4) After the cleaning operation is completed, the hydraulic proportional solenoid valve 100 and the mounting module 48 are disassembled, the test device is powered off, and the test is ended.
When the air is supplied, the method further comprises the following substeps: the air supply compressor 37 supplies compressed air with a certain pressure to the air supply system 4 circuit, the air relief valve pressure regulator 7 controls the air intake pressure delivered by the air supply compressor 37, and the air supply pressure transmitter 9 collects the air intake pressure and sends it to the electronic power driving board 40, wherein the electronic power driving board 40 can send the air intake pressure to the industrial control computer 1.
During the air outlet, the method further comprises the following substeps: the compressed gas flows through the hydraulic proportional solenoid valve 100 to form a tested oil-gas mixture, the tested oil-gas mixture enters the oil-gas separator 27 through the air-out electric control stop valve 29, the oil-gas separator 27 flows the separated test oil back to the test oil tank, and the separated air is discharged back to the atmosphere through the exhaust fan 25.
The electronic driving board 40 can also upload the performance data obtained by the test to the industrial control computer 1 in real time, then continuously adjust the power supply of the driving board to the proportional solenoid valve, test the next working condition point, obtain the driving power supply voltage and driving power supply current of the proportional solenoid valve under different working condition parameters, and output the performance data such as the pressure drop of various solenoid valves of the measured proportion of oil pressure and output flow. And then, carrying out data processing by the industrial control computer 1, drawing various performance characteristic curves of the proportional electromagnetic valve, generating a test report of the proportional electromagnetic valve and the reversing valve, and storing and printing various performance data obtained by the test.
The main technical parameters of the proportional solenoid valve test device provided by the embodiment of the application comprise: the power supply voltage is three-phase 380V, the rotating speed range of the main motor is 50-4000 rpm, and the oil supply amount of the oil supply system is more than or equal to 20 liters/min.
According to the test device provided by the embodiment of the application, the oil supply system can control the oil inlet pressure according to the working condition parameters of the proportional electromagnetic valve, the oil outlet regulating system can control the output oil pressure and the output flow of the proportional electromagnetic valve according to the working condition parameters of the proportional electromagnetic valve, the industrial control computer collects performance data of the proportional electromagnetic valve under each working condition, the test of the proportional electromagnetic valve is completed according to the performance data, the test of the engineering mechanical hydraulic proportional electromagnetic valve with various structures and performances can be realized, the research and development and the test of the engineering mechanical hydraulic proportional electromagnetic valve are assisted, and the research and development process is accelerated.
As shown in fig. 3, the test device for a proportional solenoid valve according to the embodiment of the present application is provided, in which the hydraulic proportional solenoid valve 100 to be tested is mounted on the module mounting seat 49 of the test bench 45 through the mounting module 48 on the basis of the above embodiment.
As shown in fig. 3, the device further comprises an electric control cabinet 38, a precise stabilized power supply 39, an electronic power driving board 40 and a printer 41 are arranged on the electric control cabinet 38, a driving power supply connecting seat 42, a power plug 43, a power wire 44, a wind collecting cover 46 and an exhaust fan 25 are arranged on the upper layer of a test bed 45, and a hydraulic station 51 and a compressed air station 50 are arranged on the lower layer of the test bed.
The test bench is provided with a fully-closed operation chamber, two sides of the operation chamber are provided with movable windows, and the movable windows are provided with transparent protective covers.
The test device can close the fully transparent protective window during operation, and is also provided with a special air exhaust system, so that the oil vapor of the test oil is discharged outdoors, and the health and safety of personnel are ensured.
Requirements for test oil temperatures for different temperatures: the test bed is provided with a totally-enclosed operation room, and both sides of the test bed are provided with movable doors with transparent protective covers, so that the diffusion of oil mist can be reduced, and the safety of personnel is ensured. The test bed is provided with a ventilation system, and air in the test device is discharged outdoors through the ventilation system during operation, so that the air in the test bed is prevented from accumulating.
According to the test device for the hydraulic proportional solenoid valve, after the pumped high-pressure oil is subjected to output oil pressure and output flow control through the electric control proportional flow solenoid valve, the output flow is measured through the flowmeter, and the output flow can reach 1-level precision.
The test device adopts the industrial control computer and the electronic control unit driving board, can compile different working software modules aiming at the structures and control modes of various hydraulic proportional solenoid valves at home and abroad at present, can be suitable for performance test of most various hydraulic proportional solenoid valves of engineering machinery at home and abroad by selecting different working software modules, is convenient to install and debug, has high measurement precision, can carry out program control and automatic display and printing and storage on test programs and test results, and also can have common fault detection and display functions.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in one or more software and/or hardware elements when implemented in the present application.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, with reference to the description of method embodiments in part. The apparatus and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (7)
1. The hydraulic proportional solenoid valve testing device for the engineering machinery is used for testing a hydraulic proportional solenoid valve (100), wherein the hydraulic proportional solenoid valve (100) is tested to have multiple working conditions, and the multiple working conditions correspond to multiple working condition parameters; the method is characterized in that:
the test device comprises:
an industrial control computer (1), a driving system (2), an oil supply system (3) and an oil outlet regulating system (5), an air supply system (4) and an air outlet treatment system (6);
wherein the industrial control computer (1) is configured to receive the plurality of working condition parameters of the hydraulic proportional solenoid valve (100), collect performance data of the hydraulic proportional solenoid valve (100) under each working condition, and complete the test of the hydraulic proportional solenoid valve (100) according to the performance data;
the drive system (2) is configured to provide drive voltages and drive currents to different ones of the hydraulic proportioning solenoid valves (100) that operate under various operating conditions;
the oil supply system (3) is configured to supply oil and control the oil inlet pressure of the hydraulic proportional solenoid valve (100) according to the plurality of operating condition parameters;
the oil outlet regulating system (5) is configured to control the output oil pressure and the output flow rate of the hydraulic proportional solenoid valve (100) according to the plurality of working condition parameters;
The air supply system (4) is configured to supply compressed air for cleaning into the hydraulic proportional solenoid valve (100) after testing;
-the air outlet treatment system (6) is configured to treat air flowing through the hydraulic proportional solenoid valve (100);
the industrial control computer (1) is configured to control the oil supply system (3) and the oil outlet regulating system (5) to be turned on, to switch off the air supply system (4) and the air outlet treatment system (6), and to control the air supply system (4) and the air outlet treatment system (6) to be turned on, to switch off the oil supply system (3) and the oil outlet regulating system (5);
the industrial control computer (1) is connected with an electronic power driving plate (40), a voltage sensor and a current sensor are arranged on the electronic power driving plate (40), and the industrial control computer (1) collects the driving voltage and the driving current of the hydraulic proportional solenoid valve (100) under each working condition through the voltage sensor and the current sensor;
the oil supply system (3) comprises a high-pressure oil pressure transmitter (12), an oil inlet pressure control valve (35) and an oil supply electromagnetic valve (13), wherein the oil inlet pressure control valve (35) is used for controlling the oil inlet pressure; the high-pressure oil pressure transmitter (12) collects the oil inlet pressure and transmits the oil inlet pressure to the electronic power driving plate (40), wherein the electronic power driving plate (40) can transmit the oil inlet pressure to the industrial control computer (1); the oil supply electromagnetic valve (13) is used for switching off or switching on a loop of the oil supply system (3);
The oil outlet regulating system (5) comprises a pressure transmitter (22), a flow transmitter (23) and an electric control proportional flow electromagnetic valve (24), wherein the pressure transmitter (22) and the flow transmitter (23) respectively collect the output oil pressure and the output flow and send the output oil pressure and the output flow to an electronic power driving plate (40), and the electronic power driving plate (40) controls the driving voltage and the driving current according to the electric control proportional flow electromagnetic valve (24), wherein the electronic power driving plate (40) can send the output oil pressure and the output flow to an industrial control computer (1).
2. The test device for hydraulic proportional solenoid valve of engineering machinery according to claim 1, wherein: the air supply system (4) comprises an air supply compressor (37), an air overflow valve pressure regulator (7) and an air supply pressure transmitter (9), wherein the air supply compressor (37) provides air inlet pressure for compressed air, the air overflow valve pressure regulator (7) controls the air inlet pressure, the air supply pressure transmitter (9) collects the air inlet pressure and sends the air inlet pressure to the electronic power driving board (40), and the electronic power driving board (40) can send the air inlet pressure to the industrial control computer (1).
3. The test device for hydraulic proportional solenoid valve of engineering machinery according to claim 2, wherein: the gas outlet treatment system (6) comprises a gas outlet electric control stop valve (29) and a gas-oil separator (27), wherein the gas outlet electric control stop valve (29) can be used for switching on or switching off a loop of the gas outlet treatment system (6), and the gas-oil separator (27) can be used for receiving and separating gas-oil mixed gas.
4. The test device for hydraulic proportional solenoid valve of engineering machinery according to claim 3, wherein: further comprising a test bench (45); the test bench (45) is provided with an upper layer and a lower layer; the oil supply system (3), the oil outlet regulating system (5), the air supply system (4) and the air outlet treatment system (6) are all arranged on the lower layer; a base (49) is fixed on the upper layer, a mounting module (48) is fixed on the base (49), and the hydraulic proportional solenoid valve (100) can be mounted on the mounting module (48); the top of the upper layer is provided with a wind collecting cover (46), the outer part of the upper layer is provided with an exhaust fan (25), the wind collecting cover (46) is connected with the exhaust fan (25), and a gas outlet of the oil-gas separator (27) is connected to the exhaust fan (25).
5. A testing method of a hydraulic proportional electromagnetic valve of engineering machinery is characterized by comprising the following steps of: the hydraulic proportional solenoid valve testing device applied to the engineering machinery disclosed in claim 4 comprises the following steps:
after the test is started, the hydraulic proportional solenoid valve (100) is installed and fastened on the installation module (48);
starting test operation, powering on a test device, starting an industrial control computer (1), initializing working software of the industrial control computer (1) and working software of an electronic power driving plate (40), selecting a driving working module matched with the hydraulic proportional solenoid valve (100) on the industrial control computer (1) by a test operator through man-machine interaction, inputting various working condition parameters required by the test, setting a test oil working temperature, starting the driving system (2), the oil supply system (3) and the oil outlet regulating system (5) after the test oil temperature reaches the set temperature, enabling the hydraulic proportional solenoid valve (100) to enter a specified working condition working state, at the moment, measuring the oil inlet pressure by the electronic power driving plate (40) through the high-pressure oil pressure transmitter (12), measuring the output oil pressure by the pressure transmitter (22), measuring the output flow by the flow transmitter (23), and controlling the driving current of the electric control proportional solenoid valve (24) through a closed loop, so that the output oil pressure and the current output flow meet the current test result to obtain the test result;
After the test work is finished, the residual test oil working module of the hydraulic proportional electromagnetic valve (100) is cleared through calling the industrial control computer (1), the oil supply electromagnetic valve (13) of the oil supply system (3) loop is automatically cut off, the air supply stop valve (10) of the air supply system (4) loop is connected, the oil outlet stop valve (21) of the oil outlet regulating system (5) loop is cut off, the air outlet electric control stop valve (29) of the air outlet treating system (6) loop is connected, the hydraulic proportional electromagnetic valve (100) is changed into a compressed air passage from an original oil passage, and meanwhile, the electronic power driving plate (40) provides the hydraulic proportional electromagnetic valve (100) with the maximum opening working current, so that the opening of the hydraulic proportional electromagnetic valve (100) is maximum, and the compressed air can quickly take away residual oil;
after the cleaning work is completed, the hydraulic proportional solenoid valve (100) and the mounting module (48) are disassembled, the test device is powered off, and the test is finished.
6. The method for testing the hydraulic proportional solenoid valve of the engineering machinery according to claim 5, wherein the method comprises the following steps: the method also comprises the following substeps: the air supply compressor (37) provides compressed air with a certain pressure for the air supply system (4) loop, the air overflow valve pressure regulator (7) controls the air inlet pressure conveyed by the air supply compressor (37), the air supply pressure transmitter (9) collects the air inlet pressure and sends the air inlet pressure to the electronic power driving board (40), and the electronic power driving board (40) can send the air inlet pressure to the industrial control computer (1).
7. The method for testing the hydraulic proportional solenoid valve of the engineering machinery according to claim 6, wherein the method comprises the following steps: the method also comprises the following substeps: the compressed gas flows through the hydraulic proportional electromagnetic valve (100) to form a tested oil-gas mixture, the tested oil-gas mixture enters the oil-gas separator (27) through the air-out electric control stop valve (29), the oil-gas separator (27) flows the separated test oil back to the test oil tank, and the separated air is discharged back to the atmosphere through the exhaust fan (25).
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| CN100564898C (en) * | 2007-11-28 | 2009-12-02 | 三一重工股份有限公司 | Electro-hydraulic proportional flow valve speed regulating control system and method |
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|---|---|---|---|---|
| CN102297181A (en) * | 2010-11-18 | 2011-12-28 | 重庆大学 | Hydraulic control loop of hydraulic system performance test bench of automatic transmission |
| CN106812751A (en) * | 2015-12-01 | 2017-06-09 | 张学 | A kind of tiny flow quantity electromagnetic priority valve performance test hydraulic control system |
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