CN114623125B - A high-speed switch valve performance test system - Google Patents

Abstract

A performance test system for a high-speed switch valve relates to the technical field of performance test of high-speed switch valves. The problems that the existing product for detecting the performance of the high-speed switch valve is single in test function and small in load adjusting range are solved. The test system can be simultaneously provided with the two-position three-way high-speed switch valve and the two-position two-way high-speed switch valve, and the performance tests of the two high-speed switch valves are respectively realized by opening and closing different stop valves. The first proportional overflow valve can adjust the inlet pressure and flow of the test valve and keep the inlet pressure and flow constant, and the second proportional overflow valve and the throttle valve can adjust the outlet pressure and flow of the two-way valve and the three-way valve to be tested and keep the outlet pressure and flow constant. The two signal generators can adjust the duty ratio of the control signal of the high-speed switch valve and test the relevant characteristics of the high-speed switch valve. And the static flow test is realized by opening or closing the third stop valve or the fourth stop valve. The invention is suitable for testing the high-speed switch valve.

Description

A high-speed switch valve performance test system

technical field

The invention relates to the technical field of performance testing of high-speed switching valves.

Background technique

Hydraulic transmission has many advantages such as high power density, compact structure, flexible layout, and high control precision, and is widely used in various electromechanical systems. As an important control component of the hydraulic system, the performance of the hydraulic valve directly affects the performance of the hydraulic system.

In recent years, with the continuous development of digital hydraulics, digital hydraulic valve products are also emerging. Among many products, the high-speed switching valve is the most basic and mature digital hydraulic valve. It has outstanding features in connection with the PC, structural composition, environmental friendliness, processing cost, working performance, and cleanliness. , It is unmatched by traditional hydraulic valves such as other proportional valves and servo valves. The basic idea of this kind of valve is: use the modulated pulse signal to control the high-speed switch of the valve port, so as to change the time ratio between the opening and closing of the valve port to adjust the average flow or pressure output by the valve. The valve port of the high-speed switching valve has only two definite positions, and the product is very convenient to connect with the computer interface.

Therefore, testing the performance of high-speed switching valves is an indispensable link in product design and production. Testing the performance of high-speed switching valves is beneficial to product design, improving product performance, and controlling the production quality of hydraulic valves. Generally, the high-speed switching valve performance test system has problems such as single function and small load adjustment range. When testing various performance indicators of the valve, different test systems need to be replaced.

Contents of the invention

The purpose of the present invention is to solve the problems of single test function and small load adjustment range in existing products for testing the performance of high-speed switching valves, and propose a high-speed switching valve performance testing system.

A high-speed switching valve performance testing system according to the present invention includes a fuel tank, a first proportional overflow valve, a variable hydraulic pump, a speed regulating valve, a proportional pressure reducing valve, a first two-position three-way electromagnetic reversing valve, a first signal Generator, second signal generator, first stop valve, second stop valve, third stop valve, fourth stop valve, second two-position three-way electromagnetic reversing valve, third two-position three-way electromagnetic reversing valve , second proportional relief valve, throttle valve, hydraulic cylinder, thrust sensor and displacement sensor;

The oil tank is filled with oil, and the oil outlet of the oil tank communicates with the oil inlet of the variable hydraulic pump. The variable hydraulic pump is used to adjust the pressure of the oil flowing through itself. The oil outlet of the variable hydraulic pump At the same time, it communicates with the oil inlet of the first proportional relief valve and the oil inlet of the speed regulating valve. The oil outlet of the first proportional relief valve is connected to the oil tank. The first proportional relief valve is used to adjust the variable hydraulic pump Oil pressure on the outlet side;

The oil outlet of the speed regulating valve is connected with the oil inlet port of the proportional pressure reducing valve, and the oil outlet of the proportional pressure reducing valve is connected with the liquid inlet P of the first two-position three-way electromagnetic reversing valve, and the first The control port A of the two-position three-way electromagnetic reversing valve is used to connect the liquid inlet of the three-way valve to be tested, one liquid outlet of the three-way valve to be tested is directly connected to the oil tank, and the other outlet of the three-way valve to be tested The liquid port is connected to the liquid inlet of the third shut-off valve and the liquid inlet of the fourth shut-off valve through the first cut-off valve;

The liquid outlet B of the first two-position three-way electromagnetic reversing valve is connected to the liquid inlet of the two-way valve to be tested, and the liquid outlet of the two-way valve to be tested is connected to the third shut-off valve and the The fourth cut-off valve;

The liquid outlet of the third cut-off valve is connected to the fuel tank;

The liquid outlet of the fourth cut-off valve is connected to the liquid inlet P of the second two-position three-way electromagnetic reversing valve, and the liquid outlet B of the second two-position three-way electromagnetic reversing valve is connected to the upper chamber liquid inlet of the hydraulic cylinder. The liquid outlet of the lower chamber of the hydraulic cylinder is connected to the oil tank;

One end of the piston rod of the hydraulic cylinder is aligned with a block, and a thrust sensor is arranged between the block and one end of the piston rod, and the thrust sensor is used to collect the thrust of the piston rod on the block; the displacement sensor is used to collect the movement of the block. displacement;

The control port A of the second two-position three-way electromagnetic reversing valve is connected to the liquid inlet P of the third two-position three-way electromagnetic reversing valve, and the control port A of the third two-position three-way electromagnetic reversing valve is connected to the second The liquid inlet of the proportional overflow valve and the liquid outlet B of the third two-position three-way electromagnetic reversing valve are connected to the liquid inlet of the throttle valve.

Further, in the present invention, a first filter is also included, and the first filter is arranged between the oil and the variable hydraulic pump, and is used for filtering the oil entering the variable hydraulic pump.

Further, in the present invention, a one-way valve and a muffler are also included; the one-way valve and the muffler are sequentially arranged between the variable hydraulic pump and the speed regulating valve, and the muffler is used to reduce the pressure of the hydraulic oil discharged by the variable hydraulic pump and flow pulsation.

Further, in the present invention, a first flow sensor, a first pressure sensor and a first temperature sensor are also included, and the first flow sensor, the first pressure sensor and the first temperature sensor are all arranged at the oil outlet of the proportional pressure reducing valve. Between the port and the liquid inlet of the first two-position three-way electromagnetic reversing valve.

Further, in the present invention, a second temperature sensor, a second pressure sensor, and a second flow sensor are also included; the second temperature sensor, the second pressure sensor, and the second flow sensor are all arranged between the first cut-off valve and the second Between the liquid outlet of the shut-off valve and the liquid inlets of the third shut-off valve and the fourth shut-off valve.

Further, in the present invention, a heater, a cooler, a fourth two-position three-way electromagnetic reversing valve and a quantitative hydraulic pump are also included;

The liquid inlet of the quantitative hydraulic pump is connected to the oil tank, the liquid outlet of the quantitative hydraulic pump is connected to the liquid inlet P of the fourth two-position three-way electromagnetic reversing valve, the control port A of the fourth two-position three-way electromagnetic reversing valve is connected to the heater The liquid inlet of the heater is connected, and the liquid outlet of the heater is connected with the oil tank;

The liquid outlet B of the fourth two-position three-way electromagnetic reversing valve communicates with the liquid inlet of the cooler, and the liquid outlet of the cooler is connected with the oil tank.

Further, in the present invention, it also includes a third temperature sensor, an exhaust valve and a liquid level gauge; the third temperature sensor is used to collect the oil temperature in the oil tank; the exhaust valve is arranged on the oil tank to discharge the oil tank. The gas is depressurized, and the liquid level gauge is used to collect the liquid level signal of the oil in the fuel tank.

Further, in the present invention, a second filter is also included; the second filter is arranged between the quantitative hydraulic pump and the oil tank, and is used to filter the oil entering the quantitative hydraulic pump.

Further, in the present invention, when the three-way valve is tested, the first two-position three-way electromagnetic reversing valve is powered off, the first stop valve is opened, and the second stop valve is closed.

Further, in the present invention, when the two-way valve is tested, the first two-position three-way electromagnetic reversing valve is energized, the first stop valve is closed, and the second stop valve is opened.

The system of the present invention can realize the pressure, flow, valve core opening and closing time and other performance tests of the high-speed switching valve, the load can be adjusted by adjusting the size of the block, and the performance test of the high-speed switching valve under high and low temperature environments can also be realized The test system also provides two installation positions for high-speed switching valves to facilitate the performance testing of two different forms of high-speed switching valves, two-position two-way and two-position three-way, effectively improving the versatility of the testing system.

Description of drawings

Fig. 1 is the connection schematic diagram of the high-speed switching valve performance testing system of the present invention;

Figure 2 is a schematic diagram of the connection of the heater and cooler.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Specific Embodiment 1: The present embodiment will be described below in conjunction with FIG. 1. A high-speed switch valve performance test system described in this embodiment includes a fuel tank 1, a first proportional overflow valve 2, a variable hydraulic pump 4, a speed regulating valve 7, Proportional decompression valve 8, first two-position three-way electromagnetic reversing valve 12, first signal generator 13, second signal generator 14, first stop valve 15, second stop valve 16, third stop valve 20, Fourth cut-off valve 21, second two-position three-way electromagnetic reversing valve 22, third two-position three-way electromagnetic reversing valve 23, second proportional overflow valve 24, throttle valve 25, hydraulic cylinder 26, thrust sensor 27 and displacement sensor 28;

The oil tank 1 is filled with oil, and the oil outlet of the oil tank 1 communicates with the oil inlet of the variable hydraulic pump 4. The variable hydraulic pump 4 is used to adjust the pressure of the oil flowing through itself. The variable hydraulic pump The oil outlet of 4 is connected with the oil inlet of the first proportional relief valve 2 and the oil inlet of the speed regulating valve 7 at the same time, the oil outlet of the first proportional relief valve 2 is connected to the oil tank 1, and the first proportional The overflow valve 2 is used to adjust the oil pressure on the oil outlet side of the variable hydraulic pump 4;

The oil outlet of the speed regulating valve 7 is connected with the oil inlet of the proportional pressure reducing valve 8, and the oil outlet of the proportional pressure reducing valve 8 is connected with the liquid inlet P of the first two-position three-way electromagnetic reversing valve 12, The control port A of the first two-position three-way electromagnetic reversing valve 12 is used to connect the liquid inlet of the three-way valve to be tested, and a liquid outlet of the three-way valve to be tested is directly connected to the oil tank 1, the three-way valve to be tested The other liquid outlet of the through valve is connected to the liquid inlet of the third shut-off valve 20 and the liquid inlet of the fourth shut-off valve 21 through the first cut-off valve 15;

The liquid outlet B of the first two-position three-way electromagnetic reversing valve 12 is connected to the liquid inlet of the two-way valve to be tested, and the liquid outlet of the two-way valve to be tested is connected to the third cut-off valve through the second cut-off valve 16. valve 20 and fourth stop valve 21;

The liquid outlet of the third cut-off valve 20 is connected to the oil tank 1;

The liquid outlet of the fourth cut-off valve 21 is connected to the liquid inlet P of the second two-position three-way electromagnetic reversing valve 22, and the liquid outlet B of the second two-position three-way electromagnetic reversing valve 22 is connected to the upper chamber inlet of the hydraulic cylinder 26. Liquid port, the liquid outlet of the lower chamber of the hydraulic cylinder 26 is connected to the oil tank 1;

One end of the piston rod of the hydraulic cylinder 26 is aligned with a block, and a thrust sensor is arranged between the block and one end of the piston rod. The thrust sensor 27 is used to collect the thrust of the piston rod to the block; the displacement sensor 28 is used to collect The displacement of the block;

The control port A of the second two-position three-way electromagnetic reversing valve 22 is connected to the liquid inlet P of the third two-position three-way electromagnetic reversing valve 23, and the third two-position three-way electromagnetic reversing valve 23 controls port A It is connected to the liquid inlet of the second proportional relief valve 24 , and the liquid outlet B of the third two-position three-way electromagnetic reversing valve 23 is connected to the liquid inlet of the throttle valve 25 .

In this embodiment, the system can install a two-position three-way high-speed on-off valve and a two-position two-way high-speed on-off valve at the same time. By opening and closing different cut-off valves, the performance tests for the above two high-speed on-off valves are respectively realized. The first proportional overflow valve can adjust the inlet pressure and flow of the test valve, and keep the inlet pressure and flow constant. The second proportional overflow valve 24 and throttle valve 25 can adjust the outlet pressure and the outlet pressure of the two-way valve and three-way valve to be tested. flow, and keep the outlet pressure and flow constant. The first signal generator 13 and the second signal generator 14 can adjust the duty cycle of the high-speed switching valve control signal, and test the relevant characteristics of the high-speed switching valve. Static flow test is realized by opening or closing the third stop valve or the fourth stop valve. The pulse signal and pressure signal of the high-speed switching valve can be detected by the oscilloscope, and the opening and closing time can be measured. The load size can be varied by choosing blocks of different qualities, and empty loads can be achieved when blocks are removed.

The system of the present invention can test the performance of two different types of high-speed switching valves, two-position two-way and two-position three-way. Internal leakage; the pressure characteristics test of the high-speed switching valve can detect the pressure characteristics of the high-speed switching valve and the sensitivity to the load; the pressure resistance test of the high-speed switching valve can detect the high-speed switching valve’s pressure resistance and whether there is mechanical damage; Carry out a sealing test on the high-speed switching valve to detect the sealing performance of the high-speed switching valve and the leakage at the outlet; conduct a static flow test on the high-speed switching valve to detect the static flow rate at the outlet of the high-speed switching valve; test the spool of the high-speed switching valve The opening and closing time test can detect the opening time and closing time of the high-speed switching valve; conduct high and low temperature experiments on the high-speed switching valve to detect the pressure-flow characteristics of the high-speed switching valve under different temperature conditions; the load can be adjusted.

Further, in this embodiment, a first filter 3 is also included, and the first filter 3 is arranged between the oil tank 1 and the variable hydraulic pump 4 for filtering the oil entering the variable hydraulic pump 4 .

Further, in this embodiment, a one-way valve 5 and a muffler 6 are also included; the one-way valve 5 and the muffler 6 are sequentially arranged between the variable hydraulic pump 4 and the speed regulating valve 7, and the muffler 6 is used to reduce the variable The pressure and flow rate of the hydraulic oil discharged from the hydraulic pump 4 fluctuate.

In this embodiment, the muffler is used to eliminate the influence of the pressure and flow pulsation of the hydraulic pump on the performance detection of the high-speed switching valve.

Further, in this embodiment, a first flow sensor 9, a first pressure sensor 10 and a first temperature sensor 11 are also included, and the first flow sensor 9, the first pressure sensor 10 and the first temperature sensor 11 are all arranged on Between the oil outlet of the proportional decompression valve 8 and the liquid inlet of the first two-position three-way electromagnetic reversing valve 12 .

Further, in this embodiment, a second temperature sensor 17, a second pressure sensor 18, and a second flow sensor 19 are also included; the second temperature sensor 17, the second pressure sensor 18, and the second flow sensor 19 are all set at Between the liquid outlets of the first stop valve 15 and the second stop valve 16 and the liquid inlets of the third stop valve 20 and the fourth stop valve 21 .

Further, this embodiment is described in conjunction with FIG. 2 . In this embodiment, a heater 29, a cooler 30, a fourth two-position three-way electromagnetic reversing valve 31 and a quantitative hydraulic pump 32 are also included;

The liquid inlet of the quantitative hydraulic pump 32 is connected to the oil tank 1, the liquid outlet of the quantitative hydraulic pump 32 is connected to the liquid inlet P of the fourth two-position three-way electromagnetic reversing valve 31, and the control of the fourth two-position three-way electromagnetic reversing valve 31 Port A communicates with the liquid inlet of the heater 29, and the liquid outlet of the heater 29 communicates with the oil tank;

The liquid outlet B of the fourth two-position three-way electromagnetic reversing valve 31 communicates with the liquid inlet of the cooler 30 , and the liquid outlet of the cooler 30 is connected with the oil tank 1 .

The system described in this embodiment can conduct high and low temperature experiments, and control the temperature of the oil entering the high-speed switching valve by heating or cooling the oil in the oil tank to ensure a constant temperature of the oil entering the test valve.

Further, in this embodiment, a third temperature sensor 34, an exhaust valve 35 and a liquid level gauge 36 are also included; the third temperature sensor 34 is used to collect the oil temperature in the oil tank 1; the exhaust valve 35 is arranged in the oil tank 1 on, used to exhaust and reduce the pressure of the fuel tank 1, and the liquid level gauge 36 is used to collect the liquid level signal of the oil in the fuel tank 1.

Further, in this embodiment, a second filter 33 is also included; the second filter 33 is arranged between the quantitative hydraulic pump 32 and the oil tank 1 , and is used to filter the oil entering the quantitative hydraulic pump 32 .

Further, in this embodiment, when the three-way valve is tested, the first two-position three-way electromagnetic reversing valve 12 is powered off, the first stop valve 15 is opened, and the second stop valve 16 is closed.

Further, in this embodiment, when the two-way valve is tested, the first two-position three-way electromagnetic reversing valve 12 is energized, the first stop valve 15 is closed, and the second stop valve 16 is opened.

The system of the present invention can install two kinds of high-speed on-off valves at the same time. By operating the first two-position three-way electromagnetic reversing valve 12, the first shut-off valve 15, and the second shut-off valve 16, the valve realizes the test of these two valves : When the first two-position three-way electromagnetic reversing valve 12 is powered off, as shown in Figure 1, the oil passes through the three-way valve, the first stop valve 15 will be opened, and the second stop valve 16 will be closed, otherwise the oil will It will flow through 16 in the opposite direction; similarly, after 12 is energized, the channel changes, the oil passes through the two-way valve, the second stop valve 16 must be opened, and the first stop valve 15 must be closed, so that high-speed control of different valve ports is realized. Valve test.

Pressure test: Test the state of the high-speed valve under the rated pressure. At this time, it is necessary to block the outlet of the valve, just like a faucet. Block the faucet, and the water plant will increase the water pressure to see if there is any leakage. . How to block the valve outlet? By closing the first stop valve 15 or the second stop valve 16, when testing the three-way valve, the first two-position three-way electromagnetic reversing valve 12 is powered off, and the first stop valve 15 is closed; test In the case of a two-way valve, the first two-position three-way electromagnetic reversing valve 12 is energized, and the second stop valve 16 is closed. The difference between the pressure test and the sealing test is that the pressure test needs to close the stop valve downstream of the tested valve, and then The variable displacement pump works to apply pressure to the valve under test.

Static flow test: For other tests of the valve, the valve outlet is loaded. After the oil passes through the second flow sensor 19, it directly flows back to the oil tank 1 through the third shut-off valve 20. In order to ensure this flow, the third shut-off valve 20 is open, and the fourth cut-off valve 21 is closed.

After the static flow is completed, the third stop valve 20 is closed, and the link after the second two-position three-way electromagnetic reversing valve 22 is divided into three parts, which are the second proportional overflow valve 24, the throttle valve 25, and the hydraulic cylinder 26. When the oil flows through the hydraulic cylinder 26, the second two-position three-way electromagnetic reversing valve 22 must be energized; when the oil flows to the second proportional relief valve 24 or throttle valve 25, the second two-position three-way The electromagnetic reversing valve 22 is powered off, and then it is distinguished whether the oil flows to the second proportional overflow valve 24 or the throttle valve 25; when the third two-position three-way electromagnetic reversing valve 23 is powered off, the oil flows through the second proportional overflow Throttle valve 24, flow through throttle valve 25 when energized

Flow characteristics test: close the third cut-off valve 20, the third cut-off valve 20, open the fourth cut-off valve 21, power off the second two-position three-way electromagnetic reversing valve 22, as shown in Figure 1, the second proportional relief valve 24 25 is to adjust the outlet flow, so that the second flow sensor 19 can measure the corresponding valve outlet flow under different outlet flows. ;

Pressure-flow characteristics: make the oil flow through the hydraulic cylinder 26, the second two-position three-way electromagnetic reversing valve 22 is energized, the piston rod of the hydraulic cylinder 26 moves to push the block, simulating the real working state, there are many blocks, just like weights Similarly, the load size can be changed by adjusting the number of blocks.

Pressure characteristic test: adjust the opening size of the two-way valve or three-way valve by adjusting the duty cycle, measure the outlet pressure change with a pressure sensor, and perform relevant operations on which valve to test. At this time, the third stop valve 20 should also be closed and opened. The fourth cut-off valve 21 and the second two-position three-way electromagnetic reversing valve 22 are energized, that is to say oil flows through the hydraulic cylinder 26 .

Although the invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It is therefore to be understood that numerous modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the invention as defined by the appended claims. It shall be understood that different dependent claims and features described herein may be combined in a different way than that described in the original claims. It will also be appreciated that features described in connection with individual embodiments can be used in other described embodiments.

Claims (9)

1. A high-speed switching valve performance testing system, characterized in that it includes a fuel tank (1), a first proportional relief valve (2), a variable hydraulic pump (4), a speed regulating valve (7), a proportional pressure reducing valve ( 8), the first two-position three-way electromagnetic reversing valve (12), the first signal generator (13), the second signal generator (14), the first stop valve (15), the second stop valve (16) , the third stop valve (20), the fourth stop valve (21), the second two-position three-way electromagnetic directional valve (22), the third two-position three-way electromagnetic directional valve (23), the second proportional overflow Valve (24), throttle valve (25), hydraulic cylinder (26), thrust sensor (27) and displacement sensor (28); The oil tank (1) is filled with oil, and the oil outlet of the oil tank (1) communicates with the oil inlet of the variable hydraulic pump (4), and the variable hydraulic pump (4) is used to regulate the oil flowing through itself pressure, the oil outlet of the variable variable hydraulic pump (4) is connected with the oil inlet of the first proportional relief valve (2) and the oil inlet of the speed regulating valve (7), and the first proportional relief valve The oil outlet of (2) is connected to the oil tank (1), and the first proportional relief valve (2) is used to adjust the oil pressure on the oil outlet side of the variable hydraulic pump (4); The oil outlet of the speed regulating valve (7) is connected with the oil inlet of the proportional pressure reducing valve (8), and the oil outlet of the proportional pressure reducing valve (8) is connected with the first two-position three-way electromagnetic reversing valve (12 ), the control port A of the first two-position three-way electromagnetic reversing valve (12) is used to connect the liquid inlet of the three-way valve to be tested, and one outlet of the three-way valve to be tested The liquid port is directly connected to the oil tank (1), and the other liquid outlet of the three-way valve to be tested is connected to the liquid inlet of the third cut-off valve (20) and the inlet of the fourth cut-off valve (21) through the first cut-off valve (15). Liquid port; The liquid outlet B of the first two-position three-way electromagnetic reversing valve (12) is connected to the liquid inlet of the two-way valve to be tested, and the liquid outlet of the two-way valve to be tested passes through the second cut-off valve (16) Connect the third shut-off valve (20) and the fourth shut-off valve (21); The liquid outlet of the third shut-off valve (20) is connected to the oil tank (1); The liquid outlet of the fourth cut-off valve (21) is connected to the liquid inlet P of the second two-position three-way electromagnetic reversing valve (22), and the liquid outlet B of the second two-position three-way electromagnetic reversing valve (22) is connected to the hydraulic pressure The liquid inlet of the upper chamber of the cylinder (26), the liquid outlet of the lower chamber of the hydraulic cylinder (26) is connected to the oil tank (1); One end of the piston rod of the hydraulic cylinder (26) is aligned with a block, and a thrust sensor is arranged between the block and one end of the piston rod, and the thrust sensor (27) is used to collect the thrust of the piston rod on the block; the displacement sensor (28) Used to collect the moving displacement of the block; The control port A of the second two-position three-way electromagnetic reversing valve (22) is connected to the liquid inlet P of the third two-position three-way electromagnetic reversing valve (23), and the third two-position three-way electromagnetic reversing valve (23) The control port A is connected to the liquid inlet of the second proportional relief valve (24), and the liquid outlet B of the third two-position three-way electromagnetic reversing valve (23) is connected to the liquid inlet of the throttle valve (25) ; It also includes a first flow sensor (9), a first pressure sensor (10) and a first temperature sensor (11), and the first flow sensor (9), the first pressure sensor (10) and the first temperature sensor (11) ) are all arranged between the oil outlet of the proportional pressure reducing valve (8) and the liquid inlet of the first two-position three-way electromagnetic reversing valve (12). 2. A high-speed switching valve performance testing system according to claim 1, characterized in that it also includes a first filter (3), and the first filter (3) is set between the oil tank (1) and the variable hydraulic pressure Between the pumps (4), it is used to filter the oil entering the variable displacement hydraulic pump (4). 3. A high-speed switching valve performance testing system according to claim 1, characterized in that it also includes a one-way valve (5) and a muffler (6); the one-way valve (5) and the muffler (6) are sequentially Arranged between the variable hydraulic pump (4) and the speed regulating valve (7), the muffler (6) is used to reduce the pressure and flow pulsation of the hydraulic oil discharged by the variable hydraulic pump (4). 4. A high-speed switching valve performance testing system according to claim 1, 2 or 3, characterized in that it also includes a second temperature sensor (17), a second pressure sensor (18), a second flow sensor (19 ); the second temperature sensor (17), the second pressure sensor (18), and the second flow sensor (19) are all arranged between the liquid outlets of the first shut-off valve (15) and the second shut-off valve (16) Between the liquid inlets of the third shut-off valve (20) and the fourth shut-off valve (21). 5. A high-speed switching valve performance testing system according to claim 1 or 2, characterized in that it also includes a heater (29), a cooler (30), a fourth two-position three-way electromagnetic reversing valve (31 ) and quantitative hydraulic pump (32); The liquid inlet of the quantitative hydraulic pump (32) is connected to the fuel tank (1), and the liquid outlet of the quantitative hydraulic pump (32) is connected to the liquid inlet P of the fourth two-position three-way electromagnetic reversing valve (31). The control port A of the electromagnetic reversing valve (31) communicates with the liquid inlet of the heater (29), and the liquid outlet of the heater (29) communicates with the oil tank; The liquid outlet B of the fourth two-position three-way electromagnetic reversing valve (31) communicates with the liquid inlet of the cooler (30), and the liquid outlet of the cooler (30) is connected to the oil tank (1). 6. A high-speed switching valve performance testing system according to claim 5, characterized in that it also includes a third temperature sensor (34), an exhaust valve (35) and a liquid level gauge (36); the third temperature sensor (34) is used to collect the oil temperature in the oil tank (1); the exhaust valve (35) is arranged on the oil tank (1), and is used to exhaust and reduce the pressure of the oil tank (1), and the liquid level gauge (36) is used to Used to collect the liquid level signal of the oil in the oil tank (1). 7. A high-speed switching valve performance testing system according to claim 6, characterized in that it further comprises a second filter (33); the second filter (33) is set between the quantitative hydraulic pump (32) and Between the oil tanks (1), it is used to filter the oil entering the quantitative hydraulic pump (32). 8. A high-speed switching valve performance testing system according to claim 1, characterized in that, when the three-way valve is tested, the first two-position three-way electromagnetic reversing valve (12) is powered off, and the first stop valve (15 ) is open, and the second shut-off valve (16) is closed. 9. A high-speed on-off valve performance testing system according to claim 1, characterized in that, when the two-way valve is tested, the first two-position three-way electromagnetic reversing valve (12) is energized, and the first stop valve (15) closed, the second shut-off valve (16) is opened.

Images