Servo hydraulic test bench station

Abstract

The utility model relates to a servo hydraulic test bench station, which comprises an oil tank, a servo pilot pump set, a servo main pump set and a pressure valve test fixture, one end of the servo pilot pump set and one end of the servo main pump set are connected into the oil tank, the other end of the servo pilot pump set is connected into a pilot oil inlet, the other end of the servo main pump set is connected into a main oil inlet, and the pressure valve test fixture is connected into the oil tank. The pilot oil return opening is connected into the oil tank through a pilot oil return way, a first pressure sensor is sequentially connected to the pilot oil inlet way in series, a second pressure sensor is connected to the main oil inlet way in series, and the first pressure sensor is used for transmitting pressure signals of the pilot oil inlet way to the servo pilot pump set. The second pressure sensor is used for transmitting a main oil inlet path pressure signal to the servo main pump set. According to the utility model, the servo pilot pump set and the servo main pump set adopt the variable pump as a power source, so that for the main oil inlet path and the pilot oil inlet path, the generated heat is lower, and the test efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic testing, and in particular relates to a servo hydraulic testing station. Background Art

[0002] In the traditional hydraulic test bench used to test the performance of hydraulic valves, the pilot oil inlet and main oil inlet usually use ordinary three-phase asynchronous motors to drive constant pressure variable pumps or fixed displacement pumps. When testing the performance of hydraulic valves (pressure difference and leakage, analyzing the cause of failure, etc.), first of all, traditional motors have high energy consumption, low efficiency, high power consumption, and fast oil temperature rise. Due to the shortage of water resources on site, it is not convenient to install water coolers and air coolers on the test bench. If the oil temperature needs to be lowered, the oil tank will be made larger, and the equipment will occupy a large space.

[0003] Secondly, in the pilot oil inlet and the main oil inlet, the pressure must be set using a proportional pressure valve, and the flow must be set using a proportional flow valve, which makes the oil circuit fittings more complicated and more difficult to control.

[0004] Third, during testing, in addition to testing the hydraulic valve, it is also necessary to be able to test whether the various characteristic parameters of the servo hydraulic configuration (servo motor, gear pump and driver) meet the requirements, but traditional hydraulic test benches do not have this function. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a servo hydraulic test station, which sets a servo pilot pump group and a servo main pump group as power sources, does not need to use a proportional pressure valve, the servo pilot pump group and the servo main pump group can automatically adjust the pressure, there is no pressure loss, and the heat generation is small, so the energy saving effect is good and the test efficiency is high.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A servo-hydraulic test bench station includes an oil tank, a servo pilot pump set, a servo main pump set, and a pressure valve test fixture. The pressure valve test fixture has a pilot oil inlet, a pilot oil return port, a main oil inlet, and a main oil return port. One end of both the servo pilot pump set and the servo main pump set is connected into the oil tank. The other end of the servo pilot pump set is connected to the pilot oil inlet through a pilot oil inlet line. The other end of the servo main pump set is connected to the main oil inlet through a main oil inlet line. The pilot oil return port is connected to the oil tank through a pilot oil return line. The main oil return port is connected to the pilot oil return line through a main oil return line, and the main oil return line is connected to the servo main pump set. A first pressure sensor is connected in series on the pilot oil inlet line. A second pressure sensor is connected in series on the main oil inlet line. The first pressure sensor is used to detect the pressure of the pilot oil inlet line and transmit the pilot oil inlet line pressure signal to the servo pilot pump set. The second pressure sensor is used to detect the pressure of the main oil inlet line and transmit the main oil inlet line pressure signal to the servo main pump set.

[0008] Further, the main oil return line is connected to the servo main pump set through a second safety relief valve. A first safety relief valve is connected in series on the pilot oil inlet line, and one end of the first safety relief valve is connected into the oil tank.

[0009] Further, a pilot oil inlet line pressure gauge and a pilot oil inlet line flow meter are connected in series on the pilot oil inlet line. A main oil inlet line pressure gauge and a main oil inlet line flow meter are also connected in series on the main oil inlet line.

[0010] Further, the servo main pump set includes a servo main motor oil pump and a servo main motor driver. One end of the servo main motor oil pump is connected into the oil tank. The second pressure sensor is electrically connected to the servo main motor driver. The servo main motor driver is electrically connected to the servo main motor oil pump. The servo main motor driver is used to receive the main oil inlet line pressure signal and control the rotation speed of the servo main motor oil pump.

[0011] Further, the servo pilot pump set includes a servo pilot motor oil pump and a servo pilot motor driver. One end of the servo pilot motor oil pump is connected into the oil tank. The first pressure sensor is electrically connected to the servo pilot motor driver. The servo pilot motor driver is electrically connected to the servo pilot motor oil pump. The servo pilot motor driver is used to receive the pilot oil inlet line pressure signal and control the rotation speed of the servo pilot motor oil pump.

[0012] Further, an oil return filter, an air filter, a liquid level switch, and an oil level gauge are provided on the oil tank. The oil return filter is connected to the end of the pilot oil return line.

[0013] Further, it further includes a host computer, which is connected to the servo main motor driver and the servo pilot motor driver, and is used to provide a pressure and flow signal of 0-10V to the servo main motor driver and the servo pilot motor driver.

[0014] Further, the pressure valve test fixture includes a test valve block, on which a pilot oil inlet, a pilot oil return port, a main oil inlet, and a main oil return port are provided. The pilot oil inlet is connected to the pilot oil inlet passage, the pilot oil return port is connected to the pilot oil return passage, the main oil inlet is connected to the main oil inlet passage, and the main oil return port is connected to the main oil return passage.

[0015] Further, an actuator first oil inlet and outlet and an actuator second oil inlet and outlet are also provided on the test valve block. The main oil inlet, the actuator first oil inlet and outlet, the actuator second oil inlet and outlet, and the main oil return port are sequentially communicated, or the main oil inlet, the actuator second oil inlet and outlet, the actuator first oil inlet and outlet, and the main oil return port are sequentially communicated; a hydraulic motor is connected in series between the actuator first oil inlet and outlet and the actuator second oil inlet and outlet.

[0016] Further, the pressure valve test fixture further includes a hydraulic motor, which is connected to the actuator first oil inlet and outlet, the actuator second oil inlet and outlet, and the main oil return passage.

[0017] Due to the adoption of the above technical solution, the utility model has the following advantages and effects:

[0018] (1) For a servo hydraulic test station provided by the utility model, since the servo motor itself has high efficiency and small energy loss, the servo pump can provide pressure and flow as needed, without pressure loss and little heat generated, so the oil temperature of the oil tank will not be very high.

[0019] (2) For a servo hydraulic test station provided by the utility model, by using variable pumps as the power sources for the oil pumps of the servo pilot pump group and the servo main pump group, for the power sources of the main oil inlet passage and the pilot oil inlet passage, it is more energy-saving, generates less heat, and has better effects. This is because of the characteristics of the variable pump. It can be set that when the variable pump reaches the set pressure, its flow rate becomes smaller, that is, the displacement of the oil pump becomes smaller. In this way, the motor torque reaching the set pressure decreases, the motor speed becomes smaller, and therefore, the motor power becomes smaller, and the energy-saving effect is more obvious; at the same time, the PLC controller performs automatic control. Compared with the original traditional motor oil pump configuration, the energy-saving effect can reach more than 50%, and automatic testing and recording can be realized, effectively improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the servo hydraulic test station of the utility model.

[0021] Figure 2 It is a schematic enlarged structure diagram of the first test valve block of the present utility model.

[0022] Figure 3 It is a schematic enlarged structure diagram of the second test valve block of the present utility model.

[0023] The reference numerals are as follows: 1 - oil drain ball valve; 2 - fuel tank; 3 - return oil filter; 4 - air filter; 5 - liquid level switch; 6 - oil level gauge; 7 - servo pilot pump set; 8 - servo main pump set; 901 - first safety relief valve; 902 - second safety relief valve; 1001 - first pressure sensor; 1002 - second pressure sensor; 1003 - third pressure sensor, 1004 - fourth pressure sensor, 1005 - fifth pressure sensor, 1006 - sixth pressure sensor, 1007 - seventh pressure sensor, 1008 - eighth pressure sensor, 1101 - pilot inlet oil circuit pressure gauge; 1102 - main inlet oil circuit pressure gauge; 1201 - pilot inlet oil circuit flowmeter; 1202 - main inlet oil circuit flowmeter; 1203 - second hydraulic motor oil circuit flowmeter, 1204 - main return oil circuit flowmeter, 1205 - first hydraulic motor oil circuit flowmeter; 1301 - main inlet first high-pressure ball valve; 1302 - main inlet second high-pressure ball valve, 1303 - main return first high-pressure ball valve; 1304 - main return second high-pressure ball valve; 1305 - main return third high-pressure ball valve; 1306 - main return fourth high-pressure ball valve; 1307 - main return fifth high-pressure ball valve; 1308 - main return sixth high-pressure ball valve; 1309 - main return seventh high-pressure ball valve; 1310 - main return eighth high-pressure ball valve; 1401 - pilot first high-pressure ball valve; 1402 - pilot second high-pressure ball valve; 1501 - first test valve block, 1502 - second test valve block, 1601 - first actuator hydraulic motor, 1602 - second actuator hydraulic motor; 17 - multi-way valve; 18 - measuring cup. Specific embodiments

[0024] The embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, so as to more clearly understand the purpose, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present utility model, but only to illustrate the essential spirit of the technical solution of the present utility model.

[0025] As Figure 1As shown in the figure. The utility model provides a servo hydraulic test bench station, which includes an oil tank 2, a servo pilot pump group 7, a servo main pump group 8 and a pressure valve test fixture. The pressure valve test fixture has a pilot oil inlet, a pilot oil return port, a main oil inlet and a main oil return port. One end of the servo pilot pump group 7 and the servo main pump group 8 is connected into the oil tank 2, and an oil drain ball valve 1 is arranged at the bottom of the oil tank; the other end of the servo pilot pump group 7 is connected to the pilot oil inlet through a pilot oil inlet passage, the other end of the servo main pump group 8 is connected to the main oil inlet through a main oil inlet passage, the pilot oil return port is connected to the oil tank 2 through a pilot oil return passage, the main oil return port is connected to the pilot oil return passage through a main oil return passage, and the main oil return passage is connected to the servo main pump group 8; a first pressure sensor 1001 is connected in series on the pilot oil inlet passage, a second pressure sensor 1002 is connected in series on the main oil inlet passage. The first pressure sensor 1001 is used to detect the pressure of the pilot oil inlet passage and transmit the pressure signal of the pilot oil inlet passage to the servo pilot pump group 7, and the second pressure sensor 1002 is used to detect the pressure of the main oil inlet passage and transmit the pressure signal of the main oil inlet passage to the servo main pump group 8. By setting two groups of power sources, namely the servo pilot pump group 7 and the servo main pump group 8, to be connected to the pressure valve test fixture, test power is provided for the pressure valve test fixture, and the test conduction of the actuator on the pressure valve test fixture is realized.

[0026] Furthermore, in order to control the fluid pressure of the oil passage and maintain stable pressure, the main oil return passage is connected to the servo main pump group 8 through a second safety relief valve 902. A first safety relief valve 901 is connected in series on the pilot oil inlet passage, and one end of the first safety relief valve 901 is connected to the oil tank 2. The first safety relief valve 901 and the second safety relief valve 902 automatically adjust the fluid pressure. When the pressure increases, the flow demand decreases, and the relief valve will open to return the excess flow to the oil tank 2 to ensure that the inlet pressure, that is, the outlet pressure of the pump, is constant.

[0027] Furthermore, in order to realize the pressure and flow monitoring of the pilot oil inlet passage and the main oil inlet passage, a pilot oil inlet passage pressure gauge 1101 and a pilot oil inlet passage flow meter 1201 are also connected in series on the pilot oil inlet passage, and a main oil inlet passage pressure gauge 1102 and a main oil inlet passage flow meter 1202 are also connected in series on the main oil inlet passage.

[0028] Furthermore, the servo main pump group 8 includes a servo main motor oil pump and a servo main motor driver. One end of the servo main motor oil pump is connected to the oil tank 2. The servo main motor driver is electrically connected to the second pressure sensor 1002 and the servo main motor oil pump. The servo main motor driver is used to receive the main oil inlet passage pressure signal to control the rotation speed of the servo main motor oil pump. The second pressure sensor 1002 is arranged on the main oil passage to monitor the pressure of the main oil inlet passage, and feedback the main oil passage pressure signal to the servo main motor driver, and the servo main motor driver adjusts and controls the servo motor of the servo main motor oil pump.

[0029] Further, the servo pilot pump set 7 includes a servo pilot motor oil pump and a servo pilot motor driver. One end of the servo pilot motor oil pump is connected to the oil tank 2. The servo pilot motor driver is electrically connected to the first pressure sensor 1001 and the servo pilot motor oil pump. The servo pilot motor driver is used to receive the pilot inlet oil circuit pressure signal to control the rotation speed of the servo pilot motor oil pump. The first pressure sensor 1001 is arranged on the pilot oil circuit to monitor the pressure of the pilot inlet oil circuit, and feedback the pilot inlet oil circuit pressure signal to the servo pilot motor driver. The servo pilot motor driver adjusts and controls the servo motor of the servo pilot motor oil pump.

[0030] Further, a temperature sensor, an oil return filter 3, an air filter 4, a liquid level switch 5 and an oil level gauge 6 are arranged on the oil tank 2. The oil return filter 3 is connected to the end of the pilot oil return circuit.

[0031] Specifically, the liquid level switch 5 and the oil level gauge 6 are used for detecting the oil level of the oil tank 2. The temperature sensor is used for monitoring the temperature of the oil in the oil tank 2. The oil return filter 3 is used for filtering impurities in the oil return circuit. The air filter 4 is used for filtering the air entering the oil tank 2. The oil level gauge 6 and the temperature sensor can automatically detect and give an alarm. When the temperature exceeds the preset value or the liquid level exceeds the preset value, the oil level gauge 6 or the temperature sensor will trigger an alarm signal.

[0032] Further, it also includes a host computer, which is connected to the servo main motor driver and the servo pilot motor driver. The host computer is used to provide a 0-10V pressure and flow signal to the servo main motor driver and the servo pilot motor driver.

[0033] The host computer is a PLC controller. The PLC controller can program the action execution sequence according to the test action requirements to complete the required test work. The host computer provides the 0-10V pressure and flow signals required for the test. The pressure and flow signals are respectively transmitted to the servo main motor driver or the servo pilot motor driver. The servo main motor driver or the servo pilot motor driver transmits the flow signal to the servo main motor encoder or the servo pilot motor encoder to control the rotation speed of the main motor or the pilot motor. The magnitude of the motor rotation speed is actually the magnitude of the flow rate. The pressure signal is compared with the feedback signal of the pressure sensor installed on the pressure pipeline. When the feedback signal of the pressure sensor is less than the given pressure signal, the motor rotation speed runs at the set rotation speed. When the feedback signal of the pressure sensor reaches the given pressure signal, the motor rotation speed will automatically slow down until it slows down to the rotation speed when maintaining the set pressure value.

[0034] Further, the pressure valve test fixture includes a test valve block. The test valve block is provided with a pilot inlet oil port, a pilot oil return port, a main inlet oil port and a main oil return port. The pilot inlet oil port is connected to the pilot inlet oil circuit. The pilot oil return port is connected to the pilot oil return circuit. The main inlet oil port is connected to the main inlet oil circuit. The main oil return port is connected to the main oil return circuit.

[0035] As Figure 3 shown. Specifically, the test valve block includes a first test valve block 1501 and a second test valve block 1502. The pilot oil inlet of the first test valve block 1501 and the pilot oil inlet of the second test valve block 1502 are connected in parallel to the pilot oil inlet passage. The pilot oil outlet of the first test valve block and the pilot oil outlet of the second test valve block are connected in parallel to the pilot oil outlet passage. The main oil inlet of the first test valve block and the main oil inlet of the second test valve block are connected in parallel to the main oil inlet passage. The main oil outlet of the first test valve block and the main oil outlet of the second test valve block are connected in parallel to the main oil outlet passage.

[0036] In the present utility model, the first test valve block 1501 is provided with a pilot oil inlet X1, a pilot oil return port Y1, a main oil inlet P1, and a main oil return port T1. The pilot oil inlet X1 is connected to the pilot oil inlet passage through a first high-pressure pilot ball valve 1401. The pilot oil return port Y1 is connected to the pilot oil return passage. The main oil inlet P1 is connected to the main oil inlet passage through a first high-pressure main oil inlet ball valve 1301. The main oil return port T1 is connected to the main oil return passage. The second test valve block 1502 is provided with a pilot oil inlet X2, a pilot oil return port Y2, a main oil inlet P2, and a main oil return port T2. The pilot oil inlet X2 is connected to the pilot oil inlet passage through a second high-pressure pilot ball valve 1402. The pilot oil return port Y2 is connected to the pilot oil return passage. The main oil inlet P2 is connected to the main oil inlet passage through a second high-pressure main oil inlet ball valve 1302. The main oil return port T2 is connected to the main oil return passage; the pilot oil inlet X1 and the pilot oil inlet X2 are connected in parallel to form a pilot oil inlet, and the pilot oil return port Y1 and the pilot oil return port Y2 are connected in parallel to form a pilot oil return port; the main oil inlet P1 and the main oil inlet P2 are connected in parallel to form a main oil inlet, and the main oil return port T1 and the main oil return port T1 are connected in parallel to form a main oil return port.

[0037] Further, the test valve block is further provided with a first actuator oil inlet / outlet and a second actuator oil inlet / outlet. The main oil inlet, the first actuator oil inlet / outlet, the second actuator oil inlet / outlet, and the main oil return port are sequentially communicated, or the main oil inlet, the second actuator oil inlet / outlet, the first actuator oil inlet / outlet, and the main oil return port are sequentially communicated; a hydraulic motor is connected in series between the first actuator oil inlet / outlet and the second actuator oil inlet / outlet.

[0038] Specifically, in the present utility model, the first test valve block 1501 is further provided with a first actuator oil inlet / outlet A1 and a second actuator oil inlet / outlet B1. When the electromagnet of the first test valve block 1501 acts, the hydraulic oil communicates with the main oil inlet P1, the first actuator oil inlet / outlet A1, the second actuator oil inlet / outlet B1, and the main oil return port T1, or communicates with the main oil inlet P1, the second actuator oil inlet / outlet B1, the first actuator oil inlet / outlet A1, and the main oil return port T1.

[0039] The second test valve block 1502 is also provided with an actuator first oil inlet / outlet A2 and an actuator second oil inlet / outlet B2; when the electromagnet of the second test valve block 1502 acts, the hydraulic oil communicates with the main oil inlet P2, the actuator first oil inlet / outlet A2, the actuator second oil inlet / outlet B2 and the main oil return port T2 or communicates with the main oil inlet P2, the actuator second oil inlet / outlet B2, the actuator first oil inlet / outlet A2 and the main oil return port T2.

[0040] Further, the pressure valve test fixture further includes a hydraulic motor, and the hydraulic motor is connected to the actuator first oil inlet, the actuator second oil inlet and the main oil return circuit.

[0041] Specifically, the main oil return port T1 of the first test valve block 1501 is communicated with the main oil return port T2 of the second test valve block 1502. A main oil return first high-pressure ball valve 1303 and a main oil return second high-pressure ball valve 1304 are respectively connected in series between the main oil return port T1 of the first test valve block 1501 and the main oil return port T2 of the second test valve block 1502. A multi-way valve 17 is connected between the main oil return first high-pressure ball valve 1303 and the main oil return second high-pressure ball valve 1304. One end of the multi-way valve 17 is connected to a measuring cup 18, and the measuring cup 18 is used to measure the leaked oil fluid when testing the leakage of the proportional valve. The other end of the multi-way valve 17 is connected to the main oil return circuit after being connected in series with a main oil return flowmeter 1204.

[0042] The other end of the main oil return first high-pressure ball valve 1303 is simultaneously connected to a fifth pressure sensor 1005, and the other end of the main oil return second high-pressure ball valve 1304 is simultaneously connected to a sixth pressure sensor 1006. A first actuator hydraulic motor 1601 is connected in series between the first actuator oil inlet A1 and the first actuator oil inlet B1. A third pressure sensor 1003, a main oil return third high-pressure ball valve 1305 and a first hydraulic motor oil flowmeter 1205 are connected in series on the pipeline between the first actuator oil inlet A1 and the first actuator hydraulic motor 1601.

[0043] A fourth pressure sensor 1004 and a fifth high-pressure ball valve 1307 for main return oil are connected in series on the pipeline between the oil inlet B1 of the first actuator and the hydraulic motor 1601 of the first actuator. One end of the hydraulic motor 1601 of the first actuator is connected to the main return oil circuit at the same time. A fourth high-pressure ball valve 1306 for main return oil is connected in series between the first hydraulic motor oil flowmeter 1205 and the main return oil circuit. A second hydraulic motor 1602 of the second actuator is connected between the oil inlet A2 of the second actuator and the oil inlet B2 of the second actuator of the second test valve block 1502. A seventh pressure sensor 1007, a sixth high-pressure ball valve 1308 for main return oil and a second hydraulic motor oil flowmeter 1203 are connected in series on the pipeline between the oil inlet A2 of the second actuator and the hydraulic motor 1602 of the second actuator. An eighth pressure sensor 1008, a seventh high-pressure ball valve 1309 for main return oil are connected in series on the pipeline between the oil inlet B2 of the second actuator and the hydraulic motor 1602 of the second actuator. A eighth high-pressure ball valve 1310 for main return oil is connected in series between the second hydraulic motor oil flowmeter 1203 and the main return oil circuit.

[0044] The first hydraulic motor and the second hydraulic motor act as an actuator to adjust the load. The pressure drop of the oil pressure passing through the hydraulic motor 1601 of the first actuator can be detected by the third pressure sensor 1003 and the fourth pressure sensor 1004. The pressure drop of the oil pressure passing through the hydraulic motor 1602 of the second actuator can be detected by the seventh pressure sensor 1007 and the eighth pressure sensor 1008.

[0045] In the utility model, the upper computer provides a 0-10V pressure and flow signal required for testing to control the motor speed of the servo pump set. The size of the motor speed is actually the size of the flow. By comparing the pressure signal with the feedback signal of the pressure sensor on the oil circuit, when the feedback signal of the pressure sensor is less than the given pressure signal, the motor speed runs at the set speed; when the feedback signal of the pressure sensor reaches the given pressure signal, the motor speed will automatically slow down until it slows down to the speed when the set pressure value is maintained.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A servo-hydraulic test station, characterized in that: It includes a fuel tank, a servo pilot pump set, a servo main pump set and a pressure valve test fixture. The pressure valve test fixture has a pilot oil inlet, a pilot oil return port, a main oil inlet and a main oil return port. One end of both the servo pilot pump set and the servo main pump set is connected into the fuel tank. The other end of the servo pilot pump set is connected to the pilot oil inlet through a pilot oil supply line. The other end of the servo main pump set is connected to the main oil inlet through a main oil supply line. The pilot oil return port is connected to the fuel tank through a pilot oil return line. The main oil return port is connected to the pilot oil return line through a main oil return line, and the main oil return line is connected to the servo main pump set. A first pressure sensor is connected in series on the pilot oil supply line. A second pressure sensor is connected in series on the main oil supply line. The first pressure sensor is used to detect the pressure of the pilot oil supply line and transmit the pilot oil supply line pressure signal to the servo pilot pump set. The second pressure sensor is used to detect the pressure of the main oil supply line and transmit the main oil supply line pressure signal to the servo main pump set.

2. A servo-hydraulic test station according to claim 1, wherein: The main oil return line is connected to the servo main pump set through a second safety relief valve. A first safety relief valve is connected in series on the pilot oil supply line, and one end of the first safety relief valve is connected to the fuel tank.

3. A servo-hydraulic test station according to claim 2, characterized in that: A pilot oil supply line pressure gauge and a pilot oil supply line flow meter are also connected in series on the pilot oil supply line. A main oil supply line pressure gauge and a main oil supply line flow meter are also connected in series on the main oil supply line.

4. A servo-hydraulic test station according to claim 1 or 3, characterized in that: The servo main pump set includes a servo main motor oil pump and a servo main motor driver. One end of the servo main motor oil pump is connected to the fuel tank. The servo main motor driver is electrically connected to the second pressure sensor and the servo main motor oil pump. The servo main motor driver is used to receive the main oil supply line pressure signal to control the rotation speed of the servo main motor oil pump.

5. A servo-hydraulic test station according to claim 4, characterized in that: The servo pilot pump set includes a servo pilot motor oil pump and a servo pilot motor driver. One end of the servo pilot motor oil pump is connected to the fuel tank. The servo pilot motor driver is electrically connected to the first pressure sensor and the servo pilot motor oil pump. The servo pilot motor driver is used to receive the pilot oil supply line pressure signal to control the rotation speed of the servo pilot motor oil pump.

6. A servo-hydraulic test station according to claim 5, characterized in that: A return oil filter, an air filter, a liquid level switch and an oil level gauge are arranged on the fuel tank. The return oil filter is connected to the end of the pilot oil return line.

7. A servo-hydraulic test station according to claim 6, characterized in that: It also includes a host computer, which is connected to the servo main motor driver and the servo pilot motor driver. The host computer is used to provide a 0-10V pressure and flow signal to the servo main motor driver and the servo pilot motor driver.

8. A servo-hydraulic test station according to claim 7, characterized in that: The pressure valve test fixture includes a test valve block. The pilot oil inlet, the pilot oil return port, the main oil inlet and the main oil return port are arranged on the test valve block. The pilot oil inlet is connected to the pilot oil supply line. The pilot oil return port is connected to the pilot oil return line. The main oil inlet is connected to the main oil supply line. The main oil return port is connected to the main oil return line.

9. A servo-hydraulic test bench station according to claim 8, characterized in that: An oil inlet and outlet for the first actuator and an oil inlet and outlet for the second actuator are further provided on the test valve block. The main oil inlet, the oil inlet and outlet for the first actuator, the oil inlet and outlet for the second actuator, and the main oil return port are sequentially communicated, or the main oil inlet, the oil inlet and outlet for the second actuator, the oil inlet and outlet for the first actuator, and the main oil return port are sequentially communicated. A hydraulic motor is connected in series between the oil inlet and outlet for the first actuator and the oil inlet and outlet for the second actuator.

10. A servo-hydraulic test station according to claim 9, characterized in that: The pressure valve test fixture further includes a hydraulic motor, and the hydraulic motor is connected to the oil inlet and outlet for the first actuator, the oil inlet and outlet for the second actuator, and the main oil return circuit.

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