CN115853860A - A servo valve testing device and method based on integrated oil circuit block testing technology - Google Patents

Abstract

The invention relates to a servo valve testing device and method based on integrated oil circuit block testing technology. In the testing circuit, according to the test requirements, the tested valve is provided with two specifications of no-load high flow and no-load small flow, including direction Type cover plate type cartridge valve control assembly, pressure type cover plate type cartridge valve control assembly, electromagnetic reversing valve, temperature sensor, pressure sensor and flow sensor, the three direction type cover plate type cartridge valve control components are respectively connected by Ports A, B, and P of the test valves, and the pressure-type cover-type cartridge valve control component are connected to the T-port of the tested valve through the fourth-direction type cover-type cartridge valve control component; and pressure sensors are installed on the connecting oil lines , a pressure sensor and a temperature sensor are arranged on the connecting oil circuit between the pressure-type cover-type cartridge valve control component and the fourth-direction type cover-type cartridge valve control component, and the first-direction type cover-type cartridge valve control component and A temperature sensor is installed on the connecting oil line between the P ports of the tested valve.

Description

A servo valve testing device and method based on integrated oil circuit block testing technology

technical field

The invention relates to the technical field of hydraulic valve testing, in particular to a servo valve testing device and method based on integrated oil circuit block testing technology.

Background technique

With the increasing demand for servo valves in various industries at home and abroad in recent years, more models of servo valves have been derived accordingly. As a high-precision hydraulic component, servo valves have many performance indicators to be tested. Most of the traditional test benches are connected by pipelines. There are many pipeline joints and manual ball valves, which are prone to leaking, dripping and leaking. The threads on the handles of the ball valves work all the year round, which is easy to generate redundant substances into the pipelines, which increases the cost and difficulty of equipment management. The traditional test bench needs to meet the test requirements through various adapter plates and manual switching of the stop valve. What’s more, it needs to replace different test benches to test the performance index of the servo valve, which seriously affects the production efficiency and increases the generation of redundant materials during the turnover process. Therefore, the automated integrated oil circuit block test device is imminent.

Contents of the invention

The technical problem to be solved by the present invention is to provide a servo valve testing device and method for the integrated oil circuit block testing technology of servo valve performance, which is used to overcome the above existing technical defects, and no longer adjust the system through the throttle valve. Back pressure, no longer through manual ball valve switching to achieve different performance index tests, etc., use electrical control to realize automatic test of servo valve performance indicators, reduce process disassembly and turnover, eliminate redundant materials, and improve production efficiency.

In order to achieve the above purpose, the technical solution of the present invention is: a servo valve testing device based on the integrated oil circuit block testing technology. The flow rate of various specifications, the device is composed of directional cover plate type cartridge valve control assembly, pressure type cover plate type cartridge valve control assembly, electromagnetic reversing valve, test auxiliary device, temperature sensor, pressure sensor and flow sensor. The control components of the one, two and three direction type cover plate cartridge valves are respectively connected to port A, B port and P port of the tested valve, and the control components of the pressure type cover plate type cartridge valve pass through the fourth direction type cover plate type cartridge valve. The control component is connected to the T port of the valve under test; and pressure sensors are set on the connecting oil circuit, and the pressure sensor is set on the connecting oil circuit between the control component of the pressure-type cover-type cartridge valve and the control component of the fourth-direction type cover-type cartridge valve. Sensors and temperature sensors, a temperature sensor is installed on the connecting oil path between the first direction type cover plate cartridge valve control component and the P port of the tested valve; the first direction type cover plate type cartridge valve control component is connected to the pumping station; The test circuit of the second direction type cover plate cartridge valve control assembly and the third direction type cover plate type cartridge valve control assembly are connected in series with the first electromagnetic reversing valve, the second electromagnetic reversing valve, the fourth direction type A third electromagnetic reversing valve and a fourth electromagnetic reversing valve are connected in series in the circuit of the control assembly of the cover plate cartridge valve, and the connecting oil circuit between the first electromagnetic reversing valve and the second electromagnetic reversing valve is provided with a flow As for the sensor, a flow sensor is arranged on the connecting oil path between the control assembly of the second directional cover plate cartridge valve and the control assembly of the third directional cover plate cartridge valve.

Further, the test auxiliary device includes a special valve block and a pressure test joint, and the special valve block and the pressure test joint are arranged on the test circuit.

Further, the directional cover plate type cartridge valve control assembly, the pressure type cover plate type cartridge valve control assembly, electromagnetic reversing valve, test auxiliary device, temperature sensor, pressure sensor and flow sensor are integrated together.

A servo valve testing method adopts a servo valve testing device based on the integrated oil block testing technology. In the testing circuit, the tested valve is provided with two specifications of no-load high flow and no-load small flow according to the test requirements. When testing the performance of the tested valve, first energize the solenoid valve DT1 in the control assembly of the first-direction cover-type cartridge valve and the solenoid valve DT9 in the control assembly of the fourth-direction cover-type cartridge valve. When the flow rate is high, energize the solenoid valve DT5 in the control assembly of the second-direction cover-type cartridge valve and the solenoid valve DT6 in the control assembly of the third-direction cover-type cartridge valve; The electromagnetic reversing valve DT3 and the second electromagnetic reversing valve DT4 are energized.

Further, when it is necessary to conduct a no-load high-flow characteristic test:

Step 1: Turn on the power switch of the pumping station, energize the solenoid valve DT1 in the control assembly of the first-direction cover-type cartridge valve, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the solenoid valve DT5 of the control assembly of the second-direction cover-type cartridge valve and the solenoid valve DT6 of the control assembly of the third-direction cover-type cartridge valve, so that ports A and B of the tested valve have Large flow test conditions;

Step 3: energize the solenoid valve DT9 in the control assembly of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve communicates with the control component of the pressure-type cover-type cartridge valve;

Step 4: Adjust the proportional pressure valve in the control assembly of the pressure-type cover plate cartridge valve, and collect data from the temperature sensor, pressure sensor, and flow sensor respectively.

Further, when it is necessary to test the no-load and small flow characteristics:

Step 1: Start the power switch of the pumping station, energize the solenoid valve DT1 of the first direction type cover plate cartridge valve control component, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the electromagnetic valve DT3 in the first electromagnetic directional valve and the electromagnetic valve DT4 in the second electromagnetic directional valve, so that the A port and B port of the tested valve have small flow test conditions;

Step 3: energize the solenoid valve DT9 in the control assembly of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve communicates with the control component of the pressure-type cover-type cartridge valve;

Step 4: Adjust the proportional pressure valve in the control assembly of the pressure-type cover plate cartridge valve, and collect data from the temperature sensor, pressure sensor, and flow sensor respectively.

Further, when resolution and zero characteristic tests are required:

Step 1: Turn on the power switch of the pumping station, energize the solenoid valve DT1 in the control assembly of the first-direction cover-type cartridge valve, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the first electromagnetic directional valve DT3 and the second electromagnetic directional valve DT4, so that the A port and B port of the tested valve have small flow test conditions;

Step 3: energize the solenoid valve DT9 in the control assembly of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve communicates with the control component of the pressure-type cover-type cartridge valve;

Step 4: Adjust the proportional pressure valve in the control assembly of the pressure-type cover plate cartridge valve, and collect data from the temperature sensor, pressure sensor, and flow sensor respectively.

Further, when a pressure gain test is required:

Step 1: Turn on the power switch of the pumping station, energize the solenoid valve DT1 in the control assembly of the first-direction cover-type cartridge valve, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the solenoid valve DT9 in the control assembly of the fourth direction type cover plate cartridge valve, so that the T port of the tested valve communicates with the control component of the pressure type cover plate type cartridge valve;

Step 3: Adjust the proportional pressure valve in the control assembly of the pressure-type cover plate cartridge valve, and collect data from the temperature sensor and the pressure sensor respectively.

Further, when an endoleak test is required:

Step 1: Turn on the power switch of the pumping station, energize the solenoid valve DT1 in the control assembly of the first-direction cover-type cartridge valve, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the third electromagnetic directional valve DT7 and the fourth electromagnetic directional valve DT8, so that the T port of the tested valve has a small flow test condition;

Step 3: collect the data of temperature sensor, pressure sensor and flow sensor respectively, and collect the internal leakage data of the tested valve.

The beneficial effects of the present invention are:

The servo valve testing device and method of the integrated oil circuit block testing technology for servo valve performance of the present invention can overcome the existing technical defects, no longer adjust the back pressure of the system through the throttle valve, and no longer realize the difference through manual ball valve switching. Performance index test, etc., use electrical control to realize automatic test of servo valve performance index, reduce process disassembly and turnover, eliminate redundant materials, and improve production efficiency.

Description of drawings

Fig. 1 is the device hydraulic principle diagram that is used for servo valve test of the present invention;

Fig. 2 is a schematic structural diagram of a device for servo valve testing of the present invention;

In the figure: 1-1-0, the control assembly of the directional cover plate type cartridge valve; 1-1-1, the control assembly of the first directional cover plate type cartridge valve; 1-1-2, the second direction type cover Plate type cartridge valve control assembly; 1-1-3, third direction cover plate type cartridge valve control assembly; 1-1-4, fourth direction type cover plate type cartridge valve control assembly; 1-2- 1. Pressure type cover plate cartridge valve control assembly; 1-3-0, electromagnetic directional valve; 1-3-1, first electromagnetic directional valve; 1-3-2, second electromagnetic directional valve; 1-3-3, the third electromagnetic directional valve; 1-3-4, the fourth electromagnetic directional valve; 1-4-0, test auxiliary device; 1-4-1, special valve block; 1-4- 2. Pressure measuring joints; 1-5-1, 1-5-2, first and second temperature sensors; 1-6-1～1-6-5, first to fifth pressure sensors; 1-7-1 , 1-7-2, first and second flow sensors.

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 making creative efforts belong to the protection scope of the present invention.

As shown in Figures 1 and 2, the present invention provides a servo valve testing device based on integrated oil circuit block testing technology, which consists of integrated directional cover plate type cartridge valve control components 1-1-0, pressure Cover plate cartridge valve control assembly 1-2-1, electromagnetic reversing valve 1-3-0, test auxiliary device 1-4-0, temperature sensor 1-5-0, pressure sensor 1-6-0 and flow rate Sensor 1-7-0 composition.

The directional cover plate type cartridge valve control assembly 1-1-0 includes the first directional cover plate type cartridge valve control assembly 1-1-1, the second directional cover plate type cartridge valve control assembly 1-1- 2. The third direction type cover plate cartridge valve control assembly 1-1-3, the fourth direction type cover plate type cartridge valve control assembly 1-1-4. The first direction type cover plate type cartridge valve control assembly 1-1-1 is connected to the test circuit, and provides high pressure hydraulic oil to the test circuit through the solenoid valve DT1 connected to the start pump; the second direction type cover plate type cartridge valve control assembly 1 -1-2 is connected to the A port of the tested valve, and the solenoid valve DT5 is energized to make the A port of the tested valve meet the high flow test conditions; the third directional cover plate type cartridge valve control component 1-1-3 is connected to the tested valve Port B is energized through the solenoid valve DT6, so that the B port of the tested valve has a large flow test condition; the pressure type cover type cartridge valve control component 1-2-1 passes the fourth direction type cover type cartridge valve control component 1 -1-4 Connect the T port of the tested valve, and electrify through the solenoid valve DT9, so that the T port of the tested valve communicates with the control assembly 1-2-1 of the pressure type cover plate cartridge valve.

Electromagnetic reversing valve 1-3-0 comprises first electromagnetic reversing valve 1-3-1, second electromagnetic reversing valve 1-3-2, third electromagnetic reversing valve 1-3-3, fourth electromagnetic reversing valve Direction valve 1-3-4. The first electromagnetic reversing valve 1-3-1 and the second electromagnetic reversing valve 1-3-2 are connected in series to the control assembly 1-1-2 of the second direction type cover plate type cartridge valve and the third direction type cover plate In the test circuit of the cartridge valve control assembly 1-1-3, the third electromagnetic reversing valve 1-3-3 and the fourth electromagnetic reversing valve 1-3-4 are connected in series in the fourth direction type cover plate type plug-in valve. Installed in the circuit of the valve control assembly 1-1-4, and a pressure measuring joint 1- 4-2. A pressure measuring joint 1-4-2 is provided on the connecting oil circuit between the fourth electromagnetic reversing valve 1-3-4 and the second electromagnetic reversing valve 1-3-2. A second flow sensor 1-7-2 is provided on the connecting oil path between the first electromagnetic reversing valve 1-3-1 and the second electromagnetic reversing valve 1-3-2.

A first temperature sensor 1-5-1 and a first pressure sensor 1-6-1 are installed on the connecting oil path between the first directional cover plate type cartridge valve control assembly 1-1-1 and the P port of the tested valve ; A third pressure sensor 1-6-3 is provided on the connecting oil road between the second direction cover plate type cartridge valve control assembly 1-1-2 and the first electromagnetic directional valve 1-3-1; A fourth pressure sensor 1-6-4 is provided on the connecting oil path between the directional cover plate type cartridge valve control assembly 1-1-3 and the fourth electromagnetic reversing valve 1-3-4; the pressure type cover plate type A fifth pressure sensor 1-6-5 and a second temperature sensor are arranged on the connecting oil path between the cartridge valve control assembly 1-2-1 and the fourth directional cover plate type cartridge valve control assembly 1-1-4 1-5-2; the second pressure sensor 1-6-2 is provided on the connecting oil path between the control assembly 1-1-4 of the fourth direction type cover plate cartridge valve and the T port of the tested valve. A first flow sensor 1-7 is provided on the connecting oil path between the second directional cover plate type cartridge valve control assembly 1-1-2 and the third directional cover plate type cartridge valve control assembly 1-1-3 -1.

In this test circuit, according to the test requirements, the tested valve is provided with two specifications of no-load high flow and no-load small flow.

The device described in the present invention is used to test the performance of the servo valve, and the test method applicable to the measured object can be adopted:

When the no-load flow (large flow) characteristic test is required:

Step 1: Start the power switch of the pumping station, energize the solenoid valve DT1 in the first direction type cover plate cartridge valve control assembly 1-1-1, and provide high-pressure hydraulic oil to the test circuit;

Step 2: energize the solenoid valve DT5 of the second direction type cover type cartridge valve control assembly 1-1-2 and the solenoid valve DT6 of the third direction type cover type cartridge valve control assembly 1-1-3, Make the A port and B port of the tested valve have large flow test conditions;

Step 3: Power on the solenoid valve DT9 in the control module 1-1-4 of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve is connected to the pressure-type cover-type cartridge valve control component 1-2-1 connected;

Step 4: Adjust the proportional pressure valve in the pressure-type cover plate cartridge valve control assembly 1-2-1, and collect the first and second temperature sensors 1-5-1, 1-5-2, first to fifth Data in the pressure sensors 1-6-1 to 1-6-5 and the first flow sensor 1-7-1.

When the no-load flow (small flow) characteristic test is required:

Step 1: Start the power switch of the pumping station, energize the 1-1-1 solenoid valve DT1 of the first direction type cover-type cartridge valve control component, and provide high-pressure hydraulic oil to the test circuit;

Step 2: Power on the electromagnetic valve DT3 in the first electromagnetic directional valve 1-3-1 and the electromagnetic valve DT4 in the second electromagnetic directional valve 1-3-2, so that the A port and B port of the tested valve have small Flow test conditions;

Step 3: Power on the solenoid valve DT9 in the control module 1-1-4 of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve is connected to the pressure-type cover-type cartridge valve control component 1-2-1 connected;

Step 4: Adjust the proportional pressure valve in the pressure-type cover plate cartridge valve control assembly 1-2-1, and collect the first and second temperature sensors 1-5-1, 1-5-2, first to fifth Data in the pressure sensors 1-6-1 to 1-6-5 and the second flow sensor 1-7-2.

When resolution and zero characteristic testing is required:

Step 1: Start the power switch of the pumping station, energize the solenoid valve DT1 in the first direction type cover plate cartridge valve control assembly 1-1-1, and provide high-pressure hydraulic oil to the test circuit;

Step 2: Power on the electromagnetic valve DT3 in the first electromagnetic directional valve 1-3-1 and the electromagnetic valve DT4 in the second electromagnetic directional valve 1-3-2, so that the A port and B port of the tested valve have small Flow test conditions;

Step 3: Power on the solenoid valve DT9 in the control module 1-1-4 of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve is connected to the pressure-type cover-type cartridge valve control component 1-2-1 connected;

Step 4: Adjust the proportional pressure valve in the pressure-type cover plate cartridge valve control assembly 1-2-1, and collect the first and second temperature sensors 1-5-1, 1-5-2, first to fifth Data in the pressure sensors 1-6-1 to 1-6-5 and the second flow sensor 1-7-2.

When pressure gain testing is required:

Step 1: Start the power switch of the pumping station, energize the solenoid valve DT1 in the first direction type cover plate cartridge valve control assembly 1-1-1, and provide high-pressure hydraulic oil to the test circuit;

Step 2: Power on the solenoid valve DT9 in the control assembly 1-1-4 of the fourth-direction cover-type cartridge valve, so that the T port of the tested valve is connected to the pressure-type cover-type cartridge valve control assembly 1-2-1 connected;

Step 3: Adjust the proportional pressure valve in the pressure-type cover-type cartridge valve control assembly 1-2-1, and collect the first and second temperature sensors 1-5-1, 1-5-2, first, and second , Data in five pressure sensors 1-6-1, 1-6-2, 1-6-5.

When an endoleak test is required:

Step 1: Start the power switch of the pumping station, energize the solenoid valve DT1 in the first direction type cover plate cartridge valve control assembly 1-1-1, and provide high-pressure hydraulic oil to the test circuit;

Step 2: Power on the electromagnetic valve DT7 in the third electromagnetic directional valve 1-3-3 and the electromagnetic valve DT8 in the fourth electromagnetic directional valve 1-3-4, so that the T port of the tested valve has the small flow test condition ;

Step 3: collect the data of the first temperature sensor 1-5-1, the first and second pressure sensors 1-6-1, 1-6-2, and the second flow sensor 1-7-2 respectively, and collect the data of the tested valve Internal leakage data.

The above-mentioned steps collectively constitute a method for servo valve testing.

Claims (9)

1. The utility model provides a servo valve testing arrangement based on integrated oil circuit piece test technique, in test loop, according to the test requirement for the valve under test provide the flow of two kinds of specifications of unloaded large-traffic and unloaded little flow, its characterized in that: the device comprises a directional cover plate type cartridge valve control component, a pressure type cover plate type cartridge valve control component, an electromagnetic directional valve, a test auxiliary device, a temperature sensor, a pressure sensor and a flow sensor, wherein the first, second and third directional cover plate type cartridge valve control components are respectively connected with an A port, a B port and a P port of a tested valve, and the pressure type cover plate type cartridge valve control component is connected with a T port of the tested valve through a fourth directional cover plate type cartridge valve control component; pressure sensors are arranged on the connecting oil paths, a pressure sensor and a temperature sensor are arranged on the connecting oil path between the pressure type cover plate type cartridge valve control component and the fourth direction type cover plate type cartridge valve control component, and a temperature sensor is arranged on the connecting oil path between the first direction type cover plate type cartridge valve control component and the tested valve port P; the first direction cover plate type cartridge valve control assembly is connected with a pump station; the testing loop of the second direction type cover plate type cartridge valve control component and the testing loop of the third direction type cover plate type cartridge valve control component are connected with a first electromagnetic directional valve and a second electromagnetic directional valve in series, the loop of the fourth direction type cover plate type cartridge valve control component is connected with a third electromagnetic directional valve and a fourth electromagnetic directional valve in series, a flow sensor is arranged on a connecting oil path between the first electromagnetic directional valve and the second electromagnetic directional valve, and a flow sensor is arranged on a connecting oil path between the second direction type cover plate type cartridge valve control component and the third direction type cover plate type cartridge valve control component.

2. The servo valve testing device based on the integrated oil circuit block testing technology as claimed in claim 1, wherein: the test auxiliary device comprises a special valve block and a pressure measuring joint, and the special valve block and the pressure measuring joint are arranged on a test loop.

3. The servo valve testing device based on the integrated oil circuit block testing technology as claimed in claim 1, wherein: the direction type cover plate type cartridge valve control assembly, the pressure type cover plate type cartridge valve control assembly, the electromagnetic directional valve, the test auxiliary device, the temperature sensor, the pressure sensor and the flow sensor are integrated together.

4. A servo valve test method adopts a servo valve test device based on an integrated oil circuit block test technology, and is characterized in that: in the test loop, the flow of two specifications of no-load large flow and no-load small flow is provided for the tested valve according to the test requirement, when the performance of the tested valve is tested, firstly, a solenoid valve DT1 in a first direction type cover plate type cartridge valve control component and a solenoid valve DT9 in a fourth direction type cover plate type cartridge valve control component are electrified, and when the large flow is required, a solenoid valve DT5 in a second direction type cover plate type cartridge valve control component and a solenoid valve DT6 in a third direction type cover plate type cartridge valve control component are electrified; when a small flow is required, the first electromagnetic directional valve DT3 and the second electromagnetic directional valve DT4 are energized.

5. The servo valve testing method as recited in claim 4, wherein: when the no-load large flow characteristic test is required:

the method comprises the following steps: starting a power switch of a pump station, electrifying an electromagnetic valve DT1 in the first direction type cover plate type cartridge valve control assembly, and providing high-pressure hydraulic oil for a test loop;

step two: energizing a solenoid valve DT5 in the second direction type cover plate type cartridge valve control assembly and a solenoid valve DT6 in the third direction type cover plate type cartridge valve control assembly, so that the port A and the port B of the tested valve have high-flow test conditions;

step three: energizing an electromagnetic valve DT9 in the fourth direction type cover plate type cartridge valve control component to enable a T port of the tested valve to be communicated with the pressure type cover plate type cartridge valve control component;

step four: and adjusting a proportional pressure valve in the pressure type cover plate type cartridge valve control assembly, and respectively acquiring data in a temperature sensor, a pressure sensor and a flow sensor.

6. The servo valve testing method of claim 4, wherein: when an idle low flow characteristic test is required:

the method comprises the following steps: starting a power switch of a pump station, electrifying an electromagnetic valve DT1 of a first-direction cover plate type cartridge valve control assembly, and providing high-pressure hydraulic oil for a test loop;

step two: electrifying an electromagnetic valve DT3 in the first electromagnetic directional valve and an electromagnetic valve DT4 in the second electromagnetic directional valve, so that the port A and the port B of the tested valve have a small flow test condition;

step three: electrifying an electromagnetic valve DT9 in the fourth direction type cover plate type cartridge valve control component, so that the T port of the tested valve is communicated with the pressure type cover plate type cartridge valve control component;

step four: and adjusting a proportional pressure valve in the pressure type cover plate type cartridge valve control assembly, and respectively acquiring data in a temperature sensor, a pressure sensor and a flow sensor.

7. The servo valve testing method as recited in claim 4, wherein: when the resolution and zero characteristic test is required:

the method comprises the following steps: starting a power switch of a pump station, electrifying an electromagnetic valve DT1 in the first direction type cover plate type cartridge valve control assembly, and providing high-pressure hydraulic oil for a test loop;

step two: electrifying the first electromagnetic directional valve DT3 and the second electromagnetic directional valve DT4 to ensure that the port A and the port B of the tested valve have a small flow test condition;

step three: electrifying an electromagnetic valve DT9 in the fourth direction type cover plate type cartridge valve control component, so that the T port of the tested valve is communicated with the pressure type cover plate type cartridge valve control component;

step four: and adjusting a proportional pressure valve in the pressure type cover plate type cartridge valve control assembly, and respectively acquiring data in a temperature sensor, a pressure sensor and a flow sensor.

8. The servo valve testing method of claim 4, wherein: when a pressure gain test is required:

the method comprises the following steps: starting a power switch of a pump station, electrifying an electromagnetic valve DT1 in the first direction type cover plate type cartridge valve control assembly, and providing high-pressure hydraulic oil for a test loop;

step two: electrifying an electromagnetic valve DT9 in the fourth direction type cover plate type cartridge valve control component, so that the T port of the tested valve is communicated with the pressure type cover plate type cartridge valve control component;

step three: and adjusting a proportional pressure valve in the pressure type cover plate type cartridge valve control assembly, and respectively acquiring data in a temperature sensor and a pressure sensor.

9. The servo valve testing method of claim 4, wherein: when an internal leakage test is required:

the method comprises the following steps: starting a power switch of a pump station, electrifying an electromagnetic valve DT1 in the first direction type cover plate type cartridge valve control assembly, and providing high-pressure hydraulic oil for a test loop;

step two: energizing a third electromagnetic reversing valve DT7 and a fourth electromagnetic reversing valve DT8, so that a tested valve T port has a small flow test condition;

step three: respectively collecting data of a temperature sensor, a pressure sensor and a flow sensor, and collecting internal leakage data of the tested valve.

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