Multifunctional Electro-Hydraulic Actuator Performance Testing Device

Abstract

The present invention provides a multifunctional electro-hydraulic actuator performance testing device in the field of hydraulic system technology, comprising a frame, a load simulation and energy recovery hydraulic system, a pull-rod displacement sensor, a tension and pressure sensing assembly, and an electro-hydraulic actuator. The frame comprises a crossbeam, and the crossbeam comprises crossbeam one and crossbeam two. The electro-hydraulic actuator comprises an electro-hydraulic actuator to be measured with an angular stroke, and an electro-hydraulic actuator to be measured with a linear stroke, wherein the electro-hydraulic actuator to be measured with an angular stroke is mounted on crossbeam one, and the electro-hydraulic actuator to be measured with a linear stroke is mounted on crossbeam two. An output rod one is provided on the hydraulic cylinder, a pull-rod displacement sensor is connected to the output rod one, and a tension and pressure sensing assembly is connected to the output rod one. The present invention sets a load simulation and energy recovery hydraulic system, and the load simulation and energy recovery hydraulic system enables the device to complete the position adjustment of the hydraulic cylinder action rod without the need for an additional power source, so as to meet the connection with the electro-hydraulic actuator to be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems, and in particular to a multifunctional electro-hydraulic actuator performance testing device. Background Art

[0002] Electro-hydraulic actuators, which convert electrical energy into linear or rotary mechanical energy through hydraulic pressure, offer advantages over traditional pneumatic and electric actuators, such as longer travel, greater thrust or torque, higher intelligence, greater sensitivity, more compact design, and fire resistance. They are widely used in oil pipelines, emergency shutdown systems for oil tank farms, water hammer prevention and emergency shutdown for hydraulic systems, wellheads, petrochemical plants, steel mill blast furnace venting towers, and quick-acting gas cutoff valves for power plants and mines. Based on their operating characteristics and structural form, they can be categorized as linear or quarter-turn electro-hydraulic actuators. Different applications require the selection or design of electro-hydraulic actuators with varying structures, output types, and power characteristics. Therefore, comprehensive and accurate testing of electro-hydraulic actuator performance parameters is crucial to meet the requirements of diverse scenarios. Current electro-hydraulic actuator testing equipment is either limited in function and test objects, or complex in structure, requiring extensive space for auxiliary systems. Furthermore, energy is not recycled during testing, resulting in wasted energy.

[0003] A search of the prior art revealed that the Chinese utility model patent publication number is CN203176062U, which discloses a device for detecting the safety function of an electro-hydraulic actuator in the field of industrial valve control, comprising a controller and an electrical control circuit connected thereto, wherein the electrical control circuit is respectively connected to a pressure sensor, a solenoid valve, a handle detection device, and a displacement sensor. The electrical control circuit is also connected to a hydraulic oil circuit through the above components, wherein the hydraulic oil circuit is respectively connected to an accumulator, a pressure gauge, a pressure sensor, a solenoid valve, a one-way valve, a hydraulic control valve 1, a hydraulic control valve 2, a manual valve, an oil cylinder, and an oil return device. This invention has the above-mentioned related problems, such as the single function of the test device, limited test objects, and the failure to recover energy during the test, resulting in energy waste and increased usage costs. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a multifunctional electro-hydraulic actuator performance testing device.

[0005] According to the present invention, a multifunctional electro-hydraulic actuator performance test device includes a frame, a load simulation and energy recovery hydraulic system, a pull-rod displacement sensor, a tension and pressure sensing component, and an electro-hydraulic actuator;

[0006] The frame includes a crossbeam, and the crossbeam includes a first crossbeam and a second crossbeam;

[0007] The electro-hydraulic actuator comprises a measured angular stroke electro-hydraulic actuator and a measured linear stroke electro-hydraulic actuator, the measured angular stroke electro-hydraulic actuator is mounted on the first crossbeam, and the measured linear stroke electro-hydraulic actuator is mounted on the second crossbeam;

[0008] The load simulation and energy recovery hydraulic system includes a hydraulic cylinder, a hydraulic circuit and a hydraulic pipeline, and the hydraulic circuit includes a pressure valve, an accumulator and a bidirectional hydraulic pump;

[0009] The hydraulic cylinder is provided with an output rod 1, the pull rod displacement sensor is connected to the output rod 1, and the tension and pressure sensing assembly is connected to the output rod 1;

[0010] The hydraulic oil in the hydraulic cylinder flows into the accumulator through the pressure valve. The accumulator is used to store the output oil energy of the hydraulic cylinder. The output oil energy is converted into mechanical energy output by the bidirectional hydraulic pump;

[0011] The tension and pressure sensing assembly includes a tension and pressure sensor and a guide rod, wherein the guide rod guides the tension and pressure sensor to maintain a correct testing direction.

[0012] In some embodiments, the rack further includes a base and columns, and the columns include column 1, column 2, column 3, and column 4;

[0013] One end of the first column and one end of the second column are connected to the base, and the other end of the first column and the other end of the second column are connected to the second beam;

[0014] One end of the column three and one end of the column four are connected to the beam two, and the other end of the column three and the other end of the column four are connected to the beam one.

[0015] In some embodiments, the hydraulic cylinder is disposed on the base, and the hydraulic cylinder is connected to the hydraulic circuit;

[0016] The hydraulic circuit further includes a flow regulating valve, a one-way valve, and a pressure gauge. The flow regulating valve, the one-way valve, the pressure gauge, the pressure valve, the accumulator, and the bidirectional hydraulic pump are interconnected through the hydraulic pipeline.

[0017] In some embodiments, the one-way valve and the pressure valve are symmetrically arranged.

[0018] In some embodiments, the pressure valve and the flow regulating valve are arranged in parallel, the pressure valve outlet is connected to the flow regulating valve outlet, the pressure valve and the flow regulating valve are both connected to the accumulator, and the other valve port of the pressure valve is interconnected with the oil port of the hydraulic cylinder.

[0019] In some embodiments, the one-way valve is arranged in parallel with the flow regulating valve, the one-way valve inlet is connected to the flow regulating valve inlet, and the one-way valve and the flow regulating valve are both connected to an oil tank, which is arranged in the hydraulic circuit.

[0020] In some embodiments, the bidirectional hydraulic pump is provided with oil ports at both ends, one end of the bidirectional hydraulic pump is connected to the oil tank, and the other end of the bidirectional hydraulic pump is connected to the flow regulating valve.

[0021] In some embodiments, a sheave and steel cable mechanism is further included, wherein the sheave and steel cable mechanism includes a sheave, a steel cable and a transmission shaft. The sheave is arranged on the first beam through the transmission shaft, and the steel cable is arranged in the sheave groove.

[0022] In some embodiments, the tension and pressure sensing assembly further includes an upper mounting seat, a lower mounting seat, and a linear bearing;

[0023] The guide rod is mounted on the upper mounting seat, the upper mounting seat is arranged at one end of the tension and pressure sensor, the lower mounting seat is arranged at the other end of the tension and pressure sensor, the linear bearing is mounted on the lower mounting seat, and the tension and pressure sensor is installed between the upper mounting seat and the lower mounting seat.

[0024] In some embodiments, the output shaft of the electro-hydraulic actuator to be measured is connected to the transmission shaft via a coupling. According to actual test needs, the coupling can be replaced with a torque sensor, and the tension and pressure sensing assembly is connected to the steel cable.

[0025] The measured linear electro-hydraulic actuator is provided with a second output rod, and the second output rod is connected to the tension and pressure sensing assembly.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention can complete the output performance parameter testing of linear electro-hydraulic actuators or angular electro-hydraulic actuators with various strokes by arranging a tension and pressure sensing component in conjunction with a sheave cable mechanism and a crossbeam;

[0028] 2. The present invention provides a load simulation and energy recovery hydraulic system, which enables the device to adjust the position of the hydraulic cylinder rod without the need for an additional power source to meet the connection requirements of the electro-hydraulic actuator under test;

[0029] 3. The present invention provides an accumulator with an energy recovery function, which can store energy during the test in the accumulator for recovery. When the accumulator pressure reaches the calibration value, the hydraulic energy can be converted into mechanical energy by the hydraulic pump for output to achieve energy reuse. When the pressure in the accumulator is insufficient to meet the position adjustment of the hydraulic cylinder output rod, the hydraulic motor can be used manually to replace the hydraulic pump function to increase the accumulator pressure or adjust the position of the hydraulic cylinder output rod.

[0030] 4. The present invention provides a tension and pressure sensor assembly, and a guide rod is installed on the tension and pressure sensor assembly to prevent the tension and pressure sensor from being damaged when the center of force deviates. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0032] Figure 1 It is a structural schematic diagram of the multifunctional electro-hydraulic actuator performance testing device of the present invention;

[0033] Figure 2 This is a hydraulic principle diagram of the load simulation and energy recovery hydraulic system of the multifunctional electro-hydraulic actuator performance testing device of the present invention;

[0034] Figure 3 Schematic diagram of the test installation of the angular stroke electro-hydraulic actuator of the multifunctional electro-hydraulic actuator performance test device of the present invention;

[0035] Figure 4 A schematic diagram of the test installation of a linear electro-hydraulic actuator of the multifunctional electro-hydraulic actuator performance test device of the present invention;

[0036] Figure 5 This is a schematic structural diagram of the tension and pressure sensor assembly of the multifunctional electro-hydraulic actuator performance testing device of the present invention.

[0037] Reference numerals

[0038] Base 1 Beam 15

[0039] Column 1 2 Tested linear electro-hydraulic actuator 16

[0040] Column 2 3 Output rod 2 161

[0041] Column 3 4 one-way valve 17

[0042] Column 4 5 Flow control valve 18

[0043] Load simulation and energy recovery hydraulic system 6 pressure valve 19

[0044] Hydraulic cylinder 7 Pressure gauge 20

[0045] Output rod 71 Accumulator 21

[0046] Tie rod displacement sensor 8 Bidirectional hydraulic pump 22

[0047] Pull and pressure sensing assembly 9 Oil tank 23

[0048] Beam 2 10 Guide rod 24

[0049] Steel cable 11 upper mounting seat 25

[0050] Grooved wheel 12 Lower mounting seat 26

[0051] Drive shaft 13 Linear bearing 27

[0052] Electro-hydraulic actuator 14 for measured angular travel, pull-pressure sensor 28 DETAILED DESCRIPTION

[0053] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0054] Example 1

[0055] like Figure 3 As shown, the present invention includes a frame, a load simulation and energy recovery hydraulic system 6, a pull-rod displacement sensor 8, a tension and pressure sensing assembly 9, and an electro-hydraulic actuator. The frame includes a crossbeam, which includes crossbeam 1 15 and crossbeam 2 10. The electro-hydraulic actuator includes a measured angular stroke electro-hydraulic actuator 14 and a measured linear stroke electro-hydraulic actuator 1616. The measured angular stroke electro-hydraulic actuator 14 is mounted on crossbeam 15, and the measured linear stroke electro-hydraulic actuator 16 is mounted on crossbeam 2 10. The load simulation and energy recovery hydraulic system 6 includes a hydraulic cylinder 7, a hydraulic circuit, and hydraulic piping. The hydraulic circuit includes a pressure valve 19, an accumulator 21, and a bidirectional hydraulic pump 22. An output rod 1 71 is provided on the hydraulic cylinder 7. The pull-rod displacement sensor 8 is connected to the output rod 1 71, and the tension and pressure sensing assembly 9 is connected to the output rod 1 71. The hydraulic oil in the hydraulic cylinder 7 flows through the pressure valve 19 into the accumulator 21. The accumulator 21 is used to store the output oil energy of the hydraulic cylinder 7. The output oil energy is converted into mechanical energy by the bidirectional hydraulic pump 22. The tension and pressure sensing assembly 9 includes a tension and pressure sensor 28 and a guide rod 24. The guide rod 24 guides the tension and pressure sensor 28 to maintain the correct testing direction.

[0056] The electro-hydraulic actuator 14, whose angular travel is being measured, is mounted on beam 15. Its output shaft is connected to the drive shaft 13 via a coupling. This coupling can be replaced with a torque sensor depending on actual testing needs. One end of a steel cable 11 is attached to sheave 12, which in turn is attached to the drive shaft 13 with the angular displacement sensor. The other end of the cable 11 is connected to the tension and pressure sensor assembly 9. When conducting performance testing, the opening pressure of the pressure valve (S, T) is set according to the test load requirements, and the flow regulating valve (G, H, I, J, K, L, M, N, P, O) is closed. During the test, the angular stroke electro-hydraulic actuator 14 drives the sheave 12 to rotate, and the steel cable 11 is driven by the sheave 12 to pull the output rod 71 of the hydraulic cylinder 7, which is subjected to an upward force. The hydraulic oil in the rod chamber of the hydraulic cylinder 7 increases in pressure under the action of the output rod 71 of the hydraulic cylinder 7. When the hydraulic oil pressure reaches the opening pressure value of the pressure valve (S, T), the pressure valve (S, T) opens, and the output rod 71 of the hydraulic cylinder 7 moves upward. The hydraulic oil in the oil tank 23 enters the rodless chamber of the hydraulic cylinder 7 through the one-way valve (E, F) and the B port of the hydraulic cylinder 7. The hydraulic oil in the rod chamber of the hydraulic cylinder 7 enters the accumulator 21 from the A port through the pressure valve (S, T) to store the output oil energy of the hydraulic cylinder 7. The output torque and angular displacement of the measured angular stroke electro-hydraulic actuator 14 can be obtained by the angular displacement sensor set on the transmission shaft 13. The torque of the measured angular stroke electro-hydraulic actuator 14 can also be obtained by multiplying the pulley pressure sensor component 9 by the radius of the sheave 12, and the angular displacement can be obtained by the quotient of the pull rod displacement sensor 8 and the radius of the sheave 12.

[0057] Example 2

[0058] like Figure 4As shown, the present invention includes a frame, a load simulation and energy recovery hydraulic system 6, a pull-rod displacement sensor 8, a tension and pressure sensing assembly 9, and an electro-hydraulic actuator. The frame includes a crossbeam, which includes crossbeam 1 15 and crossbeam 2 10. The electro-hydraulic actuator includes a measured angular stroke electro-hydraulic actuator 14 and a measured linear stroke electro-hydraulic actuator 1616. The measured angular stroke electro-hydraulic actuator 14 is mounted on crossbeam 15, and the measured linear stroke electro-hydraulic actuator 16 is mounted on crossbeam 2 10. The load simulation and energy recovery hydraulic system 6 includes a hydraulic cylinder 7, a hydraulic circuit, and hydraulic piping. The hydraulic circuit includes a pressure valve 19, an accumulator 21, and a bidirectional hydraulic pump 22. An output rod 1 71 is provided on the hydraulic cylinder 7. The pull-rod displacement sensor 8 is connected to the output rod 1 71, and the tension and pressure sensing assembly 9 is connected to the output rod 1 71. The hydraulic oil in the hydraulic cylinder 7 flows through the pressure valve 19 into the accumulator 21. The accumulator 21 is used to store the output oil energy of the hydraulic cylinder 7. The output oil energy is converted into mechanical energy by the bidirectional hydraulic pump 22. The tension and pressure sensing assembly 9 includes a tension and pressure sensor 28 and a guide rod 24. The guide rod 24 guides the tension and pressure sensor 28 to maintain the correct testing direction.

[0059] The linear electro-hydraulic actuator 16 to be measured is installed on the second crossbeam 10 , and the second output rod 161 of the linear electro-hydraulic actuator 16 to be measured is connected to the tension and pressure sensing device 9 . During testing, the opening pressure of the pressure valves (U, V) is set according to the test load requirements, and the flow control valves (G, H, I, J, K, L, M, N, P, O) are closed. During the test, the force of the output rod 2 161 of the tested linear electro-hydraulic actuator 16 acts on the output rod 1 71 of the hydraulic cylinder 7 through the pull-pressure sensing assembly 9. The hydraulic oil pressure in the rodless chamber of the hydraulic cylinder 7 increases. When the hydraulic oil pressure reaches the opening pressure value of the pressure valves (U, V), the pressure valves (U, V) open, and the output rod 1 71 of the hydraulic cylinder 7 moves downward. The hydraulic oil in the oil tank 23 enters the rod chamber of the hydraulic cylinder 7 through the one-way valves (C, D) and the A port of the hydraulic cylinder 7. The hydraulic oil in the rodless chamber of the hydraulic cylinder 7 enters the accumulator 21 from the B port through the pressure valves (U, V), storing the output oil energy of the hydraulic cylinder 7. The output force and displacement of the tested linear electro-hydraulic actuator 16 can be obtained by the pull-rod displacement sensor 8 and the pull-pressure sensing assembly 9.

[0060] How it works

[0061] like Figures 1 to 5As shown, the present invention includes a base 1, a column, a load simulation and energy recovery hydraulic system 6, a hydraulic cylinder 7, a pull rod displacement sensor 8, a tension and pressure sensing assembly 9, a crossbeam, a steel cable 11, and a sheave 12. The load simulation and energy recovery hydraulic system 6 comprises the hydraulic cylinder 7, a one-way valve 17, a flow regulating valve 18, a pressure valve 19, a pressure gauge 20, an accumulator 21, a bidirectional hydraulic pump 22, and a fuel tank 23. The tension and pressure sensing assembly 9 comprises a guide rod 24, an upper mounting seat 25, a lower mounting seat 26, a linear bearing 27, and a tension and pressure sensor 28.

[0062] The frame of the present invention consists of a base 1, crossbeams, and columns. The columns are mounted on the base 1, and the crossbeams are mounted on the columns from bottom to top. Pulley 12 is mounted on crossbeam 15 via drive shaft 13. Hydraulic cylinder 7 is fixedly mounted on base 1, and pull rod displacement sensor 8 is mounted on base 1. Pull rod displacement sensor 8 is connected to output rod 1 71 of hydraulic cylinder 7. Pull pressure sensor assembly 9 is mounted on output rod 1 71 of hydraulic cylinder.

[0063] The load simulation and energy recovery hydraulic system 6 is connected to ports A and B of the hydraulic cylinder 7, and the oil circuit of the load simulation and energy recovery hydraulic system is arranged symmetrically. Port C of the check valve is connected to the flow control valve (ports G and K) and the pressure valve S. Port F of the check valve is connected to the flow control valve (ports J and N) and the pressure valve V. Port D of the check valve is connected to port E of the check valve and the flow control valve (ports H and I), and then to the oil tank. Ports L and M of the flow control valve are connected to the pressure valve (ports T and U), port W of the accumulator, pressure gauge 20, and port O of the flow control valve. Port P of the flow control valve is connected to port Q of the bidirectional hydraulic pump, and port R of the bidirectional hydraulic pump is connected to the oil tank 29.

[0064] When the pressure value of the pressure gauge 20 exceeds a certain value, the flow regulating valve 18 can be opened, and the hydraulic oil drives the bidirectional hydraulic pump 22 through the flow regulating valve 18 to output the hydraulic energy in the form of mechanical energy. When the pressure value of the pressure gauge 20 is less than a certain value, the flow regulating valve 18 can be opened, and the pressure of the accumulator 21 can be manually increased through the bidirectional hydraulic pump 22.

[0065] During the test, the position of the output rod 71 of the hydraulic cylinder 7 needs to be adjusted so as to pull the pressure sensing assembly 9 and connect it to the steel cable 11 or the output rod 2 161 of the electro-hydraulic actuator. This can be done by the following operations: when the output rod 1 71 of the hydraulic cylinder 7 needs to move downward, open the flow regulating valve (port I, port J), close the flow regulating valve (port G, port H, port M, port N, port P, port O), adjust the flow regulating valve (port K, port L), and the hydraulic oil in the accumulator 21 enters the rod chamber of the hydraulic cylinder 7 through the flow regulating valve (port K, port L) under the action of pressure. The output rod 1 71 of the hydraulic cylinder 7 moves downward under the action of the hydraulic oil, and the hydraulic oil in the rodless chamber of the hydraulic cylinder 7 enters the oil tank through the flow regulating valve (port I, port J). When the target position is reached, close the flow regulating valve (port K, port L). When the output rod 71 of the hydraulic cylinder 7 needs to move upward, open the flow regulating valve (G port, H port), close the flow regulating valve (I port, J port, K port, L port, P port, O port), adjust the flow regulating valve (M port, N port), and the hydraulic oil in the accumulator 21 enters the rodless cavity of the hydraulic cylinder 7 through the flow regulating valve (M port, N port) under the action of pressure. The output rod 71 of the hydraulic cylinder 7 moves upward under the action of the hydraulic oil, and the hydraulic oil in the rod cavity of the hydraulic cylinder 7 enters the oil tank 23 through the flow regulating valve (G port, H port). When the target position is reached, close the flow regulating valve (M port, N port).

[0066] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0067] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A multifunctional electro-hydraulic actuator performance testing device, characterized in that: It includes a frame, a load simulation and energy recovery hydraulic system (6), a pull rod displacement sensor (8), a tension and pressure sensing component (9) and an electro-hydraulic actuator; The frame includes crossbeams, and the crossbeams include crossbeam 1 (15) and crossbeam 2 (10); The electro-hydraulic actuator comprises a measured angular stroke electro-hydraulic actuator (14) and a measured linear stroke electro-hydraulic actuator (16), wherein the measured angular stroke electro-hydraulic actuator (14) is mounted on the first crossbeam (15), and the measured linear stroke electro-hydraulic actuator (16) is mounted on the second crossbeam (10); The load simulation and energy recovery hydraulic system (6) includes a hydraulic cylinder (7), a hydraulic circuit, and a hydraulic pipeline. The hydraulic circuit includes a pressure valve (19), an accumulator (21), and a bidirectional hydraulic pump (22). An output rod 1 (71) is provided on the hydraulic cylinder (7), the pull rod displacement sensor (8) is connected to the output rod 1 (71), and the tension and pressure sensing assembly (9) is connected to the output rod 1 (71); The hydraulic oil in the hydraulic cylinder (7) flows into the accumulator (21) through the pressure valve (19), and the accumulator (21) is used to store the output oil energy of the hydraulic cylinder (7). The output oil energy is converted into mechanical energy output by the bidirectional hydraulic pump (22); The tension and pressure sensing assembly (9) comprises a tension and pressure sensor (28) and a guide rod (24), wherein the guide rod (24) guides the tension and pressure sensor (28) to remain in a correct testing direction; It also includes a sheave steel cable mechanism, the sheave steel cable mechanism including a sheave (12), a steel cable (11) and a transmission shaft (13), the sheave (12) being arranged on the first crossbeam (15) via the transmission shaft (13), and the steel cable (11) being arranged in a groove of the sheave (12); The measured angular stroke electro-hydraulic actuator (14) is connected to the transmission shaft (13), and the tension and pressure sensing component (9) is connected to the steel cable (11); The measured linear electro-hydraulic actuator (16) is provided with a second output rod (161), and the second output rod (161) is connected to the tension and pressure sensing assembly (9).

2. The multifunctional electro-hydraulic actuator performance testing device according to claim 1, characterized in that: The frame further comprises a base (1) and columns, wherein the columns comprise column one (2), column two (3), column three (4) and column four (5); One end of the first column (2) and one end of the second column (3) are connected to the base (1), and the other end of the first column (2) and the other end of the second column (3) are connected to the second beam (10); One end of the column three (4) and one end of the column four (5) are connected to the crossbeam two (10), and the other end of the column three (4) and the other end of the column four (5) are connected to the crossbeam one (15).

3. The multifunctional electro-hydraulic actuator performance testing device according to claim 2, characterized in that: The hydraulic cylinder (7) is arranged on the base (1), and the hydraulic cylinder (7) is connected to the hydraulic circuit; The hydraulic circuit further comprises a flow regulating valve (18), a one-way valve (17), and a pressure gauge (20); the flow regulating valve (18), the one-way valve (17), the pressure gauge (20), the pressure valve (19), the accumulator (21), and the bidirectional hydraulic pump (22) are interconnected via the hydraulic pipeline.

4. The multifunctional electro-hydraulic actuator performance testing device according to claim 3, characterized in that: The one-way valve (17) and the pressure valve (19) are both symmetrically arranged.

5. The multifunctional electro-hydraulic actuator performance testing device according to claim 3, characterized in that: The pressure valve (19) is arranged in parallel with the flow regulating valve (18), the outlet of the pressure valve (19) is connected to the outlet of the flow regulating valve (18), and the pressure valve (19) and the flow regulating valve (18) are both connected to the accumulator (21).

6. The multifunctional electro-hydraulic actuator performance testing device according to claim 3, characterized in that: The one-way valve (17) and the flow regulating valve (18) are arranged in parallel, the inlet of the one-way valve (17) is connected to the inlet of the flow regulating valve (18), and the one-way valve (17) and the flow regulating valve (18) are both connected to an oil tank (23), and the oil tank (23) is arranged in the hydraulic circuit.

7. The multifunctional electro-hydraulic actuator performance testing device according to claim 6, characterized in that: The bidirectional hydraulic pump (22) is provided with oil ports at both ends. One end of the bidirectional hydraulic pump (22) is connected to the oil tank (23), and the other end of the bidirectional hydraulic pump (22) is connected to the flow regulating valve (18).

8. The multifunctional electro-hydraulic actuator performance testing device according to claim 1, characterized in that: The tension and pressure sensing assembly (9) further includes an upper mounting seat (25), a lower mounting seat (26) and a linear bearing (27); The guide rod (24) is mounted on the upper mounting seat (25), the upper mounting seat (25) is arranged at one end of the tension and pressure sensor (28), the lower mounting seat (26) is arranged at the other end of the tension and pressure sensor (28), the linear bearing (27) is mounted on the lower mounting seat (26), and the tension and pressure sensor (28) is mounted between the upper mounting seat (25) and the lower mounting seat (26).

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