Response time testing device and method for a hydraulic actuator

Abstract

The application discloses a response time testing device and method of a hydraulic actuating cylinder, adopts the response time testing device, realizes the extension state working parameter configuration of the response time testing device through step S1, realizes the retraction state working parameter configuration of the response time testing device through step S2, and measures the response time of the measured hydraulic actuating cylinder through step S3 under the foregoing configuration; therefore, the application can realize the instantaneous switching of the hydraulic pressure and the flowing direction of the hydraulic fluid of the first pressure port and the second pressure port of the measured hydraulic actuating cylinder, realizes the response time measurement of the measured hydraulic actuating cylinder, and ensures that the hydraulic pressure fluctuation is small, the response time testing result is accurate, and the operation is safe and stable during the response time testing process by controlling the on-off power state switching of the first pressure control servo valve and the second pressure control servo valve through the power supply switching circuit under the condition that only a single-way hydraulic pressure source is provided on the testing table.

Description

Technical Field

[0001] The present invention relates to a testing device for civil aviation passenger aircraft equipment, in particular to a device and method for testing the response time of a hydraulic actuator. Background Art

[0002] like Figure 1 As shown in the figure, the hydraulic actuator on a civil aircraft has a flow restriction orifice 1a on its piston 1, which is used to buffer fluid pressure and establish a pressure differential between the left and right ends of the piston 1. The hydraulic pressure from the first and second pressure ports P1 and P2 of the hydraulic actuator actuates the piston 1. The hydraulic actuator response time test simulates the hydraulic actuator's response time under aircraft load conditions and is a key parameter in hydraulic actuator testing. It involves the instantaneous switching of fluid pressure and direction, and accurately calculates the actuation time of the piston 1.

[0003] For example, the response time test parameters of a certain configuration of a hydraulic actuator are as follows: the hydraulic actuator switches between the following two states: State 1 and State 2. The response actuation time of extending and retracting the piston 1 is calculated, which does not exceed 100 milliseconds.

[0004] State 1: The pressure of the first pressure port P1 is 500 PSIG, the pressure of the second pressure port P2 is 380 PSIG, and the fluid flows from the first pressure port P1 to the second pressure port P2.

[0005] State 2: The pressure of the first pressure port P1 is 150 PSIG, the pressure of the second pressure port P2 is 320 PSIG, and the fluid flows from the second pressure port P2 to the first pressure port P1.

[0006] The current approach to testing the response time of hydraulic actuators involves dual-circuit pressure control for both the first and second pressure ports P1 and P2. This requires two pressure sources to control the pressures at these ports, respectively. This approach has the following drawbacks: it significantly increases the manufacturing cost of the testing equipment, and the switching between the two pressure sources can interfere with each other, causing brief pressure fluctuations and distorting test parameters. Summary of the Invention

[0007] One of the technical problems to be solved by the present invention is to provide a response time testing device for a hydraulic actuator.

[0008] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0009] A response time testing device of a hydraulic actuating cylinder, characterized in that it comprises a testing table, a first pressure control servo valve, a second pressure control servo valve and a power supply switching circuit; wherein the testing table has an oil supply port for providing a single-path hydraulic pressure source, and a first oil return port and a second oil return port for collecting hydraulic fluid return; the first pressure control servo valve and the second pressure control servo valve have the same characteristics, that is, when powered on, the first interface and the second interface are connected and disconnected with the third interface; when powered off, the second interface and the third interface are connected and disconnected with the first interface.

[0010] The oil supply port of the testing table is divided into two paths after being connected with a system pressure regulating valve, the first path is connected with the first interface of the first pressure control servo valve, and the second path is connected with the first interface of the second pressure control servo valve through a high-pressure regulating valve.

[0011] The second interface of the first pressure control servo valve is connected with the first pressure port of the measured hydraulic actuating cylinder through a first measured member interface pressure gauge; the second interface of the second pressure control servo valve is connected with the second pressure port of the measured hydraulic actuating cylinder through a second measured member interface pressure gauge.

[0012] The third interface of the first pressure control servo valve is connected with the first oil return port of the testing table through a first low-pressure regulating valve; the third interface of the second pressure control servo valve is connected with the second oil return port of the testing table through a second low-pressure regulating valve.

[0013] The power supply switching circuit can control the on-off state of the first pressure control servo valve and the second pressure control servo valve respectively.

[0014] Preferably, the power supply switching circuit is composed of a DC power supply and a switching switch; the positive electrode of the DC power supply is electrically connected with the common terminal of the switching switch, the first terminal of the switching switch is electrically connected with the positive power input electrode of the first pressure control servo valve, the second terminal of the switching switch is electrically connected with the positive power input electrode of the second pressure control servo valve; the negative electrode of the DC power supply is electrically connected with the negative power input electrode of the first pressure control servo valve and the negative power input electrode of the second pressure control servo valve. Thus, by turning the switching switch to Figure 2 , the first pressure control servo valve can be powered on and the second pressure control servo valve can be powered off; by turning the switching switch to Figure 3 , the first pressure control servo valve can be powered off and the second pressure control servo valve can be powered on.

[0015] Preferably, the switching switch adopts a toggle switch structure.

[0016] Preferably, the oil supply port of the test bench is connected to a system pressure regulating valve and a supply pressure gauge in sequence, and then divided into two paths, so that the hydraulic pressure provided by the oil supply port of the test bench to the response time testing device can be tested through the supply pressure gauge.

[0017] The second technical problem to be solved by the present application is to provide a response time testing method of a hydraulic actuator.

[0018] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0019] A response time testing method of a hydraulic actuator, characterized in that the method is implemented based on a response time testing device of the hydraulic actuator.

[0020] The method comprises the following steps:

[0021] Step S1, referring to Figure 2 The response time testing device is configured with working parameters suitable for the extension state of the hydraulic actuator to be tested, specifically:

[0022] Step S1-1, the response time testing device is controlled to be in an extension power supply state through a power supply switching circuit, that is, the first pressure control servo valve is in an energized state, and the second pressure control servo valve is in a de-energized state.

[0023] So that the hydraulic fluid output by the oil supply port of the test bench flows along the following route:

[0024] Oil supply port of the test bench→system pressure regulating valve→supply pressure gauge→first interface of the first pressure control servo valve→second interface of the first pressure control servo valve→first measured part interface pressure gauge→first pressure port of the hydraulic actuator to be tested→second pressure port of the hydraulic actuator to be tested→second measured part interface pressure gauge→second interface of the second pressure control servo valve→third interface of the second pressure control servo valve→second low pressure regulating valve→second oil return port of the test bench.

[0025] At this time, the piston of the hydraulic actuator to be tested is in an extended state.

[0026] Step S1-2, adjust the opening degree of the system pressure regulating valve, so that the reading of the first measured part interface pressure gauge (i.e. the pressure of the first pressure port of the hydraulic actuator to be tested) reaches the specified first pressure port high pressure value of the hydraulic actuator to be tested.

[0027] Step S1-3, adjust the opening degree of the second low pressure regulating valve, so that the reading of the second measured part interface pressure gauge (i.e. the pressure of the second pressure port of the hydraulic actuator to be tested) reaches the specified second pressure port low pressure value of the hydraulic actuator to be tested.

[0028] Thus, by step S1-1, the piston of the measured hydraulic actuator is in the extended state, and by steps S1-2 and S1-3, the measured hydraulic actuator is in state one, i.e. the piston is in the fully extended state.

[0029] Step S2, see Figure 3 The response time testing device is configured with parameters suitable for the retracted state of the measured hydraulic actuator, specifically:

[0030] Step S2-1, by the power supply switching circuit, the response time testing device is in the retracted power supply state, i.e. the first pressure control servo valve is in the power-off state, and the second pressure control servo valve is in the power-on state.

[0031] The hydraulic fluid output from the oil supply port of the test bench flows along the following route:

[0032] Oil supply port of the test bench → system pressure regulating valve → supply pressure gauge → high pressure regulating valve → first interface of the second pressure control servo valve → second interface of the second pressure control servo valve → second measured part interface pressure gauge → second pressure port of the measured hydraulic actuator → first pressure port of the measured hydraulic actuator → first measured part interface pressure gauge → second interface of the first pressure control servo valve → third interface of the first pressure control servo valve → first low pressure regulating valve → first oil return port of the test bench.

[0033] At this time, the piston of the measured hydraulic actuator is in the retracted state.

[0034] Step S2-2, adjust the opening of the high pressure regulating valve, so that the reading of the second measured part interface pressure gauge (i.e. the pressure of the second pressure port of the measured hydraulic actuator) reaches the specified second pressure port high pressure value of the measured hydraulic actuator;

[0035] Step S2-3, adjust the opening of the first low pressure regulating valve, so that the reading of the first measured part interface pressure gauge (i.e. the pressure of the first pressure port of the measured hydraulic actuator) reaches the specified first pressure port low pressure value of the measured hydraulic actuator;

[0036] Thus, by step S2-1, the piston of the measured hydraulic actuator is in the retracted state, and by steps S2-2 and S2-3, the measured hydraulic actuator is in state two, i.e. the piston is in the fully retracted state.

[0037] Wherein, for the determined type of the measured hydraulic actuator, the first pressure port high pressure value and the second pressure port low pressure value, the second pressure port high pressure value and the first pressure port low pressure value are the fixed values provided by the manufacturer when the piston is in the fully extended state and the fully retracted state, for example: the background art describes a certain configuration of hydraulic actuator, the four values are 500PSIG and 380PSIG, 320PSIG and 150PSIG in turn.

[0038] Step S3, after the extension state working parameter and the retraction state working parameter of the response time testing device are configured, the power supply switching circuit is used to control the response time testing device to switch between the extension power supply state and the retraction power supply state, so that the piston of the measured hydraulic actuator moves between the fully extended state and the fully retracted state.

[0039] And, by reading the electrical signal output by the LVDT displacement sensor for sensing the extension and retraction movement of the piston on the measured hydraulic actuator, the fully extended time and the fully retracted time of the piston of the measured hydraulic actuator are determined to calculate the response time of the measured hydraulic actuator.

[0040] Step S4, after the response time test of the measured hydraulic actuator is completed, the system pressure regulating valve is closed to reduce the hydraulic pressure of the response time testing device to zero, and the DC power supply is turned off.

[0041] Therefore, the present application can realize the instantaneous switching of the hydraulic pressure and the flow direction of the first pressure port and the second pressure port of the measured hydraulic actuator by controlling the on-off state switching of the first pressure control servo valve and the second pressure control servo valve through the power supply switching circuit under the condition that the test bench only provides a single hydraulic pressure source, to realize the response time determination of the measured hydraulic actuator, and ensure that the hydraulic pressure fluctuation is small, the response time test result is accurate, the operation is safe and stable, and the problems of high manufacturing cost of test equipment and test result distortion caused by pressure fluctuation due to mutual interference of two hydraulic pressure sources when switching pressure state in the prior art are avoided.

[0042] Compared with the prior art, the present application has the following beneficial effects:

[0043] First, the present invention adopts a response time testing device provided with a test bench, a first pressure control servo valve, a second pressure control servo valve, a system pressure regulating valve, a supply pressure gauge, a high pressure regulating valve, a first test piece interface pressure gauge, a second test piece interface pressure gauge, a first low pressure regulating valve, a second low pressure regulating valve and a power supply switching circuit; through step S1-1, the piston of the tested hydraulic actuator cylinder is in an extended state, and through steps S1-2 and S1-3, the piston of the tested hydraulic actuator cylinder is in a fully extended state, so as to realize the extended state working parameter configuration of the response time testing device; through step S2-1, the piston of the tested hydraulic actuator cylinder is in a retracted state, and through steps S2-2 and S2-3, the piston of the tested hydraulic actuator cylinder is in a fully retracted state, so as to realize the retracted state working parameter configuration of the response time testing device. Return state working parameter configuration; and under the above configuration, the response time of the hydraulic actuator under test is measured through step S3; therefore, the present invention can control the on-off state switching of the first pressure control servo valve and the second pressure control servo valve through the power supply switching circuit when the test bench only provides a single hydraulic pressure source, so as to realize the instantaneous switching of the hydraulic pressure and the flow direction of the hydraulic fluid of the first pressure port and the second pressure port of the hydraulic actuator under test, so as to realize the response time measurement of the hydraulic actuator under test, and in the response time test process, ensure that the hydraulic pressure fluctuation is small, the response time test result is highly accurate, and the operation is safe and stable, avoiding the problems of high manufacturing cost of the test equipment caused by the use of two hydraulic pressure sources in the prior art, and pressure fluctuation caused by mutual interference between the two hydraulic pressure sources when switching the pressure states, resulting in distortion of the test results.

[0044] Second, the present invention adopts a power supply switching circuit composed of a DC power supply and a switching switch, which can conveniently switch the on and off states of the first pressure control servo valve and the second pressure control servo valve by toggling the switching switch, and can effectively improve the execution efficiency of the response time test of the hydraulic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0046] Figure 1 This is a simplified structural diagram of the hydraulic actuator;

[0047] Figure 2 A schematic diagram of the response time testing device of the present invention when the hydraulic actuator under test is in state one;

[0048] Figure 3 It is a schematic diagram of the response time testing device of the present invention when the hydraulic actuator under test is in state two. DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative work without departing from the inventive concept of the present invention shall fall within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figures 1 to 3 As shown, the first embodiment of the present invention discloses a response time test device for a hydraulic actuator, comprising: a test bench 2, a first pressure control servo valve 3, a second pressure control servo valve 4, and a power supply switching circuit; wherein the test bench 2 has an oil supply port 2a for providing a single hydraulic pressure source, and a first oil return port 2b and a second oil return port 2c, both for collecting hydraulic fluid reflux; the first pressure control servo valve 3 and the second pressure control servo valve 4 have the following identical characteristics: when power is on, the first interface and the second interface are connected and disconnected from the third interface; when power is off, the second interface is connected to the third interface and disconnected from the first interface;

[0052] The oil supply port 2a of the test bench 2 is connected to the system pressure regulating valve 5 and then divided into two paths. The first path is connected to the first interface 3a of the first pressure control servo valve 3, and the second path is connected to the first interface 4a of the second pressure control servo valve 4 through the high-pressure regulating valve 7;

[0053] The second port 3b of the first pressure control servo valve 3 is connected to the first pressure port P1 of the hydraulic actuator 9 under test through the first test component interface pressure gauge 8; the second port 4b of the second pressure control servo valve 4 is connected to the second pressure port P2 of the hydraulic actuator 9 under test through the second test component interface pressure gauge 10;

[0054] The third port 3c of the first pressure control servo valve 3 is connected to the first oil return port 2b of the test bench 2 through the first low-pressure regulating valve 11; the third port 4c of the second pressure control servo valve 4 is connected to the second oil return port 2c of the test bench 2 through the second low-pressure regulating valve 12;

[0055] The power supply switching circuit can control the on and off states of the first pressure control servo valve 3 and the second pressure control servo valve 4 respectively.

[0056] The above is a basic implementation of the first embodiment of the present invention. Further optimization, improvement and limitation can be made based on this basic implementation:

[0057] Preferably: the power supply switching circuit is composed of a DC power supply 13 and a switch 14; the positive pole of the DC power supply 13 is electrically connected to the common terminal of the switch 14, the first terminal of the switch 14 is electrically connected to the positive pole of the power input of the first pressure control servo valve 3, and the second terminal of the switch 14 is electrically connected to the positive pole of the power input of the second pressure control servo valve 4; the negative pole of the DC power supply 13 is electrically connected to the negative pole of the power input of the first pressure control servo valve 3 and the negative pole of the power input of the second pressure control servo valve 4. Thus, by toggling the switch 14 to Figure 2 In the state shown, the first pressure control servo valve 3 can be powered on and the second pressure control servo valve 4 can be powered off; and by toggling the switch 14 to Figure 3 In the state shown, the first pressure control servo valve 3 can be de-energized and the second pressure control servo valve 4 can be energized.

[0058] Preferably, the switch 14 adopts a toggle switch structure.

[0059] Preferably, the oil supply port 2a of the test bench 2 is connected to the system pressure regulating valve 5 and the pressure supply gauge 6 in sequence and then divided into two paths, so as to measure the hydraulic pressure provided by the oil supply port 2a of the test bench 2 to the response time test device through the pressure supply gauge 6.

[0060] Example 2

[0061] like Figures 1 to 3 As shown, the second embodiment of the present invention discloses a method for testing the response time of a hydraulic actuator, which is implemented based on the response time testing device of the hydraulic actuator described in the first embodiment;

[0062] include:

[0063] Step S1, see Figure 2 , the response time test device is configured with working parameters adapted to the extension state of the hydraulic actuator 9 to be tested, specifically:

[0064] Step S1-1, controlling the response time test device to be in an extended power supply state through the power supply switching circuit, that is, the first pressure control servo valve 3 is in an energized state, and the second pressure control servo valve 4 is in an off-power state;

[0065] The hydraulic fluid output from the oil supply port 2a of the test bench 2 flows along the following route:

[0066] Oil supply port 2a of test bench 2 → system pressure regulating valve 5 → supply pressure gauge 6 → first interface 3a of first pressure control servo valve 3 → second interface 3b of first pressure control servo valve 3 → first test piece interface pressure gauge 8 → first pressure port P1 of tested hydraulic actuator 9 → second pressure port P2 of tested hydraulic actuator 9 → second test piece interface pressure gauge 10 → second interface 4b of second pressure control servo valve 4 → third interface 4c of second pressure control servo valve 4 → second low-pressure regulating valve 12 → second oil return port 2c of test bench 2.

[0067] At this time, the piston 1 of the tested hydraulic jack 9 is in an extended state.

[0068] Step S1-2: Adjust the opening of the system pressure regulating valve 5 so that the reading of the first test component interface pressure gauge 8 (i.e., the pressure of the first pressure port P1 of the tested hydraulic actuator 9) reaches the high pressure value of the first pressure port specified by the tested hydraulic actuator 9;

[0069] Step S1-3, adjusting the opening of the second low-pressure regulating valve 12 so that the reading of the second test piece interface pressure gauge 10 (i.e., the pressure of the second pressure port P2 of the tested hydraulic actuator 9) reaches the second pressure port low pressure value specified by the tested hydraulic actuator 9;

[0070] Thus, through step S1-1, the piston 1 of the hydraulic jack 9 under test is in an extended state, and through steps S1-2 and S1-3, the hydraulic jack 9 under test is in state one, that is, its piston 1 is in a fully extended state.

[0071] Step S2, see Figure 3 , the response time test device is configured with working parameters adapted to the retracted state of the hydraulic actuator 9 being tested, specifically:

[0072] Step S2-1: Control the response time test device to be in a retracted power state through the power switching circuit, that is, the first pressure control servo valve 3 is in a power-off state, and the second pressure control servo valve 4 is in a power-on state;

[0073] The hydraulic fluid output from the oil supply port 2a of the test bench 2 flows along the following route:

[0074] Test bench 2 oil supply port 2a → system pressure regulating valve 5 → supply pressure gauge 6 → high pressure regulating valve 7 → second pressure control servo valve 4 first interface 4a → second pressure control servo valve 4 second interface 4b → second test piece interface pressure gauge 10 → second pressure port P2 of test hydraulic cylinder 9 → first pressure port P1 of test hydraulic cylinder 9 → first test piece interface pressure gauge 8 → second interface 3b of first pressure control servo valve 3 → third interface 3c of first pressure control servo valve 3 → first low pressure regulating valve 11 → first return port 2b of test bench 2.

[0075] At this time, the piston 1 of the test hydraulic cylinder 9 is in the retracted state.

[0076] Step S2-2, adjust the opening of the high pressure regulating valve 7, so that the reading of the second test piece interface pressure gauge 10 (i.e. the pressure of the second pressure port P2 of the test hydraulic cylinder 9) reaches the second pressure port high pressure value specified for the test hydraulic cylinder 9;

[0077] Step S2-3, adjust the opening of the first low pressure regulating valve 11, so that the reading of the first test piece interface pressure gauge 8 (i.e. the pressure of the first pressure port P1 of the test hydraulic cylinder 9) reaches the first pressure port low pressure value specified for the test hydraulic cylinder 9;

[0078] Thus, by step S2-1, the piston 1 of the test hydraulic cylinder 9 is in the retracted state, and by steps S2-2 and S2-3, the test hydraulic cylinder 9 is in state two, i.e. its piston 1 is in the fully retracted state.

[0079] Among them, for a certain type of test hydraulic cylinder 9, the first pressure port high pressure value and the second pressure port low pressure value, the second pressure port high pressure value and the first pressure port low pressure value are fixed values provided by the manufacturer when the piston 1 is in the fully extended state and the fully retracted state, for example: the hydraulic cylinder of the configuration described in the background art, the four values are 500 PSIG and 380 PSIG, 320 PSIG and 150 PSIG in turn.

[0080] Step S3, after the extension state working parameter and the retraction state working parameter of the response time test device are configured, the power supply switching circuit is used to control the response time test device to switch between the extension power supply state and the retraction power supply state, so that the piston 1 of the test hydraulic cylinder 9 moves between the fully extended state and the fully retracted state;

[0081] And by reading the electrical signal output by the LVDT displacement sensor on the test hydraulic cylinder 9 for sensing the extension and retraction of the piston 1, the fully extended time and the fully retracted time of the piston 1 of the test hydraulic cylinder 9 are determined to calculate the response time of the test hydraulic cylinder 9.

[0082] Step S4, after the response time test of the measured hydraulic actuator 9 is completed, the system pressure regulating valve 5 is closed to reduce the hydraulic pressure of the response time test device to zero, and the DC power supply 13 is turned off.

[0083] Therefore, the present application can provide a single hydraulic pressure source for the test bench 2, and through the power supply switching circuit to control the on-off state switching of the first pressure control servo valve 3 and the second pressure control servo valve 4, to realize the instantaneous switching of the hydraulic pressure and the flow direction of the first pressure port P1 and the second pressure port P2 of the measured hydraulic actuator 9, to realize the response time test of the measured hydraulic actuator 9, and during the response time test, to ensure small hydraulic pressure fluctuation, high accuracy of the response time test result, safe and stable operation, to avoid the problems of high manufacturing cost of the test equipment caused by two hydraulic pressure sources in the prior art, and the mutual interference of the two hydraulic pressure sources when switching the pressure state, which causes the pressure fluctuation and leads to the distortion of the test result.

[0084] The present application is not limited to the above specific embodiments, according to the above content, according to the ordinary technical knowledge and conventional means in the art, without departing from the above basic technical idea of the present application, the present application can also be made in other various forms of equivalent modification, replacement or change, all fall within the protection scope of the present application.

Claims

1. A response time testing device for a hydraulic actuator, characterized in that: include: A test bench (2), a first pressure control servo valve (3), a second pressure control servo valve (4) and a power supply switching circuit; wherein the test bench (2) has an oil supply port (2a) for providing a single-channel hydraulic pressure source and a first oil return port (2b) and a second oil return port (2c) both for collecting hydraulic fluid reflux; the first pressure control servo valve (3) and the second pressure control servo valve (4) have the following identical characteristics: when power is on, the first interface and the second interface are connected and disconnected from the third interface; when power is off, the second interface and the third interface are connected and disconnected from the first interface; The oil supply port (2a) of the test bench (2) is connected to the system pressure regulating valve (5) and then divided into two paths, the first path being connected to the first interface (3a) of the first pressure control servo valve (3), and the second path being connected to the first interface (4a) of the second pressure control servo valve (4) through the high-pressure regulating valve (7); The second interface (3b) of the first pressure control servo valve (3) is connected to the first pressure port (P1) of the hydraulic actuator (9) to be tested via the first test piece interface pressure gauge (8); the second interface (4b) of the second pressure control servo valve (4) is connected to the second pressure port (P2) of the hydraulic actuator (9) to be tested via the second test piece interface pressure gauge (10); The third interface (3c) of the first pressure control servo valve (3) is connected to the first oil return port (2b) of the test bench (2) via the first low-pressure regulating valve (11); the third interface (4c) of the second pressure control servo valve (4) is connected to the second oil return port (2c) of the test bench (2) via the second low-pressure regulating valve (12); The power supply switching circuit can respectively control the on and off states of the first pressure control servo valve (3) and the second pressure control servo valve (4).

2. The response time testing device for a hydraulic actuator according to claim 1, characterized in that: The power supply switching circuit is composed of a DC power supply (13) and a switching switch (14); the positive pole of the DC power supply (13) is electrically connected to the common terminal of the switching switch (14), the first terminal of the switching switch (14) is electrically connected to the positive pole of the power input of the first pressure control servo valve (3), and the second terminal of the switching switch (14) is electrically connected to the positive pole of the power input of the second pressure control servo valve (4); the negative pole of the DC power supply (13) is electrically connected to the negative pole of the power input of the first pressure control servo valve (3) and the negative pole of the power input of the second pressure control servo valve (4).

3. The response time testing device for a hydraulic actuator according to claim 2, characterized in that: The switching switch (14) adopts a toggle switch structure.

4. The response time testing device for a hydraulic actuator according to any one of claims 1 to 3, characterized in that: The oil supply port (2a) of the test bench (2) is connected to the system pressure regulating valve (5) and the pressure supply gauge (6) in sequence and then divided into two paths.

5. A method for testing the response time of a hydraulic actuator, characterized in that: Implementation based on the response time testing device of the hydraulic actuator according to any one of claims 1 to 4; include: Step S1: configuring the response time test device with working parameters adapted to the extension state of the hydraulic actuator (9) to be tested, specifically: Step S1-1, controlling the response time test device to be in an extended power supply state through the power supply switching circuit, that is, the first pressure control servo valve (3) is in an energized state, and the second pressure control servo valve (4) is in an off-power state; Step S1-2, adjusting the opening of the system pressure regulating valve (5) so that the reading of the first measured component interface pressure gauge (8) reaches the high pressure value of the first pressure port specified by the measured hydraulic actuator (9); Step S1-3, adjusting the opening of the second low-pressure regulating valve (12) so that the reading of the second measured component interface pressure gauge (10) reaches the second pressure port low pressure value specified by the measured hydraulic actuator (9); Step S2: configuring the response time test device with working parameters adapted to the retracted state of the hydraulic actuator (9) to be tested, specifically: Step S2-1, controlling the response time test device to be in a retracted power state through the power switching circuit, that is, the first pressure control servo valve (3) is in a power-off state, and the second pressure control servo valve (4) is in a power-on state; Step S2-2, adjusting the opening of the high-pressure regulating valve (7) so that the reading of the second measured component interface pressure gauge (10) reaches the second pressure port high pressure value specified by the measured hydraulic actuator (9); Step S2-3, adjusting the opening of the first low-pressure regulating valve (11) so that the reading of the first measured component interface pressure gauge (8) reaches the first pressure port low pressure value specified by the measured hydraulic actuator (9); Step S3, after the configuration of the extended state working parameters and the retracted state working parameters of the response time test device is completed, the response time test device is controlled to switch between the extended power state and the retracted power state through the power switching circuit, so that the piston (1) of the hydraulic ram (9) under test moves between the fully extended state and the fully retracted state; Furthermore, by reading the electrical signal output by the LVDT displacement sensor for sensing the telescopic movement of the piston (1) on the hydraulic actuator cylinder (9) under test, the moment when the piston (1) of the hydraulic actuator cylinder (9) under test is fully extended and the moment when the piston (1) is fully retracted are determined, so as to calculate the response time of the hydraulic actuator cylinder (9) under test.

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