CN117703880A - Response time testing device and method for hydraulic actuator cylinder - Google Patents
Response time testing device and method for hydraulic actuator cylinder Download PDFInfo
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- CN117703880A CN117703880A CN202311509160.4A CN202311509160A CN117703880A CN 117703880 A CN117703880 A CN 117703880A CN 202311509160 A CN202311509160 A CN 202311509160A CN 117703880 A CN117703880 A CN 117703880A
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Abstract
The invention discloses a response time testing device and a response time testing method for a hydraulic actuator cylinder, wherein the response time testing device is adopted; the method comprises the steps that S1, the configuration of the working parameters of the extension state of the response time testing device is realized; s2, the working parameter configuration of the retraction state of the response time testing device is realized; under the above configuration, the response time of the tested hydraulic actuator is measured through the step S3; therefore, under the condition that the test bench only provides a single-way hydraulic pressure source, the power supply switching circuit controls the on-off state switching of the first pressure control servo valve and the second pressure control servo valve, so that the instant switching of the hydraulic pressure of the first pressure port and the second pressure port of the tested hydraulic actuator and the flowing direction of the hydraulic fluid is realized, the response time measurement of the tested hydraulic actuator is realized, and in the response time test process, the small fluctuation of the hydraulic pressure, the high accuracy of the response time test result and the safe and stable operation are ensured.
Description
Technical Field
The invention relates to a testing device of civil aviation passenger plane equipment, in particular to a response time testing device and method of a hydraulic actuator cylinder.
Background
As shown in fig. 1, a hydraulic actuator on a civil aircraft has a limited flow hole 1a on a piston 1 for buffering fluid pressure and establishing a left-right end pressure difference of the piston 1, and the piston 1 is actuated under the pushing of the hydraulic pressure of a first pressure port P1 and a second pressure port P2 of the hydraulic actuator. The response time test of the hydraulic actuator cylinder is used for simulating the response time of the hydraulic actuator cylinder under the condition of the load on the aircraft, and is one of important parameters of the hydraulic actuator cylinder test; the instantaneous switching of the fluid pressure and direction is involved, and the actuation time of the piston 1 is precisely calculated.
For example: the response time test parameters of a hydraulic actuator of a certain configuration are as follows, the hydraulic actuator is switched between the following state one and the following state two, and the response actuation time of the extension and retraction of the piston 1 is calculated and is not more than 100 milliseconds.
State one: the pressure of the first pressure port P1 is 500PSIG, the pressure of the second pressure port P2 is 380PSIG, and the fluid direction flows from the first pressure port P1 to the second pressure port P2.
State two: the pressure of the first pressure port P1 is 150PSIG, the pressure of the second pressure port P2 is 320PSIG, and the fluid direction flows from the second pressure port P2 to the first pressure port P1.
The current practice for realizing the response time test of the hydraulic actuator cylinder is as follows: the first pressure port P1 and the second pressure port P2 are controlled by two-way pressure, that is, two pressure sources are required to control the pressures of the first pressure port P1 and the second pressure port P2, respectively. This approach has the following disadvantages: the manufacturing cost of the test equipment is greatly increased, and the two pressure sources have the condition of mutual interference in the switching process, so that transient pressure fluctuation is caused, and the test parameters are distorted.
Disclosure of Invention
One of the technical problems to be solved by the invention is as follows: a response time testing device for a hydraulic actuator is provided.
The technical scheme adopted by the invention is as follows:
a response time testing device for a hydraulic ram, comprising: the test bench, the first pressure control servo valve, the second pressure control servo valve and the power supply switching circuit; the test bench is provided with an oil supply port for providing a single-way hydraulic pressure source, and a first oil return port and a second oil return port which are both used for reflux collection of hydraulic fluid; the first and second pressure control servo valves have the same characteristics as follows, namely: when the power is on, the first interface is communicated with the second interface and disconnected with the third interface; when the power is off, the second interface is communicated with the third interface and disconnected with the first interface;
the oil supply port of the test bench is communicated with the pressure regulating valve of the system and then divided into two paths, the first path is communicated with the first interface of the first pressure control servo valve, and the second path is communicated with the first interface of the second pressure control servo valve through the high pressure regulating valve;
the second interface of the first pressure control servo valve is communicated with a first pressure port of the tested hydraulic actuator through a first tested piece interface pressure gauge; the second interface of the second pressure control servo valve is communicated with a second pressure port of the tested hydraulic actuator through a second tested piece interface pressure gauge;
the third interface of the first pressure control servo valve is communicated with a first oil return port of the test bench through a first low-pressure regulating valve; the third interface of the second pressure control servo valve is communicated with a second oil return port of the test bench through a second low-pressure regulating valve;
the power supply switching circuit can respectively control the on-off states of the first pressure control servo valve and the second pressure control servo valve.
Preferably: the power supply switching circuit consists of a direct-current power supply and a change-over switch; the positive electrode of the direct current power supply is electrically connected with the common wiring terminal of the change-over switch, the first wiring terminal of the change-over switch is electrically connected with the power input positive electrode of the first pressure control servo valve, and the second wiring terminal of the change-over switch is electrically connected with the power input positive electrode of the second pressure control servo valve; the negative electrode of the direct current power supply is electrically connected with the power input negative electrode of the first pressure control servo valve and the power input negative electrode of the second pressure control servo valve. Therefore, the first pressure control servo valve is electrified and the second pressure control servo valve is powered off by toggling the change-over switch to the state shown in fig. 2; by pulling the change-over switch to the state shown in fig. 3, the first pressure control servo valve can be powered off and the second pressure control servo valve can be powered on.
Preferably: the change-over switch adopts a toggle switch structure.
Preferably: the oil supply port of the test board is sequentially communicated with the system pressure regulating valve and the pressure supply pressure gauge and then is divided into two paths so as to supply hydraulic pressure to the response time testing device through the oil supply port of the test board by the pressure supply pressure gauge.
The second technical problem to be solved by the invention is as follows: a method for testing response time of a hydraulic actuator is provided.
The technical scheme adopted by the invention is as follows:
a response time testing method of a hydraulic actuator cylinder is characterized by comprising the following steps of: a response time testing device based on the hydraulic actuator cylinder;
comprising the following steps:
step S1, referring to fig. 2, the response time testing device is configured with working parameters adapted to the extension state of the tested hydraulic actuator, specifically:
step S1-1, controlling the response time testing device to be in a state of stretching out of power supply through a power supply switching circuit, namely: the first pressure control servo valve is in an energized state, and the second pressure control servo valve is in a de-energized state;
so that the hydraulic fluid output from the oil supply port of the test bench flows in the following route:
the method comprises the steps of oil supply port of a test bench, system pressure regulating valve, pressure supply pressure gauge, first port of a first pressure control servo valve, second port of a first pressure control servo valve, first tested piece port pressure gauge, first pressure port of a tested hydraulic actuator, second tested piece port pressure gauge, second port of a second pressure control servo valve, third port of a second pressure control servo valve, second low pressure regulating valve and second oil return port of the test bench.
At this time, the piston of the hydraulic cylinder under test is in an extended state.
S1-2, adjusting the opening degree of a pressure regulating valve of the system to enable the reading of a first measured piece interface pressure gauge (namely the pressure of a first pressure port of a measured hydraulic actuator) to reach a high-pressure value of the first pressure port regulated by the measured hydraulic actuator;
s1-3, adjusting the opening degree of a second low-pressure adjusting valve to enable the reading of a second measured piece interface pressure gauge (namely the pressure of a second pressure port of a measured hydraulic actuator) to reach a second pressure port low-pressure value specified by the measured hydraulic actuator;
thus, the piston of the hydraulic ram to be measured is brought into an extended state by step S1-1, and the hydraulic ram to be measured is brought into a state one, i.e., the piston thereof is brought into a fully extended state, by step S1-2 and step S1-3.
Step S2, referring to fig. 3, the response time testing device is configured with working parameters adapted to the retraction state of the tested hydraulic actuator, specifically:
step S2-1, controlling the response time testing device to be in a retracted power supply state through a power supply switching circuit, namely: the first pressure control servo valve is in a power-off state, and the second pressure control servo valve is in a power-on state;
so that the hydraulic fluid output from the oil supply port of the test bench flows in the following route:
the method comprises the steps of oil supply port of a test bench, system pressure regulating valve, pressure supply pressure gauge, high pressure regulating valve, first port of a second pressure control servo valve, second port of a second tested piece port pressure gauge, second pressure port of a tested hydraulic actuator cylinder, first tested piece port pressure gauge, second port of a first pressure control servo valve, third port of a first pressure control servo valve, first low pressure regulating valve and first oil return port of a test bench.
At this time, the piston of the hydraulic cylinder under test is in a retracted state.
S2-2, adjusting the opening degree of the high-pressure regulating valve to enable the reading of the second measured piece interface pressure gauge (namely the pressure of the second pressure port of the measured hydraulic actuator) to reach the high-pressure value of the second pressure port regulated by the measured hydraulic actuator;
s2-3, adjusting the opening degree of the first low-pressure adjusting valve to enable the reading of the first measured piece interface pressure gauge (namely the pressure of the first pressure port of the measured hydraulic actuator) to reach the low-pressure value of the first pressure port regulated by the measured hydraulic actuator;
thus, the piston of the hydraulic ram under test is brought into a retracted state by step S2-1, and the hydraulic ram under test is brought into a second state, i.e., its piston is brought into a fully retracted state, by steps S2-2 and S2-3.
For the tested hydraulic actuator cylinder with a determined model, 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 a manufacturer when the piston is in a fully extended state and in a fully retracted state, for example: the four values of the hydraulic actuators of the certain configuration described in the background art are, in order, 500PSIG and 380PSIG, 320PSIG and 150PSIG.
Step S3, after the configuration of the working parameters of the extension state and the retraction state of the response time testing device is completed, the response time testing device is controlled to switch between the extension power supply state and the retraction power supply state through a power supply switching circuit, so that the piston of the tested hydraulic actuator cylinder moves between the full extension state and the full retraction state;
and the time when the piston of the tested hydraulic actuator is fully extended and the time when the piston of the tested hydraulic actuator is fully retracted are determined by reading the electric signals output by the LVDT displacement sensor on the tested hydraulic actuator for sensing the telescopic movement of the piston, so that the response time of the tested hydraulic actuator is calculated.
And S4, after the response time test of the tested hydraulic actuator cylinder is completed, closing the system pressure regulating valve so as to reduce the hydraulic pressure of the response time test device to zero, and closing the direct current power supply.
Therefore, under the condition that the test bench only provides a single-way hydraulic pressure source, the invention can realize the instant switching of the hydraulic pressure of the first pressure port and the second pressure port of the tested hydraulic actuator and the flowing direction of the hydraulic fluid by controlling the switching of the on-off states of the first pressure control servo valve and the second pressure control servo valve through the power supply switching circuit, so as to realize the response time measurement of the tested hydraulic actuator, ensure that the hydraulic pressure fluctuation is small, the accuracy of the response time test result is high, the operation is safe and stable, and solve the problems that the manufacturing cost of test equipment is high due to the adoption of two hydraulic pressure sources in the prior art, and the problem that the pressure fluctuation is caused by the mutual interference of the two hydraulic pressure sources when the pressure state is switched.
Compared with the prior art, the invention has the following beneficial effects:
the first, the invention adopts the 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 pressure supply pressure gauge, a high pressure regulating valve, a first tested piece interface pressure gauge, a second tested piece interface pressure gauge, a first low pressure regulating valve, a second low pressure regulating valve and a power supply switching circuit; the piston of the tested hydraulic actuator cylinder is in an extending state through the step S1-1, and the piston of the tested hydraulic actuator cylinder is in a complete extending state through the step S1-2 and the step S1-3, so that the extending state working parameter configuration of the response time testing device is realized; the piston of the tested hydraulic actuator cylinder is in a retraction state through the step S2-1, and the piston of the tested hydraulic actuator cylinder is in a complete retraction state through the step S2-2 and the step S2-3, so that the retraction state working parameter configuration of the response time testing device is realized; under the above configuration, the response time of the tested hydraulic actuator is measured through the step S3; therefore, under the condition that the test bench only provides a single-way hydraulic pressure source, the invention can realize the instant switching of the hydraulic pressure of the first pressure port and the second pressure port of the tested hydraulic actuator and the flowing direction of the hydraulic fluid by controlling the switching of the on-off states of the first pressure control servo valve and the second pressure control servo valve through the power supply switching circuit, so as to realize the response time measurement of the tested hydraulic actuator, ensure that the hydraulic pressure fluctuation is small, the accuracy of the response time test result is high, the operation is safe and stable, and solve the problems that the manufacturing cost of test equipment is high due to the adoption of two hydraulic pressure sources in the prior art, and the problem that the pressure fluctuation is caused by the mutual interference of the two hydraulic pressure sources when the pressure state is switched.
And secondly, the power supply switching circuit is formed by the direct-current power supply and the change-over switch, the on-off state of the first pressure control servo valve and the second pressure control servo valve can be conveniently switched by toggling the change-over switch, and the execution efficiency of the response time test of the hydraulic actuator can be effectively improved.
Drawings
The invention is described in further detail below with reference to the attached drawings and to specific examples:
FIG. 1 is a schematic illustration of a hydraulic ram;
FIG. 2 is a schematic diagram of a response time testing apparatus of the present invention with a hydraulic ram under test in a condition;
fig. 3 is a schematic diagram of the response time testing device of the present invention when the tested hydraulic ram is in state two.
Detailed Description
The present invention will be described in detail with reference to the following examples and the accompanying drawings to help those skilled in the art to better understand the inventive concept of the present invention, but the scope of the claims of the present invention is not limited to the following examples, and it is intended that those skilled in the art will not make any other examples of the inventive concept without departing from the scope of the inventive concept of the present invention.
Example 1
As shown in fig. 1 to 3, a first embodiment of the present invention discloses a response time testing device for a hydraulic actuator, including: the test bench 2, the first pressure control servo valve 3, the second pressure control servo valve 4 and the power supply switching circuit; wherein the test bench 2 is provided with an oil supply port 2a for providing a single-way hydraulic pressure source, and a first oil return port 2b and a second oil return port 2c which are both used for reflux collection of hydraulic fluid; the first pressure-controlled servo valve 3 and the second pressure-controlled servo valve 4 have the same characteristics as follows, namely: when the power is on, the first interface is communicated with the second interface and disconnected with the third interface; when the power is off, the second interface is communicated with the third interface and disconnected with the first interface;
the oil supply port 2a of the test bench 2 is communicated with the system pressure regulating valve 5 and then is divided into two paths, the first path is communicated with the first port 3a of the first pressure control servo valve 3, and the second path is communicated with the first port 4a of the second pressure control servo valve 4 through the high pressure regulating valve 7;
the second port 3b of the first pressure control servo valve 3 is communicated with a first pressure port P1 of a tested hydraulic actuator 9 through a first tested piece port pressure gauge 8; the second interface 4b of the second pressure control servo valve 4 is communicated with a second pressure port P2 of the tested hydraulic actuator 9 through a second tested piece interface pressure gauge 10;
the third interface 3c of the first pressure control servo valve 3 is communicated with the first oil return port 2b of the test bench 2 through the first low-pressure regulating valve 11; the third interface 4c of the second pressure control servo valve 4 is communicated with the second oil return port 2c of the test bench 2 through a second low-pressure regulating valve 12;
the power supply switching circuit can respectively control the on-off states of the first pressure control servo valve 3 and the second pressure control servo valve 4.
The foregoing is a basic implementation of the first embodiment, and further optimization, improvement and limitation may be performed based on the basic implementation:
preferably: the power supply switching circuit consists of a direct-current power supply 13 and a change-over switch 14; the positive electrode of the direct current power supply 13 is electrically connected with the common wiring terminal of the change-over switch 14, the first wiring terminal of the change-over switch 14 is electrically connected with the positive electrode of the power input of the first pressure control servo valve 3, and the second wiring terminal of the change-over switch 14 is electrically connected with the positive electrode of the power input of the second pressure control servo valve 4; the negative electrode of the direct current power supply 13 is electrically connected with the power input negative electrode of the first pressure control servo valve 3 and the power input negative electrode of the second pressure control servo valve 4. Thus, by toggling the change-over switch 14 to the state shown in fig. 2, the first pressure control servo valve 3 can be energized and the second pressure control servo valve 4 can be deenergized; by turning the change-over switch 14 to the state shown in fig. 3, the first pressure control servo valve 3 can be powered off and the second pressure control servo valve 4 can be powered on.
Preferably: the change-over switch 14 adopts a toggle switch structure.
Preferably: the oil supply port 2a of the test bench 2 is sequentially communicated with the system pressure regulating valve 5 and the pressure supply pressure gauge 6 and then is divided into two paths so as to test the hydraulic pressure provided by the oil supply port 2a of the test bench 2 to the response time testing device through the pressure supply pressure gauge 6.
Example two
As shown in fig. 1 to 3, a second embodiment of the present invention discloses a response time testing method of a hydraulic actuator, which is implemented based on the response time testing device of the hydraulic actuator of the first embodiment;
comprising the following steps:
step S1, referring to fig. 2, the response time testing device is configured with working parameters adapted to the extension state of the tested hydraulic actuator 9, specifically:
step S1-1, controlling the response time testing device to be in a state of stretching out of power supply through a power supply switching circuit, namely: the first pressure control servo valve 3 is in an energized state, and the second pressure control servo valve 4 is in a de-energized state;
so that the hydraulic fluid output from the oil supply port 2a of the test bench 2 flows in the following way:
the oil supply port 2a of the test bench 2, the system pressure regulating valve 5, the pressure supply pressure gauge 6, the first port 3a of the first pressure control servo valve 3, the second port 3b of the first pressure control servo valve 3, the first tested piece port pressure gauge 8, the first pressure port P1 of the tested hydraulic actuator 9, the second pressure port P2 of the tested hydraulic actuator 9, the second tested piece port pressure gauge 10, the second port 4b of the second pressure control servo valve 4, the third port 4c of the second pressure control servo valve 4, the second low pressure regulating valve 12 and the second oil return port 2c of the test bench 2.
At this time, the piston 1 of the hydraulic cylinder 9 under test is in an extended state.
S1-2, adjusting the opening degree of a system pressure adjusting valve 5 to enable the reading of a first measured piece interface pressure gauge 8 (namely the pressure of a first pressure port P1 of a measured hydraulic actuator cylinder 9) to reach a first pressure port high pressure value regulated by the measured hydraulic actuator cylinder 9;
step S1-3, adjusting the opening degree of the second low pressure adjusting valve 12 to enable the reading of the second measured piece interface pressure gauge 10 (namely, the pressure of the second pressure port P2 of the measured hydraulic actuator 9) to reach the second pressure port low pressure value regulated by the measured hydraulic actuator 9;
thereby, the piston 1 of the hydraulic ram 9 to be measured is brought into the extended state by step S1-1, and the hydraulic ram 9 to be measured is brought into the state one, i.e., the piston 1 thereof is brought into the fully extended state by step S1-2 and step S1-3.
Step S2, see fig. 3, of configuring the response time testing device with the operating parameters adapted to the retraction state of the hydraulic ram 9 under test, specifically:
step S2-1, controlling the response time testing device to be in a retracted power supply state through a power supply switching circuit, namely: 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;
so that the hydraulic fluid output from the oil supply port 2a of the test bench 2 flows in the following way:
the test bench 2 comprises an oil supply port 2a, a system pressure regulating valve 5, a pressure supply pressure gauge 6, a high pressure regulating valve 7, a first port 4a of a second pressure control servo valve 4, a second port 4b of the second pressure control servo valve 4, a second tested piece port pressure gauge 10, a second pressure port P2 of a tested hydraulic actuator 9, a first pressure port P1 of the tested hydraulic actuator 9, a first tested piece port pressure gauge 8, a second port 3b of the first pressure control servo valve 3, a third port 3c of the first pressure control servo valve 3, a first low pressure regulating valve 11 and a first oil return port 2b of the test bench 2.
At this time, the piston 1 of the hydraulic cylinder 9 under test is in a retracted state.
Step S2-2, adjusting the opening degree of the high-pressure regulating valve 7 to enable the reading of the second measured piece interface pressure gauge 10 (namely, the pressure of the second pressure port P2 of the measured hydraulic actuator 9) to reach the high-pressure value of the second pressure port regulated by the measured hydraulic actuator 9;
step S2-3, adjusting the opening degree of the first low pressure adjusting valve 11 to enable the reading of the first measured piece interface pressure gauge 8 (namely, the pressure of the first pressure port P1 of the measured hydraulic actuator 9) to reach the low pressure value of the first pressure port regulated by the measured hydraulic actuator 9;
thereby, the piston 1 of the hydraulic ram 9 to be measured is brought into the retracted state by step S2-1, and the hydraulic ram 9 to be measured is brought into the second state, i.e., the piston 1 thereof is brought into the fully retracted state by step S2-2 and step S2-3.
For the tested hydraulic actuator 9 of a certain model, 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 a manufacturer when the piston 1 is in a fully extended state and in a fully retracted state, for example: the four values of the hydraulic actuators of the certain configuration described in the background art are, in order, 500PSIG and 380PSIG, 320PSIG and 150PSIG.
Step S3, after the configuration of the working parameters of the extension state and the retraction state of the response time testing device is completed, the response time testing device is controlled to switch between the extension power supply state and the retraction power supply state through a power supply switching circuit, so that the piston 1 of the tested hydraulic actuator 9 moves between the full extension state and the full retraction state;
and, by reading the electric signal output by the LVDT displacement sensor for sensing the telescopic movement of the piston 1 on the measured hydraulic actuator 9, the time when the piston 1 of the measured hydraulic actuator 9 is fully extended and the time when it is fully retracted are determined, so as to calculate the response time of the measured hydraulic actuator 9.
And S4, after the response time test of the tested hydraulic actuator cylinder 9 is completed, closing the system pressure regulating valve 5 so as to reduce the hydraulic pressure of the response time testing device to zero, and closing the direct current power supply 13.
Therefore, under the condition that the test bench 2 only provides a single-way hydraulic pressure source, the invention can realize the instant switching of the hydraulic pressure of the first pressure port P1 and the second pressure port P2 of the tested hydraulic actuator 9 and the flowing direction of the hydraulic fluid by controlling the switching of the on-off states of the first pressure control servo valve 3 and the second pressure control servo valve 4 through the power supply switching circuit, so as to realize the response time measurement of the tested hydraulic actuator 9, ensure that the hydraulic pressure fluctuation is small, the accuracy of the response time test result is high, the operation is safe and stable, and solve the problems that the manufacturing cost of test equipment is high due to the adoption of two hydraulic pressure sources in the prior art, and the problem that the test result is distorted due to the pressure fluctuation caused by the mutual interference of the two hydraulic pressure sources when the pressure state is switched.
The present invention is not limited to the above-described embodiments, and according to the above-described matters, the present invention may be modified, replaced or altered in various equivalent ways without departing from the basic technical spirit of the present invention, all falling within the scope of the present invention, according to the general technical knowledge and conventional means in the art.
Claims (5)
1. A response time testing device for a hydraulic ram, comprising: the test bench (2), the first pressure control servo valve (3), the second pressure control servo valve (4) and the power supply switching circuit; the test bench (2) is provided with an oil supply port (2 a) for providing a single-way hydraulic pressure source, and a first oil return port (2 b) and a second oil return port (2 c) which are both used for reflux collection of hydraulic fluid; the first pressure-controlled servo valve (3) and the second pressure-controlled servo valve (4) have the same characteristics, namely: when the power is on, the first interface is communicated with the second interface and disconnected with the third interface; when the power is off, the second interface is communicated with the third interface and disconnected with the first interface;
the oil supply port (2 a) of the test bench (2) is communicated with the system pressure regulating valve (5) and then is divided into two paths, the first path is communicated with the first interface (3 a) of the first pressure control servo valve (3), and the second path is communicated with the first interface (4 a) of the second pressure control servo valve (4) through the high pressure regulating valve (7);
the second interface (3 b) of the first pressure control servo valve (3) is communicated with a first pressure port (P1) of a tested hydraulic actuator cylinder (9) through a first tested piece interface pressure gauge (8); the second interface (4 b) of the second pressure control servo valve (4) is communicated with a second pressure port (P2) of the tested hydraulic actuator cylinder (9) through a second tested piece interface pressure gauge (10);
the third interface (3 c) of the first pressure control servo valve (3) is communicated with the first oil return port (2 b) of the test bench (2) through the first low-pressure regulating valve (11); the third interface (4 c) of the second pressure control servo valve (4) is communicated with the second oil return port (2 c) of the test bench (2) through a second low-pressure regulating valve (12);
the power supply switching circuit can respectively control the on-off states of the first pressure control servo valve (3) and the second pressure control servo valve (4).
2. The response time testing device of a hydraulic ram of claim 1, wherein: the power supply switching circuit consists of a direct-current power supply (13) and a change-over switch (14); the positive electrode of the direct current power supply (13) is electrically connected with the common wiring end of the change-over switch (14), the first wiring end of the change-over switch (14) is electrically connected with the power input positive electrode of the first pressure control servo valve (3), and the second wiring end of the change-over switch (14) is electrically connected with the power input positive electrode of the second pressure control servo valve (4); the negative electrode of the direct current power supply (13) is electrically connected with the power input negative electrode of the first pressure control servo valve (3) and the power input negative electrode of the second pressure control servo valve (4).
3. The response time testing device of a hydraulic ram of claim 2, wherein: the change-over switch (14) adopts a toggle switch structure.
4. A response time testing device for a hydraulic ram according to any one of claims 1 to 3, wherein: the oil supply port (2 a) of the test bench (2) is sequentially communicated with the system pressure regulating valve (5) and the pressure supply pressure gauge (6) and then is divided into two paths.
5. A response time testing method of a hydraulic actuator cylinder is characterized by comprising the following steps of: a response time testing device based on a hydraulic ram according to any one of claims 1 to 4;
comprising the following steps:
step S1, configuring the working parameters of the response time testing device, which are suitable for the extending state of the tested hydraulic actuator cylinder (9), specifically:
step S1-1, controlling the response time testing device to be in a state of stretching out of power supply through a power supply switching circuit, namely: the first pressure control servo valve (3) is in an energized state, and the second pressure control servo valve (4) is in a de-energized state;
s1-2, adjusting the opening degree of a system pressure regulating valve (5) to enable the reading of a first measured piece interface pressure gauge (8) to reach a first pressure port high pressure value specified by a measured hydraulic actuator cylinder (9);
s1-3, adjusting the opening degree of a second low-pressure adjusting valve (12) to enable the reading of a second measured piece interface pressure gauge (10) to reach a second pressure port low-pressure value specified by a measured hydraulic actuator cylinder (9);
step S2, configuring the response time testing device with the working parameters of the retraction state adapted to the tested hydraulic actuator cylinder (9), specifically:
step S2-1, controlling the response time testing device to be in a retracted power supply state through a power supply switching circuit, namely: the first pressure control servo valve (3) is in a power-off state, and the second pressure control servo valve (4) is in an power-on state;
s2-2, adjusting the opening degree of a high-pressure regulating valve (7) to enable the reading of a second measured piece interface pressure gauge (10) to reach a second pressure port high-pressure value specified by a measured hydraulic actuator cylinder (9);
s2-3, adjusting the opening degree of a first low-pressure adjusting valve (11) to enable the reading of a first measured piece interface pressure gauge (8) to reach a first pressure port low-pressure value specified by a measured hydraulic actuator cylinder (9);
step S3, after the configuration of the working parameters of the extension state and the retraction state of the response time testing device is completed, the response time testing device is controlled to switch between the extension power supply state and the retraction power supply state through a power supply switching circuit, so that the piston (1) of the tested hydraulic actuator cylinder (9) moves between the full extension state and the full retraction state;
and, through reading the electric signal outputted by the LVDT displacement sensor used for inducing the telescopic movement of the piston (1) on the tested hydraulic actuator cylinder (9), confirm the moment when the piston (1) of the tested hydraulic actuator cylinder (9) is fully extended and the moment when it is fully retracted, in order to calculate and obtain the response time of the tested hydraulic actuator cylinder (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311509160.4A CN117703880A (en) | 2023-11-14 | 2023-11-14 | Response time testing device and method for hydraulic actuator cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311509160.4A CN117703880A (en) | 2023-11-14 | 2023-11-14 | Response time testing device and method for hydraulic actuator cylinder |
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| CN202311509160.4A Pending CN117703880A (en) | 2023-11-14 | 2023-11-14 | Response time testing device and method for hydraulic actuator cylinder |
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