CN218207318U - Testing device for electro-hydraulic actuating mechanism - Google Patents
Testing device for electro-hydraulic actuating mechanism Download PDFInfo
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- CN218207318U CN218207318U CN202221958961.XU CN202221958961U CN218207318U CN 218207318 U CN218207318 U CN 218207318U CN 202221958961 U CN202221958961 U CN 202221958961U CN 218207318 U CN218207318 U CN 218207318U
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Abstract
The utility model discloses a testing arrangement for electricity liquid actuating mechanism. The device comprises a gas drive oil pump, an oil outlet branch, an oil return branch, a three-position four-way reversing valve and a test oil way; the gas drive oil pump is connected with the three-position four-way reversing valve through an oil outlet branch; the test oil way comprises a first test branch and a second test branch, one end of the first test branch and one end of the second test branch are respectively connected with the three-position four-way reversing valve, and the other end of the first test branch and the other end of the second test branch are respectively provided with an interface connected with the electro-hydraulic actuating mechanism to be tested; the three-position four-way reversing valve is connected with the oil return branch. The device of the utility model can output 0-35MPa of hydraulic pressure for carrying out related hydraulic tests, and can adjust the working pressure by adjusting the driving air pressure, thereby meeting the test requirements of different pressures; meanwhile, the test bed adopts the air-driven liquid pump as power, the air-driven liquid pump is driven by compressed air to generate high pressure, and the test bed has the characteristics of small volume, light weight, environmental protection, low noise and long service life.
Description
Technical Field
The utility model relates to an electricity liquid actuating mechanism's hydraulic test technique, concretely relates to a testing arrangement for electricity liquid actuating mechanism.
Background
In the production process of the electro-hydraulic actuator, a series of test tests need to be carried out on various hydraulic elements such as an oil cylinder, an integrated hydraulic valve, a hydraulic joint and a pipeline of the electro-hydraulic actuator respectively so as to verify whether the performance of the hydraulic elements meets the requirements of the technical conditions of the actuator.
In the prior art, a hydraulic test bed is mainly adopted for testing experiments, a motor is adopted for driving a hydraulic pump to output power oil in the traditional hydraulic test bed, and the motor is usually large in size, large in noise and high in energy consumption.
Disclosure of Invention
To prior art's defect or not enough, the utility model provides a testing arrangement for electric liquid actuating mechanism.
Therefore, the utility model provides an electricity liquid actuating mechanism's testing arrangement includes: the device comprises a gas drive oil pump, an oil outlet branch, an oil return branch, a three-position four-way reversing valve and a test oil way;
the gas-driven oil pump is connected with the three-position four-way reversing valve through an oil outlet branch;
the test oil way comprises a first test branch and a second test branch, one end of the first test branch and one end of the second test branch are respectively connected with the three-position four-way reversing valve, and the other end of the first test branch and the other end of the second test branch are respectively provided with an interface connected with the electro-hydraulic actuator to be tested;
and the three-position four-way reversing valve is connected with the oil return branch.
Further, a first one-way valve is arranged at the outlet of the gas-driven oil pump.
Furthermore, a pressure gauge and a filter are arranged on the oil outlet branch.
The oil outlet branch is connected with the oil outlet branch, and the oil return branch is connected with the oil outlet branch; the second manual stop valve is connected with the oil outlet branch and the oil return branch.
Further, a third manual stop valve, a pressure gauge and a pressure sensor are arranged on the first test branch; the second test branch is provided with a fourth manual stop valve, a pressure gauge and a pressure sensor.
And the manual oil outlet branch is connected with the gas-liquid driven pump in parallel, and a manual pump is arranged on the manual oil outlet branch.
Further, a second one-way valve is arranged at the outlet of the manual pump.
Further, the manual pump inlet is provided with an oil absorption filter and a first manual stop valve.
Further, the gas-liquid drive pump is connected with the oil outlet branch through an energy accumulator.
Further, still include with the drive gas branch road of gas drive oil pump connection, drive gas branch road (1) is equipped with air supply interface, compressed air filter, relief pressure valve and air supply manometer.
The utility model discloses a testing arrangement adopts the gas to drive the liquid pump as power, drives the gas through compressed air and drives the liquid pump and produce the high pressure, has small, light environmental protection, low noise and long service life characteristics. The utility model discloses a testing arrangement can be used to the hydraulic pressure test of other various small-size containers, valve, testing tool, instrument etc..
Drawings
Fig. 1 is a schematic view of the structural principle of the present invention.
Detailed Description
Unless otherwise specified, the terms herein are to be understood in light of the knowledge of one of ordinary skill in the relevant art.
Referring to fig. 1, the testing device of the present invention comprises a gas-driven oil pump 3.11, an oil outlet branch 3.1, an oil return branch 3.3, a three-position four-way reversing valve 3.9 and a testing oil path; wherein: the outlet of the gas displacement pump is connected with the three-position four-way reversing valve through an oil outlet branch; the test oil way comprises a first test branch 3.4 and a second test branch 3.5, one end of the first test branch and one end of the second test branch are respectively connected with the three-position four-way reversing valve, and the other end of the first test branch and the other end of the second test branch are respectively provided with an interface 1 and an interface 2 which are respectively connected with the electro-hydraulic actuator to be tested; and the three-position four-way reversing valve is connected with the oil return branch.
The testing device adopts the air-driven liquid pump 3.11 as power, and the compressed air drives the air-driven liquid pump to pump out the hydraulic oil; the gas-driven oil pump and the oil return branch are both connected with the mailbox;
taking the oil cylinder in the electro-hydraulic actuator as an example for testing, during testing, the interface 1 is connected with a rodless cavity of the oil cylinder of the electro-hydraulic actuator to be tested; the interface 2 is connected with a piston rod cavity of an oil cylinder of the electro-hydraulic actuator to be tested;
when the three-position four-way reversing valve 3.9 is in the middle position, four oil ports (namely four ports connecting the first testing branch, the second testing branch, the oil return branch and the oil outlet branch, which are respectively represented by a port A, a port B, a port P and a port T) of the three-position four-way reversing valve 3.9 are not communicated with each other, and no matter whether the air-driven liquid pump 3.11 is started or not, no hydraulic oil flows out from the port A and the port B of the three-position four-way reversing valve;
when the three-position four-way reversing valve 3.9 is switched to the parallel position, a port P of the three-position four-way manual reversing valve 3.9 is communicated with a port A, and a port T of the three-position four-way manual reversing valve 3.9 is communicated with a port B; starting the air-driven liquid pump 3.11, allowing hydraulic oil to sequentially pass through the oil outlet branch, the P port of the manual reversing valve, the A port of the manual reversing valve and the rodless cavity of the oil cylinder of the electro-hydraulic actuator to be tested from the first testing branch 3.4, allowing a piston of the hydraulic oil cylinder to drive a piston rod to move towards the direction of the piston rod under the pushing of the hydraulic oil, allowing the piston rod cavity of the oil cylinder to be communicated with the B port of the three-position four-way manual reversing valve 3.9, allowing the hydraulic oil in the piston rod cavity to sequentially pass through the second testing branch 3.5, the B port of the three-position four-way manual reversing valve 3.9, the T port of the three-position four-way manual reversing valve 3.9 and the oil outlet branch and then enter the oil tank, and allowing the piston rod of the oil cylinder to extend out.
When the three-position four-way reversing valve 3.9 is switched to the cross position, a port P of the three-position four-way manual reversing valve 3.9 is communicated with a port B, and a port T of the three-position four-way manual reversing valve 3.9 is communicated with a port A; starting the gas-driven liquid pump 3.11, allowing hydraulic oil to sequentially pass through the oil outlet branch, the port P of the manual reversing valve, the port B of the manual reversing valve and the port B of the second testing branch 3.5 to enter a piston rod cavity of the electro-hydraulic actuator to be tested, driving a piston of the hydraulic oil cylinder to move in the opposite direction of the piston rod under the pushing of the hydraulic oil, allowing the hydraulic oil without the rod cavity to sequentially pass through the port A of the first testing branch 3.4, the port A of the three-position four-way manual reversing valve 3.9, the port T of the three-position four-way manual reversing valve 3.9 and the oil outlet branch and then enter an oil tank, and withdrawing the piston rod of the oil cylinder.
The aforesaid is passed through the utility model discloses testing arrangement carries out the experimental description of action to electric liquid actuating mechanism's hydraulic cylinder, but the experimental similar experiment of other hydraulic component of electric liquid actuating mechanism can refer to above-mentioned test method, and the hydraulic component replacement hydraulic cylinder that will await measuring can.
In addition to the above solutions, in some exemplary solutions, the following improved or alternative solutions may be further adopted.
In a further scheme, a first check valve 3.12 is arranged at the outlet of the gas-liquid driving pump and used for preventing the system pressure from suddenly rising to impact the gas-liquid driving pump.
In the further scheme, be equipped with installation manometer 3.7 and filter 3.8 on the oil outlet branch road, wherein the manometer is used for detecting pump outlet pressure, and filter 3.8 are used for filtering hydraulic oil. In still some schemes, an overflow valve 3.31 for preventing the system from exceeding the safety pressure and a second manual stop valve 3.32 for pressure relief are arranged on the oil outlet branch, and the outlet of the overflow valve 3.31 and the outlet of the second manual stop valve 3.32 are both communicated with the oil return branch.
In other schemes, a third manual stop valve 3.41, a pressure gauge 3.42 and a pressure sensor 3.43 are arranged on the first testing branch 3.4; the second testing branch 3.5 is provided with a fourth manual stop valve 3.51, a pressure gauge 3.52 and a pressure sensor 3.53, and in the testing process, the third manual stop valve and the fourth manual stop valve are both in an open state; when the pressure maintaining sealing performance test needs to be carried out on the element to be tested, in order to avoid the influence of leakage of pipeline valves of the hydraulic test bed on the test result, the manual stop valves with good sealing performance (namely, the third manual stop valve and the fourth manual stop valve) are used for cutting off the oil way, and a pressure maintaining cavity is formed between the stop valves and the element to be tested.
In some schemes, the testing device further comprises a manual oil outlet branch 3.2 connected with the gas-liquid drive pump in parallel, a manual pump 3.23 is arranged on the manual oil outlet branch, and the outlet of the manual pump is connected with the three-position four-way reversing valve through the oil outlet branch and used for realizing manual pressurization. In a further scheme, the outlet of the manual pump is connected with the three-position four-way reversing valve 3.9 through the second one-way valve 3.24, so that impact on the manual pump caused by sudden rise of system pressure can be prevented. Further, the manual pump entry is equipped with oil absorption filter 3.22 and first manual stop valve 3.21 in proper order for be connected with hydraulic tank 2.
In a further scheme, the gas-driven oil pump or the manual pump is connected with the oil outlet branch through the energy accumulator 3.6. The accumulator is used for absorbing hydraulic impact, stabilizing the system pressure, for example, the pre-charging pressure of the accumulator is 18MPa, when the working pressure of the system generates pressure impact higher than the pre-charging pressure in the system due to the operation of reversing or sudden stopping of an executing element, and the like, nitrogen in the accumulator is compressed, and the pressure is rapidly reduced, so that the impact is eliminated, and the safety of the system is protected.
In still some further schemes, the testing device further comprises a driving gas branch 1 for supplying gas to the gas-driven liquid pump 3.11, wherein the driving gas branch 1 comprises a gas source interface 1.1, a compressed air filter 1.2 communicated with the gas source interface 1.1, a pressure reducing valve 1.3 communicated with an outlet of the compressed air filter 1.2, and a gas source pressure gauge 1.4 communicated with an outlet of the pressure reducing valve 1.3. The inlet of the driving air source is communicated with the air-driven liquid pump after passing through the air filter, the pressure reducing valve and the manual stop valve. A safety valve 1.5 and a compressed air manual stop valve 1.6 which are communicated with outlets of an air source pressure gauge 1.4 and a pressure reducing valve 1.3 are further arranged on the driving air branch; a pressure gauge is arranged between the pressure reducing valve and the manual stop valve for monitoring the pressure of the driving air, and a safety valve is arranged for preventing the impact of sudden pressure rise on the system.
In the further scheme, the oil tank comprises a hydraulic oil tank 2.5, an oil drainage stop valve 2.1 is arranged at the bottom of the mailbox, an oil level indicator 2.2 is arranged on the side face of the mailbox, an oil absorption filter 2.3 communicated with an inlet of a gas-driven liquid pump 3.11 or/and a manual pump 3.13 is arranged in the oil tank, and an air filter 2.4 is arranged at the top of the oil tank 2.5.
Claims (10)
1. A test device for an electro-hydraulic actuator, comprising: the device comprises a gas drive oil pump (3.11), an oil outlet branch (3.1), an oil return branch (3.3), a three-position four-way reversing valve (3.9) and a test oil way;
the gas-driven oil pump is connected with the three-position four-way reversing valve through an oil outlet branch;
the test oil way comprises a first test branch (3.4) and a second test branch (3.5), one end of the first test branch and one end of the second test branch are respectively connected with the three-position four-way reversing valve, and the other end of the first test branch and the other end of the second test branch are respectively provided with an interface connected with the electro-hydraulic actuating mechanism to be tested;
and the three-position four-way reversing valve is connected with the oil return branch.
2. The test device for electrohydraulic actuators according to claim 1, characterized in that a first non-return valve (3.12) is provided at the outlet of the gas driven oil pump.
3. The test device for the electro-hydraulic actuator according to claim 1, wherein the oil outlet branch is further provided with a pressure gauge (3.7) and a filter (3.8).
4. The test device for the electro-hydraulic actuator according to claim 1, further comprising an overflow valve (3.31) and a second manual stop valve (3.32), wherein the overflow valve is connected with the oil outlet branch and the oil return branch; the second manual stop valve is connected with the oil outlet branch and the oil return branch.
5. The test device for electrohydraulic actuators according to claim 1, characterized in that a third manual shut-off valve (3.41), a pressure gauge (3.42) and a pressure sensor (3.43) are provided on the first test branch (3.4); and the second testing branch (3.5) is provided with a fourth manual stop valve (3.51), a pressure gauge (3.52) and a pressure sensor (3.53).
6. The test device for the electro-hydraulic actuator according to claim 1, further comprising a manual oil outlet branch (3.2) connected in parallel with the gas-driven oil pump, wherein a manual pump (3.23) is arranged on the manual oil outlet branch.
7. The test device for electro-hydraulic actuators according to claim 6, characterized in that a second non-return valve (3.24) is provided at the outlet of the manual pump.
8. The test device for electro-hydraulic actuators according to claim 6, characterized in that the manual pump inlet is provided with an oil suction filter (3.22) and a first manual shut-off valve (3.21).
9. The test device for the electro-hydraulic actuator according to claim 1 or 6, wherein the gas-driven oil pump is connected with the oil outlet branch through an accumulator.
10. The test device for the electro-hydraulic actuator according to claim 1, further comprising a driving air branch (1) connected with the air-driven oil pump (3.11), wherein the driving air branch (1) is provided with an air source interface (1.1), a compressed air filter (1.2), a pressure reducing valve (1.3) and an air source pressure gauge (1.4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221958961.XU CN218207318U (en) | 2022-07-27 | 2022-07-27 | Testing device for electro-hydraulic actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221958961.XU CN218207318U (en) | 2022-07-27 | 2022-07-27 | Testing device for electro-hydraulic actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218207318U true CN218207318U (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221958961.XU Active CN218207318U (en) | 2022-07-27 | 2022-07-27 | Testing device for electro-hydraulic actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218207318U (en) |
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2022
- 2022-07-27 CN CN202221958961.XU patent/CN218207318U/en active Active
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