CN109667812B - Proportional valve and servo valve test bench - Google Patents
Proportional valve and servo valve test bench Download PDFInfo
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- CN109667812B CN109667812B CN201910128395.6A CN201910128395A CN109667812B CN 109667812 B CN109667812 B CN 109667812B CN 201910128395 A CN201910128395 A CN 201910128395A CN 109667812 B CN109667812 B CN 109667812B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract
The invention relates to a proportional valve and servo valve test bench, which comprises an oil tank and a tested valve group, wherein an oil outlet pipe is arranged on the oil tank, an oil pump, an oil filter, a pressure gauge and an energy accumulator are sequentially arranged on the oil outlet pipe from the oil tank to the tested valve group, the tested valve group comprises a flow measuring device, a first three-way ball valve, a second three-way ball valve and a two-way ball valve, three interfaces of the first three-way ball valve are respectively connected with an oil outlet end of the oil outlet pipe, one end of the flow measuring device and an oil inlet end of an oil return pipe, three interfaces of the second three-way ball valve are respectively connected with the oil outlet end of the oil outlet pipe, the other end of the flow measuring device and the oil inlet end of the oil return pipe, a connecting point of the first three-way ball valve and the oil return pipe is arranged above the two-way ball valve, the power of the motor is greatly reduced, and the problem of equipment noise is thoroughly solved.
Description
Technical Field
The invention relates to the technical field of automatic detection, in particular to a proportional valve and servo valve test bench.
Background
The hydraulic proportional valve and the servo valve are used as key elements for hydraulic automation and intellectualization, are more and more widely applied in the industrial field, and how to effectively and quickly test the proportional valve and the servo valve, how to save energy, improve the production efficiency and reduce the cost is particularly important and urgent.
The traditional test method of the proportional valve and the servo valve test bench has the following problems: the energy consumption is serious, the noise is high, and the heat generation is serious.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a proportional valve and a servo valve test bench.
The purpose of the invention is realized by the following technical scheme: the device comprises an oil tank and a tested valve group, wherein an oil outlet pipe is arranged on the oil tank, the oil outlet end of the oil outlet pipe is connected with the oil inlet end of the tested valve group, an oil pump, an oil filter, a pressure gauge and an energy accumulator are sequentially arranged on the oil outlet pipe from the oil tank to the tested valve group, the oil pump is in driving connection with a speed regulating motor through a bell jar coupling, the tested valve group comprises a flow measuring device, a first three-way ball valve, a second three-way ball valve and a two-way ball valve, the flow measuring device is provided with a displacement sensor, three interfaces of the first three-way ball valve are respectively connected with the oil outlet end of the oil outlet pipe, one end of the flow measuring device and the oil inlet end of an oil return pipe, three interfaces of the second three-way ball valve are respectively connected with the oil outlet end of the oil outlet pipe, the other end of the flow measuring device and the oil inlet end of the oil, the first three-way ball valve and the oil return pipe are connected above the two-way ball valve, and the oil outlet end of the oil return pipe is connected with the oil tank.
In a preferred embodiment, the oil tank is provided with an oil suction filter connected to the oil suction port of the oil pump.
In a preferred embodiment, the oil outlet end of the oil filter is provided with a one-way valve.
In a preferred embodiment, the bottom of the energy accumulator is connected with the oil outlet pipe through an on-off valve, and a first pressure sensor is arranged on the energy accumulator.
In the preferred embodiment, be equipped with the second pressure sensor on the play oil end of oil pipe, the kneck that first tee bend ball valve and oil return pipe link to each other is equipped with the third pressure sensor, the kneck that second tee bend ball valve and oil return pipe link to each other is equipped with the fourth pressure sensor.
In a preferred embodiment, a connection part of the oil return pipe and the oil tank is provided with an oil return filter.
In a preferred embodiment, an air filter is provided on the oil tank.
In a preferred embodiment, a liquid level temperature test instrument is arranged on the oil tank.
In a preferred embodiment, an overflow valve is arranged at the joint of the pressure gauge and the oil outlet pipe, and the overflow valve is connected with the oil outlet pipe and the oil return pipe; the overflow valve is connected with an electromagnetic valve in parallel, one end of the electromagnetic valve is connected with the oil inlet end of the overflow valve, and the other end of the electromagnetic valve is connected with an oil return pipe.
The invention has the beneficial effects that:
1. the majority of hydraulic oil in the test process is provided by the energy accumulator, the power of the motor is greatly reduced, and the problem of equipment noise is thoroughly solved;
2. a new flow test loop and a new flow test device are designed, and the flow and leakage flow tests in two directions of the tested valve can be completed only by one test oil cylinder;
3. the pressure regulation of the tested valve realizes closed-loop control through the speed regulating pump motor set and the pressure sensor, thereby avoiding overflow loss and greatly reducing system heating.
Drawings
The invention is explained in further detail below with reference to the drawing.
Fig. 1 is a schematic structural diagram of a proportional valve and servo valve test bench according to an embodiment of the present invention.
In the figure:
1. an oil tank; 2. an oil outlet pipe; 3. an oil return pipe; 4. an oil suction filter; 5. an oil pump; 6. a speed-regulating motor; 7. an oil filter; 8. a one-way valve; 9. a pressure gauge; 10. an accumulator; 11. an on-off valve; 12. a first pressure sensor; 13. a second pressure sensor; 14. a first three-way ball valve; 15. a third pressure sensor; 16. a flow measuring device; 17. a displacement sensor; 18. a second three-way ball valve; 19. a fourth pressure sensor; 20. a two-way ball valve; 21. an overflow valve; 22. an electromagnetic valve; 23. an oil return filter; 24. an air cleaner; 25. a liquid level temperature test instrument; 26. a bell coupling.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1, the proportional valve and servo valve test bench according to the embodiment of the present invention includes an oil tank 1 and a tested valve group, wherein an oil outlet pipe 2 is disposed on the oil tank 1, an oil outlet end of the oil outlet pipe 2 is connected to an oil inlet end of the tested valve group, the oil outlet pipe 2 is sequentially provided with an oil pump 5, an oil filter 7, a pressure gauge 9 and an energy accumulator 10 from the oil tank 1 to the tested valve group, the oil pump 5 is used for providing power for oil outlet of the oil tank 1, and can adopt a low noise meshing internal gear pump to reduce noise, the oil filter 7 is used for filtering impurities in the oil outlet, and the pressure gauge 9 is used for measuring and displaying pressure of; the bottom of the energy accumulator 10 is connected with the oil outlet pipe 2 through the on-off valve 11, the energy accumulator 10 is provided with the first pressure sensor 12, the energy accumulator 10 is used for carrying out secondary pressurization on outlet oil, most of hydraulic oil in the testing process is provided by the energy accumulator 10, the power of the motor is greatly reduced, and the problem of equipment noise is thoroughly solved. The accumulator 10 is fed oil to accumulate energy for use when the tested valve bank is not tested. The oil pump 5 is connected with the speed regulating motor 6 through a bell coupling 26 in a driving way.
The valve port pressure regulation of the tested valve adopts a closed-loop control mode, the speed regulating motor 6+ the oil pump + the pressure sensor form a pressure closed-loop control assembly, so that how much hydraulic oil is needed for testing, the overflow loss of the pressure regulation of the conventional pressure valve is avoided, the testing system almost has no heat generation amount, and the use of a cooler is avoided. The tested valve group comprises a flow measuring device 16, a first three-way ball valve 14, a second three-way ball valve 18 and a two-way ball valve 20, a displacement sensor 17 is arranged on the flow measuring device 16, the flow measuring device 16 is a hollow pipe body and used for oil to pass through, and the displacement value of oil measured by the displacement sensor 17 is multiplied by the cross-sectional area of the flow measuring device 16 to obtain the flow passing through the flow measuring device 16. The three interfaces of the first three-way ball valve 14 are respectively connected with the oil outlet end of the oil outlet pipe 2, one end of the flow measuring device 16 and the oil inlet end of the oil return pipe 3, the three interfaces of the second three-way ball valve 18 are respectively connected with the oil outlet end of the oil outlet pipe 2, the other end of the flow measuring device 16 and the oil inlet end of the oil return pipe 3, and the directions of the flow to be tested and the different flows and pressures of the two ports of the flow measuring device 16 can be controlled by the first three-way ball valve 14 and the second three-way ball. The first three-way ball valve 14 is adjusted to be communicated with the oil outlet pipe 2 and the flow measuring device 16, and the second three-way ball valve 18 is adjusted to be communicated with the flow measuring device 16 and the oil return pipe 3, so that the flow of one port of the flow measuring device 16 can be tested; the second three-way ball valve 18 is adjusted to communicate the oil outlet pipe 2 and the flow measuring device 16, and the first three-way ball valve 14 is communicated with the flow measuring device 16 and the oil return pipe 3, so that the flow of the other port of the flow measuring device 16 can be measured. The two-way ball valve 20 is arranged on the oil return pipe 3 and is arranged between a connection point of the first three-way ball valve 14 and the oil return pipe 3 and a connection point of the second three-way ball valve 18 and the oil return pipe 3, the connection point of the first three-way ball valve 14 and the oil return pipe 3 is arranged above the two-way ball valve 20, the oil outlet end of the oil return pipe 3 is connected with the oil tank 1, and oil in the oil tank 1 enters the flow measuring device 16 after coming out through the oil outlet pipe 2 and then returns to the oil tank 1 through the oil return pipe 3.
An oil suction and filtration device 4 connected with an oil suction port of an oil pump 5 is arranged in the oil tank 1, impurities in the discharged oil are filtered, and the oil is doubly filtered together with an oil filtration device 7.
The oil outlet end of the oil filter 7 is provided with a one-way valve 8, so that the oil outlet can only come out from the oil outlet pipe 2, and the oil outlet is prevented from flowing back to the oil return tank 1.
The oil outlet end of the oil outlet pipe 2 is provided with a second pressure sensor 13 for measuring the pressure of the oil entering the tested valve bank; a third pressure sensor 15 is arranged at the interface of the first three-way ball valve 14 connected with the oil return pipe 3 and used for measuring the pressure of oil returning to the oil return pipe 3 from the first three-way ball valve 14; a fourth pressure sensor 19 is arranged at the interface of the second three-way ball valve 18 connected with the oil return pipe 3 and used for measuring the pressure of the oil returning to the oil return pipe 3 from the second three-way ball valve 18.
And an oil return filter 23 is arranged at the joint of the oil return pipe 3 and the oil tank 1 and used for filtering impurities in return oil.
The oil tank 1 is provided with an air filter 24, the main components of the air filter 24 are a vent cap and an oiling filter screen, the vent cap is used for filtering gas and keeping the pressure in the oil tank 1 working at atmospheric pressure, and the oiling filter screen is used for ensuring the cleanness of oiling.
Be equipped with liquid level temperature test instrument 26 on the oil tank 1, ensure that oil tank 1 liquid level oil temperature is normal, play the effect of reporting to the police, when reaching the limit, report to the police, let operating personnel pay attention to the heat dissipation and refuel.
An overflow valve 21 is arranged at the joint of the pressure gauge 9 and the oil outlet pipe 2 and is connected with the oil outlet pipe 2 and the oil return pipe 3; the overflow valve 21 is a hydraulic pressure control valve, mainly plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in hydraulic equipment, and when the pressure on the oil outlet pipe 2 is overlarge, oil flows from the overflow valve 21 to the oil return pipe 3 to ensure the pressure stabilization of the oil pipe; the overflow valve 21 is connected with a solenoid valve 22 in parallel, one end of the solenoid valve 22 is connected with the oil inlet end of the overflow valve 21, the other end of the solenoid valve 22 is connected with the oil return pipe 3, the solenoid valve 22 plays a role of a safety valve, and when the pressure on the oil outlet pipe 2 is too large and the pressure cannot be relieved by the overflow valve 21 alone, the solenoid valve 22 is opened to drain oil simultaneously.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a proportional valve and servo valve testboard which characterized in that: the device comprises an oil tank and a tested valve group, wherein an oil outlet pipe is arranged on the oil tank, the oil outlet end of the oil outlet pipe is connected with the oil inlet end of the tested valve group, an oil pump, an oil filter, a pressure gauge and an energy accumulator are sequentially arranged on the oil outlet pipe from the oil tank to the tested valve group, the oil pump is in driving connection with a speed regulating motor through a bell jar coupling, the tested valve group comprises a flow measuring device, a first three-way ball valve, a second three-way ball valve and a two-way ball valve, the flow measuring device is provided with a displacement sensor, three interfaces of the first three-way ball valve are respectively connected with the oil outlet end of the oil outlet pipe, one end of the flow measuring device and the oil inlet end of an oil return pipe, three interfaces of the second three-way ball valve are respectively connected with the oil outlet end of the oil outlet pipe, the other end of the flow measuring device and the oil inlet end of the oil, the first three-way ball valve and the oil return pipe are connected above the two-way ball valve, and the oil outlet end of the oil return pipe is connected with the oil tank.
2. The proportional valve and servo valve test stand of claim 1, wherein: and an oil suction filter connected with an oil suction port of the oil pump is arranged in the oil tank.
3. The proportional valve and servo valve test stand of claim 1, wherein: the oil outlet end of the oil filter is provided with a one-way valve.
4. The proportional valve and servo valve test stand of claim 1, wherein: the bottom of the energy accumulator is connected with the oil outlet pipe through an on-off valve, and a first pressure sensor is arranged on the energy accumulator.
5. The proportional valve and servo valve test stand of claim 1, wherein: the oil outlet end of the oil outlet pipe is provided with a second pressure sensor, a third pressure sensor is arranged at the joint of the first three-way ball valve and the oil return pipe, and a fourth pressure sensor is arranged at the joint of the second three-way ball valve and the oil return pipe.
6. The proportional valve and servo valve test stand of claim 1, wherein: and an oil return filter is arranged at the joint of the oil return pipe and the oil tank.
7. The proportional valve and servo valve test stand of claim 1, wherein: and an air filter is arranged on the oil tank.
8. The proportional valve and servo valve test stand of claim 1, wherein: and a liquid level temperature test instrument is arranged on the oil tank.
9. The proportional valve and servo valve test stand of claim 1, wherein: an overflow valve is arranged at the joint of the pressure gauge and the oil outlet pipe and is connected with the oil outlet pipe and the oil return pipe; the overflow valve is connected with an electromagnetic valve in parallel, one end of the electromagnetic valve is connected with the oil inlet end of the overflow valve, and the other end of the electromagnetic valve is connected with an oil return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910128395.6A CN109667812B (en) | 2019-02-21 | 2019-02-21 | Proportional valve and servo valve test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910128395.6A CN109667812B (en) | 2019-02-21 | 2019-02-21 | Proportional valve and servo valve test bench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109667812A CN109667812A (en) | 2019-04-23 |
| CN109667812B true CN109667812B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910128395.6A Active CN109667812B (en) | 2019-02-21 | 2019-02-21 | Proportional valve and servo valve test bench |
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| Country | Link |
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| CN (1) | CN109667812B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201636132U (en) * | 2010-04-02 | 2010-11-17 | 山东电力研究院 | Hydraulic device for servo valve testing system |
| CN105587714A (en) * | 2016-03-23 | 2016-05-18 | 海航高科秦皇岛科技有限公司 | Hydraulic test system for servo valve |
| CN205937309U (en) * | 2016-08-25 | 2017-02-08 | 山西东润精益电力液压控制有限公司 | Hydraulic servo valve test bench hydraulic system |
-
2019
- 2019-02-21 CN CN201910128395.6A patent/CN109667812B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201636132U (en) * | 2010-04-02 | 2010-11-17 | 山东电力研究院 | Hydraulic device for servo valve testing system |
| CN105587714A (en) * | 2016-03-23 | 2016-05-18 | 海航高科秦皇岛科技有限公司 | Hydraulic test system for servo valve |
| CN205937309U (en) * | 2016-08-25 | 2017-02-08 | 山西东润精益电力液压控制有限公司 | Hydraulic servo valve test bench hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN109667812A (en) | 2019-04-23 |
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