CN201281052Y - Proportional displacement controlling device for variable displacement pump - Google Patents
Proportional displacement controlling device for variable displacement pump Download PDFInfo
- Publication number
- CN201281052Y CN201281052Y CNU200820218249XU CN200820218249U CN201281052Y CN 201281052 Y CN201281052 Y CN 201281052Y CN U200820218249X U CNU200820218249X U CN U200820218249XU CN 200820218249 U CN200820218249 U CN 200820218249U CN 201281052 Y CN201281052 Y CN 201281052Y
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- pump
- variable displacement
- displacement pump
- explosion
- pressure
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Abstract
The utility model relates to a proportional displacement control technology used for a variable pump by an explosion-proof electric proportion valve, in particular to a proportional displacement control device used for the variable pump. Being used in a closed type hydraulic system of a coal mine underground vehicle, the proportional displacement control device solves the problem that the variable pump used for the closed type hydraulic system for walking of the coal mine underground vehicle is single. The variable pump, a hydraulic control three-position four-way servo valve and an explosion-proof proportion valve are arranged at the proportional displacement control device; the variable pump is connected with the hydraulic control three-position four-way servo valve, and the explosion-proof electric proportion valve is arranged at the control port position of the hydraulic control three-position four-way servo valve. A pressure sensor and a rotating speed sensor are arranged in the proportional displacement control device; the pump displacement can be regulated in a stepless manner in each direction of liquid flow and is related to the input speed of the pump as well as the system pressure. The swash plate angle of the pump is decreased along with the increasing of the system pressure; when the rotating speed of an engine is reduced, the pressure-related pump stroke and the pilot pressure are reduced, thus realizing the function of power limiting and preventing the speed of the engine from being reduced.
Description
Technical field
The utility model relates to the ratio discharge capacity control technique that explosion-proof electric proportional valve is used for variable displacement pump, is specially a kind of device that is used for the ratio discharge capacity control of variable displacement pump, is used for the closed type hydraulic system of colliery underground vehicle.
Background technique
At present, because the used variable displacement pump of the closed type hydraulic system that is used to walk of home and abroad colliery underground vehicle, great majority are the product of external certain company, and product is more single, goes into technical monopoly.And adopt explosion-proof electric proportional valve to be used for the ratio discharge capacity control system of variable displacement pump; can realize this function equally; automaticity is higher; realized that pump delivery is relevant with the speed of a motor vehicle (throttle); realized the function of automatic driving; motor can be realized the power protective function, and can reduce rate of fault greatly.
The model utility content
The purpose of this utility model is to provide a kind of device that is used for the ratio discharge capacity control system of variable displacement pump, solved the single problem of the used variable displacement pump product of closed type hydraulic system that the colliery underground vehicle is used to walk, add explosion-proof Proportional valve and sensor, improved automaticity, can limit engine power, reach energy-saving effect.
The technical solution of the utility model is:
A kind of device that is used for the ratio discharge capacity control of variable displacement pump, this device is provided with variable displacement pump, hydraulic control 3-position 4-way servovalve, explosion-proof Proportional valve, variable displacement pump links to each other with hydraulic control 3-position 4-way servovalve, is provided with explosion-proof electric proportional valve in control port place of hydraulic control 3-position 4-way servovalve.
Described variable displacement pump links to each other with motor, and motor is connected with speed probe.
In the oil hydraulic circuit that this device forms, pressure transducer is set.
Described pressure transducer is arranged at the outlet port of variable displacement pump.
The beneficial effects of the utility model are:
1, in the utility model explosion-proof electric proportional valve is used for the ratio discharge capacity control of variable displacement pump, the displacement size of variable displacement pump and the input signal of explosion-proof Proportional valve are in proportion, and can control by controller, and automaticity is higher.
2, in the utility model, add pressure transducer and speed probe, but the variable pump delivery is in the equal step-less adjustment of all directions of liquid stream, make the displacement size of variable displacement pump also relevant with system's rotating speed with system pressure, by program control, can realize Power Limitation preferably, prevent that motor is excessive and flame-out because of load, and realize that automatically the speed of a motor vehicle is relevant with the throttle size motor.The swash plate angle of the utility model variable displacement pump raises with system pressure and reduces, when engine speed reduces, and the stroke by reducing pressure-dependent variable displacement pump and reduce pilot pressure, and then reach the function of Power Limitation, prevent engine stall.
Description of drawings
Fig. 1 is the utility model hydraulic schematic diagram.
Among the figure, 1 explosion-proof electric proportional valve I; 2 explosion-proof electric proportional valve II; 3 hydraulic control 3-position 4-way servovalves; 4 pressure transducer I; 5 variable displacement pumps; 6 speed probes; 7 motors; 8 pressure transducer II.
Embodiment
As shown in Figure 1, the utility model is used for the device of the ratio discharge capacity control system of variable displacement pump, mainly comprise: explosion-proof Proportional valve I1, explosion-proof electric proportional valve II2, hydraulic control 3-position 4-way servovalve 3, pressure transducer I4, variable displacement pump 5, speed probe 6, motor 7, pressure transducer II8 etc., variable displacement pump 5 links to each other with hydraulic control 3-position 4-way servovalve 3, control port place that is used for the hydraulic control 3-position 4-way servovalve 3 of discharge capacity control at variable displacement pump 5 is provided with two explosion-proof electric proportional valves (explosion-proof Proportional valve I1, explosion-proof electric proportional valve II2), control the openings of sizes of hydraulic control 3-position 4-way servovalve 3 with the outlet pressure of two explosion-proof electric proportional valves, come the swash plate pivot angle of controlled variable pump 5, and then the displacement size of control pump.The outlet pressure of explosion-proof Proportional valve I1, explosion-proof electric proportional valve II2 is directly proportional with its input signal size again, and promptly the pump delivery size is directly proportional with the input signal of Proportional valve.
The utility model utilizes the discharge capacity of external pressure SC sigmal control variable displacement pump 5, and the external pressure signal comes from the outlet pressure of explosion-proof Proportional valve I1, explosion-proof electric proportional valve II2, pump delivery when two explosion-proof electric proportional valves are controlled vehicle respectively and moved forward and backward.
The utility model motor 7 links to each other with variable displacement pump 5, speed probe 6 respectively, and be provided with speed probe 6 in the system and be used for the rotating speed of real-time detection of engine 7, according to the engine power curve, the power of motor in the time of can drawing a certain rotating speed.Hydraulic system walking loop is provided with two pressure transducers (pressure transducer I4 and pressure transducer II8), two pressure transducers are located at two outlet A mouths, B mouth place (the closed circuit both sides) of variable displacement pump 5 respectively, be used for the pressure of real-time testing pump outlet, and then detect in real time and advance and the oil pressure of system during rollback.Thereby, make the size of variable displacement pump 5 also relevant with rotating speed and pressure, by the discharge capacity that computer program comes controlled variable pump 5, the function that reaches the power protection and drive automatically.
The result shows, the utility model is used for explosion-proof electric proportional valve the ratio discharge capacity control of variable displacement pump, the displacement size of variable displacement pump and the input signal of explosion-proof Proportional valve are in proportion, add pressure transducer and speed probe, make the displacement size of variable displacement pump also relevant, by program control with system pressure and rotating speed, can realize Power Limitation preferably to motor, prevent that motor is excessive and flame-out because of load, and realize that automatically the speed of a motor vehicle is relevant with the throttle size, realize the function of driving automatically.
Claims (4)
1, a kind of device that is used for the ratio discharge capacity control of variable displacement pump, it is characterized in that: this device is provided with variable displacement pump, hydraulic control 3-position 4-way servovalve, explosion-proof Proportional valve, variable displacement pump links to each other with hydraulic control 3-position 4-way servovalve, is provided with explosion-proof electric proportional valve in control port place of hydraulic control 3-position 4-way servovalve.
2, according to the described device that is used for the ratio discharge capacity control of variable displacement pump of claim 1, it is characterized in that: described variable displacement pump links to each other with motor, and motor is connected with speed probe.
3, according to the described device that is used for the ratio discharge capacity control of variable displacement pump of claim 1, it is characterized in that: in the oil hydraulic circuit that this device forms, pressure transducer is set.
4, according to the described device that is used for the ratio discharge capacity control of variable displacement pump of claim 3, it is characterized in that: described pressure transducer is arranged at the outlet port of variable displacement pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820218249XU CN201281052Y (en) | 2008-09-27 | 2008-09-27 | Proportional displacement controlling device for variable displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820218249XU CN201281052Y (en) | 2008-09-27 | 2008-09-27 | Proportional displacement controlling device for variable displacement pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281052Y true CN201281052Y (en) | 2009-07-29 |
Family
ID=40927927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820218249XU Expired - Fee Related CN201281052Y (en) | 2008-09-27 | 2008-09-27 | Proportional displacement controlling device for variable displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281052Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410267A (en) * | 2011-11-03 | 2012-04-11 | 徐州雷曼机械科技有限公司 | Synchronous control device of revolving speed of hydraulic walking mechanism engine and discharge of main pump |
| CN102753837A (en) * | 2009-12-11 | 2012-10-24 | 卡特彼勒公司 | Control system for swashplate pump |
| CN104192739A (en) * | 2014-09-09 | 2014-12-10 | 徐州重型机械有限公司 | Rotary system and crane |
| CN104405707A (en) * | 2014-10-21 | 2015-03-11 | 恒天创丰重工有限公司 | Multi-pump hydraulic system and power control method thereof |
| CN114909359A (en) * | 2022-07-14 | 2022-08-16 | 湖南创远高新机械有限责任公司 | Closed hydraulic system and major diameter raise boring machine who uses thereof |
| WO2022206957A1 (en) * | 2021-04-02 | 2022-10-06 | 燕山大学 | Hydraulic active suspension flow control system |
-
2008
- 2008-09-27 CN CNU200820218249XU patent/CN201281052Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102753837A (en) * | 2009-12-11 | 2012-10-24 | 卡特彼勒公司 | Control system for swashplate pump |
| CN102753837B (en) * | 2009-12-11 | 2015-04-08 | 卡特彼勒公司 | Control system for swashplate pump |
| CN102410267A (en) * | 2011-11-03 | 2012-04-11 | 徐州雷曼机械科技有限公司 | Synchronous control device of revolving speed of hydraulic walking mechanism engine and discharge of main pump |
| CN104192739A (en) * | 2014-09-09 | 2014-12-10 | 徐州重型机械有限公司 | Rotary system and crane |
| CN104192739B (en) * | 2014-09-09 | 2016-03-30 | 徐州重型机械有限公司 | Rotary system and hoisting crane |
| CN104405707A (en) * | 2014-10-21 | 2015-03-11 | 恒天创丰重工有限公司 | Multi-pump hydraulic system and power control method thereof |
| CN104405707B (en) * | 2014-10-21 | 2016-06-01 | 恒天创丰重工有限公司 | A kind of split-pump hydraulic system and Poewr control method thereof |
| WO2022206957A1 (en) * | 2021-04-02 | 2022-10-06 | 燕山大学 | Hydraulic active suspension flow control system |
| US11813914B2 (en) | 2021-04-02 | 2023-11-14 | Yanshan University | Hydraulic active suspension flow control system |
| CN114909359A (en) * | 2022-07-14 | 2022-08-16 | 湖南创远高新机械有限责任公司 | Closed hydraulic system and major diameter raise boring machine who uses thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20140927 |
|
| EXPY | Termination of patent right or utility model |