CN203272289U - Electromagnetic unloading loop device - Google Patents
Electromagnetic unloading loop device Download PDFInfo
- Publication number
- CN203272289U CN203272289U CN 201320255103 CN201320255103U CN203272289U CN 203272289 U CN203272289 U CN 203272289U CN 201320255103 CN201320255103 CN 201320255103 CN 201320255103 U CN201320255103 U CN 201320255103U CN 203272289 U CN203272289 U CN 203272289U
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- valve
- directional control
- variable displacement
- pump
- displacement pump
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Abstract
The utility model provides an electromagnetic unloading loop device which comprises a variable pump, an electromagnetic reversing valve, a hydraulic cylinder, an electromagnetic valve and a sequence valve. The variable pump is connected with a left cavity of the hydraulic cylinder through a left connector of the electromagnetic valve, the variable pump is further communicated with a right cavity of the hydraulic cylinder through a right connector of the electromagnetic reversing valve, and the variable pump is respectively connected with the electromagnetic valve and the sequence valve. According to the structure, when a system only needs little power, a hydraulic pump can make an unloading loop run at a very low dropout voltage, therefore, system power and noise can be reduced, abrasion is little, and the service life of the hydraulic pump is prolonged.
Description
Technical field
The utility model is specifically related to electromagnetism relief circuit device.
Background technique
the function of relief circuit is in the situation that the hydraulic pump drive motor does not does not frequently open and close, that oil hydraulic pump is in the situation that power loss approaches zero the running, to reduce power loss, the heating of reduction system extends the life-span of oil hydraulic pump and motor, because the output power of oil hydraulic pump is the product of its flow and pressure, thereby, both are arbitrary is approximately zero, power loss namely is approximately zero, therefore the off-load of oil hydraulic pump has two kinds of flow off-load and pressure off-loads, the former uses variable displacement pump, pump is only leaked for compensation to turn round with minimum discharge, the method is fairly simple, but pump still is under high pressure conditions and moves, wear and tear more serious, the method of pressure off-load is that pump is being turned round near under zero-pressure, common pressure unloading way has the selector valve relief circuit, relief circuit with the pilot-type relief valve off-load, the two-way plug-in valve relief circuit.
Summary of the invention
Technical problem to be solved in the utility model is to provide electromagnetism relief circuit device, when system only needed a small amount of power, oil hydraulic pump can make relief circuit turn round under very low pressure reduction, can reduce system power and noise like this, wearing and tearing are few, extend the working life of oil hydraulic pump.
For solving above-mentioned existing technical problem, the utility model adopts following scheme: electromagnetism relief circuit device, comprise variable displacement pump, solenoid directional control valve, oil hydraulic cylinder, solenoid valve, sequence valve, described variable displacement pump is connected with oil hydraulic cylinder left chamber by the left connection mouth of solenoid directional control valve, variable displacement pump also is communicated with oil hydraulic cylinder right chamber by the right connection mouth of solenoid directional control valve, and described variable displacement pump is connected with solenoid valve, sequence valve respectively.
As preferably, described variable displacement pump is communicated with the first fuel tank by solenoid valve, and the fluid of this structure variable pump enters the first fuel tank by solenoid valve, and is easy to operate.
As preferably, described variable displacement pump also is communicated with the second fuel tank by sequence valve, and this structure variable pump also is communicated with the second fuel tank by sequence valve, and structure is more reasonable.
As preferably, described solenoid directional control valve is communicated with the 3rd fuel tank, and this structure solenoid directional control valve is communicated with the 3rd fuel tank, and fluid flows to the 3rd fuel tank by solenoid directional control valve, operates more convenient, rational in infrastructure.
As preferably, described solenoid directional control valve adopts three position four-way electromagnetic valve, and this structure solenoid directional control valve adopts three position four-way electromagnetic valve, further convenient operation, reliable and stable.
Beneficial effect:
The utility model adopts technique scheme that electromagnetism relief circuit device is provided, when system only needed a small amount of power, oil hydraulic pump can make relief circuit turn round under very low pressure reduction, can reduce system power and noise like this, wearing and tearing are few, extend the working life of oil hydraulic pump.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
as shown in Figure 1, electromagnetism relief circuit device, comprise variable displacement pump 1, solenoid directional control valve 2, oil hydraulic cylinder 3, solenoid valve 4, sequence valve 5, described variable displacement pump 1 is connected with oil hydraulic cylinder 3 left chamber by the left connection mouth of solenoid directional control valve 2, variable displacement pump 1 also is communicated with oil hydraulic cylinder 3 right chamber by the right connection mouth of solenoid directional control valve 2, described variable displacement pump 1 respectively with solenoid valve 4, sequence valve 5 connects, described variable displacement pump 1 is communicated with the first fuel tank 6 by solenoid valve 4, described variable displacement pump 1 also is communicated with the second fuel tank 7 by sequence valve 5, described solenoid directional control valve 2 is communicated with the 3rd fuel tank 8, described solenoid directional control valve 2 adopts three position four-way electromagnetic valve.
during real work, the fluid of this structure variable pump 1 enters the first fuel tank 6 by solenoid valve 4, easy to operate, this structure variable pump 1 also is communicated with the second fuel tank 7 by sequence valve 5, structure is more reasonable, this structure solenoid directional control valve 2 is communicated with the 3rd fuel tank 8, fluid flows to the 3rd fuel tank 8 by solenoid directional control valve 2, operate more convenient, rational in infrastructure, this structure solenoid directional control valve 2 adopts three position four-way electromagnetic valve, further convenient operation, reliable and stable, when the utility model only needs a small amount of power when system, oil hydraulic pump can make relief circuit turn round under very low pressure reduction, can reduce system power and noise like this, wearing and tearing are few, extend the working life of oil hydraulic pump.
Specific embodiment described herein is only to the explanation for example of the utility model spirit, the utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (5)
1. electromagnetism relief circuit device, it is characterized in that: comprise variable displacement pump (1), solenoid directional control valve (2), oil hydraulic cylinder (3), solenoid valve (4), sequence valve (5), described variable displacement pump (1) is connected with oil hydraulic cylinder (3) left chamber by the left connection mouth of solenoid directional control valve (2), variable displacement pump (1) also is communicated with oil hydraulic cylinder (3) right chamber by the right connection mouth of solenoid directional control valve (2), and described variable displacement pump (1) is connected with solenoid valve (4), sequence valve (5) respectively.
2. electromagnetism relief circuit device according to claim 1 is characterized in that: described variable displacement pump (1) is communicated with the first fuel tank (6) by solenoid valve (4).
3. electromagnetism relief circuit device according to claim 1 is characterized in that: described variable displacement pump (1) also is communicated with the second fuel tank (7) by sequence valve (5).
4. electromagnetism relief circuit device according to claim 1, it is characterized in that: described solenoid directional control valve (2) is communicated with the 3rd fuel tank (8).
5. electromagnetism relief circuit device according to claim 1, is characterized in that: described solenoid directional control valve (2) employing three position four-way electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320255103 CN203272289U (en) | 2013-05-09 | 2013-05-09 | Electromagnetic unloading loop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320255103 CN203272289U (en) | 2013-05-09 | 2013-05-09 | Electromagnetic unloading loop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203272289U true CN203272289U (en) | 2013-11-06 |
Family
ID=49502712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320255103 Expired - Fee Related CN203272289U (en) | 2013-05-09 | 2013-05-09 | Electromagnetic unloading loop device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203272289U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940595A (en) * | 2014-03-14 | 2014-07-23 | 杨卫中 | Service life test bed for valve electric device |
| CN104386618A (en) * | 2014-09-18 | 2015-03-04 | 芜湖高昌液压机电技术有限公司 | Pressure compensating unloading loop of shearing type lifting machine |
| CN104386615A (en) * | 2014-09-18 | 2015-03-04 | 芜湖高昌液压机电技术有限公司 | Composite cylinder speed reduction loop of lifting machine |
| CN106441855A (en) * | 2014-03-14 | 2017-02-22 | 杨卫中 | Testing system for valve electric device life with torque transmission screw rod and horizontal support rod |
| CN109435701A (en) * | 2018-10-24 | 2019-03-08 | 大乘汽车有限公司 | A kind of unloading device and its control method for parallel connection type hybrid power system |
-
2013
- 2013-05-09 CN CN 201320255103 patent/CN203272289U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940595A (en) * | 2014-03-14 | 2014-07-23 | 杨卫中 | Service life test bed for valve electric device |
| CN103940595B (en) * | 2014-03-14 | 2017-01-11 | 杨卫中 | Service life test bed for valve electric device |
| CN106441855A (en) * | 2014-03-14 | 2017-02-22 | 杨卫中 | Testing system for valve electric device life with torque transmission screw rod and horizontal support rod |
| CN106441855B (en) * | 2014-03-14 | 2018-08-17 | 杨卫中 | The pilot system in the electric device for valve service life with torque drive leading screw and triatic stay |
| CN104386618A (en) * | 2014-09-18 | 2015-03-04 | 芜湖高昌液压机电技术有限公司 | Pressure compensating unloading loop of shearing type lifting machine |
| CN104386615A (en) * | 2014-09-18 | 2015-03-04 | 芜湖高昌液压机电技术有限公司 | Composite cylinder speed reduction loop of lifting machine |
| CN109435701A (en) * | 2018-10-24 | 2019-03-08 | 大乘汽车有限公司 | A kind of unloading device and its control method for parallel connection type hybrid power system |
| CN109435701B (en) * | 2018-10-24 | 2022-02-11 | 大乘汽车有限公司 | Load relief device for parallel hybrid power system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20140509 |