CN203272289U - Electromagnetic unloading loop device - Google Patents

Electromagnetic unloading loop device Download PDF

Info

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
Authority
CN
China
Prior art keywords
valve
directional control
pump
variable displacement
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320255103
Other languages
Chinese (zh)
Inventor
邵谊增
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Business Technology Institute
Original Assignee
Zhejiang Business Technology Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Business Technology Institute filed Critical Zhejiang Business Technology Institute
Priority to CN 201320255103 priority Critical patent/CN203272289U/en
Application granted granted Critical
Publication of CN203272289U publication Critical patent/CN203272289U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Electromagnetism relief circuit device
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.
CN 201320255103 2013-05-09 2013-05-09 Electromagnetic unloading loop device Expired - Fee Related CN203272289U (en)

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)

* Cited by examiner, † Cited by third party
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
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
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
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

Cited By (7)

* Cited by examiner, † Cited by third party
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
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
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
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

Similar Documents

Publication Publication Date Title
CN203272289U (en) Electromagnetic unloading loop device
CN203272291U (en) Workpiece feeding rapid unloading loop
CN201581431U (en) Loader load sensitization hydraulic device
CN102673639B (en) Hydraulic steering control system and crane with system
EP2369067A3 (en) Negative control type hydraulic system
CN202833008U (en) Concrete pump and hydraulic system thereof
CN103085865A (en) Load sensitive turning hydraulic system of loading machine
CN104863914A (en) Electrohydraulic joint control flow collecting valve
CN202833434U (en) Hydraulic system and engineering machinery
CN103603840A (en) Integrated hydraulic valve group and hydraulic drive system and concrete pump
CN203743127U (en) Hydraulic system for engineering oil cylinder durability test
CN203384136U (en) Speed exchange circuit with parallel speed control valves
CN105090141A (en) Hydraulic variable control system and vehicle
CN202468560U (en) High-speed punching hydraulic loop of hydraulic punching machine
CN205154780U (en) Oil pump constant speed control system
CN204344557U (en) A kind of ultrahigh pressure pilot operated compound relief valve
CN103883571A (en) Electrohydraulic control multi-pump quantitive confluence hydraulic system for loading machines
CN203430877U (en) Three-level pressure control pump
CN102734241A (en) Opened and closed hydraulic system and engineering machinery
CN102661296A (en) Hydraulic system and engineering machinery vehicle
CN203214291U (en) Concrete pump truck and automatic reverse pump device thereof
CN203384138U (en) Speed exchange circuit with serially-connected speed control valves
CN206953495U (en) A kind of high response open mold hydraulic system
CN202883529U (en) Energy-saving device of hydraulic piston pump of filter press
CN202073856U (en) Hydraulic control system with multi-machine pump of rubber vulcanizing machine

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