CN102767206A - Valve outer flow regenerating unit of hydraulic excavator - Google Patents

Valve outer flow regenerating unit of hydraulic excavator Download PDF

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Publication number
CN102767206A
CN102767206A CN2012102701308A CN201210270130A CN102767206A CN 102767206 A CN102767206 A CN 102767206A CN 2012102701308 A CN2012102701308 A CN 2012102701308A CN 201210270130 A CN201210270130 A CN 201210270130A CN 102767206 A CN102767206 A CN 102767206A
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CN
China
Prior art keywords
valve
flow
way valve
way
oil
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.)
Pending
Application number
CN2012102701308A
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Chinese (zh)
Inventor
高春生
刘合涛
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.)
Xuzhou XCMG Excavator Machinery Co Ltd
Original Assignee
Xuzhou XCMG Excavator Machinery Co Ltd
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 Xuzhou XCMG Excavator Machinery Co Ltd filed Critical Xuzhou XCMG Excavator Machinery Co Ltd
Priority to CN2012102701308A priority Critical patent/CN102767206A/en
Publication of CN102767206A publication Critical patent/CN102767206A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a valve outer flow regenerating unit of a hydraulic excavator, and belongs to the field of hydraulic control systems. The valve outer flow regenerating unit comprises an oil circuit providing regenerated flow, an oil circuit needing the regenerated flow, a flow regenerating valve and a one-way valve bank; the flow regenerating valve comprises a two-position two-way hydraulic control reversing valve and a one-way valve; and the one-way valve bank comprises a one-way valve I and a one-way valve II, and set pressures of the one-way valve I and the one-way valve II are different. Regeneration of flow outside a main control valve of the hydraulic excavator is controlled, phenomena of 'evacuation', 'crawling' and the like due to the fact that flow supply of an oil inlet side of a cylinder is insufficient are avoided, the working efficiency of the excavator is increased, and action coordination of the excavator is improved. Besides, the displacement and the overall dimension of a pump can be reduced, the cost of the pump is reduced, and assembly is facilitated.

Description

A kind of hydraulic crawler excavator valve external flux regenerating unit
Technical field
The present invention specifically is a kind of hydraulic crawler excavator valve external flux regenerating unit, belongs to the hydraulic control system field.
Background technology
The suffered load of hydraulic digger operating device is to change constantly, and the load that changes constantly acts on hydraulic jack, and this makes hydraulic jack will bear various complex working conditions.Wherein, when the gravity of piston rod and load during as power accelerated motion, the flow undersupply can appear in oil cylinder oil-feed side, causes phenomenons such as " inhaling empty ", " creeping ", and these phenomenons can be brought problems such as the low and coordination property difference of operating efficiency.
Summary of the invention
In order to solve the problem that exists in the above-mentioned technology; The invention discloses a kind of hydraulic crawler excavator valve external flux regenerating unit; Avoid oil cylinder oil-feed side the flow undersupply to occur, cause phenomenons such as " inhaling empty ", " creeping ", improve the operating efficiency and the coordination property of machine simultaneously.
In order to achieve the above object; The present invention provides following technical scheme: this hydraulic crawler excavator valve external flux regenerating unit; Comprise the oil circuit that regenerant flow is provided, the oil circuit that needs regenerant flow, flow regeneration valve and one way valve group, the flow regeneration valve comprises 2/2-way pilot operated directional control valve and one way valve, and the 2/2-way pilot operated directional control valve is connected with one way valve; The oil-in B of flow regeneration valve is communicated with the oil circuit that regenerant flow is provided; Oil-out A is communicated with the oil circuit that needs regenerant flow, and the one way valve group comprises one way valve I and the one way valve II that setting pressure is different, and the series connection of one way valve group inserts and provides in the oil circuit of regenerant flow;
Further, the pressure of one way valve I is 0.05 ~ 0.1MPa;
Further, the pressure of one way valve II is 5~7MPa.
The invention has the beneficial effects as follows: this apparatus structure is compact; Realized the outer flow regeneration control of hydraulic crawler excavator main control valve; Cause " inhaling empty " and phenomenons such as " creeping " when having avoided the flow undersupply occurring because of oil cylinder oil-feed side; Improve the excavator operating efficiency, improved excavator coordination property, fully satisfied the working condition requirement of hydraulic crawler excavator.Simultaneously can reduce pump delivery and appearance and size, so not only reduce the cost of pump but also brought facility to assembling.
Description of drawings
Fig. 1 is a hydraulic principle sketch map of the present invention;
Fig. 2 for the A of flow regeneration valve of the present invention to structural representation;
Fig. 3 for the B of flow regeneration valve of the present invention to structural representation;
Fig. 4 is the overall structure sketch map of one way valve group among the present invention.
Among the figure: 1. hydraulic oil container, 3. one way valve group 4. provides the oil circuit of regenerant flow, 5. hydraulic jack; 6. load 7. needs the oil circuit of regenerant flow, 8. flow regeneration valve, 9. main valve; 11. the 2/2-way pilot operated directional control valve, 13. one way valves, 14. one way valve I, 16. one way valve II.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4; This hydraulic crawler excavator valve external flux regenerating unit; Be made up of the oil circuit that regenerant flow is provided 4, the oil circuit 7 that needs regenerant flow, flow regeneration valve 8 and one way valve group 3, said flow regeneration valve 8 comprises 2/2-way pilot operated directional control valve 11 and one way valve 13, and 2/2-way pilot operated directional control valve 11 is connected with one way valve 13; The oil-in B of flow regeneration valve 8 is communicated with the oil circuit that regenerant flow is provided 4; Oil-out A is communicated with the oil circuit that needs regenerant flow 7, and said one way valve group 3 comprises different one way valve I of setting pressure 14 and one way valve II 16, and 3 series connection of one way valve group insert in the oil circuit 4 that regenerant flow is provided certain back pressure is provided.
The pressure of said one way valve I 14 is set at 0.05MPa; 14 need of this one way valve I provide a very little opening pressure to get final product; When hydraulic jack 5 loculus oil-feeds; Fluid can enter into hydraulic jack 5 loculuses through less opening pressure, and main effect is to utilize one way valve I 14 reverse by functions, and the fluid oil return in the oil circuit 4 of regenerant flow is provided when preventing flow regeneration.
The pressure of one way valve II 16 is set at 5MPa, and pass test data draws, if one way valve II 16 set pressures are too little, can not get suitable back pressure, and fluid can not enter into the flow regeneration valve to carry out flow regeneration and get back to fuel tank, and problem can not get solving; If one way valve II 16 set pressures are excessive, can cause back pressure excessive, thereby waste power has increased oil consumption.
The oil-in B of flow regeneration valve 8 is communicated with the oil circuit that regenerant flow is provided 4, and oil-out A is communicated with the oil circuit that needs regenerant flow 7.The 3 series connection accesses of one way valve group are provided in the oil circuit 4 of regenerant flow; When main valve 9 is operated in right position; Hydraulic jack 5 piston rods move downward (being the oil-feed lower end loculus oil return of big chamber, hydraulic jack 5 upper ends), because itself there are action of gravity in hydraulic jack 5 piston rods and load 6, load 6 can be quickened to move downward with piston rod; Flow undersupply phenomenon can appear in big chamber, hydraulic jack 5 upper ends; At this moment, the pressure that the guide controls system can be communicated with flow regeneration valve 8Pi mouth, makes flow regeneration valve 8 be operated in right position (being that the B mouth is communicated with the A mouth); Simultaneously; 3 meetings of one way valve group provide a back pressure to make on the oil circuit that regenerant flow is provided 4 and get back to fuel tank 1 from the flow of hydraulic jack 5 loculuses outflow without main valve 9, but through the big chamber of inflow-rate of water turbine regeneration valve 8 supplies to hydraulic jack 5, avoid big chamber appearance " suction is empty " phenomenon of hydraulic jack 5.
When main valve 9 is operated in position, a left side; Hydraulic jack 5 piston rods move upward (being the big chamber oil returns in hydraulic jack 5 lower end loculus oil-feeds upper end); At this moment, flow regeneration valve 8Pi mouth does not have pressure, and flow regeneration valve 8 is operated in position, a left side (being that B mouth and A mouth break off); The position, a left side of the high-voltage oil liquid process main valve 9 of pump discharge and the loculus that one way valve group 3 enters into hydraulic jack 5, the fluid that comes out in the big chamber of oil cylinder is directly got back to hydraulic oil container 1 through left of main valve 9.

Claims (3)

1. hydraulic crawler excavator valve external flux regenerating unit; Comprise the oil circuit (4) that regenerant flow is provided, the oil circuit (7) that needs regenerant flow, flow regeneration valve (8) and one way valve group (3); It is characterized in that; Flow regeneration valve (8) comprises 2/2-way pilot operated directional control valve (11) and one way valve (13); 2/2-way pilot operated directional control valve (11) is connected with one way valve (13), and the oil-in B of flow regeneration valve (8) is communicated with the oil circuit that regenerant flow is provided (4), and oil-out A is communicated with the oil circuit that needs regenerant flow (7); One way valve group (3) comprises one way valve I (14) and the one way valve II (16) that setting pressure is different, and one way valve group (3) series connection inserts and provides in the oil circuit (4) of regenerant flow.
2. a kind of hydraulic crawler excavator valve external flux regenerating unit according to claim 1 is characterized in that the pressure of said one way valve I (14) is 0.05 ~ 0.1MPa.
3. a kind of hydraulic crawler excavator valve external flux regenerating unit according to claim 1 is characterized in that the pressure of said one way valve II (16) is 5~7MPa.
CN2012102701308A 2012-07-31 2012-07-31 Valve outer flow regenerating unit of hydraulic excavator Pending CN102767206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102701308A CN102767206A (en) 2012-07-31 2012-07-31 Valve outer flow regenerating unit of hydraulic excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102701308A CN102767206A (en) 2012-07-31 2012-07-31 Valve outer flow regenerating unit of hydraulic excavator

Publications (1)

Publication Number Publication Date
CN102767206A true CN102767206A (en) 2012-11-07

Family

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CN2012102701308A Pending CN102767206A (en) 2012-07-31 2012-07-31 Valve outer flow regenerating unit of hydraulic excavator

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CN (1) CN102767206A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604109A (en) * 2016-03-22 2016-05-25 潍柴动力股份有限公司 Hydraulic regeneration system of movable arm of excavator
CN107013526A (en) * 2017-05-22 2017-08-04 株洲天合天颐环境设备有限公司 Filter press hydraulic control circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05302604A (en) * 1992-04-23 1993-11-16 Yutani Heavy Ind Ltd Generative oil pressure circuit for hydraulic cylinder of construction machine
CN201406700Y (en) * 2009-04-30 2010-02-17 徐州徐工挖掘机械有限公司 Integrated low pressure diverter valve block
CN201915433U (en) * 2010-12-09 2011-08-03 宁波弗莱格液压有限公司 Hydraulic regeneration system for diggers
CN202767158U (en) * 2012-07-31 2013-03-06 徐州徐工挖掘机械有限公司 Hydraulic excavator flow out of valve regenerating device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05302604A (en) * 1992-04-23 1993-11-16 Yutani Heavy Ind Ltd Generative oil pressure circuit for hydraulic cylinder of construction machine
CN201406700Y (en) * 2009-04-30 2010-02-17 徐州徐工挖掘机械有限公司 Integrated low pressure diverter valve block
CN201915433U (en) * 2010-12-09 2011-08-03 宁波弗莱格液压有限公司 Hydraulic regeneration system for diggers
CN202767158U (en) * 2012-07-31 2013-03-06 徐州徐工挖掘机械有限公司 Hydraulic excavator flow out of valve regenerating device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
成凯等: "挖掘机液压系统建模与仿真", 《工程机械》, vol. 41, 31 August 2010 (2010-08-31), pages 29 - 33 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604109A (en) * 2016-03-22 2016-05-25 潍柴动力股份有限公司 Hydraulic regeneration system of movable arm of excavator
CN107013526A (en) * 2017-05-22 2017-08-04 株洲天合天颐环境设备有限公司 Filter press hydraulic control circuit
CN107013526B (en) * 2017-05-22 2019-09-17 株洲天合天颐环境设备有限公司 Filter press hydraulic control circuit

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Application publication date: 20121107