CN103807245A - Electric proportional overflow cushion valve for engineering machines - Google Patents
Electric proportional overflow cushion valve for engineering machines Download PDFInfo
- Publication number
- CN103807245A CN103807245A CN201410026695.0A CN201410026695A CN103807245A CN 103807245 A CN103807245 A CN 103807245A CN 201410026695 A CN201410026695 A CN 201410026695A CN 103807245 A CN103807245 A CN 103807245A
- Authority
- CN
- China
- Prior art keywords
- valve
- proportional overflow
- electric proportional
- engineering machines
- cushion valve
- 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
Links
Images
Landscapes
- Details Of Valves (AREA)
Abstract
An electric proportional overflow cushion valve for engineering machines is characterized in that a decompression valve, a throttling hole and a proportional overflow valve are sequentially connected between an oil inlet and an oil outlet, and an oil output opening is formed in a channel between the decompression valve and the throttling hole. The electric proportional overflow cushion valve has the advantages of being easy to achieve, saving energy, and being suitable for a loader of various tonnages and other engineering machines.
Description
Technical field
The present invention relates to engineering mechanism hydraulic system technical field, particularly a kind of engineering machinery proportional overflow trimmer valve.
Background technique
The buffering of executive component is generally do not have or realize by the throttling on executive component oil inlet and oil return road now, not buffering, and executive component returns and is severely affected, and produces very large noise; Adopt throttling buffering, have the very large pressure loss, produce very large heat, not energy-conservation.
Summary of the invention
Object of the present invention is just to provide one can, in engineering machinery, as loader etc., make executive component in the process of rapid movement, have the effect of buffering, avoids producing noise, and also energy-conservation engineering machinery proportional overflow trimmer valve.
Technological scheme of the present invention is such: the present invention is connected with reduction valve, throttle orifice, electric proportional pressure control valve in turn between filler opening and oil outlet, and the channel setting between described reduction valve and throttle orifice has output oil port.
Technological scheme also comprises more specifically: described reduction valve is constant value type reduction valve.
Advantage of the present invention is to be easy to realize, and energy saving is suitable in the engineering machinery such as loader of various tonnages.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention.
Fig. 2 is that the present invention is applied to the application example in loader hydraulic system.
Embodiment
As shown in Figure 1, the present invention is connected with reduction valve 1, throttle orifice 2, electric proportional pressure control valve 3 in turn between oil inlet P and oil outlet T, channel setting between described reduction valve 1 and throttle orifice 2 has output oil port A, the present embodiment is that above-mentioned hydraulic element are made to electric proportional overflow trimmer valve B, and described reduction valve 1 is constant value type reduction valve; The pressure of electricity proportional pressure control valve 3 can be regulated by electric proportional valve, and the size of adjusting decides according to the electric current of input, guarantees the stationarity of outlet A when throttle orifice 2 is used for controlling electric proportional pressure control valve and works.
As shown in Figure 2, it is example explanation that the present invention is applied in loader hydraulic system, and hydraulic system comprises hydraulic oil container 8, working pump 9, electric proportional overflow trimmer valve piece B, pilot valve 4, rotary ink tank 5, boom cylinder 6, distributing valve 7.
Its working principle is:
Control distributing valve 7 with pilot valve 4, make 5 actions of boom cylinder 6 and rotary ink tank realize swing arm and promote, decline and float and decline and scraper bowl is received bucket and discharging.But above several actions all require velocity ratio very fast, operating efficiency is high, just inevitably run into some problems, in the time that swing arm promotes, drops to limit position and scraper bowl discharging or receives bucket to limit position, because excessive velocities can produce impact, very large to the impact of boom cylinder, rotary ink tank, complete machine oscillation is serious, and driver operation is very uncomfortable.In order to address this problem, at the correct position established angle displacement transducer of swing arm and rocking arm, so that respond in real time the position of equipment.When moved arm lifting, drop to and approach limit position and scraper bowl and receive bucket and be dumped into while approaching limit position, 2 angular displacement sensor difference output electrical signals are given electric proportional overflow trimmer valve piece B, make reducing of proportional overflow pressure response, that the pressure that enters pilot valve 4 reduces, and then the valve port opening of distributing valve 7 is turned down, reduce the flow system flow that removes boom cylinder 6 and bucket cylinder 5, reduce the speed of swing arm lifting, decline, scraper bowl receipts bucket and discharging, thereby play a kind of cushioning effect, reduce complete machine oscillation and the impact to two kinds of oil cylinders.
Technique scheme is not limited to fixed dilivery hydraulic system and also can be applicable to the variable system with load sensitive pump and load-sensitive distributing valve.
Claims (2)
1. an engineering machinery proportional overflow trimmer valve, it is characterized in that: between filler opening (P) and oil outlet (T), be connected with reduction valve (1), throttle orifice (2), electric proportional pressure control valve (3) in turn, the channel setting between described reduction valve (1) and throttle orifice (2) has output oil port (A).
2. engineering machinery proportional overflow trimmer valve according to claim 1, is characterized in that: described reduction valve (1) is constant value type reduction valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026695.0A CN103807245A (en) | 2014-01-21 | 2014-01-21 | Electric proportional overflow cushion valve for engineering machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410026695.0A CN103807245A (en) | 2014-01-21 | 2014-01-21 | Electric proportional overflow cushion valve for engineering machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103807245A true CN103807245A (en) | 2014-05-21 |
Family
ID=50704494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410026695.0A Pending CN103807245A (en) | 2014-01-21 | 2014-01-21 | Electric proportional overflow cushion valve for engineering machines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103807245A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895039A (en) * | 2017-02-23 | 2017-06-27 | 广西柳工机械股份有限公司 | Electric proportional control valve and hydraulic system of loading machine working device |
| CN109778931A (en) * | 2019-03-06 | 2019-05-21 | 广西柳工机械股份有限公司 | Loading machine shovels dress system, control method automatically |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2084708C1 (en) * | 1995-03-14 | 1997-07-20 | Производственно-коммерческое предприятие "Регитон" | Sectional hydraulic distributor |
| RU2177566C1 (en) * | 2000-07-27 | 2001-12-27 | Акинфиев Алексей Алексеевич | Regulating hydraulic apparatus |
| CN102155447A (en) * | 2011-03-15 | 2011-08-17 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and rotating buffer valve thereof |
| CN102730582A (en) * | 2012-06-20 | 2012-10-17 | 上海三一科技有限公司 | Hydraulic rotary system start-stop buffering device, and crane |
| CN202673817U (en) * | 2012-06-29 | 2013-01-16 | 益阳瑞克液压件制造有限公司 | High-efficiency energy-saving hydraulic system for petroleum snubbing device |
| CN202851491U (en) * | 2012-09-19 | 2013-04-03 | 浙江高宇液压机电有限公司 | Load-sensitive multi-way valve used in loader variable system |
| CN103062164A (en) * | 2013-01-09 | 2013-04-24 | 中联重科股份有限公司 | Overload protection debugging control method, overload protection debugging control device, overload protection debugging control system and engineering machine |
| CN103470565A (en) * | 2013-09-24 | 2013-12-25 | 徐州重型机械有限公司 | Rotary cushion valve and rotary system for crane |
-
2014
- 2014-01-21 CN CN201410026695.0A patent/CN103807245A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2084708C1 (en) * | 1995-03-14 | 1997-07-20 | Производственно-коммерческое предприятие "Регитон" | Sectional hydraulic distributor |
| RU2177566C1 (en) * | 2000-07-27 | 2001-12-27 | Акинфиев Алексей Алексеевич | Regulating hydraulic apparatus |
| CN102155447A (en) * | 2011-03-15 | 2011-08-17 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and rotating buffer valve thereof |
| CN102730582A (en) * | 2012-06-20 | 2012-10-17 | 上海三一科技有限公司 | Hydraulic rotary system start-stop buffering device, and crane |
| CN202673817U (en) * | 2012-06-29 | 2013-01-16 | 益阳瑞克液压件制造有限公司 | High-efficiency energy-saving hydraulic system for petroleum snubbing device |
| CN202851491U (en) * | 2012-09-19 | 2013-04-03 | 浙江高宇液压机电有限公司 | Load-sensitive multi-way valve used in loader variable system |
| CN103062164A (en) * | 2013-01-09 | 2013-04-24 | 中联重科股份有限公司 | Overload protection debugging control method, overload protection debugging control device, overload protection debugging control system and engineering machine |
| CN103470565A (en) * | 2013-09-24 | 2013-12-25 | 徐州重型机械有限公司 | Rotary cushion valve and rotary system for crane |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895039A (en) * | 2017-02-23 | 2017-06-27 | 广西柳工机械股份有限公司 | Electric proportional control valve and hydraulic system of loading machine working device |
| CN106895039B (en) * | 2017-02-23 | 2018-11-13 | 广西柳工机械股份有限公司 | Electric proportional control valve and hydraulic system of loading machine working device |
| CN109778931A (en) * | 2019-03-06 | 2019-05-21 | 广西柳工机械股份有限公司 | Loading machine shovels dress system, control method automatically |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103790874B (en) | Valveless Hydrauservo System and controlling method thereof | |
| CN102912823B (en) | Rotary energy saving system of excavator | |
| CN103807243B (en) | Engineering machinery ratio pressure-reducing cushioning valve | |
| US9920780B2 (en) | Slewing drive apparatus for construction machine | |
| CN203113416U (en) | High-precision hydraulic control system | |
| EP2947331B1 (en) | Hydraulic apparatus based on confluence control mode | |
| CN105715597A (en) | Constant-backpressure direct drive type electro hydraulic servo system and control method thereof | |
| CN103398038B (en) | Multifunctional three-way flow control valve and construction machinery hydraulic system | |
| CN103982475A (en) | Hydraulic control system for concrete spraying vehicle boom frame | |
| CN105544631A (en) | Control loop of hydraulic bucket working device | |
| CN203114764U (en) | Load-sensitive electro-hydraulic proportional multi-way valve | |
| CN104029721A (en) | Hydraulic steering device for loader | |
| CN105102732B (en) | The spool displacement changeable controller and control method of building machinery | |
| CN103807245A (en) | Electric proportional overflow cushion valve for engineering machines | |
| CN103671293B (en) | Floating weight of banbury mixer oil cylinder hydraulic control method and device | |
| CN205618450U (en) | Hydraulic system divides fender energy storage ware energy recuperation device | |
| CN204942135U (en) | The control gear of excavator hydraulic system | |
| CN205296270U (en) | Quick response excavator hydraulic system | |
| CN102864810B (en) | A kind of engineering machinery hydraulic energy saver and control method and excavator | |
| CN202544013U (en) | Excavator hydraulic system and excavator | |
| CN202732515U (en) | Flow control hydraulic system and engineering machine | |
| CN103016018A (en) | Closed energy-saving shield screw conveyor hydraulic system | |
| CN105351162A (en) | Fluid machine | |
| CN202296922U (en) | Crane variable-amplitude control valve and crane variable-amplitude hydraulic system | |
| CN105317763A (en) | Electro hydraulic servo system for high-frequency fine-blanking forming equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140521 |