CN102418721A - Proportional cartridge valve with variable flow gain - Google Patents
Proportional cartridge valve with variable flow gain Download PDFInfo
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- CN102418721A CN102418721A CN2011104026825A CN201110402682A CN102418721A CN 102418721 A CN102418721 A CN 102418721A CN 2011104026825 A CN2011104026825 A CN 2011104026825A CN 201110402682 A CN201110402682 A CN 201110402682A CN 102418721 A CN102418721 A CN 102418721A
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Abstract
The invention discloses a proportional cartridge valve with variable flow gain, which comprises a valve sleeve, a hollow valve core with a damping hole, a control cover plate, a valve cover, a displacement transducer and a pilot control valve, and is characterized in that: the lower part of the hollow valve core is arranged in the valve sleeve and is linearly sealed with the valve sleeve; the upper part of the hollow valve core is matched with the control cover plate; the upper end of the control cover plate is connected with the valve cover; the displacement transducer is arranged on the valve cover; the pilot control valve is arranged on a side face of the control cover plate; a semicircular hole is machined on a port at the bottom of the valve core; and four symmetrical waist-shaped holes are machined on the valve sleeve. The invention has the advantages that: the proportional cartridge valve has small valve opening, low flow gain and high linearity, and high-precision linear control at low flow can be realized; the valve has large valve opening, high flow gain and high linearity, and high-precision linear control at high flow can be realized; and due to low flow fluctuation and low pressure shock of the valve, the service life of the valve can be prolonged.
Description
Technical field
The present invention relates to a kind of cartridge valve, particularly a kind of electro-hydraulic proportion cartridge valve.
Background technique
Along with the development of industrial technology, large hydraulic press its domestic application such as Pressesforging, injection machine, die casting machine are more and more, the low characteristics of speed when speed was fast, heavily loaded when this type machinery had zero load, and therefore the control unit for speed control system requires very high.The proportional throttle valve of plug-in mounting structure has several times of through-current capabilities to common proportional velocity regulating valve, and simple in structure, cost is low, static and dynamic performance good and reliability is high, stationarity and the stepless speed regulation that realizes system is had great importance.
Existing electro-hydraulic proportion cartridge valve working principle mainly contains displacement-force feedback, displacement-flow feedback, three grades of control types and displacement-electricity and feeds back four kinds.Displacement-force feedback type utilizes the self-regulation hydraulic Design to realize flow control; It is simple in structure, reliable, cost is low; But its control accuracy receives the influence of non-linear, the spool of amplifier and proportion electro-magnet and foozle, the frictional force of spring, the factors such as power of surging bigger, and dynamic response is lower; Hydraulic pressure feedback control valve element position is adopted in displacement-flow feedback-type, and cost is low, but its characteristic receives the influence of factors such as leakage of oil temperature, steady-state fluid force, matching gap bigger, generally only is applied to low pressure; Three grades of control types also are based on displacement-force feedback control principle; Increase an amplifier stage and guaranteed higher speed of response and big traffic requirement; But steady-state characteristic receives the influence of proportion electro-magnet displacement force characteristic, frictional force, the factors such as power of surging equally, and complex structure.Displacement-electric feedback-type has been introduced electric feedback closed loop control; As long as the precision of displacement transducer is enough high; The stable state accuracy of valve just can reach quite high level; Than the electro-hydraulic proportion cartridge valve of above type, control accuracy and speed of response are all better, have therefore all obtained at aspects such as continuous mill, hydraulic press, tank, warships using widely.
Yet the release off-load that existing above-mentioned valve element is applied to forging hydraulic press is controlled, and exist the shortcoming of general character: pressure and flow attack are very big in the stress-relief process, flow control inaccuracy during small flow.Its main cause is in the forge oil press release off-load control; Require flow control valve when little opening degree, can realize the accurate control of small flow; To accomplish the steady reduction of main clutch release slave cylinder pressure; When main clutch release slave cylinder pressure is reduced to certain numerical value, just require flow control valve to have very big oil filling capacity, discharge to accomplish fluid a large amount of in the press master clutch release slave cylinder; Valve element for big oil filling capacity; Flow gain in the small flow zone is difficult to guarantee linear; And poor stability; Cause valve poor controllability when little opening, make valve element and the very big pressure punching press of front and back pipeline generation in winner's clutch release slave cylinder stress-relief process, shortened the working life of oil hydraulic press and valve.
Summary of the invention
The object of the present invention is to provide and a kind ofly can accurately control the ratio cartridge valve that small flow can accurately be controlled big flow, flowed fluctuation is little, compression shock is little unsteady flow flow gain again.The present invention in the opening amount of valve hour because the special construction of restriction makes that flow gain is little and have the better linearity degree, can realize the highi degree of accuracy linearity control of small flow; When the opening amount of valve was big, flow gain was big and have the better linearity degree, can realize the highi degree of accuracy linearity control of big flow.
Technological scheme of the present invention is following:
The present invention includes valve pocket, have hollow spool, control cover plate, valve gap, displacement transducer and the pilot-actuated valve of damping hole; Wherein pack in the valve pocket in the hollow spool bottom; Hollow spool bottom and valve pocket linear sealing, hollow spool top cooperates with control cover plate, and the control cover plate upper end connects valve gap; Installation position displacement sensor on valve gap is installed pilot-actuated valve in the control cover plate side; Be processed with semi-circular hole on the spool bottom port; On valve pocket, be processed with the waist shaped hole of four symmetries.
The present invention compared with prior art has following advantage:
1, changeable flow gain: the opening amount of valve hour, flow gain is little and have the better linearity degree, can realize the highi degree of accuracy linearity control of small flow; When the opening amount of valve was big, flow gain was big and have the better linearity degree, can realize the highi degree of accuracy linearity control of big flow.Applicable to forge oil press master clutch release slave cylinder oil extraction hydraulic system, that can realize main clutch release slave cylinder steadily unloads pressure-controlled and precisely flow control.
2, improve flow field characteristic; Reduce the pressure loss: waist shaped hole has better oil filling capacity with respect to circular port; Reduced the compression shock and the velocity jump of near the fluid of this valve valve port like this, reduced the whirlpool zone between valve pocket and the valve piece, thereby reduced the energy loss of fluid in flow process; Reduced noise, can effectively alleviate the impact in the forge oil press master clutch release slave cylinder release off-load process and prolong working life of valve.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a spool bottom port structure enlarged view of the present invention;
Fig. 3 is a spool worm's eye view of the present invention;
Fig. 4 is a valve pocket sectional view of the present invention.
Embodiment
In the ratio cartridge valve structural representation of unsteady flow flow gain shown in Figure 1; Hollow spool 2 bottoms in valve pocket 1, hollow spool bottom and valve pocket linear sealing, hollow spool top cooperates with control cover plate 3; This control cover plate upper end connects valve gap 4; This valve gap is threaded the hole, and displacement transducer 5 is fixedly mounted on the tapped hole of valve gap, and pilot-actuated valve 6 is installed in the control cover plate side; Be processed with semi-circular hole 7 on the spool bottom port, make spool bottom lower end mouth become restriction; On valve pocket, be provided with the waist shaped hole 8 of four symmetries.
Working method of the present invention is: fluid flows into from the spool lower end mouth, through four waist-shaped holes outflows of valve pocket; The spool lower end is connected with spool epicoele 9; When spool was positioned at bottom, this cartridge valve was in closed condition; When spool moves up, valve is opened gradually; When the opening amount of cartridge valve hour because the throttling characteristics of semi-circular groove rise the rating curve near linear through this cartridge valve gently; Flow gain is little and have a better linearity degree; Can realize the highi degree of accuracy linearity control of small flow, when the opening amount of cartridge valve was big, flow gain was big and have a better linearity degree; Can realize the highi degree of accuracy linearity control of big flow, thereby realize the unsteady flow flow gain characteristic of this cartridge valve; The waist shaped hole of four symmetries of processing on the valve pocket; Waist shaped hole has the better oil filling capacity and the less pressure loss with respect to circular port; Reduce the compression shock and the velocity jump of near the fluid of cartridge valve valve port like this, reduced the energy loss of fluid in flow process; The displacement of spool is controlled by pilot-actuated valve; The guide controls fluid and flows in two closed areas that spool, control cover plate and valve pocket form through control cover plate from pilot-actuated valve, and the pressure reduction through two closed areas control fluid promotes spool and moves up and down; Displacement transducer detects the displacement of spool in real time.
With respect to common ratio cartridge valve; The present invention can make valve system when little opening amount; Flow gain is little and have a better linearity degree, and valve is when big opening amount, and flow gain is big and have a better linearity degree; Applicable to the work characteristics of forge oil press master clutch release slave cylinder oil extraction hydraulic system, that can realize main clutch release slave cylinder steadily unloads pressure-controlled and precisely flow control.Based on unsteady flow flow gain characteristic of the present invention and through-flow smooth performance, be applied to forge oil press master clutch release slave cylinder oil extraction hydraulic system, can guarantee that compression shock is little in the main clutch release slave cylinder release off-load process, flow control is precisely reliable.
Claims (1)
1. the ratio cartridge valve of a unsteady flow flow gain; Comprise valve pocket, have hollow spool, control cover plate, valve gap, displacement transducer and the pilot-actuated valve of damping hole, it is characterized in that: pack in the valve pocket in the hollow spool bottom, hollow spool bottom and valve pocket linear sealing; Hollow spool top cooperates with control cover plate; The control cover plate upper end connects valve gap, and installation position displacement sensor on valve gap is installed pilot-actuated valve in the control cover plate side; Be processed with semi-circular hole on the spool bottom port; On valve pocket, be processed with the waist shaped hole of four symmetries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104026825A CN102418721A (en) | 2011-12-07 | 2011-12-07 | Proportional cartridge valve with variable flow gain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104026825A CN102418721A (en) | 2011-12-07 | 2011-12-07 | Proportional cartridge valve with variable flow gain |
Publications (1)
| Publication Number | Publication Date |
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| CN102418721A true CN102418721A (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104026825A Pending CN102418721A (en) | 2011-12-07 | 2011-12-07 | Proportional cartridge valve with variable flow gain |
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| CN (1) | CN102418721A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927074A (en) * | 2012-11-22 | 2013-02-13 | 兰州理工大学 | Anti-cavitation high frequency response and high flow proportional cartridge valve |
| CN102927070A (en) * | 2012-10-31 | 2013-02-13 | 燕山大学 | Large-diameter proportional water valve for heavy equipment |
| CN103867747A (en) * | 2014-01-23 | 2014-06-18 | 福州大学 | Multistage flow gain two-way proportional cartridge valve |
| CN104454733A (en) * | 2014-12-01 | 2015-03-25 | 上海立新液压有限公司 | Two-way plug-in type proportional throttle valve |
| CN104481949A (en) * | 2014-11-27 | 2015-04-01 | 上海立新液压有限公司 | Plug-in proportional throttle valve |
| CN106678105A (en) * | 2016-12-15 | 2017-05-17 | 中国航空工业集团公司西安飞机设计研究所 | Variable-gain valve |
| CN106855070A (en) * | 2016-12-19 | 2017-06-16 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN107165877A (en) * | 2017-06-14 | 2017-09-15 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN110617243A (en) * | 2018-06-20 | 2019-12-27 | 罗伯特·博世有限公司 | Pre-controlled hydraulic directional plug-in valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4936339A (en) * | 1989-07-14 | 1990-06-26 | Bennett Barry D | Cartridge-type check valve |
| CN201209679Y (en) * | 2008-04-18 | 2009-03-18 | 山东泰丰液压设备有限公司 | Proportional guide servo control fully-active throttle cartridge valve |
| CN102162476A (en) * | 2011-06-02 | 2011-08-24 | 山东泰丰液压股份有限公司 | High-flow hydraulic feedback pilot control plug-type proportion throttle valve system |
| CN201972985U (en) * | 2011-02-22 | 2011-09-14 | 宁波铝台精机有限公司 | Opening-closing bilateral control cartridge valve |
| CN202348806U (en) * | 2011-12-07 | 2012-07-25 | 燕山大学 | proportional cartridge valve with variable flow gain |
-
2011
- 2011-12-07 CN CN2011104026825A patent/CN102418721A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4936339A (en) * | 1989-07-14 | 1990-06-26 | Bennett Barry D | Cartridge-type check valve |
| CN201209679Y (en) * | 2008-04-18 | 2009-03-18 | 山东泰丰液压设备有限公司 | Proportional guide servo control fully-active throttle cartridge valve |
| CN201972985U (en) * | 2011-02-22 | 2011-09-14 | 宁波铝台精机有限公司 | Opening-closing bilateral control cartridge valve |
| CN102162476A (en) * | 2011-06-02 | 2011-08-24 | 山东泰丰液压股份有限公司 | High-flow hydraulic feedback pilot control plug-type proportion throttle valve system |
| CN202348806U (en) * | 2011-12-07 | 2012-07-25 | 燕山大学 | proportional cartridge valve with variable flow gain |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927070A (en) * | 2012-10-31 | 2013-02-13 | 燕山大学 | Large-diameter proportional water valve for heavy equipment |
| CN102927074B (en) * | 2012-11-22 | 2016-12-21 | 兰州理工大学 | Anti-cavitation high frequency sound big flow proportional inserted valve |
| CN102927074A (en) * | 2012-11-22 | 2013-02-13 | 兰州理工大学 | Anti-cavitation high frequency response and high flow proportional cartridge valve |
| CN103867747A (en) * | 2014-01-23 | 2014-06-18 | 福州大学 | Multistage flow gain two-way proportional cartridge valve |
| CN103867747B (en) * | 2014-01-23 | 2016-01-06 | 福州大学 | A kind of two-way proportional cartridge valve of multilevel flow flow gain |
| CN104481949A (en) * | 2014-11-27 | 2015-04-01 | 上海立新液压有限公司 | Plug-in proportional throttle valve |
| CN104454733A (en) * | 2014-12-01 | 2015-03-25 | 上海立新液压有限公司 | Two-way plug-in type proportional throttle valve |
| CN106678105A (en) * | 2016-12-15 | 2017-05-17 | 中国航空工业集团公司西安飞机设计研究所 | Variable-gain valve |
| CN106678105B (en) * | 2016-12-15 | 2018-07-24 | 中国航空工业集团公司西安飞机设计研究所 | A kind of variable-gain valve |
| CN106855070A (en) * | 2016-12-19 | 2017-06-16 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN106855070B (en) * | 2016-12-19 | 2018-07-31 | 武汉船用机械有限责任公司 | A kind of proportional flow inserted valve and its control method |
| CN107165877A (en) * | 2017-06-14 | 2017-09-15 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN107165877B (en) * | 2017-06-14 | 2018-07-27 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN110617243A (en) * | 2018-06-20 | 2019-12-27 | 罗伯特·博世有限公司 | Pre-controlled hydraulic directional plug-in valve |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120418 |