CN202348806U - proportional cartridge valve with variable flow gain - Google Patents
proportional cartridge valve with variable flow gain Download PDFInfo
- Publication number
- CN202348806U CN202348806U CN2011205044915U CN201120504491U CN202348806U CN 202348806 U CN202348806 U CN 202348806U CN 2011205044915 U CN2011205044915 U CN 2011205044915U CN 201120504491 U CN201120504491 U CN 201120504491U CN 202348806 U CN202348806 U CN 202348806U
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Abstract
The utility model discloses a proportional cartridge valve with a variable flow gain, which comprises a valve bush, a hollow valve core, a control cover plate, a valve deck, a displacement sensor and a pilot control valve, wherein the hollow valve core is provided with a damping hole. The proportional cartridge valve is characterized in that the lower part of the hollow valve core is loaded in the valve bush, the lower part of the hollow valve core and the valve bush are linearly sealed, 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 deck, the displacement sensor is arranged on the valve deck, and the pilot control valve is arranged on the side face of the control cover plate; a semicircular hole is formed on a bottom port of the valve core; and four symmetrical waist-shaped holes are formed on the valve bush. The proportional cartridge valve disclosed by the utility model has the advantages that: the valve is small in opening, small in flow gain and better in linearity, and can realize small-flow high-precision linearity control; and the flow fluctuation and pressure impact of the valve are small, therefore, the service life of the valve can be prolonged.
Description
Technical field
The utility model 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 purpose of the utility model is to provide a kind of 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 utility model 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 be realized 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.
The technological scheme of the utility model is following:
The utility model comprises valve pocket, has the hollow spool of damping hole, control cover plate, valve gap, displacement transducer and pilot-actuated valve; 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 utility model 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 the structural representation of the utility model;
Fig. 2 is the utility model spool bottom port structure enlarged view;
Fig. 3 is the utility model spool worm's eye view;
Fig. 4 is the utility model valve pocket sectional view.
Embodiment
In the ratio cartridge valve mechanism schematic 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.
The working method of the utility model 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 utility model 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 the unsteady flow flow gain characteristic and the through-flow smooth performance of the utility model, 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 |
|---|---|---|---|
| CN2011205044915U CN202348806U (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 |
|---|---|---|---|
| CN2011205044915U CN202348806U (en) | 2011-12-07 | 2011-12-07 | proportional cartridge valve with variable flow gain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348806U true CN202348806U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205044915U Expired - Fee Related CN202348806U (en) | 2011-12-07 | 2011-12-07 | proportional cartridge valve with variable flow gain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348806U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418721A (en) * | 2011-12-07 | 2012-04-18 | 燕山大学 | Proportional cartridge valve with variable flow gain |
| CN103775434A (en) * | 2013-12-31 | 2014-05-07 | 中南大学 | Cartridge valve model selection method for direction control in vibration environment |
| CN104196802A (en) * | 2014-09-06 | 2014-12-10 | 蚌埠液力机械有限公司 | Variable type control valve |
| CN107152428A (en) * | 2017-06-15 | 2017-09-12 | 上海诺玛液压系统有限公司 | A kind of highly integrated SERVO CONTROL ultrahigh pressure proportional inserted valve |
| CN108180299A (en) * | 2017-12-28 | 2018-06-19 | 邵立坤 | A kind of one-way flow valves |
| CN108757623A (en) * | 2018-08-20 | 2018-11-06 | 刘永 | Proportional throttle valve is led in a kind of stable type two |
| CN109268337A (en) * | 2018-12-04 | 2019-01-25 | 中联重科股份有限公司 | A kind of hydraulic valve and hydraulic system, engineering machinery |
-
2011
- 2011-12-07 CN CN2011205044915U patent/CN202348806U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418721A (en) * | 2011-12-07 | 2012-04-18 | 燕山大学 | Proportional cartridge valve with variable flow gain |
| CN103775434A (en) * | 2013-12-31 | 2014-05-07 | 中南大学 | Cartridge valve model selection method for direction control in vibration environment |
| CN103775434B (en) * | 2013-12-31 | 2017-01-18 | 中南大学 | Two-way cartridge valve model selection method for direction control in vibration environment |
| CN104196802A (en) * | 2014-09-06 | 2014-12-10 | 蚌埠液力机械有限公司 | Variable type control valve |
| CN107152428A (en) * | 2017-06-15 | 2017-09-12 | 上海诺玛液压系统有限公司 | A kind of highly integrated SERVO CONTROL ultrahigh pressure proportional inserted valve |
| CN107152428B (en) * | 2017-06-15 | 2019-04-09 | 上海诺玛液压系统有限公司 | A kind of highly integrated SERVO CONTROL ultrahigh pressure proportional inserted valve |
| CN108180299A (en) * | 2017-12-28 | 2018-06-19 | 邵立坤 | A kind of one-way flow valves |
| CN108180299B (en) * | 2017-12-28 | 2019-06-18 | 江苏金晟元特种阀门股份有限公司 | A kind of one-way flow valves |
| CN108757623A (en) * | 2018-08-20 | 2018-11-06 | 刘永 | Proportional throttle valve is led in a kind of stable type two |
| CN108757623B (en) * | 2018-08-20 | 2024-05-10 | 刘永 | Stable two-way proportional throttle valve |
| CN109268337A (en) * | 2018-12-04 | 2019-01-25 | 中联重科股份有限公司 | A kind of hydraulic valve and hydraulic system, engineering machinery |
| CN109268337B (en) * | 2018-12-04 | 2019-12-06 | 中联重科股份有限公司 | Hydraulic valve, hydraulic system and engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20141207 |
|
| EXPY | Termination of patent right or utility model |