CN104235450B - Pressure closed loop controls digital integration direct-acting type proportional overflow valve - Google Patents
Pressure closed loop controls digital integration direct-acting type proportional overflow valve Download PDFInfo
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- CN104235450B CN104235450B CN201410414735.9A CN201410414735A CN104235450B CN 104235450 B CN104235450 B CN 104235450B CN 201410414735 A CN201410414735 A CN 201410414735A CN 104235450 B CN104235450 B CN 104235450B
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- pressure
- closed loop
- magnet
- spool
- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses pressure closed loop and control digital integration direct-acting type proportional overflow valve, including valve body, proportion electro-magnet, pressure transducer and pressure closed loop control set of digits accepted way of doing sth amplifier, the left and right sides of valve body is separately installed with proportion electro-magnet and pressure transducer, pressure closed loop is controlled set of digits accepted way of doing sth amplifier and is connected with pressure transducer by signal conductor, proportion electro-magnet front end is provided with push rod, push rod acts on spool, back-moving spring it is provided with between spool and valve seat, spool and back-moving spring are placed in fairlead, fairlead is arranged on valve seat and coordinates with spool, valve seat front aperture connects with pressure transducer, body base has pressure oil port and oil return opening, pressure oil port communicates with valve seat front aperture, oil return opening communicates with the oil duct in back-moving spring and proportion electro-magnet respectively.Making that product work ring stable, highly sensitive, stagnant is little, dynamic quality is high, reliability is high, back-moving spring shields, it is possible to decrease valve pressure unloading during zero signal current.
Description
Technical field
The present invention relates to a kind of overflow valve, particularly relate to a kind of pressure closed loop and control digital integration direct-acting type proportional overflow valve.
Background technology
Common direct-acting type proportional overflow valve adoption rate solenoid actuated, the regulation pressure of its valve is affected bigger by overflow variable quantity and temperature, and also sluggish by proportion electro-magnet and amplifier temperature drift affects, and makes valve override pressure relatively big, sluggish big, less stable.This makes the Performance And Reliability of proportional pressure control valve not reach high-pressure and high-precision application requirement.
Therefore, for solving the problems referred to above, a kind of new technical scheme of special offer.
Summary of the invention
The present invention provides a kind of override pressure little, and sluggish little, stability is high, and the pressure closed loop that dynamic quality is good controls digital integration direct-acting type proportional overflow valve.
The technical solution used in the present invention is:
nullPressure closed loop controls digital integration direct-acting type proportional overflow valve，Including spool、Valve seat、Valve body、Proportion electro-magnet、Pressure transducer and pressure closed loop control set of digits accepted way of doing sth amplifier，The left and right sides of described valve body is separately installed with proportion electro-magnet and pressure transducer，Described pressure closed loop controls set of digits accepted way of doing sth amplifier and is fixed on proportion electro-magnet，Described pressure closed loop is controlled set of digits accepted way of doing sth amplifier and is connected with pressure transducer by signal conductor，Described proportion electro-magnet front end is provided with push rod，Described push rod acts on spool，It is provided with back-moving spring between described spool and valve seat，Described spool and back-moving spring are placed in fairlead，Described fairlead is arranged on valve seat and coordinates with spool，Described valve seat front aperture connects with pressure transducer，Described body base has pressure oil port and oil return opening，Described pressure oil port communicates with valve seat front aperture，Described oil return opening communicates with the oil duct in back-moving spring and proportion electro-magnet respectively.
Described spool is poppet valve core.
Described pressure closed loop controls set of digits accepted way of doing sth amplifier side and is provided with communication interface, and opposite side is provided with seven core sockets.
The invention has the beneficial effects as follows: the design of installed surface conformance with standard, digital amplifier integrative collocation, compact overall structure; applied by pressure closed loop control principle; modularized design is combined; make that product work ring stable, highly sensitive, stagnant is little, dynamic quality is high, reliability is high; back-moving spring shields, it is possible to decrease valve pressure unloading during zero signal current.
The pressure closed loop of the present invention controls digital integration direct-acting type proportional overflow valve, thrust and spring force, pressure transducer feedback signal that its proportion electro-magnet produces are relevant, proportion electro-magnet generation thrust, on poppet valve core, is balanced with oil liquid pressure by valve seat circular hole area；When forming overflow annular opening effect between poppet valve core and valve seat, the spillway discharge of its valve opening limits hydraulic coupling and keeps not raising effect, but, poppet valve core openings of sizes is by interference effects such as oil temperatures, the change making spillway discharge causes bigger pressure divergence, therefore, the various interference factors causing pressure divergence, fed back by pressure transducer and revise in time, reach to reduce the effect of override pressure, pressure closed loop arranges PID Controller in controlling set of digits accepted way of doing sth amplifier, it is ensured that the degree of regulation state of Closed-loop pressure control system.
Accompanying drawing explanation
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the upward view of Fig. 1.
Wherein: 1, proportion electro-magnet, 2, push rod, 3 spools, 4, fairlead, 5, back-moving spring, 6, valve seat, 7, valve body, 8, pressure transducer, 9, signal conductor, 10, seven core socket, 11, communication interface, 12, pressure closed loop control set of digits accepted way of doing sth amplifier, 13, front aperture, 14, pressure oil-in, 15, oil return opening, 16, oil duct.
Detailed description of the invention
In order to deepen the understanding of the present invention, being described in further detail the present invention below in conjunction with embodiment and accompanying drawing, this embodiment is only used for explaining the present invention, is not intended that the restriction to protection scope of the present invention.
nullAs depicted in figs. 1 and 2，The pressure closed loop of the present invention controls digital integration direct-acting type proportional overflow valve，Including spool 3、Valve seat 6、Valve body 7、Proportion electro-magnet 1、Pressure transducer 8 and pressure closed loop control set of digits accepted way of doing sth amplifier 12，Pressure closed loop controls set of digits accepted way of doing sth amplifier 12 side and is provided with communication interface 11，Opposite side is provided with seven core sockets 10，Spool 3 is poppet valve core，The left and right sides of valve body 7 is separately installed with proportion electro-magnet 1 and pressure transducer 8，Pressure closed loop controls set of digits accepted way of doing sth amplifier 12 and is fixed on proportion electro-magnet 1，The push rod 2 of proportion electro-magnet 1 acts on valve seat 6 axis，Spool 3 is made to insert valve seat 6，Pressure closed loop is controlled set of digits accepted way of doing sth amplifier 12 and is connected with pressure transducer 8 by signal conductor 9，Proportion electro-magnet 1 front end is provided with push rod 2，Push rod 2 acts on spool 3，It is provided with back-moving spring 5 between spool 3 and valve seat 6 to shield，Valve pressure unloading during zero signal current can be reduced，Spool 3 and back-moving spring 5 are placed in fairlead 4，Fairlead 4 is arranged on valve seat 3 and coordinates with spool 3，Valve seat 3 front aperture 13 connects with pressure transducer 8，Pressure oil port 14 and oil return opening 15 is had bottom valve body 7，Pressure oil port 14 communicates with valve seat 3 front aperture 13，Oil return opening 15 communicates with the oil duct 16 in back-moving spring 5 and proportion electro-magnet 1 respectively，Installed surface conformance with standard designs、Digital amplifier integrative collocation、Compact overall structure，Applied by pressure closed loop control principle，Modularized design is combined，Make product work stable、Highly sensitive、Stagnant ring is little、Dynamic quality is high、Reliability is high.
The principle of the present invention:
When controlling electric current input proportion electro-magnet 1, the push rod 2 of proportion electro-magnet 1 exports electromagnetic push, compression reseting spring 5, the signal power output produced by proportion electro-magnet 1 acts on poppet valve core 3, poppet valve core 3 presses to valve seat 6, and poppet valve core 3 and valve seat 6 are from compared with the pressure of pressure oil port P of front aperture 13, when hydraulic coupling is more than proportion electro-magnet thrust, opening amount occurs between poppet valve core 3 and valve seat 6, produces spillway discharge；Owing to opening amount varies less, under the influence of ignoring hydraulic power, when homeostasis, proportion electro-magnet 1 power output is directly proportional to the oil pressure of poppet valve core 3 front end, therefore, is directly proportional to the signal code of input proportion electro-magnet 1.
But, along with excess flow change causes hydraulic power to affect, oil liquid temperature change causes oil viscosity size impact, and the drift impact of the lagging characteristics of proportion electro-magnet own, amplifier temperature, these impacts cause proportional pressure control valve setting-pressure accuracy poor, or proportion electro-magnet is when high voltage adjusting power, resistance increase can be risen along with temperature and occur electromagnetic push to decline phenomenon.Therefore, use pressure transducer to monitor proportional pressure control valve level pressure value at any time, and pressure divergence feedback amplifier at any time is carried out Closed-loop pressure control.Owing to amplifier internal digital PID regulator is powerful, proportional pressure control valve level pressure high-precision requirement can be realized completely.
When the present invention works, valve is equivalent to change the handle of common Presure-adjusting Spring of Overflow Valve into proportion electro-magnet, acts directly on poppet valve core at electromagnetic push, if input control signal is zero, electromagnetic push disappears, the off-load immediately of pressure oil port P pressure；If Pressure behaviour Spline smoothing, damping hole is set in oil return inlet T, between poppet valve core and guiding valve pocket, forms dynamic antivibration effect, beneficially valve job stability.
The above, be only presently preferred embodiments of the present invention, is not the restriction that the present invention makees any other form, and any amendment made according to the technical spirit of the present invention or equivalent variations, still fall within scope of the present invention.
Claims (3)
- null1. pressure closed loop controls digital integration direct-acting type proportional overflow valve，It is characterized in that: include spool、Valve seat、Valve body、Proportion electro-magnet、Pressure transducer and pressure closed loop control set of digits accepted way of doing sth amplifier，The left and right sides of described valve body is separately installed with proportion electro-magnet and pressure transducer，Described pressure closed loop controls set of digits accepted way of doing sth amplifier and is fixed on proportion electro-magnet，Described pressure closed loop is controlled set of digits accepted way of doing sth amplifier and is connected with pressure transducer by signal conductor，Described proportion electro-magnet front end is provided with push rod，Described push rod acts on spool，It is provided with back-moving spring between described spool and valve seat，Described spool and back-moving spring are placed in fairlead，Described fairlead is arranged on valve seat and coordinates with spool，Described valve seat front aperture connects with pressure transducer，Described body base has pressure oil port and oil return opening，Described pressure oil port communicates with valve seat front aperture，Described oil return opening communicates with the oil duct in back-moving spring and proportion electro-magnet respectively.
- Pressure closed loop the most according to claim 1 controls digital integration direct-acting type proportional overflow valve, it is characterised in that: described spool is poppet valve core.
- Pressure closed loop the most according to claim 1 controls digital integration direct-acting type proportional overflow valve, it is characterised in that: described pressure closed loop controls set of digits accepted way of doing sth amplifier side and is provided with communication interface, and opposite side is provided with seven core sockets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414735.9A CN104235450B (en) | 2014-08-22 | 2014-08-22 | Pressure closed loop controls digital integration direct-acting type proportional overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410414735.9A CN104235450B (en) | 2014-08-22 | 2014-08-22 | Pressure closed loop controls digital integration direct-acting type proportional overflow valve |
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| CN104235450A CN104235450A (en) | 2014-12-24 |
| CN104235450B true CN104235450B (en) | 2016-08-24 |
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| CN201410414735.9A Active CN104235450B (en) | 2014-08-22 | 2014-08-22 | Pressure closed loop controls digital integration direct-acting type proportional overflow valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105570226B (en) * | 2016-03-15 | 2017-12-05 | 海门市油威力液压工业有限责任公司 | Digital voice coil motor controls servo valve |
| CN107327591B (en) * | 2017-08-02 | 2023-08-18 | 油威力液压科技股份有限公司 | High-pressure-resistant proportional servo valve with bidirectional proportional electromagnet driven double-spring structure |
| CN108873953B (en) * | 2018-08-28 | 2021-09-07 | 北京控制工程研究所 | High-precision pressure control method and system based on electromagnetic proportional valve |
| CN111421530B (en) * | 2020-03-27 | 2022-07-22 | 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) | Micro-gravity experimental platform for rope-driven flexible mechanical arm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2046962U (en) * | 1989-04-11 | 1989-11-01 | 北京市西城新开通用试验厂 | High-flow numerial-controlled regulating valve |
| JPH10252931A (en) * | 1997-03-17 | 1998-09-22 | Tgk Co Ltd | Solenoid proportional control valve |
| DE102005038751A1 (en) * | 2005-08-17 | 2007-02-22 | Robert Bosch Gmbh | Centering elements with damping effect for magnetic circuits of actuators |
| CN203500623U (en) * | 2013-09-11 | 2014-03-26 | 贵州红林机械有限公司 | Flow proportional electromagnetic valve |
| CN204004647U (en) * | 2014-08-22 | 2014-12-10 | 海门市油威力液压工业有限责任公司 | The integrated direct-acting type proportional overflow valve of pressure closed loop control figure |
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Address after: 226100 Jiangsu city of Nantong Province Haimen Haimen Town Road No. 749 Patentee after: Oil power hydraulic Polytron Technologies Inc Address before: 226100 Jiangsu city of Nantong Province Haimen Haimen Town Road No. 749 Patentee before: Haimen Youweili Hydraulic Co., Ltd. |