CN86208057U - Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force - Google Patents

Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force Download PDF

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Publication number
CN86208057U
CN86208057U CN 86208057 CN86208057U CN86208057U CN 86208057 U CN86208057 U CN 86208057U CN 86208057 CN86208057 CN 86208057 CN 86208057 U CN86208057 U CN 86208057U CN 86208057 U CN86208057 U CN 86208057U
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China
Prior art keywords
differential pressure
valve
feedback
passage
displacement force
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Ceased
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CN 86208057
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Chinese (zh)
Inventor
樊成华
邓景流
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Huanan (south China) Polytechnic College
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Huanan (south China) Polytechnic College
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Priority to CN 86208057 priority Critical patent/CN86208057U/en
Publication of CN86208057U publication Critical patent/CN86208057U/en
Ceased legal-status Critical Current

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Abstract

The utility model discloses a governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force, belonging to the field of transmission and control of fluid. The utility model is characterized in that a flow control system of the valve adopts a differential pressure displacement force feedback regulation device. The feedback regulation device is characterized in that when the differential pressure at both ends of a main valve core increases, the opening of the main valve core reduces to form negative feedback. Simultaneously, the variation of the pressure difference is converted to displacement through a back-feed spring to feed back to a pre-guide sliding valve in the form of spring force, and the converted pressure difference fed back to a pre-guide valve core through the back-feed spring is balanced with the given electromagnetic force. Because the inter-stage of a differential pressure transducer is negative feedback, the utility model has good static characteristics, dynamic characteristics and interference rejection.

Description

Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force
This model utility belongs to the Fluid Transmission and Control field.
At present, modal series flow control valve is Britain engineer Fu Limingqinken (FleemingJenRin) (1833~1885) invention.Its basic principle is approximate constant with pressure reduction before and after the Fixed differential reducing valve control flow controller, and regulates flow by the aperture that changes flow controller.Figure of description 1 is its typical structure principle chart.It is a kind of indirect control mode, although reduction valve contains the pressure reduction closed loop compensation, for the flow parameter, is still open loop control, thus its etc. Flow characteristics not good.In addition,, must give bigger control force, so just give and realize that electric-hydraulic proportion control has brought difficulty in order to overcome the power of surging and hydraulic card clamping force.
Adopt the electrohydraulic proportional velocity regulating valve of flow displacement force feedback principle, its working principle has one's own knack, and makes flow control technique that new progress arranged, and Figure of description 2 is its structure principle charts.The major defect of the electrohydraulic proportional velocity regulating valve of this employing flow Displacement Feedback principle is, although flow transducer is contained by the Flow-rate adjustment closed loop, the inter-stage of flow transducer is positive feedback, promptly when undesired signal appears in system, and load P for example 5Improve, the volume flowrate that then flows through flow transducer will reduce, and its stroke Z is toward the direction skew that reduces.This has just reduced the static characteristic and the dynamic characteristic of electrohydraulic proportional velocity regulating valve.In addition, it is that variation by flow obtains feedback signal that this series flow control valve De Inspection surveys level (flow transducer), because flow is a derived quantity, if therefore there are scarce prescribing a time limit such as local current limliting in runner in concrete structure, control flow rate will lose the function that ratio is regulated, and can't carry out calibration to this feedback regulation function.
The purpose of this utility model is in order to overcome the shortcoming of prior art, to improve the static characteristic and the dynamic characteristic of electrohydraulic proportional velocity regulating valve.
Main points of the present utility model are to have adopted pressure reduction displacement force feedback regulation device in the flow control system of this valve.The two ends of the differential pressure pickup (7) of pressure reduction displacement force feedback regulation device are with spring (11) supporting , And and formerly be mounted with feedback spring (10) between slide guide valve (12) and the differential pressure pickup (7).As oil suction chamber, it goes out control mouth (13) end of oil pocket (14) at differential pressure pickup with oil pocket with feedback spring.She Ji pressure reduction displacement force feedback regulation apparatus features is that the opening of main valve plug reduces, and promptly forms reverse feedback when the pressure reduction at main valve plug two ends increases in this manner.Simultaneously, the variation of this pressure reduction is converted into displacement, feeds back to guide's guiding valve, the opening of guide's guiding valve is reduced with the form of spring force by feedback spring.
Figure of description 3 is the fundamental diagrams that adopt the electrohydraulic proportional velocity regulating valve of pressure reduction displacement force feedback principle, and (1) is filler opening; (2) be regulator; (3) be damping hole; (4) be passage; (5) be passage; (6) be damping hole; (7) be differential pressure pickup (8) regulator back cavity; (9) be passage; (10) feedback spring; (11) be support spring; (12) guide's guiding valve; (13) be the control mouth of differential pressure pickup; (14) go out oil pocket; (15) proportion electro-magnet, hydraulic oil enters from filler opening (1), and one the tunnel enters differential pressure pickup (7) to going out oil pocket (14) through regulator (2), passage (5); Another road enters regulator back cavity (8) through damping hole (3), through the control mouth of passage (4) to guide's guiding valve (12), communicates with passage (5) through passage (9) then again; Oil pocket with feedback spring (10) communicates with passage (5) by damping hole (6).
Proportion electro-magnet produces the masterpiece that is directly proportional with electrical signal and is used for pilot-actuated valve (12), the main valve plug of pilot valve control two logical plug-in type regulators.The pressure of controller primary valve detects through differential pressure pickup (7) and is converted into differential pressure pickup stroke Z, feeds back to guide's spool and given electromagnetic force equilibrium by feedback spring.
When undesired signal appears in system, for example as induced pressure P BImprove, the pressure reduction that then acts on the differential pressure pickup will reduce, and the differential pressure pickup disequilibrium makes its stroke Z increase feedback spring power F RIncrease, the pilot valve opening is slightly opened greatly.The guide controls the change of half-bridge operating mode, makes P XValue is toward reducing the direction skew.At this moment, regulator just has out big variation, causes P ZThe trend that becomes big is arranged.Therefore, differential pressure pickup stroke Z just can return to original equilibrium position.
When other various interference appears in system, the self-regulating process to above-mentioned similar pressure reduction displacement force feedback also will take place.
Because the inter-stage of differential pressure pickup is reverse feedback, promptly when pressure reduction reduced, displacement increased, and displacement reduced when perhaps pressure reduction increased.Therefore its static characteristic and dynamic characteristic and antijamming capability are better than the electrohydraulic proportional velocity regulating valve that adopts flow displacement force feedback principle.
Figure of description 4 is these model utilitys---an embodiment of the electrohydraulic proportional velocity regulating valve of pressure reduction displacement force feedback principle, and wherein (1) is import oil; (2) be regulator; (3) be damping hole; (4) be passage; (5) be passage; (6) be damping hole; (7) be differential pressure pickup; (8) regulator back cavity; (9) be passage; (10) feedback spring; (11) be support spring; (12) guide's guiding valve; (13) be the control mouth of differential pressure pickup; (14) be oil pocket; (15) proportion electro-magnet.

Claims (2)

1, a kind of by proportion electro-magnet, guide's guiding valve, the regulator valve body, the electric-hydraulic proportion of the pressure reduction displacement force feedback principle that differential pressure pickup is formed is adjusted valve, the two ends that it is characterized in that differential pressure pickup [7] are with spring [11] supporting , And and formerly be mounted with feedback spring [10] between slide guide valve [12] and the differential pressure pickup [7].
2, described a kind of according to claim 1 by proportion electro-magnet, guide's guiding valve, the regulator valve body, the electrohydraulic proportional velocity regulating valve of the pressure reduction displacement force feedback principle that differential pressure pickup is formed, it is characterized in that hydraulic oil enters from filler opening (1), one the tunnel through regulator (2), passage (5) enters differential pressure pickup (7) to going out oil pocket (14), another road enters regulator back cavity (8) through damping hole (3), again through the control mouth of passage (4) to guide's guiding valve (12), communicate with passage (5) through passage (9) then, the oil pocket with feedback spring (10) communicates with passage (5) by damping hole (6).
CN 86208057 1986-10-16 1986-10-16 Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force Ceased CN86208057U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 86208057 CN86208057U (en) 1986-10-16 1986-10-16 Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 86208057 CN86208057U (en) 1986-10-16 1986-10-16 Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force

Publications (1)

Publication Number Publication Date
CN86208057U true CN86208057U (en) 1988-04-13

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ID=4810346

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 86208057 Ceased CN86208057U (en) 1986-10-16 1986-10-16 Governor valve of electrolytic solution proportion with feedback principle of differential pressure displacement force

Country Status (1)

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CN (1) CN86208057U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100429631C (en) * 2003-04-04 2008-10-29 迪芬巴赫控制系统股份有限公司 Electrically controlled actuating element on a machine
CN101886642A (en) * 2010-07-26 2010-11-17 海门市油威力液压工业有限责任公司 Pilot-operated electrical feedback proportional direction valve
CN103395712A (en) * 2013-08-19 2013-11-20 金华诺王液压控制科技有限公司 Output-characteristic-adjustable hydraulic capstan electrohydraulic control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100429631C (en) * 2003-04-04 2008-10-29 迪芬巴赫控制系统股份有限公司 Electrically controlled actuating element on a machine
CN101886642A (en) * 2010-07-26 2010-11-17 海门市油威力液压工业有限责任公司 Pilot-operated electrical feedback proportional direction valve
CN103395712A (en) * 2013-08-19 2013-11-20 金华诺王液压控制科技有限公司 Output-characteristic-adjustable hydraulic capstan electrohydraulic control system
CN103395712B (en) * 2013-08-19 2016-02-24 金华诺王液压控制科技有限公司 The hydraulic windlass electrohydraulic control system that a kind of output characteristic is adjustable

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