CN103148034A - Hydraulic proportioning valve - Google Patents
Hydraulic proportioning valve Download PDFInfo
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- CN103148034A CN103148034A CN2013100404585A CN201310040458A CN103148034A CN 103148034 A CN103148034 A CN 103148034A CN 2013100404585 A CN2013100404585 A CN 2013100404585A CN 201310040458 A CN201310040458 A CN 201310040458A CN 103148034 A CN103148034 A CN 103148034A
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- spool
- ejector rod
- rod connection
- connection mechanism
- specified position
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Abstract
The invention relates to a hydraulic proportioning valve, which comprises an oil path, a valve body, a valve core and a driving device, and is characterized by further comprising a spring mechanism and an ejector rod connection mechanism, wherein the spring mechanism is arranged at the tail end of the valve core; the valve core, the ejector rod connection mechanism and the driving device are sequentially arranged; and no threads are arranged on the valve core. When the hydraulic proportioning valve provided by the invention works, the driving device pushes the ejector rod connection mechanism to push the valve core forward to an assigned position, so that a spring of the spring mechanism is compressed; and when the driving device moves backward, the valve core moves backward through the elastic force of the spring mechanism.
Description
Technical field
The present invention relates to a kind of mechanical-hydraulic valve, specifically a kind of hydraulic proportion valve.
Background technique
Its spool afterbody of existing hydraulic proportion valve is threaded, shows as the screwed spool of tail end, as disclosed in the patent No. 201020104323.2.Its motion principle is stepper motor by transmitting gear with threads turn on movable valve plug realizing seesawing of spool, the shortcoming of this structure have following some:
1, difficulty of processing is high.Because spool and screw thread are one, this makes the length of spool increase, and spool is generally thinner, bending deflection phenomenon can occur man-hour in case grown adding.Secondly because spool and valve body so to be the quality of fit of clearance seal valve body and spool higher, this makes screw thread on spool, valve body and spool and valve body inner bore that higher concentricity will be arranged, this makes difficulty of processing increase.
, the quality of fit of spool, valve body reduces.Higher because so spool and valve body are the quality of fits of clearance seal valve body and spool, especially under hyperbaric environment.And the structure of spool and screw thread one, be certain to produce trueness error in the processing of internal and external threads with in the middle of coordinating, this writes the cooperation that error can pass to spool and valve body and is accumulated as resultant error, so cause the quality of fit of spool and valve body to reduce, produce too much leakage of oil and oil pressure wild effect under high-pressure situations.
3, because gear drive and spool are direct-connected, when being bound to so the gear rotation, spool also and then rotates, and be the absolute center that impossible be in valve body because the concentricity problem of screw thread and spool valve body makes spool, add the rotation of spool, this can make becomes a kind of disturbance under hyperbaric environment, can allow what is more spool produce dither, and this can be to the stable generation considerable influence of hydraulic system.
4, because the hydraulic oil of hydraulic system in real Environmental Conditions is not absolute cleaning, and the rotation of spool can make the probability that the particulate in hydraulic oil gone in the gap of precession valve body and spool increase, and this rotation meeting with particle produces larger destruction and causes spool stuck valve interior wall and spool outer wall.
Summary of the invention
The technical problem to be solved in the present invention is to provide on the basis of existing plunger Proportional valve that a kind of difficulty of processing is low, quality of fit is high, hyperbaric environment is more stable and relatively be not easy stuck hydraulic proportion valve.
In order to overcome the above problems, it changes the structure of traditional spool, screw thread one into technological scheme that spool and ejector rod connection mechanism are separated, is specially:
A kind of hydraulic proportion valve, comprise oil circuit, valve body, spool and drive unit, it also comprises spring mechanism and ejector rod connection mechanism, and spring mechanism is arranged on the spool tail end, and spool, ejector rod connection mechanism and drive unit are arranged sequentially, on spool without screw thread, during work, drive unit promotes ejector rod connection mechanism and pushes ahead spool to specified position, and this moment, the spring of spring mechanism was compressed, when drive unit retreats, realize that by the elastic force of spring mechanism spool retreats to specified position.
preferably, described drive unit is stepper motor, described stepper motor is with gear, described ejector rod connection mechanism stage casing has screw thread and described valve body to carry out the screw thread coupling, described ejector rod connection mechanism afterbody is provided with gear, gear by described stepper motor rotates the gear that drives described ejector rod connection mechanism, transmitting onward impulse under the effect of described ejector rod connection mechanism stage casing screw thread makes described ejector rod connection mechanism promote described spool to advance to specified position, described spring mechanism compression this moment, when the described spool of needs retreats into specified position, described stepper motor backward rotation, drive the gear of described ejector rod connection mechanism, transmit under the effect of described ejector rod connection mechanism stage casing screw thread and retreat power and make described ejector rod connection mechanism retreat to specified position, this moment, described spool also retreated to specified position under the stretching, extension elastic force effect of described spring assembly.
Preferably, its drive unit is proportion electro-magnet, and when the needs spool advanced to specified position, the push rod in proportion electro-magnet advanced, and makes the ejector rod connection mechanism Compress Spring band movable valve plug that advances advance; When the needs spool retreated into specified position, the push rod in proportion electro-magnet retreated, and made ejector rod connection mechanism and spool retreat to specified position under the elastic force effect of spring.
After adopting this scheme, due to spool and ejector rod connection mechanism separately the most directly show as no longer one of screw thread and spool valve body, this makes the concentricity problem that needn't consider screw thread and spool valve body man-hour adding, makes difficulty of processing greatly reduce.Because screw thread and spool valve body no longer one no longer exert an influence to the quality of fit of spool valve body except the concentricity problem that has solved screw thread and spool valve body also makes the mismatch error of internal and external threads when assembling, greatly increased thus the quality of fit of spool and valve body.Moreover because spool and gear drive separate, when rotating, gear mechanism can not drive valve core rotation again, this has namely been avoided when the hydraulic system high pressure disturbance to hydraulic oil, reduce again the molecule in hydraulic oil and involved in probability between spool and valve body matching gap, make that spool is stuck probability reduce, this has greatly increased it and has got stable when high-pressure work.
Description of drawings
[0012] Fig. 1 is the structural drawing that adopts the hydraulic proportion valve of stepper motor mode.
In figure: 1---valve body, 2---spool, 3---spring mechanism, 4---ejector rod connection mechanism, 5---the push rod gear, 6---stepping motor gear, 7---stepper motor, 8---screw thread.
Fig. 2 is the structural drawing of the hydraulic proportion valve of proportion electro-magnet mode.
In figure: 1---valve body, 2---spool, 3---spring mechanism, 4---ejector rod connection mechanism, 5---push rod, 6---proportion electro-magnet
Embodiment
In order to make purpose of the present invention, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The specific works mode is as follows:
Embodiment 1:
As Fig. 1, a kind of hydraulic proportion valve comprises oil circuit, valve body 1, spool 2 and stepper motor 7.It also comprises spring mechanism 3 and ejector rod connection mechanism 4, spring mechanism 3 is arranged on spool 2 tail ends, ejector rod connection mechanism 4 stage casings have screw thread 8 and described valve body 1 to carry out the screw thread coupling, ejector rod connection mechanism 4 afterbodys are provided with push rod gear 5, and spool 2, ejector rod connection mechanism 4 and stepper motor 7 are arranged sequentially.When needs spool 2 advances to specified position, stepper motor 7 rotates, rotate ejector rod connection mechanism 4 by stepping motor gear 6, push rod gear 5, ejector rod connection mechanism 4 travels forward under the screw thread acting in conjunction of screw thread 8 and valve body 1, promote spool 2 and advance to specified position, spring mechanism 3 compressions this moment; When needs spool 2 retreats into specified position, stepper motor 7 backward rotation, by stepping motor gear 6, push rod gear 5 backward rotation ejector rod connection mechanisms 4, this moment, the screw thread acting in conjunction lower push rod bindiny mechanism 4 at screw thread 8 and valve body 1 retreated to specified position.This moment, spool 2 also retreated to specified position under the stretching, extension elastic force effect of spring assembly 3.So constantly repeat, so that spool 2 is on the working position of hydraulic proportion valve needs.In whole process, spool 2 is not done unnecessary rotatablely moving except doing necessary seesawing, and because of directly not being connected with push rod gear 5 of spool 2, so can not consider its disturbing factor when spool 2 and valve body 1 coordinate, namely make processing simply can improve again the quality of fit of spool 2 and valve body 1, make it more stable under hyperbaric environment.
Embodiment 2:
As Fig. 2, to compare with embodiment 1, embodiment 2 difference is that the drive unit of hydrovalve is proportion electro-magnet 6, ejector rod connection mechanism 4 stage casings are without screw thread, the afterbody gearless.When needs spool 2 advanced to specified position, the push rod 5 in proportion electro-magnet 6 advanced, and made the ejector rod connection mechanism 4 compression spring mechanism 3 band movable valve plugs 2 that advance advance to specified position; When needs spool 2 retreated into specified position, the push rod 5 in proportion electro-magnet 6 retreated, and made push rod ejector rod connection mechanism 4 and spool 2 also retreat to specified position under the elastic force effect of spring 4.In whole process, spool is not done unnecessary rotatablely moving except doing necessary seesawing.
[0019]The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (3)
1. hydraulic proportion valve, comprise oil circuit, valve body, spool and drive unit, it is characterized in that: it also comprises spring mechanism and ejector rod connection mechanism, described spring mechanism is arranged on described spool tail end, described spool, described ejector rod connection mechanism and described drive unit are arranged sequentially, on described spool without screw thread, during work, described drive unit promotes described ejector rod connection mechanism and pushes ahead described spool to specified position, this moment, the spring of described spring mechanism was compressed, when described drive unit retreats, realize that by the elastic force of described spring mechanism described spool retreats into specified position.
2. hydraulic proportion valve as claimed in claim 1, it is characterized in that: described drive unit is stepper motor, described stepper motor is with gear, described ejector rod connection mechanism stage casing has screw thread and described valve body to carry out the screw thread coupling, described ejector rod connection mechanism afterbody is provided with gear, gear by described stepper motor rotates the gear that drives described ejector rod connection mechanism, transmitting onward impulse under the effect of described ejector rod connection mechanism stage casing screw thread makes described ejector rod connection mechanism promote described spool to advance to specified position, described spring mechanism compression this moment, when the described spool of needs retreats into specified position, described stepper motor backward rotation, drive the gear of described ejector rod connection mechanism, transmit under the effect of described ejector rod connection mechanism stage casing screw thread and retreat power and make described ejector rod connection mechanism retreat to specified position, this moment, described spool also retreated to specified position under the stretching, extension elastic force effect of described spring assembly.
3. hydraulic proportion valve as claimed in claim 1, it is characterized in that: described drive unit is proportion electro-magnet, when the described spool of needs advances to specified position, push rod in described proportion electro-magnet advances, make the described ejector rod connection mechanism Compress Spring that advances drive described spool and advance, when the described spool of needs retreated into specified position, the push rod in described proportion electro-magnet retreated, and made described ejector rod connection mechanism and described spool retreat into specified position under the elastic force effect of spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100404585A CN103148034A (en) | 2013-02-02 | 2013-02-02 | Hydraulic proportioning valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100404585A CN103148034A (en) | 2013-02-02 | 2013-02-02 | Hydraulic proportioning valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103148034A true CN103148034A (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013100404585A Pending CN103148034A (en) | 2013-02-02 | 2013-02-02 | Hydraulic proportioning valve |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417241A (en) * | 1992-04-15 | 1995-05-23 | Hydraulic-Ring Antriebs-Und Steuerungstechnik Gmbh | Valve arrangement |
| US5785087A (en) * | 1996-04-03 | 1998-07-28 | Ebara Corporation | Water hydraulic proportional control valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1616799A (en) * | 2004-11-12 | 2005-05-18 | 宁波华液机器制造有限公司 | Three-way ratio pressure reducing control valve |
| CN1995787A (en) * | 2006-01-06 | 2007-07-11 | 卡特彼勒公司 | Fluid-control system |
| CN101008413A (en) * | 2007-01-12 | 2007-08-01 | 路文忠 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
| CN201382038Y (en) * | 2009-01-19 | 2010-01-13 | 杭州鑫高科技有限公司 | Speed-regulating and pressure-regulating digital valve |
| CN203161695U (en) * | 2013-02-02 | 2013-08-28 | 无锡市晟瑞机械电子有限公司 | Hydraulic proportional valve |
-
2013
- 2013-02-02 CN CN2013100404585A patent/CN103148034A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417241A (en) * | 1992-04-15 | 1995-05-23 | Hydraulic-Ring Antriebs-Und Steuerungstechnik Gmbh | Valve arrangement |
| US5785087A (en) * | 1996-04-03 | 1998-07-28 | Ebara Corporation | Water hydraulic proportional control valve |
| CN1603635A (en) * | 2004-11-05 | 2005-04-06 | 宁波华液机器制造有限公司 | Proportional differential pressure control valve |
| CN1616799A (en) * | 2004-11-12 | 2005-05-18 | 宁波华液机器制造有限公司 | Three-way ratio pressure reducing control valve |
| CN1995787A (en) * | 2006-01-06 | 2007-07-11 | 卡特彼勒公司 | Fluid-control system |
| CN101008413A (en) * | 2007-01-12 | 2007-08-01 | 路文忠 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
| CN201382038Y (en) * | 2009-01-19 | 2010-01-13 | 杭州鑫高科技有限公司 | Speed-regulating and pressure-regulating digital valve |
| CN203161695U (en) * | 2013-02-02 | 2013-08-28 | 无锡市晟瑞机械电子有限公司 | Hydraulic proportional valve |
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Application publication date: 20130612 |