CN204436910U - A kind of asymmetric hydraulic efficiency servo-valve - Google Patents
A kind of asymmetric hydraulic efficiency servo-valve Download PDFInfo
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- CN204436910U CN204436910U CN201420766865.4U CN201420766865U CN204436910U CN 204436910 U CN204436910 U CN 204436910U CN 201420766865 U CN201420766865 U CN 201420766865U CN 204436910 U CN204436910 U CN 204436910U
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Abstract
The utility model relates to a kind of asymmetric hydraulic efficiency servo-valve, comprise magnet case, lower magnet case, spool, valve pocket, described spool periphery arranges valve pocket and the outside mounting magnetic steel of valve body above spool, the upper and lower both sides of this magnet steel arrange magnet case, lower magnet case successively respectively, are horizontally disposed with armature between described upper magnet case and lower magnet case; Described armature center mounting spring pipe and be fixedly installed feedback rod in bourdon tube inside; The valve body of described bourdon tube lower periphery installs nozzle; Place of described valve pocket bottom centre offers meter out hole; Oil return accent is offered in valve body bottom surface relative immediately below described feedback rod, and this oil return accent arranged on left and right sides is offered respectively successively and controlled oil pocket mouth one, controls oil pocket mouth two, offers filler opening in the valve body bottom surface controlling oil pocket mouth two opposite side.The utility model beneficial effect is: be conducive to reducing manufacture difficulty, can save and take up room, save fabricating cost, can improve control accuracy.
Description
Technical field
The utility model relates to a kind of hydraulic pressure control valve, particularly relates to a kind of asymmetric hydraulic efficiency servo-valve.
Background technique
Hydraulic control servovalve mainly refers to that electrohydraulic control is after accepting electric simulation signal, corresponding flow and the pressure exporting modulation.It is electro-hydraulic converting element, also be power amplification element, low power faint electrical input signal can be converted to powerful hydraulic energy (flow and pressure) and export by it, in electrohydraulic servo system, electric part and hydraulic part couple together by it, and the conversion and the hydraulic pressure that realize electric liquid signal amplify; Electrohydraulic control is the core that electrohydraulic servo system controls.Typical servovalve is made up of Characteristics of Permanent Magnet Torque Motor, nozzle, plate washer, spool, valve pocket and control chamber; When input coil passes into electric current, plate washer moves right, and the throttling action of the right nozzle is strengthened, and flow reduces, and right side back pressure rises; Make leftmost nozzle throttling action reduce, flow increases, left dorsal drops simultaneously; The active force disequilibrium at spool two ends, spool is moved to the left then, and high pressure oil flows to C2 from S, delivers to load, and load oil return flows through return opening by C1, enters fuel tank; The displacement amount of spool is directly proportional to the input current of torque motor, acts on hydraulic coupling on spool and spring force balances each other, and therefore the difference current of torque motor is directly proportional to the displacement of spool in the state of the equilibrium.
Servovalve is mainly used in electric hydraulic servo-system as executive component.In servo-system, hydraulic actuator is compared with electric and pneumatic actuator, has the features such as rapidity is good, unit weight output power large, stable drive, antijamming capability are strong.
Existing servovalve complicated structure, cost are high, require high to the quality of oil and turbidity test.This case is it is important to note that for the structure of above servovalve, and servovalve, as the conventional core parts in hydraulic servo field, has very high requirement to its resolution, symmetry properties, dead band, stagnant ring, frequency range; It is symmetrical by the flow of P → A, B → T to show common servovalve, is to improve control accuracy, needs symmetrical oil cylinder servo-cylinder also being made two rod.But two go out rod oil cylinder seldom to add than the length difference singly going out rod oil cylinder and be twice, manufacture difficulty also strengthens many, and thus cost is high and take up room large; Singly go out rod oil cylinder operationally rodless cavity and rod chamber different many into and out of fluid, can be unstable when controlling dynamic with traditional servo valves.Therefore, for above aspect, need reasonably to improve prior art.
Model utility content
For above defect, the utility model provides a kind of being conducive to reduce manufacture difficulty, can save the asymmetric hydraulic efficiency servo-valve taking up room, save fabricating cost, can improve control accuracy, to solve many deficiencies of prior art.
For achieving the above object, the utility model is by the following technical solutions:
A kind of asymmetric hydraulic efficiency servo-valve, comprise magnet case, lower magnet case, spool, valve pocket, described spool periphery arranges valve pocket and the outside mounting magnetic steel of valve body above spool, the upper and lower both sides of this magnet steel arrange magnet case, lower magnet case successively respectively, be horizontally disposed with armature and on armature, control coil be housed between described upper magnet case and lower magnet case;
Described armature center mounting spring pipe and be fixedly installed feedback rod in bourdon tube inside, is inserted in baffle plate outside feedback rod and between bourdon tube tube wall; Meanwhile, the valve body of described bourdon tube lower periphery installs nozzle;
Place of described valve pocket bottom centre offers meter out hole, and the valve inner below spool installs oil filter unit and these oil filter unit both sides offer a throttle orifice respectively;
Oil return accent is offered in valve body bottom surface relative immediately below described feedback rod, and this oil return accent arranged on left and right sides is offered respectively successively and controlled oil pocket mouth one, controls oil pocket mouth two, offers filler opening in the valve body bottom surface controlling oil pocket mouth two opposite side.
Described control oil pocket mouth two, control oil pocket mouth one face b1 mouth, a1 mouth above oil filter unit successively respectively, also with a2 mouth, b2 mouth between b1 mouth and a1 mouth.
When spool is moved to the left, pressure oil P flows to A chamber by square hole a1, and B chamber oil flows back to T chamber by square hole b2; When spool moves right, pressure oil flows to B chamber by square hole b1, and T chamber is flowed back in You Youa2 hole, A chamber, and because a1, a2 square hole is wider than b1, b2 square hole, the flow on both sides is also greatly different.
The beneficial effect of asymmetric hydraulic efficiency servo-valve described in the utility model is: when spool is moved to the left, and pressure oil P flows to A chamber by square hole a1, and B chamber oil flows back to T chamber by square hole b2; When spool moves right, pressure oil flows to B chamber by square hole b1, and T chamber is flowed back in You Youa2 hole, A chamber, because a1, a2 square hole is wider than b1, b2 square hole, the flow on both sides is also greatly different, is conducive to reducing manufacture difficulty, can saves and take up room, save fabricating cost, can improve control accuracy.
Accompanying drawing explanation
With reference to the accompanying drawings the utility model is described in further detail below.
Fig. 1 is the structural representation of asymmetric hydraulic efficiency servo-valve described in the utility model embodiment;
Fig. 2 is the valve pocket generalized section of asymmetric hydraulic efficiency servo-valve described in the utility model embodiment;
Fig. 3 is the housing configuration schematic diagram of asymmetric hydraulic efficiency servo-valve described in the utility model embodiment;
Fig. 4 is that the M-M of Fig. 2 is to generalized section;
Fig. 5 is that the N-N of Fig. 2 is to generalized section.
In figure:
1, magnet steel; 2, upper magnet case; 3, control coil; 4, armature; 5, bourdon tube; 6, baffle plate; 7, lower magnet case; 8, nozzle; 9, feedback rod; 10, spool; 11, valve pocket; 12, meter out hole; 13, throttle orifice; 14, oil filter unit; 15, oil-feed P mouth; 16, oily B accent is controlled; 17, oil return T accent; 18, oily A accent is controlled.
Embodiment
As Figure 1-5, asymmetric hydraulic efficiency servo-valve described in the utility model embodiment, comprise magnet case 2, lower magnet case 7, spool 10, valve pocket 11, described spool 10 periphery arranges valve pocket 11 and the outside mounting magnetic steel 1 of valve body above spool 10, these upper and lower both sides of magnet steel 1 arrange magnet case 2, lower magnet case 7 successively respectively, be horizontally disposed with armature 4 and on armature 4, control coil 3 be housed between described upper magnet case 2 and lower magnet case 7; Described armature 4 center mounting spring pipe 5 and be fixedly installed feedback rod 9 in bourdon tube 5 inside, is inserted in baffle plate 6 outside feedback rod 9 and between bourdon tube 5 tube wall; Meanwhile, the valve body of described bourdon tube 5 lower periphery installs nozzle 8;
Correspondingly, place of described valve pocket 11 bottom centre offers meter out hole 12, and the valve inner below spool 10 installs oil filter unit 14 and these oil filter unit 14 both sides offer a throttle orifice 13 respectively;
Correspondingly, oil return T accent 17 is offered in valve body bottom surface relative immediately below described feedback rod 9, this oil return T accent 17 arranged on left and right sides is offered respectively successively and is controlled oily A accent 18, controls oily B accent 16, offers oil-feed P mouth 15 in the valve body bottom surface controlling oily B accent 16 opposite side; Meanwhile, control wherein oil B accent 16, control oily A accent 18 and face b1 mouth, a1 mouth above oil filter unit 14 successively respectively, also with a2 mouth, b2 mouth between b1 mouth and a1 mouth.
Asymmetric hydraulic efficiency servo-valve described in above the utility model embodiment, i.e. P → A, B → T or P → B, the flow of A → T is greatly different, can by single shaft oil cylinder rodless cavity, the area ratio of rod chamber, P → A, the flow in two chambeies of B → T also makes this ratio value, thus reaches the symmetry control singly going out rod oil cylinder; A mouth as this servovalve connects oil cylinder rodless cavity, B mouth connects rod chamber, suppose this cylinder rodless cavity area: rod chamber area=5:2, then P → A flow of this servovalve being made 5, B → T flow and make 2, is also 5:2, they are operationally like this, A, B two flowed friction and the hydraulic powers in chamber are just identical, asymmetricly reach the symmetrical control effects born as positive with two.Thus, the uninterrupted of servovalve is that the number of institute's opening square hole on valve pocket and width determine, as long as be split into same P → B and B → T hole is wide different wide for wide for the P → A hole corresponding to A chamber and A → T hole, be split into the ratio required for us, just can make the asymmetric servo valve of different flow ratio.
When spool 10 is moved to the left, pressure oil P flows to A chamber by square hole a1, and B chamber oil flows back to T chamber by square hole b2, otherwise, when spool moves right, pressure oil flows to B chamber by square hole b1, and T chamber is flowed back to, due to a1 in You Youa2 hole, A chamber, a2 square hole is wider than b1, b2 square hole, so the flow on both sides is greatly different.
The above-mentioned description to embodiment can understand and apply this case technology for the ease of those skilled in the art, person skilled in the art obviously can make various amendment to these examples easily, and General Principle described herein is applied in other embodiment and need not through performing creative labour.Therefore, this case is not limited to above embodiment, and the improvement made for this case and amendment all should in this case protection domains.
Claims (4)
1. an asymmetric hydraulic efficiency servo-valve, comprises magnet case (2), lower magnet case (7), spool (10), valve pocket (11), it is characterized in that:
Described spool (10) periphery arranges valve pocket (11) and the outside mounting magnetic steel (1) of the valve body of spool (10) top, this magnet steel (1) upper and lower both sides arrange magnet case (2), lower magnet case (7) successively respectively, be horizontally disposed with armature (4) and on armature (4), control coil (3) be housed between described upper magnet case (2) and lower magnet case (7);
Described armature (4) center mounting spring pipe (5) and be fixedly installed feedback rod (9) in bourdon tube (5) inside, is inserted in baffle plate (6) between feedback rod (9) outside and bourdon tube (5) tube wall; Meanwhile, the valve body of described bourdon tube (5) lower periphery installs nozzle (8);
Place of described valve pocket (11) bottom centre offers meter out hole (12), and the valve inner below spool (10) installs oil filter unit (14) and this oily unit (14) both sides of filtering offer a throttle orifice (13) respectively;
Oil return accent is offered in valve body bottom surface relative immediately below described feedback rod (9), and this oil return accent arranged on left and right sides is offered respectively successively and controlled oil pocket mouth one, controls oil pocket mouth two, offers filler opening in the valve body bottom surface controlling oil pocket mouth two opposite side.
2. asymmetric hydraulic efficiency servo-valve according to claim 1, is characterized in that: described control oil pocket mouth two, control oil pocket mouth one face b1 mouth, the a1 mouth of oil filter unit (14) top successively respectively, also with a2 mouth, b2 mouth between b1 mouth and a1 mouth.
3. asymmetric hydraulic efficiency servo-valve according to claim 1, is characterized in that: when spool (10) is moved to the left, pressure oil P flows to A chamber by square hole a1, and B chamber oil flows back to T chamber by square hole b2.
4. asymmetric hydraulic efficiency servo-valve according to claim 1, is characterized in that: when spool (10) moves right, pressure oil flows to B chamber by square hole b1, T chamber is flowed back in You Youa2 hole, A chamber, because a1, a2 square hole compares b1, b2 square hole is wide, and the flow on both sides is also greatly different.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420766865.4U CN204436910U (en) | 2014-12-09 | 2014-12-09 | A kind of asymmetric hydraulic efficiency servo-valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420766865.4U CN204436910U (en) | 2014-12-09 | 2014-12-09 | A kind of asymmetric hydraulic efficiency servo-valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259933A (en) * | 2015-10-22 | 2016-01-20 | 重庆中控惠通仪表科技集团有限公司 | Throttling device of two-stage control |
| CN106704306A (en) * | 2017-03-24 | 2017-05-24 | 中冶华天工程技术有限公司 | Device and method for suppressing self-excited oscillation of servo valve by adjustable nozzle-baffle distance |
| CN110206781A (en) * | 2019-05-27 | 2019-09-06 | 辽宁工程技术大学 | A kind of asymmetric four-side formula digital fluid cylinder |
| CN111102261A (en) * | 2019-12-24 | 2020-05-05 | 中航工业南京伺服控制系统有限公司 | Force feedback positive gain type electro-hydraulic pressure servo valve |
| CN112112864A (en) * | 2020-10-12 | 2020-12-22 | 辽宁工程技术大学 | Load pressure control type digital fluid cylinder |
| CN113153849A (en) * | 2021-04-25 | 2021-07-23 | 陈惠波 | Hydraulic servo valve |
-
2014
- 2014-12-09 CN CN201420766865.4U patent/CN204436910U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259933A (en) * | 2015-10-22 | 2016-01-20 | 重庆中控惠通仪表科技集团有限公司 | Throttling device of two-stage control |
| CN105259933B (en) * | 2015-10-22 | 2017-10-31 | 重庆中控惠通仪表科技集团有限公司 | The throttling arrangement of two-stage regulation and control |
| CN106704306A (en) * | 2017-03-24 | 2017-05-24 | 中冶华天工程技术有限公司 | Device and method for suppressing self-excited oscillation of servo valve by adjustable nozzle-baffle distance |
| CN110206781A (en) * | 2019-05-27 | 2019-09-06 | 辽宁工程技术大学 | A kind of asymmetric four-side formula digital fluid cylinder |
| CN111102261A (en) * | 2019-12-24 | 2020-05-05 | 中航工业南京伺服控制系统有限公司 | Force feedback positive gain type electro-hydraulic pressure servo valve |
| CN112112864A (en) * | 2020-10-12 | 2020-12-22 | 辽宁工程技术大学 | Load pressure control type digital fluid cylinder |
| CN113153849A (en) * | 2021-04-25 | 2021-07-23 | 陈惠波 | Hydraulic servo valve |
| CN113153849B (en) * | 2021-04-25 | 2023-09-15 | 沈阳帕维电力技术有限公司 | Hydraulic servo valve |
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Address after: 201508 Shanghai city Jinshan District Shanyang Zhen Shan Feng Road No. 58 Patentee after: SHANGHAI CHAOTIAN INDUSTRY CO., LTD. Address before: 201508 Jinshan District, Shanyang Town, Zhu Shan Road, No. 10, building 451, No. Patentee before: Shanghai Chaotian Industrial Co., Ltd. |