CN103075560A - Electro-hydraulic proportional valve - Google Patents
Electro-hydraulic proportional valve Download PDFInfo
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- CN103075560A CN103075560A CN2012104609804A CN201210460980A CN103075560A CN 103075560 A CN103075560 A CN 103075560A CN 2012104609804 A CN2012104609804 A CN 2012104609804A CN 201210460980 A CN201210460980 A CN 201210460980A CN 103075560 A CN103075560 A CN 103075560A
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Abstract
The invention discloses an electro-hydraulic proportional valve which comprises a coil, a magnetic inductive piece, a guide sleeve, an armature, a valve core pushing block, a valve core and a hydraulic valve sleeve. The edge on the upper part in the armature is cylindrical, and the edge on the lower part in the armature is cone-shaped. The armature is accommodated on the upper part of a cylindrical cavity of the guide sleeve and can move up and down axially. The valve core pushing block is fixedly arranged at the lower end of a tube cavity of the armature. The hydraulic valve sleeve is fixedly arranged on the lower part of the cylindrical cavity of the guide sleeve. The inner edge on the upper part of the hydraulic valve sleeve is further cone-shaped with the same angle as the edge on the lower part of the armature. When the armature moves from the starting end downward to a limited position, the lower part of the armature extends into the cone-shaped cavity on the upper part of the hydraulic valve sleeve and a limiting gap exists between the cone-shaped edge on the lower part of the armature and the cone-shaped inner edge on the upper part of the hydraulic valve sleeve axially. A gap exists between the lower end of the armature and the lower end face of the hydraulic valve sleeve. According to the electro-hydraulic proportional valve provided by the invention, main parts are regular in shape, simple to process and low in precision requirement, and waste on raw materials and the processing cost can be reduced.
Description
Technical field
The present invention relates to a kind of electro-hydraulic proportional valve.
Background technique
Electro-hydraulic proportional valve is that electromagnet module makes the operating valve spool produce displacement according to the current signal generation corresponding actions of input in the valve, and port size changes and finishes the element of pressure proportional to input current, flow output with this.Spool travel also can feed back with the form of machinery, hydraulic pressure or electricity.Since electro-hydraulic proportional valve have various, the easy composition of form kind use electric and computer-controlled various electrohydraulic system, control accuracy high, install and use flexibly and many-sided advantage such as contamination resistance is strong, so application is widened day by day.
Electro-hydraulic proportional valve, the shape and size by the electromagnet module in the valve accurately design, and make electro-hydraulic proportional valve that electromagnetic force proportional to electric current is provided in stroke range, reach the purpose of control hydraulic module output pressure proportional to input voltage or flow.
A kind of common electro-hydraulic proportional valve comprises housing 18, coil 15, magnetic conducting plate 14, guide pin bushing 11, armature 12, spool pushing block 16, spool 17 as shown in Figure 1;
Described armature 12 is circular tube shaped, and described spool pushing block 16 is fixed in described tubulose armature 12 lower ends;
Described guide pin bushing 11 is formed with a circular cylindrical cavity, the cavity upper end open of described guide pin bushing 11, and the lower end surface is formed with a circular hole, and the guide pin bushing sidewall outer rim of close lower end surface is formed with a V-type groove 111,
Described armature 12 is contained in the cavity of described guide pin bushing 11, and can move up and down vertically;
Described coil 15 is set in outside the described guide pin bushing 11;
Described magnetic conducting plate 14 is arranged on the up and down two ends of described coil 15, and described magnetic conducting plate 14 is with described guide pin bushing 11 contacts;
Described guide pin bushing 11, magnetic conducting plate 14 are the magnetic conductive metal material;
Described spool 17 passes the circular hole of described guide pin bushing 14 lower end surfaces.
Electro-hydraulic proportional valve shown in Figure 1, when coil passes into electric current, when armature moves downward vertically, described spool pushing block promotes described spool and moves downward vertically, gap between the armature and guide lower end surface diminishes gradually, magnetic resistance reduces, magnetic flux by whole magnetic circuit increases, and the magnetic flux that increases can leak away from the V-type groove that is formed at guide pin bushing sidewall outer rim, thereby the magnetic flux that guarantees the generation electromagnetic force between the armature and guide lower end surface is basicly stable in the armature travel scope, make electro-hydraulic proportional valve that electromagnetic force proportional to electric current is provided in stroke range, make vertically stable moving downward of described spool.
Electro-hydraulic proportional valve shown in Figure 1, guide pin bushing sidewall outer rim be owing to need forming the V-type groove, complex structure, and requirement on machining accuracy is high, and has the waste of raw materials phenomenon.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of electro-hydraulic proportional valve, the major part regular shape, and processing is simple, and required precision is low, can reduce waste of raw materials, reduces processing cost.
For solving the problems of the technologies described above, electro-hydraulic proportional valve of the present invention, it comprises coil, magnetic conducting plate, guide pin bushing, armature, spool pushing block, spool, hydraulic pressure valve pocket;
Described guide pin bushing is formed with a circular cylindrical cavity;
Described armature is tubulose, and armature middle and upper part outer rim is cylinder type, and the bottom outer rim is frustum type wide at the top and narrow at the bottom; Described armature is coaxial to be placed in the top of circular cylindrical cavity of described guide pin bushing, and can move up and down vertically;
Described spool pushing block cooperates the coaxial tube chamber lower end that is fixed on described armature by being full of;
Described hydraulic pressure valve pocket is tubulose, in the bottom of hydraulic pressure valve pocket by the coaxial circular cylindrical cavity that is fixed on described guide pin bushing of interference fit;
The inner edge on described hydrovalve cover top becomes the wide at the top and narrow at the bottom frustum type identical with the outer rim angle of described armature bottom;
Center, described hydraulic pressure valve pocket lower end surface is formed with a circular hole;
Described spool passes the circular hole of described hydraulic pressure valve pocket lower end surface, and can move up and down vertically;
When described armature is moved down into spacing position, described armature bottom is insinuated in the taper type cavity on described hydrovalve cover top, and armature bottom frustum type outer rim has a spacing air gap in the axial direction with intermarginal in the frustum type of described hydrovalve cover top, and there is the gap in described armature lower end between the lower end surface with described hydraulic pressure valve pocket;
Described coil is set in outside the described guide pin bushing;
Described magnetic conducting plate is arranged on the up and down two ends of described coil, and described magnetic conducting plate inner edge is fitted with described guide pin bushing outer rim;
Described guide pin bushing, magnetic conducting plate, hydraulic pressure valve pocket are the magnetic conductive metal material.
Better, described armature is fixed with a limited ring with the guide pin bushing inner edge of described hydrovalve inner room, and the position that described armature moves down when abutting to described limited ring is spacing position.
Better, described limited ring is plastics or copper packing ring.
Better, described armature is when spacing position, and described armature lower end is lower than the minimum diameter place of described hydrovalve cover top frustum type inner edge.
Better, electro-hydraulic proportional valve also comprises housing; Described housing is set in the outer rim of described coil and magnetic conducting plate.
Better, described armature middle and upper part outer rim is fitted with described guide pin bushing inner edge.
Better, the maximum diameter place of hydrovalve cover top frustum type inner edge is higher than the upper end of the magnetic conducting plate that is arranged on the coil lower end;
The minimum diameter place of hydrovalve cover top frustum type inner edge is at up and down between the two ends of the magnetic conducting plate that is arranged on the coil lower end.
Better, described armature bottom frustum type outer rim and hydrovalve cover top frustum type inner edge, the angle between coaxial line is 10～30 °;
Described spacing air gap is 0.6～1.6mm;
Described armature is 0.4-2.0mm from the stroke that initial position moves to spacing position;
The minimum diameter of armature bottom frustum type outer rim is 4.0～8.0mm;
The maximum diameter of hydrovalve cover top frustum type inner edge is 7.0～9.0mm.
Electro-hydraulic proportional valve of the present invention utilizes armature and hydraulic pressure valve pocket to joining end conical surface angle and position, cooperates the leakage field effect of magnetic conduction guide pin bushing, realizes the steady characteristic of electromagnetic force in stroke range.Armature, hydraulic pressure valve pocket and guide pin bushing all are regular shape, and processing is simple, and required precision is low, can reduce waste of raw materials, reduce processing cost.
Description of drawings
In order to be illustrated more clearly in technological scheme of the present invention, the below does simple the introduction to the accompanying drawing that will use required for the present invention, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is existing a kind of electro-hydraulic proportional valve schematic diagram;
Fig. 2 is electro-hydraulic proportional valve one embodiment's schematic diagram of the present invention;
Fig. 3 be electro-hydraulic proportional valve one embodiment of the present invention in armature travel, armature is with the electromagnetic force change curve of hydrovalve inner room.
Embodiment
Below in conjunction with accompanying drawing, the technological scheme among the present invention is carried out clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment among the present invention, all other embodiments that those of ordinary skills obtain under the prerequisite of not making creative work belong to the scope of protection of the invention.
Embodiment one
Electro-hydraulic proportional valve comprises housing 18, coil 15, magnetic conducting plate 14, guide pin bushing 11, armature 12, spool pushing block 16, spool 17, hydraulic pressure valve pocket 19 as shown in Figure 2;
Described guide pin bushing 11 is formed with a circular cylindrical cavity;
Described armature 12 is tubulose, and armature middle and upper part outer rim is cylinder type, and the bottom outer rim is frustum type wide at the top and narrow at the bottom;
Described armature 12 in the top of the coaxial circular cylindrical cavity that is placed in described guide pin bushing 11, and can move up and down vertically; Better, described armature middle and upper part outer rim is fitted with described guide pin bushing inner edge;
Described spool pushing block 16 is by the coaxial tube chamber lower end that is fixed on described armature of interference fit;
Described hydraulic pressure valve pocket 19 is tubulose, in the bottom of hydraulic pressure valve pocket 19 by the coaxial circular cylindrical cavity that is fixed on described guide pin bushing 11 of interference fit;
The inner edge on described hydraulic pressure valve pocket 19 tops becomes the wide at the top and narrow at the bottom frustum type identical with the outer rim angle of described armature 12 bottoms;
Center, described hydraulic pressure valve pocket 19 lower end surface is formed with a circular hole;
Described spool 17 passes the circular hole of described hydraulic pressure valve pocket 19 lower end surfaces, and can move up and down vertically;
When described coil adds electric current, when described armature 12 is moved down into spacing position, described armature 12 bottoms are insinuated in the taper type cavity on described hydraulic pressure valve pocket 19 tops, and armature bottom frustum type outer rim has a spacing air gap in the axial direction with intermarginal in the frustum type of described hydrovalve cover top, and there is the gap in described armature lower end between the lower end surface with described hydraulic pressure valve pocket;
Described coil 15 is set in outside the described guide pin bushing 11;
Described magnetic conducting plate 14 is arranged on the up and down two ends of described coil 15, and described magnetic conducting plate 14 inner edges are fitted with described guide pin bushing 11 outer rims;
Described guide pin bushing 11, magnetic conducting plate 14, hydraulic pressure valve pocket 19 are the magnetic conductive metal material;
Described housing 18 is set in described coil 15 and magnetic conducting plate 14 outer rims.
Embodiment one electro-hydraulic proportional valve, guide pin bushing 11 provides axial motion stroke and circumferentially spacing for armature 12; Upper and lower magnetic conducting plate 14 plays the effect that connects guide pin bushing 11 and housing 18; Armature 12 and spool pushing block 16 interference fit are fixed together, hydraulic pressure valve pocket 19 and guide pin bushing 11 interference fit, and to hydraulic pressure valve pocket 19, armature 12 carry out bevel to joining end, hydraulic pressure valve pocket 19, armature 12 participate in the magnetic circuit magnetic conduction to joining end, produce electromagnetic force.
When coil 15 passes into electric current, armature 12 moves downward vertically, described spool pushing block 16 promotes described spool 17 and moves to spacing position from initial position vertically, armature 12 bottom frustum type outer rims diminish gradually with intermarginal gap in the hydraulic pressure valve pocket 19 top frustum types, magnetic resistance reduces, magnetic flux (magnetic line of force) by whole magnetic circuit increases, and guide pin bushing 11 can make the magnetic flux bleed-through of increase fall, thereby guarantee that armature 12 bottoms are basicly stable in armature 12 stroke range with the magnetic flux of the generation electromagnetic force of 19 of hydraulic pressure valve pockets, cone structure has guaranteed in armature 12 strokes simultaneously, magnetic circuit is constant to the adhesive area of armature 12 and hydraulic pressure valve pocket 19, make electro-hydraulic proportional valve that electromagnetic force proportional to electric current is provided in stroke range, make vertically stable moving downward of described spool 17, by the size control spool of electromagnetic push and the relative position of sleeve throttling mouth, reach the effect of pilot pressure and flow.When described armature is moved down into spacing position, armature bottom frustum type outer rim is with the intermarginal spacing air gap that exists in the axial direction in the frustum type of described hydrovalve cover top, can prevent the proportionality variation of the electric current/electromagnetic force when armature bottom frustum type outer rim is overlapped top frustum type inner edge hypotelorism with described hydrovalve, guarantee that electro-hydraulic proportional valve provides electromagnetic force proportional to electric current in stroke range.
Embodiment two
Based on embodiment one, described armature 12 is fixed with a limited ring 20 with guide pin bushing 11 inner edges of 19 of described hydraulic pressure valve pockets, and the position that described armature 12 moves down when abutting to described limited ring 20 is spacing position.Described limited ring 20 can be plastics or copper packing ring.
Embodiment three
Based on embodiment one
Described armature 12 is when spacing position, and described armature 12 lower ends are lower than the minimum diameter place of described hydraulic pressure valve pocket 19 top frustum type inner edges.
Embodiment four
Based on embodiment one, the maximum diameter place of hydraulic pressure valve pocket 19 top frustum type inner edges is higher than the upper end that is positioned at the magnetic conducting plate 14 that is arranged on the coil lower end, and the minimum diameter place of hydraulic pressure valve pocket 19 top frustum type inner edges is at up and down between the two ends of the magnetic conducting plate 14 that is arranged on the coil lower end.
Embodiment five
Based on embodiment one, armature 12 bottom frustum type outer rims, hydraulic pressure valve pocket 19 top frustum type inner edges, the angle between coaxial line is 10～30 °;
Described spacing air gap is 0.6～1.6mm;
Described armature is 0.4-2.0mm from the stroke that initial position moves to spacing position;
The minimum diameter of armature bottom frustum type outer rim is 4.0～8.0mm;
The maximum diameter of hydrovalve cover top frustum type inner edge is 7.0～9.0mm.
Embodiment six
Based on embodiment five,
Armature bottom frustum type outer rim and hydrovalve cover top frustum type inner edge, the angle between coaxial line is 11.3 °;
Described spacing air gap is 1.1mm;
Described armature is 1.3mm from the stroke that initial position moves to spacing position;
The minimum diameter of armature bottom frustum type outer rim is 7.65mm;
The maximum diameter of hydrovalve cover top frustum type inner edge is 8.3mm.
Embodiment six electro-hydraulic proportional valve, when coil passes into different electric current, in armature travel, armature with the electromagnetic force change curve of hydrovalve inner room as shown in Figure 3.
Electro-hydraulic proportional valve of the present invention utilizes armature and hydraulic pressure valve pocket to joining end conical surface angle and position, cooperates the leakage field effect of magnetic conduction guide pin bushing, realizes the steady characteristic of electromagnetic force in stroke range.Armature, hydraulic pressure valve pocket and guide pin bushing all are regular shape, and processing is simple, and required precision is low, can reduce waste of raw materials, reduce processing cost.Electro-hydraulic proportional valve of the present invention can be applicable to automatic transmission and (comprises AT(Automatic Transmission, automatic transmission), CVT(Continuously Variable Transmission, stepless speed variator), the DCT(double clutch gearbox, DoubleClutch Transmission)).
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (9)
1. an electro-hydraulic proportional valve is characterized in that, comprises coil, magnetic conducting plate, guide pin bushing, armature, spool pushing block, spool, hydraulic pressure valve pocket;
Described guide pin bushing is formed with a circular cylindrical cavity;
Described armature is tubulose, and armature middle and upper part outer rim is cylinder type, and the bottom outer rim is frustum type wide at the top and narrow at the bottom; Described armature is coaxial to be placed in the top of circular cylindrical cavity of described guide pin bushing, and can move up and down vertically;
Described spool pushing block cooperates the coaxial tube chamber lower end that is fixed on described armature by being full of;
Described hydraulic pressure valve pocket is tubulose, in the bottom of hydraulic pressure valve pocket by the coaxial circular cylindrical cavity that is fixed on described guide pin bushing of interference fit;
The inner edge on described hydrovalve cover top becomes the wide at the top and narrow at the bottom frustum type identical with the outer rim angle of described armature bottom;
Center, described hydraulic pressure valve pocket lower end surface is formed with a circular hole;
Described spool passes the circular hole of described hydraulic pressure valve pocket lower end surface, and can move up and down vertically;
When described armature is moved down into spacing position, described armature bottom is insinuated in the taper type cavity on described hydrovalve cover top, and there is spacing air gap in armature bottom frustum type outer rim in the axial direction with intermarginal in the frustum type of described hydrovalve cover top, and there is the gap in described armature lower end between the lower end surface with described hydraulic pressure valve pocket;
Described coil is set in outside the described guide pin bushing;
Described magnetic conducting plate is arranged on the up and down two ends of described coil, and described magnetic conducting plate inner edge is fitted with described guide pin bushing outer rim;
Described guide pin bushing, armature, housing, magnetic conducting plate, hydraulic pressure valve pocket are the magnetic conductive metal material.
2. electro-hydraulic proportional valve according to claim 1 is characterized in that,
Described armature is fixed with a limited ring with the guide pin bushing inner edge of described hydrovalve inner room, and the position that described armature moves down when abutting to described limited ring is spacing position.
3. electro-hydraulic proportional valve according to claim 3 is characterized in that,
Described limited ring is plastics or copper packing ring.
4. electro-hydraulic proportional valve according to claim 1 is characterized in that,
Described armature is when spacing position, and described armature lower end is lower than the minimum diameter place of described hydrovalve cover top frustum type inner edge.
5. electro-hydraulic proportional valve according to claim 1 is characterized in that,
Electro-hydraulic proportional valve also comprises housing;
Described housing is set in the outer rim of described coil and magnetic conducting plate.
6. electro-hydraulic proportional valve according to claim 1 is characterized in that,
Described armature middle and upper part outer rim is fitted with described guide pin bushing inner edge.
7. electro-hydraulic proportional valve according to claim 1 is characterized in that,
The maximum diameter place of hydrovalve cover top frustum type inner edge is higher than the upper end of the magnetic conducting plate that is arranged on the coil lower end;
The minimum diameter place of hydrovalve cover top frustum type inner edge is at up and down between the two ends of the magnetic conducting plate that is arranged on the coil lower end.
8. electro-hydraulic proportional valve according to claim 1 is characterized in that,
Described armature bottom frustum type outer rim and hydrovalve cover top frustum type inner edge, the angle between coaxial line is 10～30 °;
Described spacing air gap is 0.6～1.6mm;
Described armature is 0.4-2.0mm from the stroke that initial position moves to spacing position;
The minimum diameter of armature bottom frustum type outer rim is 4.0～8.0mm;
The maximum diameter of hydrovalve cover top frustum type inner edge is 7.0～9.0mm.
9. electro-hydraulic proportional valve according to claim 8 is characterized in that,
Armature bottom frustum type outer rim and hydrovalve cover top frustum type inner edge, the angle between coaxial line is 11.3 °;
Described spacing air gap is 1.1mm;
Described armature is 1.3mm from the stroke that initial position moves to spacing position;
The minimum diameter of armature bottom frustum type outer rim is 7.65mm;
The maximum diameter of hydrovalve cover top frustum type inner edge is 8.3mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210460980.4A CN103075560B (en) | 2012-11-15 | 2012-11-15 | Electro-hydraulic proportional valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210460980.4A CN103075560B (en) | 2012-11-15 | 2012-11-15 | Electro-hydraulic proportional valve |
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| CN103075560A true CN103075560A (en) | 2013-05-01 |
| CN103075560B CN103075560B (en) | 2016-06-01 |
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| CN201210460980.4A Active CN103075560B (en) | 2012-11-15 | 2012-11-15 | Electro-hydraulic proportional valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089072A (en) * | 2014-06-17 | 2014-10-08 | 贵州新安航空机械有限责任公司 | Electromagnetic valve core structure with enhanced electromagnetic force |
| CN110230723A (en) * | 2019-04-29 | 2019-09-13 | 海力达汽车系统（常熟）有限公司 | A kind of integrated electromagnetism header structure |
| CN114484047A (en) * | 2022-01-25 | 2022-05-13 | 江苏奕隆机电科技有限公司 | Direct-drive type continuous control air valve and flow characteristic control method thereof |
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| JPH1089522A (en) * | 1996-09-19 | 1998-04-10 | Nok Corp | Solenoid |
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| JP4158244B2 (en) * | 1998-11-02 | 2008-10-01 | 株式会社デンソー | Solenoid valve for brake control |
| CN201991581U (en) * | 2010-12-31 | 2011-09-28 | 中国航天科技集团公司第六研究院第十一研究所 | Proportional reversing valve |
| CN202203442U (en) * | 2011-07-14 | 2012-04-25 | 宜宾三江机械有限责任公司 | Two-position three-way normally closed control electromagnetic valve |
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2012
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Patent Citations (5)
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| JPH1089522A (en) * | 1996-09-19 | 1998-04-10 | Nok Corp | Solenoid |
| JP4158244B2 (en) * | 1998-11-02 | 2008-10-01 | 株式会社デンソー | Solenoid valve for brake control |
| JP2006090540A (en) * | 2004-08-26 | 2006-04-06 | Nachi Fujikoshi Corp | Solenoid valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104089072A (en) * | 2014-06-17 | 2014-10-08 | 贵州新安航空机械有限责任公司 | Electromagnetic valve core structure with enhanced electromagnetic force |
| CN110230723A (en) * | 2019-04-29 | 2019-09-13 | 海力达汽车系统（常熟）有限公司 | A kind of integrated electromagnetism header structure |
| CN114484047A (en) * | 2022-01-25 | 2022-05-13 | 江苏奕隆机电科技有限公司 | Direct-drive type continuous control air valve and flow characteristic control method thereof |
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