CN103075560B - Electro-hydraulic proportional valve - Google Patents
Electro-hydraulic proportional valve Download PDFInfo
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- CN103075560B CN103075560B CN201210460980.4A CN201210460980A CN103075560B CN 103075560 B CN103075560 B CN 103075560B CN 201210460980 A CN201210460980 A CN 201210460980A CN 103075560 B CN103075560 B CN 103075560B
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Abstract
The present invention discloses a kind of electro-hydraulic proportional valve, and it comprises coil, magnetic conduction sheet, guide pin bushing, armature, spool pushing block, spool, hydraulic pressure valve pocket; In armature, top outer rim is cylinder shape, and bottom outer rim is frustum type; Armature is placed in the top of the circular cylindrical cavity of guide pin bushing and can move up and down vertically; Spool pushing block is fixed on the lower end in pipe chamber of armature; Hydraulic pressure valve pocket is fixed in the bottom of the circular cylindrical cavity of guide pin bushing; The interior edge on hydraulicvalve cover top becomes the frustum type identical with the outer rim angle of armature bottom; When armature is moved down into restraining position from initiating terminal, armature bottom is insinuated in the taper type cavity on hydraulicvalve cover top, and armature bottom frustum type outer rim is overlapped in the frustum type of top with hydraulicvalve and be there is spacing air gap in the axial direction between edge, and the lower end of armature exists gap between the lower surface with hydraulic pressure valve pocket. The electro-hydraulic proportional valve of the present invention, major part regular shape, processing is simple, and accuracy requirement is low, can reduce waste of raw materials, reduces tooling cost.
Description
Technical field
The present invention relates to a kind of electro-hydraulic proportional valve.
Background technology
Electro-hydraulic proportional valve be in valve electromagnet module according to input electric current signal produce corresponding actions, make operating valve spool produce displacement, port size change and with this complete the pressure proportional to received current, flow export element. Spool displacement can also be fed back with the form of machinery, hydraulic pressure or electricity. Due to electro-hydraulic proportional valve have form wide variety, easily composition use electrically and computer control various electrohydraulic systems, control accuracy height, install and use flexibly and many-sided advantage such as contamination resistance is strong, therefore Application Areas is widened day by day.
Electro-hydraulic proportional valve, is accurately designed by the shape and size of the electromagnet module in valve, the electromagnetic force making electro-hydraulic proportional valve provide proportional to electric current in stroke range, reaches the object that hydraulic control module exports the pressure proportional to input voltage or flow.
A kind of common electro-hydraulic proportional valve as shown in Figure 1, comprises housing 18, coil 15, magnetic conduction sheet 14, guide pin bushing 11, armature 12, spool pushing block 16, spool 17;
Described armature 12 is circle tubulose, and described spool pushing block 16 is fixed in described tubulose armature 12 times 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 lower surface is formed with a circular hole, and the guide pin bushing sidewall outer rim near lower surface is formed with a V-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 described guide pin bushing 11;
Described magnetic conduction sheet 14 is arranged on the two ends up and down of described coil 15, and described magnetic conduction sheet 14 contacts with described guide pin bushing 11;
Described guide pin bushing 11, magnetic conduction sheet 14 are magnetic conductive metal material;
Described spool 17 is through the circular hole of described guide pin bushing 14 lower surface.
Electro-hydraulic proportional valve shown in Fig. 1, when coil leads to into electric current, when armature moves downward vertically, described spool pushing block promotes described spool to move downward vertically, gap between armature and guide lower surface diminishes gradually, magnetic resistance reduces, increased by the magnetic flux of whole magnetic circuit, and the magnetic flux increased can leak away from the V-groove being formed at guide pin bushing sidewall outer rim, thus ensure that the magnetic flux of the generation electromagnetic force between armature and guide lower surface is substantially stable within the scope of armature travel, make the electromagnetic force that electro-hydraulic proportional valve provides proportional to electric current in stroke range, described spool is stablized vertically move downward.
Electro-hydraulic proportional valve shown in Fig. 1, guide pin bushing sidewall outer rim forms V-groove, complex structure, requirement on machining accuracy height, and there is waste of raw materials phenomenon due to needs.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of electro-hydraulic proportional valve, major part regular shape, and processing is simple, and accuracy requirement is low, can reduce waste of raw materials, reduces tooling cost.
For solving the problems of the technologies described above, the electro-hydraulic proportional valve of the present invention, it comprises coil, magnetic conduction sheet, 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 in armature, top outer rim is cylinder shape, and bottom outer rim is frustum type wide at the top and narrow at the bottom; Described armature is coaxially placed in the top of the circular cylindrical cavity of described guide pin bushing, and can move up and down vertically;
Described spool pushing block, logical shrink-fit is coaxially fixed on the lower end in pipe chamber of described armature;
Described hydraulic pressure valve pocket is tubulose, and hydraulic pressure valve pocket is coaxially fixed in the bottom of the circular cylindrical cavity of described guide pin bushing by shrink-fit;
The interior edge on described hydraulicvalve 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 surface is formed with a circular hole;
Described spool, through the circular hole of described hydraulic pressure valve pocket lower surface, and can move up and down vertically;
When described armature is moved down into restraining position, described armature bottom is insinuated in the taper type cavity on described hydraulicvalve cover top, and armature bottom frustum type outer rim is overlapped in the frustum type of top with described hydraulicvalve and is had spacing air gap in the axial direction between edge, and the lower end of described armature exists gap between the lower surface with described hydraulic pressure valve pocket;
Described coil, is set in outside described guide pin bushing;
Described magnetic conduction sheet, is arranged on the two ends up and down of described coil, and in described magnetic conduction sheet, edge is fitted with described guide pin bushing outer rim;
Described guide pin bushing, magnetic conduction sheet, hydraulic pressure valve pocket are magnetic conductive metal material.
Preferably, described armature, with edge in the guide pin bushing of described hydraulicvalve inner room, is fixed with a spacing ring, and it is restraining position that described armature moves down position when abutting to described spacing ring.
Preferably, described spacing ring is plastics or copper packing ring.
Preferably, described armature is when restraining position, and the lower end of described armature overlaps the minimum diameter place of edge in the frustum type of top lower than described hydraulicvalve.
Preferably, electro-hydraulic proportional valve also comprises housing; Described housing, is set in the outer rim of described coil and magnetic conduction sheet.
Preferably, in described armature, top outer rim is fitted with edge in described guide pin bushing.
Preferably, hydraulicvalve overlaps the upper end of maximum diameter place higher than the magnetic conduction sheet being arranged on the lower end of coil of edge in the frustum type of top;
Up and down between the two ends of magnetic conduction sheet that in hydraulicvalve cover top frustum type, the minimum diameter place of edge is being arranged under coil end.
Preferably, described armature bottom frustum type outer rim and hydraulicvalve overlap edge in the frustum type of top, and the angle between coaxial line is 10��30 ��;
Described spacing air gap is 0.6��1.6mm;
The stroke that described armature moves to restraining position from starting position is 0.4-2.0mm;
The minimum diameter of armature bottom frustum type outer rim is 4.0��8.0mm;
In the frustum type of hydraulicvalve cover top, the maximum diameter of edge is 7.0��9.0mm.
The electro-hydraulic proportional valve of the present invention, utilizes armature and hydraulic pressure valve pocket to joining end frustoconical bevel angle and position, coordinates the leakage field effect leading magnetic conductance cover, it is achieved the steady characteristic of electromagnetic force in stroke range. Armature, hydraulic pressure valve pocket and guide pin bushing are all regular shape, and processing is simple, and accuracy requirement is low, can reduce waste of raw materials, reduce tooling cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the present invention, below the accompanying drawing to be used required for the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is existing a kind of electro-hydraulic proportional valve schematic diagram;
Fig. 2 is the electro-hydraulic proportional valve one embodiment 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 hydraulicvalve inner room.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the present invention is carried out clear, complete description, it is clear that described embodiment is a part of embodiment of the present invention, instead of whole embodiments. Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
Embodiment one
Electro-hydraulic proportional valve as shown in Figure 2, comprises housing 18, coil 15, magnetic conduction sheet 14, guide pin bushing 11, armature 12, spool pushing block 16, spool 17, hydraulic pressure valve pocket 19;
Described guide pin bushing 11, is formed with a circular cylindrical cavity;
Described armature 12 is tubulose, and in armature, top outer rim is cylinder shape, and bottom outer rim is frustum type wide at the top and narrow at the bottom;
Described armature 12, is coaxially placed in the top of circular cylindrical cavity of described guide pin bushing 11, and can move up and down vertically; Preferably, in described armature, top outer rim is fitted with edge in described guide pin bushing;
Described spool pushing block 16, is coaxially fixed on the lower end in pipe chamber of described armature by shrink-fit;
Described hydraulic pressure valve pocket 19 is tubulose, and hydraulic pressure valve pocket 19 is coaxially fixed in the bottom of the circular cylindrical cavity of described guide pin bushing 11 by shrink-fit;
The interior edge on described hydraulic pressure valve pocket 19 top becomes the wide at the top and narrow at the bottom frustum type identical with the outer rim angle of described armature 12 bottom;
Center, described hydraulic pressure valve pocket 19 lower surface is formed with a circular hole;
Described spool 17, through the circular hole of described hydraulic pressure valve pocket 19 lower surface, and can move up and down vertically;
When described coil energization stream, when described armature 12 is moved down into restraining position, described armature 12 bottom is insinuated in the taper type cavity on described hydraulic pressure valve pocket 19 top, and armature bottom frustum type outer rim is overlapped in the frustum type of top with described hydraulicvalve and is had spacing air gap in the axial direction between edge, and the lower end of described armature exists gap between the lower surface with described hydraulic pressure valve pocket;
Described coil 15, is set in outside described guide pin bushing 11;
Described magnetic conduction sheet 14, is arranged on the two ends up and down of described coil 15, and in described magnetic conduction sheet 14, edge is fitted with described guide pin bushing 11 outer rim;
Described guide pin bushing 11, magnetic conduction sheet 14, hydraulic pressure valve pocket 19 are magnetic conductive metal material;
Described housing 18, is set in described coil 15 and magnetic conduction sheet 14 outer rim.
The electro-hydraulic proportional valve of embodiment one, guide pin bushing 11 provide axial motion stroke for armature 12 and circumference spacing; Upper and lower magnetic conduction sheet 14 plays the effect connecting guide pin bushing 11 and housing 18; Armature 12 and spool pushing block 16 shrink-fit are fixed together, hydraulic pressure valve pocket 19 and guide pin bushing 11 shrink-fit, and to hydraulic pressure valve pocket 19, armature 12 carry out cone face process to joining end, the participating in magnetic circuit lead magnetic to joining end of hydraulic pressure valve pocket 19, armature 12, produces electromagnetic force.
When coil 15 leads to into electric current, armature 12 moves downward vertically, described spool pushing block 16 promotes described spool 17 to move from starting position to restraining position vertically, armature 12 bottom frustum type outer rim diminishes gradually with gap between edge in the frustum type of hydraulic pressure valve pocket 19 top, magnetic resistance reduces, increased by the magnetic flux (magnetic line of force) of whole magnetic circuit, and the magnetic flux bleed-through that guide pin bushing 11 can make increase is fallen, thus ensure that the magnetic flux of armature 12 bottom with the generation electromagnetic force between hydraulic pressure valve pocket 19 is substantially stable in armature 12 stroke range, cone structure ensure that in armature 12 stroke simultaneously, magnetic circuit is constant to the adhesive area of armature 12 and hydraulic pressure valve pocket 19, make the electromagnetic force that electro-hydraulic proportional valve provides proportional to electric current in stroke range, described spool 17 is stablized vertically move downward, by the relative position of the size of electromagnetic push control spool and sleeve throttling mouth, reach the effect of control pressure and flow. when described armature is moved down into restraining position, armature bottom frustum type outer rim overlaps in the frustum type of top the spacing air gap existed in the axial direction between edge with described hydraulicvalve, the proportionality of electric current/electromagnetic force when edge distance is crossed near in armature bottom frustum type outer rim is with described hydraulicvalve cover top frustum type can be prevented to be deteriorated, it is ensured that electro-hydraulic proportional valve provides the electromagnetic force proportional to electric current in stroke range.
Embodiment two
Based on embodiment one, described armature 12, with edge in the guide pin bushing 11 between described hydraulic pressure valve pocket 19, is fixed with a spacing ring 20, and it is restraining position that described armature 12 moves down position when abutting to described spacing ring 20. Described spacing ring 20 can be plastics or copper packing ring.
Embodiment three
Based on embodiment one
Described armature 12 is when restraining position, and described armature 12 times ends are lower than the minimum diameter place of edge in the frustum type of described hydraulic pressure valve pocket 19 top.
Embodiment four
Based on embodiment one, in the frustum type of hydraulic pressure valve pocket 19 top, the maximum diameter place of edge is higher than the upper end being positioned at the magnetic conduction sheet 14 being arranged on the lower end of coil, in the frustum type of hydraulic pressure valve pocket 19 top the minimum diameter place of edge be arranged under coil end up and down between two ends of magnetic conduction sheet 14.
Embodiment five
Based on embodiment one, edge in armature 12 bottom frustum type outer rim, hydraulic pressure valve pocket 19 top frustum type, the angle between coaxial line is 10��30 ��;
Described spacing air gap is 0.6��1.6mm;
The stroke that described armature moves to restraining position from starting position is 0.4-2.0mm;
The minimum diameter of armature bottom frustum type outer rim is 4.0��8.0mm;
In the frustum type of hydraulicvalve cover top, the maximum diameter of edge is 7.0��9.0mm.
Embodiment six
Based on embodiment five,
Armature bottom frustum type outer rim and hydraulicvalve overlap edge in the frustum type of top, and the angle between coaxial line is 11.3 ��;
Described spacing air gap is 1.1mm;
The stroke that described armature moves to restraining position from starting position is 1.3mm;
The minimum diameter of armature bottom frustum type outer rim is 7.65mm;
In the frustum type of hydraulicvalve cover top, the maximum diameter of edge is 8.3mm.
The electro-hydraulic proportional valve of embodiment six, when leading to into different electric current when coil, in armature travel, armature with hydraulicvalve inner room electromagnetic force change curve as shown in Figure 3.
The electro-hydraulic proportional valve of the present invention, utilizes armature and hydraulic pressure valve pocket to joining end frustoconical bevel angle and position, coordinates the leakage field effect leading magnetic conductance cover, it is achieved the steady characteristic of electromagnetic force in stroke range. Armature, hydraulic pressure valve pocket and guide pin bushing are all regular shape, and processing is simple, and accuracy requirement is low, can reduce waste of raw materials, reduce tooling cost. The electro-hydraulic proportional valve of the present invention can be applicable to automatic transmission and (comprises AT(AutomaticTransmission, automatic transmission), CVT(ContinuouslyVariableTransmission, buncher), DCT(double clutch gearbox, DoubleClutchTransmission)).
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment of making, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. an electro-hydraulic proportional valve, it is characterised in that, comprise housing, coil, magnetic conduction sheet, 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 in armature, top outer rim is cylinder shape, and bottom outer rim is frustum type wide at the top and narrow at the bottom; Described armature is coaxially placed in the top of the circular cylindrical cavity of described guide pin bushing, and can move up and down vertically;
Described spool pushing block, is coaxially fixed on the lower end in pipe chamber of described armature by shrink-fit;
Described hydraulic pressure valve pocket is tubulose, and hydraulic pressure valve pocket is coaxially fixed in the bottom of the circular cylindrical cavity of described guide pin bushing by shrink-fit;
The interior edge on described hydraulicvalve 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 surface is formed with a circular hole;
Described spool, through the circular hole of described hydraulic pressure valve pocket lower surface, and can move up and down vertically;
When described armature is moved down into restraining position, described armature bottom is insinuated in the frustum type cavity on described hydraulicvalve cover top, and armature bottom frustum type outer rim is overlapped in the frustum type of top with described hydraulicvalve and be there is spacing air gap in the axial direction between edge, and the lower end of described armature exists gap between the lower surface with described hydraulic pressure valve pocket;
Described coil, is set in outside described guide pin bushing;
Described magnetic conduction sheet, is arranged on the two ends up and down of described coil, and in described magnetic conduction sheet, edge is fitted with described guide pin bushing outer rim;
Described housing, is set in the outer rim of described coil and magnetic conduction sheet;
Described guide pin bushing, armature, housing, magnetic conduction sheet, hydraulic pressure valve pocket are magnetic conductive metal material;
Described armature, with edge in the guide pin bushing of described hydraulicvalve inner room, is fixed with a spacing ring, and it is restraining position that described armature moves down position when abutting to described spacing ring.
2. electro-hydraulic proportional valve according to claim 1, it is characterised in that,
Described spacing ring is plastics or copper packing ring.
3. electro-hydraulic proportional valve according to claim 1, it is characterised in that,
Described armature is when restraining position, and the lower end of described armature overlaps the minimum diameter place of edge in the frustum type of top lower than described hydraulicvalve.
4. electro-hydraulic proportional valve according to claim 1, it is characterised in that,
In described armature, top outer rim is fitted with edge in described guide pin bushing.
5. electro-hydraulic proportional valve according to claim 1, it is characterised in that,
In the frustum type of hydraulicvalve cover top, the maximum diameter place of edge is higher than the upper end of the magnetic conduction sheet being arranged on the lower end of coil;
Up and down between the two ends of magnetic conduction sheet that in hydraulicvalve cover top frustum type, the minimum diameter place of edge is being arranged under coil end.
6. electro-hydraulic proportional valve according to claim 1, it is characterised in that,
Described armature bottom frustum type outer rim and hydraulicvalve overlap edge in the frustum type of top, and the angle between coaxial line is 10��30 ��;
Described spacing air gap is 0.6��1.6mm;
The stroke that described armature moves to restraining position from starting position is 0.4-2.0mm;
The minimum diameter of armature bottom frustum type outer rim is 4.0��8.0mm;
In the frustum type of hydraulicvalve cover top, the maximum diameter of edge is 7.0��9.0mm.
7. electro-hydraulic proportional valve according to claim 6, it is characterised in that,
Armature bottom frustum type outer rim and hydraulicvalve overlap edge in the frustum type of top, and the angle between coaxial line is 11.3 ��;
Described spacing air gap is 1.1mm;
The stroke that described armature moves to restraining position from starting position is 1.3mm;
The minimum diameter of armature bottom frustum type outer rim is 7.65mm;
In the frustum type of hydraulicvalve cover top, the maximum diameter of edge is 8.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210460980.4A CN103075560B (en) | 2012-11-15 | 2012-11-15 | Electro-hydraulic proportional valve |
Applications Claiming Priority (1)
| 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 CN103075560A (en) | 2013-05-01 |
| CN103075560B true CN103075560B (en) | 2016-06-01 |
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Families Citing this family (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***（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 |
| JP2006090540A (en) * | 2004-08-26 | 2006-04-06 | Nachi Fujikoshi Corp | Solenoid valve |
| 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
- 2012-11-15 CN CN201210460980.4A patent/CN103075560B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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