CN103470561A - Proportional overflow valve - Google Patents
Proportional overflow valve Download PDFInfo
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- CN103470561A CN103470561A CN2013103941587A CN201310394158A CN103470561A CN 103470561 A CN103470561 A CN 103470561A CN 2013103941587 A CN2013103941587 A CN 2013103941587A CN 201310394158 A CN201310394158 A CN 201310394158A CN 103470561 A CN103470561 A CN 103470561A
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Abstract
The invention discloses a proportional overflow valve which comprises an electromagnet, a pilot valve element, a spring, a partition, a main valve element and a valve body. The electromagnet, the pilot valve element, the spring, the partition and the main valve element are sequentially and coaxially mounted in a central hole of the valve body from top to bottom. The partition with a drainage hole at the center is in sliding fit with a valve body hole. The upper end face of the main valve element and the lower end face of the partition form a main valve back cavity. An oil outlet is formed in the lower end face of the valve body and an oil inlet is formed in the side face of the lower portion of the valve body. Evenly-distributed pilot grooves are formed in the circumference of the main valve element along the axial direction. Outlets of the pilot grooves are connected with the oil outlet in the lower end face of the valve body through an oil drainage channel in the valve body. The drainage hole in the partition serves as a damping hole and can improve stability of the pilot valve element, and differential pressure of the front and the back of the partition is transmitted onto the pilot valve element through the spring to eliminate nonlinear influences, brought by the damping hole, in the process that back cavity pressure is transmitted to the pilot valve element. The proportional overflow valve has the advantages of simple structure, good manufacturability, simple operation and the like, and proportional control of overflow pressure is realized.
Description
Technical field
The present invention relates to relief valve, especially relate to a kind of proportional pressure control valve.
Background technique
Hydraulic system is just towards the high-pressure high-flow future development, and the exploitation of hydraulic element that is directed to the high-pressure high-flow application is also very urgent.
Relief valve is the overflow by valve port, makes the pressure in controlled system and loop remain constant, realizes pressure stabilization function, is the primary element that forms hydraulic system.Major requirement to relief valve is: range of regulation is large, and override pressure is little, good stability etc.
Proportional pressure control valve is divided into two kinds of direct-acting type and leading types, wherein direct-acting type is by the electromagnet set pressure, and the difference force of relief valve spool is fully by the electromagnet balance, due to the restriction of electromagnet ouput force, can only be operated under mesolow power, can't be applied in high-pressure system.Pilot operated compound relief valve adopts the less pilot stage spool of area, greatly reduces the power output requirement of electromagnet, can be operated in high-pressure system.But existing precursor overflow valve, act directly on inlet pressure on guide's spool basically, and the pressure loss of guide's spool is large, and cavitation noise is serious, easily causes the vibration of pilot stage, thereby affect the stability of whole relief valve.
Summary of the invention
In order to solve the pressure loss and the stability problem existed in background technique, the object of the present invention is to provide a kind of proportional pressure control valve, realized that the ratio of oil pressure relief is set up.
In order to achieve the above object, the technical solution adopted in the present invention is:
The present invention includes electromagnet, guide's spool, spring, dividing plate, main valve plug, valve body; Electromagnet, guide's spool, spring, dividing plate and main valve plug coaxially are arranged in the valve body center hole from top to bottom successively, center has the dividing plate of conduction hole and valve body hole for being slidably matched, form the main valve back cavity between main valve plug upper-end surface and dividing plate lower end surface, the valve body lower end face has oil outlet, the valve body lower portion side has filler opening, the main valve plug circumferential surface has uniform first guide groove vertically, and the outlet of guide's spool is connected by the draining passage in valve body with the oil outlet of valve body lower end face.
Described first guide groove, be rectangular slot, and the degree of depth of rectangular slot is 5-10:1 with the ratio of width.
Described uniform first guide groove is 2-8.
The useful effect that the present invention has is:
Utilize first guide groove after main valve plug is opened, filler opening and main valve back cavity to be connected together, perception and the transmission of inlet pressure fluctuation have been realized, reduced the pressure acted on guide's spool simultaneously, keep balance under the acting in conjunction of guide's spool cavity pressure after electromagnetic force, main valve, main valve plug keeps balance under the pressure-acting of inlet pressure and main valve back cavity, the ratio of during application, by the regulating magnet electric current, carrying out cavity pressure after main valve is set up, thereby has realized the adjusting of inlet pressure.Conduction hole on dividing plate is as damping, can accelerate the stable of guide's spool and main valve plug, and the difference force before and after dividing plate is delivered on guide's spool by spring, eliminated rear cavity pressure that conduction hole brings to the non-linear effects in guide's spool transmittance process.Finally realized the ratio setting of inlet pressure.The present invention is simple in structure, good manufacturability, and simple operation and other advantages, realized the proportional control of oil pressure relief.
The accompanying drawing explanation
Fig. 1 is the sectional view after the present invention assembles.
Fig. 2 is that main valve plug A is to view
Fig. 3 is that the B of dividing plate is to view
In figure: 1. electromagnet, 2. guide's spool, 3. draining passage, 4. spring, 5. conduction hole, 6. main valve back cavity, 7. dividing plate, 8. first guide groove, 9. main valve plug, 10. filler opening, 11. oil outlets, 12. valve bodies.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, Figure 2, Figure 3 shows, the present invention includes electromagnet 1, guide's spool 2, draining passage 3, spring 4, conduction hole 5, main valve back cavity 6, dividing plate 7, first guide groove 8, main valve plug 9, filler opening 10, oil outlet 11, valve body 12; Electromagnet 1, guide's spool 2, spring 4, dividing plate 7 and main valve plug 9 coaxially are arranged in valve body 12 center holes from top to bottom successively, the dividing plate 7 that center has a conduction hole 5 with valve body 12 holes for being slidably matched, form main valve back cavity 6 between main valve plug 9 upper-end surfaces and dividing plate 7 lower end surfaces, valve body 12 lower end surfaces have oil outlet 11, valve body 12 lower side have filler opening 10, main valve plug 9 circumferential surfacies have uniform first guide groove 8 vertically, and the outlet of guide's spool 2 is connected by the draining passage 3 in valve body 12 with the oil outlet 11 of valve body 12 lower end surfaces.
As shown in Figure 2, first guide groove 8, be rectangular slot, and the degree of depth of rectangular slot is 5-10:1 with the ratio of width.Uniform first guide groove 8 is 2-8.
Working procedure of the present invention is as follows:
As Fig. 1, Fig. 2, shown in Fig. 3, first guide groove 8 is connected together filler opening 10 and main valve back cavity 6 after main valve plug 9 is opened, realized perception and the transmission of 10 pressure surges of relief valve filler opening, reduced the pressure acted on guide's spool 2 simultaneously, when filler opening 10 pressure increase, main valve back cavity 6 pressure raise, guide's spool 2 apertures increase, main valve back cavity 6 pressure drops thereupon, and main valve plug 9 apertures increase, excess flow increases, filler opening 10 pressure drops.Otherwise, when filler opening 10 pressure drops, main valve back cavity 6 pressure drops, guide's spool 2 apertures reduce, main valve back cavity 6 pressure rises thereupon, main valve plug 9 apertures reduce, and excess flow reduces, filler opening 10 pressure rises.Guide's spool 2 keeps balance under the acting in conjunction of electromagnetic force, main valve back cavity 6 pressure, main valve plug 9 keeps balance under the pressure-acting of filler opening 10 pressure and main valve back cavity 6, carry out the ratio setting of main valve back cavity 6 pressure during application by electromagnet 1 electric current, thereby realized the adjusting of filler opening 10 pressure.Conduction hole 5 on dividing plate 7 is as damping, can accelerate the stable of guide's spool 2, and the difference force of dividing plate 7 front and back is delivered on guide's spool 2 by spring 4, eliminated cavity pressure 6 after the main valve that conduction hole 5 brings to the non-linear effects in guide's spool 2 transmittance processs, thus the ratio of relief valve pressure set up can be safe and reliable carrying out.
The present invention finds by the research cavitation, the degree of depth of first guide groove and the ratio of width and the cavitation at first guide groove place and the uniformity of cavity pressure is closely related afterwards, when breadth depth ratio is 5-10:1, now cavitation intensity and the pressure loss reach a best proportioning, and the pressure surge of main valve plug back cavity is little.
By the research dividing plate, find, conduction hole radius on dividing plate is between 1 ~ 5mm the time, can when fluid motion, play good damping function, the dividing plate simultaneously slided can by the difference force at two ends by spring action to main valve plug, the rear cavity pressure that the effective damping pore area comes again is to the non-linear effects in guide's spool transmittance process, improved the control accuracy of pilot stage pressure, finally realized that the ratio of inlet pressure is set up.
Claims (3)
1. a proportional pressure control valve, is characterized in that: comprise electromagnet (1), guide's spool (2), spring (4), dividing plate (7), main valve plug (9), valve body (12), electromagnet (1), guide's spool (2), spring (4), dividing plate (7) and main valve plug (9) coaxially are arranged in valve body (12) center hole from top to bottom successively, the dividing plate (7) that center has conduction hole (5) with valve body (12) hole for being slidably matched, form main valve back cavity (6) between main valve plug (9) upper-end surface and dividing plate (7) lower end surface, valve body (12) lower end surface has oil outlet (11), valve body (12) lower side has filler opening (10), main valve plug (9) circumferential surface has uniform first guide groove (8) vertically, the outlet of guide's spool (2) is connected by the draining passage (3) in valve body (12) with the oil outlet (11) of valve body (12) lower end surface.
2. a kind of proportional pressure control valve according to claim 1, it is characterized in that: described first guide groove (8) is rectangular slot, the degree of depth of rectangular slot is 5-10:1 with the ratio of width.
3. a kind of proportional pressure control valve according to claim 1 is characterized in that: described uniform first guide groove (8) is 2-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310394158.7A CN103470561B (en) | 2013-09-03 | 2013-09-03 | A kind of proportional pressure control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310394158.7A CN103470561B (en) | 2013-09-03 | 2013-09-03 | A kind of proportional pressure control valve |
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| Publication Number | Publication Date |
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| CN103470561A true CN103470561A (en) | 2013-12-25 |
| CN103470561B CN103470561B (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310394158.7A Active CN103470561B (en) | 2013-09-03 | 2013-09-03 | A kind of proportional pressure control valve |
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| CN (1) | CN103470561B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838433A (en) * | 2017-03-23 | 2017-06-13 | 湖南普林斯流体设备制造有限公司 | A kind of big oral pore footpath zero leakage magnetic valve |
| CN106895037A (en) * | 2017-04-20 | 2017-06-27 | 北京航空航天大学 | Permanent magnetic spring direct-acting overflow valve based on air gap combination |
| CN107504006A (en) * | 2017-10-19 | 2017-12-22 | 宁波文泽机电技术开发有限公司 | A kind of normally opened ratio one-way flow valves |
| CN108953708A (en) * | 2018-09-21 | 2018-12-07 | 徐州工程学院 | A kind of simple thread cartridge second level precursor overflow valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3824089A1 (en) * | 1988-04-22 | 1989-11-02 | Rexroth Mannesmann Gmbh | Pilot-controlled proportional pressure-relief valve |
| DE9017096U1 (en) * | 1990-12-19 | 1992-04-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| JPH0599370A (en) * | 1991-07-15 | 1993-04-20 | Kayaba Ind Co Ltd | Balance piston type relief valve |
| JPH11311349A (en) * | 1998-04-28 | 1999-11-09 | Nabco Ltd | Hydraulic relief valve |
| CN1355391A (en) * | 2001-12-13 | 2002-06-26 | 浙江大学 | Low-noise overflow valve with shaped flow channel |
| CN101124525A (en) * | 2005-02-11 | 2008-02-13 | Hydac流体技术有限公司 | Valve, especially proportional pressure control valve |
| CN201322117Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | Proportional overflow valve |
-
2013
- 2013-09-03 CN CN201310394158.7A patent/CN103470561B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3824089A1 (en) * | 1988-04-22 | 1989-11-02 | Rexroth Mannesmann Gmbh | Pilot-controlled proportional pressure-relief valve |
| DE9017096U1 (en) * | 1990-12-19 | 1992-04-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
| JPH0599370A (en) * | 1991-07-15 | 1993-04-20 | Kayaba Ind Co Ltd | Balance piston type relief valve |
| JPH11311349A (en) * | 1998-04-28 | 1999-11-09 | Nabco Ltd | Hydraulic relief valve |
| CN1355391A (en) * | 2001-12-13 | 2002-06-26 | 浙江大学 | Low-noise overflow valve with shaped flow channel |
| CN101124525A (en) * | 2005-02-11 | 2008-02-13 | Hydac流体技术有限公司 | Valve, especially proportional pressure control valve |
| CN201322117Y (en) * | 2008-08-08 | 2009-10-07 | 宁波市鄞州通力液压电器厂 | Proportional overflow valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838433A (en) * | 2017-03-23 | 2017-06-13 | 湖南普林斯流体设备制造有限公司 | A kind of big oral pore footpath zero leakage magnetic valve |
| CN106895037A (en) * | 2017-04-20 | 2017-06-27 | 北京航空航天大学 | Permanent magnetic spring direct-acting overflow valve based on air gap combination |
| CN106895037B (en) * | 2017-04-20 | 2018-07-13 | 北京航空航天大学 | Permanent magnetic spring direct-acting overflow valve based on air gap combination |
| CN107504006A (en) * | 2017-10-19 | 2017-12-22 | 宁波文泽机电技术开发有限公司 | A kind of normally opened ratio one-way flow valves |
| CN107504006B (en) * | 2017-10-19 | 2019-07-09 | 杭州富阳中亚阀业有限公司 | A kind of normally opened ratio one-way flow valves |
| CN108953708A (en) * | 2018-09-21 | 2018-12-07 | 徐州工程学院 | A kind of simple thread cartridge second level precursor overflow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103470561B (en) | 2015-10-21 |
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