CN103032398B - Ball control flow jet type high-frequency electrohydraulic digital valve - Google Patents
Ball control flow jet type high-frequency electrohydraulic digital valve Download PDFInfo
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- CN103032398B CN103032398B CN201210562076.4A CN201210562076A CN103032398B CN 103032398 B CN103032398 B CN 103032398B CN 201210562076 A CN201210562076 A CN 201210562076A CN 103032398 B CN103032398 B CN 103032398B
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Abstract
The invention relates to a ball control flow jet type high-frequency electrohydraulic digital valve, which comprises a two-position three-way ball valve (18), a push rod (7) and a small steel ball (131), wherein the first small steel ball (131) is positioned on the push rod (7) and can seal a first open hole (133), a throttle (11) is arranged at the lower end of a control cavity (6), a second sealing ring (12) is positioned in a second sealing cavity (24), the first sealing ring (25) is positioned in the first sealing cavity (23), and the second sealing ring (12) is positioned at the right side of the throttle (11). The problems of complicated structure, high processing precision, high price, poor anti-pollution capability and the like of an electrohydraulic servo valve and a proportion valve are solved. The ball control flow jet type high-frequency electrohydraulic digital valve can output different flow rates according to requirements, can meet the wide requirements of industrial control, and has the advantages that the structure is simple, the hydraulic thrust is great, the response is fast, the anti-pollution capability is high, the work is reliable, and the manufacture cost is low.
Description
Technical field
The present invention relates to a kind of digital valve, be widely used in the industry equipment control fields such as metallurgical equipment, space equipment, water power, boats and ships.More particularly, it is a kind of ball control jet flow high-frequency electrohydraulic digital valve.
Background technique
Electrohydraulic control and Proportional valve all have the series product of different small-large flow at present, are a kind of analogue enlargement valves, although their technology are more ripe, complex structure, machining accuracy are high, expensive, contamination resistance is poor.Therefore, both at home and abroad all in the various types of digital valve of development, but existing digital valve flow is little, is difficult to meet commercial Application requirement.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art part, and a kind of ball control jet flow high-frequency electrohydraulic digital valve is provided.It is that a kind of flow is comparatively large and can meet the innovative high-frequency electrohydraulic digital valve that industrial control extensively requires.
The object of the invention is to be reached by following measure: ball control jet flow high-frequency electrohydraulic digital valve, it comprises two-position three way ball valve; There is through hole, push rod in the middle of described ball valve, be positioned at first small ball closing first perforate on push rod, be positioned at second small ball closing second perforate of push rod front end; There is spring assembly the front end of second described small ball, has control hole between first small ball and second small ball and communicates with through hole is vertical, and control hole connects executive component, and oil supply hole is positioned at the left end of second small ball and communicates with through hole is vertical; Oil supply hole connects high pressure oil, and oil outlet is positioned at the right-hand member of first small ball and communicates with through hole is vertical, and oil outlet takes back fuel tank; It is characterized in that it also comprises a switch electromagnet, electromagnet is had to move ferropexy on described switch electromagnet, the control small ball of valve nozzles can be fixed on electromagnet and move on iron, nozzle is positioned at the lower end controlling small ball, has the second refluxing chamber to lead to oil outlet at the right-hand member of described control small ball; Flowline is had to pass in control chamber in the lower end side of oil supply hole, described control chamber is between nozzle and through hole, little dnockout core and spring is had at push rod right-hand member, one end of described spring is near little dnockout core, the other end of its described spring abuts against on the wall of control chamber chamber, there are the first refluxing chamber, through hole and first Seal cage, second Seal cage, flow controller is had in the lower end of control chamber, second seal ring is positioned at second Seal cage, first seal ring is positioned at first Seal cage, and second seal ring is positioned at the left side of flow controller.
In technique scheme, the coil of described switch electromagnet is connected with diode.
In technique scheme, described control chamber and the second refluxing chamber are L shape structure.
Tool of the present invention has the following advantages: it adopts two-stage hydraulic control, and the first order is that ball control jet flow pilot stage and switch electromagnet form, and the second level is two-position three way ball valve.Be connected with seal ring by Seal cage both them, thus define ball control jet flow high-frequency electrohydraulic digital valve.Between switch electromagnet and ball valve, increase connecting plate, realize the first order and control the second level.Changed the thrust acted on ball valve by switch electromagnet, change the "ON" of ball valve, "Off" time, the requirement of different output flow can be met.Change the structure size of the second step valve, the application of electrohydraulic digital valve can be made more extensive.In addition, structure of the present invention is simple, and hydraulic thrust is large, and fast, contamination resistance is strong, reliable operation, low cost of manufacture in reaction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the speed regulator application schematic block diagram of the present invention in turbine-generator units.
1. switch electromagnets in Fig. 1, 2. electromagnet moves iron, 3. control small ball, 4. nozzle, 5. the first refluxing chamber, 6. control chamber, 7. push rod, 8. little dnockout core, 9. spring, 10. the second refluxing chamber, 11. flow controllers, 12. second seal rings, 131. first small balls, 132. second small balls, 133. first perforates, 134. second perforates, 14. flowlines, 15. oil outlets, 16. control holes, 17. oil supply holes, 18. ball valves, 19. spring assemblies, 20. connecting plates, 21. diodes, 22. through holes, 23. first Seal cages, 24, second Seal cage, 25, first seal ring.
Embodiment
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but it does not form limitation of the invention, only for example.Simultaneously by illustrating, advantage of the present invention will become clearly and easy understand.
Consult Fig. 1 known: ball control jet flow high-frequency electrohydraulic digital valve, it comprises the ball valve 18 of two-position three way, through hole 22 is had in the middle of described ball valve 18, push rod 7, be positioned at first small ball 131 closing first perforate 133 on push rod 7, be positioned at second small ball 132 closing second perforate 134 of push rod 7 front end, there is spring assembly 19 front end of second described small ball 132, there is control hole 16 between first small ball 131 and second small ball 132 and communicate with through hole 22 is vertical, control hole 16 connects executive component, oil supply hole 17 is positioned at the left end of second small ball 132 and communicates with through hole 22 is vertical, oil supply hole 17 connects high pressure oil, oil outlet 15 is positioned at the right-hand member of first small ball 131 and communicates with through hole 22 is vertical, oil outlet 15 takes back fuel tank, it is characterized in that it also comprises a switch electromagnet 1, having electromagnet to move iron 2 is fixed on described switch electromagnet 1, the control small ball 3 of valve nozzles 4 can be fixed on electromagnet and move on iron 2, nozzle 4 is positioned at the lower end controlling small ball 3, the second refluxing chamber 10 is had to pass into oil outlet 15 at the right-hand member of described control small ball 3, flowline is had to pass in control chamber 6 in the lower end side of oil supply hole 17, described control chamber 6 is between nozzle 4 and little dnockout core 8, little dnockout core 8 and spring 9 is had at push rod 7 right-hand member, one end of described spring 9 abuts against on little dnockout core 8, the other end of described spring 9 abuts against on the wall of control chamber 6 chamber, there is the first refluxing chamber 5, through hole 22 and first Seal cage 23, second Seal cage 24, flow controller 11 is had in the lower end of control chamber 6, second seal ring 12 is positioned at second Seal cage 24, first seal ring 25 is positioned at first Seal cage 23, second seal ring 12 is positioned at the left side of flow controller 11.
The coil of described switch electromagnet 1 is connected with diode 21.It has unilateral conduction characteristic, can realize the snap switch of switch electromagnet 1.
Described control chamber 6 and the second refluxing chamber 10 are L shape structure.It is convenient to connecting plate 20 and is connected sealing more closely with ball valve 18, makes the structure of ball control jet flow high-frequency electrohydraulic digital valve simpler simultaneously.
Working procedure of the present invention is: after microcomputer input pulse electric current, switch electromagnet 1 can promote electromagnet and move iron 2, thus promotion control small ball 3 moves down.Oil supply hole 17 connects high pressure oil, and control hole 16 connects executive component, and oil outlet 15 takes back fuel tank.High pressure oil flows into oil supply hole 17, second small ball 132 and close second perforate 134 under spring assembly 19 and oil pressure thrust to the right, and high pressure oil can only enter control chamber 6 by flow controller 11.When no pulse electric current (i=0) inputs, control small ball 3 and open, high pressure oil flows into the second refluxing chamber 10 through nozzle 4, flows into oil sump tank finally by oil outlet 15, and control hole 16 output flow is zero.When there being impulsive current i to input, switch electromagnet 1 works, downward promotion electromagnet moves iron 2, make control small ball 3 valve nozzles 4, along with high pressure oil constantly pours in control chamber 6, high pressure oil pressure in control chamber 6 increases gradually, the pressure of its high pressure oil acts on little dnockout core 8, when acting on little dnockout core 8 upward pressure and being greater than spring assembly 19 and oil pressure thrust to the right, push rod 7 moves to left, first small ball 131 closes first perforate 133, second perforate 134 is simultaneously opened, oil supply hole 17 and control hole 16 path are connected, oil supply hole 17 and oil outlet 15 path blockade, control hole 16 exports certain flow.As no pulse electric current (i=0), control small ball 3 to open, high pressure oil in control chamber 6 flows into the second refluxing chamber 10 by nozzle 4, pressure in control chamber 6 reduces, and the pressure acted on little dnockout core 8 reduces, and spring assembly 19 and oil pressure promote small ball 132 and move to right, close second perforate 134, oil supply hole 17 and control hole 16 path blockade, the fluid simultaneously in the second refluxing chamber 10 flows into oil sump tank by oil outlet 15, and control hole 16 output flow is zero.
First seal ring 25 is seal arrangement, and first seal ring 25 prevents first Seal cage 23 inner fluid from leaking and prevent the high pressure oil in control chamber 6 and first Seal cage 23 from linking up.
Second seal ring 12 is seal arrangement, and second seal ring 12 prevents second Seal cage 24 inner fluid from leaking and prevent the high pressure oil in control chamber 6 and second Seal cage 24 from linking up.
First refluxing chamber 5 is reflux line, makes the fluid remaining in first Seal cage 23 li flow into return tank.
First Seal cage 23 and second Seal cage 24 are connection sealing place of connecting plate 20 and ball valve 18, place first seal ring 25 and second seal ring 12 respectively.
Other, without the part described in detail, is prior art.
Only to be applied in the speed regulator in turbine-generator units, be explained, Fig. 2 is shown in by concrete application Block Diagram.
Microcomputer according to the machine of input frequently, net frequently and the data such as switching signal such as start, shutdown of guide vane opening signal and input, according to distinctive control strategy and operation method, the pulse width signal instruction of a modulation is sent through comprehensive computing, electrohydraulic digital valve of the present invention is exported to by becoming impulsive current after amplifier, by hydraulic conversion to servomotor, input a pulse liquid volume, servomotor produces corresponding displacement, this displacement is stepping, if width sets is very little, dutycycle is just very little, is similar to straight line.Above process is carried out continuously, just can complete the self-regulating process of regulator.
Test as follows to ball control jet flow high-frequency electrohydraulic digital valve of the present invention.
Remarks: 1, Specifeca tion speeification
2, static characteristic test check conclusion: the static characteristic of ball control jet flow high-frequency electrohydraulic digital valve is relevant with sampling period T, when T is less, because controlled pulsewidth is corresponding less, so it is also less to export control flow, vice versa.After tested, ball control jet flow high-frequency electrohydraulic digital valve has the dead band of 20% and the saturation region of 10%-20%, but these regions can be deleted in the control program of computer.This valve experimental examination result, meets the requirements completely.
3, dynamic characteristic test check conclusion: the dynamic characteristic of ball control jet flow high-frequency electrohydraulic digital valve, mainly response time.It is dynamic that this valve is always operating at that Push And Release switches fast, and it must have the sufficiently high response time, and namely the open and close process of valve is enough short, could realize control overflow.By actual measurement ball control jet flow high-frequency electrohydraulic digital valve, fast on-times ton=1.6ms, quick closedown time toff=1.5ms and ton+toff=3.1ms, meets high response speed requirement.
4, key instrument equipment and specification: 0-10mm dial gauge, 150mm vernier calliper, electronic stopclock goes out, TD4652A type scanning oscillograph, TD4011A type frequency characteristic analyzer, S-200 switch power, computer, PLC, hydraulic testing apparatus.
Claims (3)
1. ball control jet flow high-frequency electrohydraulic digital valve, it comprises the ball valve (18) of two-position three way, through hole (22) is had in the middle of described ball valve (18), push rod (7), be positioned at first small ball (131) closing first perforate (133) on push rod (7), be positioned at second small ball (132) closing second perforate (134) of push rod (7) front end, there is spring assembly (19) front end of second described small ball (132), there is control hole (16) to be positioned between first small ball (131) and second small ball (132) and communicate with through hole (22) is vertical, control hole (16) connects executive component, oil supply hole (17) is positioned at the left end of second small ball (132) and communicates with through hole (22) is vertical, oil supply hole (17) connects high pressure oil, oil outlet (15) is positioned at the right-hand member of first small ball (131) and communicates with through hole (22) is vertical, oil outlet (15) takes back fuel tank, it is characterized in that it also comprises a switch electromagnet (1), having electromagnet to move iron (2) is fixed on described switch electromagnet (1), the control small ball (3) of valve nozzles (4) electromagnet can be fixed on move on iron (2), nozzle (4) is positioned at the lower end controlling small ball (3), the second refluxing chamber (10) is had to pass into oil outlet (15) at the right-hand member of described control small ball (3), flowline is had to pass in control chamber (6) in the lower end side of oil supply hole (17), described control chamber (6) is positioned between nozzle (4) and little dnockout core (8), little dnockout core (8) and spring (9) is had at push rod (7) right-hand member, one end of described spring (9) abuts against on little dnockout core (8), the other end of described spring (9) abuts against on the wall of control chamber (6) chamber, there is the first refluxing chamber (5), through hole (22) and first Seal cage (23), second Seal cage (24), flow controller (11) is had in the lower end of control chamber (6), second seal ring (12) is positioned at second Seal cage (24), first seal ring (25) is positioned at first Seal cage (23), second seal ring (12) is positioned at the left side of flow controller (11).
2. ball control jet flow high-frequency electrohydraulic digital valve according to claim 1, the coil that it is characterized in that described switch electromagnet (1) is connected with diode (21).
3. ball control jet flow high-frequency electrohydraulic digital valve according to claim 1, is characterized in that described control chamber (6) and the second refluxing chamber (10) are L shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210562076.4A CN103032398B (en) | 2012-12-21 | 2012-12-21 | Ball control flow jet type high-frequency electrohydraulic digital valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210562076.4A CN103032398B (en) | 2012-12-21 | 2012-12-21 | Ball control flow jet type high-frequency electrohydraulic digital valve |
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| CN103032398A CN103032398A (en) | 2013-04-10 |
| CN103032398B true CN103032398B (en) | 2015-07-08 |
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| CN201210562076.4A Active CN103032398B (en) | 2012-12-21 | 2012-12-21 | Ball control flow jet type high-frequency electrohydraulic digital valve |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527543B (en) * | 2013-10-18 | 2016-01-13 | 国家电网公司 | Digital electro-hydraulic conversion pulse flow control valve |
| CN105298965B (en) * | 2015-11-16 | 2017-07-25 | 宁波克泰液压有限公司 | Automatic transmission gear shift magnetic valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103431A (en) * | 1986-05-10 | 1987-03-11 | 湖南省水利水电科学研究所 | Circular spraying servo valve for electro-hydraulic device |
| CN201554708U (en) * | 2009-10-22 | 2010-08-18 | 海门市液压件厂有限责任公司 | Pneumatic control hydraulic lifting valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3910314A (en) * | 1973-08-16 | 1975-10-07 | Koehring Co | High-speed shutoff and dump valve |
| CN2052836U (en) * | 1989-05-27 | 1990-02-14 | 浙江大学 | Proportion electromagnet type single stage servo/proportion flow valve |
| CN101476573B (en) * | 2009-01-06 | 2010-12-08 | 重庆跃进机械厂有限公司 | Integrated electrohydraulic proportional control valves |
| CN201539457U (en) * | 2009-10-29 | 2010-08-04 | 宁波市博尔法液压有限公司 | Ball-type electromagnetic directional valve |
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2012
- 2012-12-21 CN CN201210562076.4A patent/CN103032398B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103431A (en) * | 1986-05-10 | 1987-03-11 | 湖南省水利水电科学研究所 | Circular spraying servo valve for electro-hydraulic device |
| CN201554708U (en) * | 2009-10-22 | 2010-08-18 | 海门市液压件厂有限责任公司 | Pneumatic control hydraulic lifting valve |
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Inventor after: Zhou Bin Inventor after: Wang Zhi Inventor after: Liu Yongjian Inventor after: Xia Xuecai Inventor after: Tu Minggang Inventor after: Chen Fuxiang Inventor after: Wang Jianxue Inventor after: Deng Yaoli Inventor after: Liu Anping Inventor after: Li Baosheng Inventor after: Xu Xingzhai Inventor after: Liu Yu Inventor after: Hu Shiping Inventor after: Yang Guiju Inventor after: Wang Qiuhong Inventor before: Zhou Bin Inventor before: Wang Zhi Inventor before: Liu Yongjian Inventor before: Deng Yaoli Inventor before: Liu Anping Inventor before: Li Baosheng Inventor before: Xu Xingzhai Inventor before: Liu Yu Inventor before: Hu Shiping Inventor before: Yang Guiju Inventor before: Wang Qiuhong |
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Free format text: CORRECT: INVENTOR; FROM: ZHOU BIN DENG YAOLI LIU ANPING LI BAOSHENG XU XINGZHAI LIU YU HU SHIPING YANG GUIJU WANG QIUHONG WANG ZHI LIU YONGJIAN TO: ZHOU BIN DENG YAOLI LIU ANPING LI BAOSHENG XU XINGZHAI LIU YU HU SHIPING YANG GUIJU WANG QIUHONG WANG ZHI LIU YONGJIAN XIA XUECAI TU MINGGANG CHEN FUXIANG WANG JIANXUE |
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Inventor after: Zhou Bin Inventor after: Wang Zhi Inventor after: Liu Yongjian Inventor after: Xia Xuecai Inventor after: Tu Minggang Inventor after: Chen Fuxiang Inventor after: Zhou Bin, Deng Yaoli, Liu Anping, Xu Xingzhai, Liu Yu, Hu Shiping, Yang Guiju, Wang Qiuhong, Wang Zhi, Liu Yongjian, Xia Xuecai, Tu Minggang, Chen Fuxiang, Li Baosheng, Wang Jianxue, Inventor after: Deng Yaoli Inventor after: Liu Anping Inventor after: Li Baosheng Inventor after: Xu Xingzhai Inventor after: Liu Yu Inventor after: Hu Shiping Inventor after: Yang Guiju Inventor after: Wang Qiuhong Inventor before: Zhou Bin Inventor before: Wang Zhi Inventor before: Liu Yongjian Inventor before: Xia Xuecai Inventor before: Tu Minggang Inventor before: Chen Fuxiang Inventor before: Zhou Bin, Deng Yaoli, Liu Anping, Xu Xingzhai, Liu Yu, Hu Shiping, Yang Guiju, Wang Qiuhong, Wang Zhi, Liu Yongjian, Xia Xuecai, Tu Minggang, Chen Fuxiang, Li Baosheng, Wang Jianxue, Inventor before: Deng Yaoli Inventor before: Liu Anping Inventor before: Li Baosheng Inventor before: Xu Xingzhai Inventor before: Liu Yu Inventor before: Hu Shiping Inventor before: Yang Guiju Inventor before: Wang Qiuhong |
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