CN101334053A - Direct action type electrohydraulic proportional control valve - Google Patents
Direct action type electrohydraulic proportional control valve Download PDFInfo
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- CN101334053A CN101334053A CNA2008100632684A CN200810063268A CN101334053A CN 101334053 A CN101334053 A CN 101334053A CN A2008100632684 A CNA2008100632684 A CN A2008100632684A CN 200810063268 A CN200810063268 A CN 200810063268A CN 101334053 A CN101334053 A CN 101334053A
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- rheological fluid
- spool
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Abstract
The invention relates to a direct drive type electro-hydraulic proportion control valve. The pollution-resistant capacity of the prior hydraulic proportion control valve is weak, and the response is not quick. The direct drive type electro-hydraulic proportion control valve comprises a magneto-rheological fluid control unit and a control valve. Two magneto-rheological fluid holes communicated with a valve core hole are vertically arranged at the two ends of the valve core hole in the valve body of the control valve, electromagnetic coils are arranged at the two ends of each magneto-rheological fluid hole, and the two ends of the valve core are respectively and movably connected with the valve body through a centering spring arranged in magneto-rheological fluid hole. The magneto-rheological fluid control unit comprises a case body in which magneto-rheological fluid is filled, the inlet opening of a hydraulic pump is communicated with the case body, the outlet opening of the hydraulic pump is communicated with one end of the two magneto-rheological fluid holes through an inflow pipeline, and the other ends of the two magneto-rheological fluid holes are communicated with the case body through an outflow pipeline. The direct drive type electro-hydraulic proportion control valve of the invention ensures that the strong output force and a high working frequency can be obtained, and has the advantages of high frequency response, simple structure and large flow.
Description
Technical field
The invention belongs to the hydraulic control valve technical field, be specifically related to the direct action type electrohydraulic proportional control valve that a kind of magneto-rheological fluid drives.
Background technique
Hydraulic control valve is one of core parts of hydraulic system, and in hydraulic system, the pressure of hydraulic control valve control system, flow and direction realize control requirements such as executive component displacement, speed, power.The performance of hydraulic control valve has a direct impact static characteristic, dynamic characteristic and the reliability of hydraulic system.
Development along with industrial technology, the flow of hydraulic system is increasing, the requirement of frequency response is also more and more higher, and traditional hydraulic proportional/servovalve has adopted torque motor or proportion electro-magnet as electromechanical converter, is subjected to the less and operating frequency restriction of ouput force.Present hydraulic proportional/servovalve is the multistage valve of first guide structure substantially, and contamination resistance is poor, responds soon inadequately, and particularly the large-capacity valve frequency response is low.Therefore hydraulic system is rung direction to high-speed high frequency and is developed, and reliable in action, contamination resistance are strong, the easy high frequency sound large-capacity valve of control is a urgent problem.
Development along with new material technology, intellectual material comes into one's own in the application of fluid transmission field, magneto-rheological fluid particularly, under the action of a magnetic field, can solid-state and liquid between take place to change rapidly, have that yield stress is big, response is fast, operating voltage is low and to polluting advantages such as insensitive, the personnel that are studied gradually pay attention to.The design of magnetorheological control valve mostly is direct with the working medium of magnetic flow liquid as system in Hydrauservo System at present, forms hydraulic control system.And the working medium of present hydraulic control component design is all kinds of mineral hydraulic oil, and its performance characteristic will greatly change when working medium is magnetic flow liquid, for control brings very big difficulty.
Summary of the invention
The direct action type electrohydraulic proportional control valve that provides a kind of magneto-rheological fluid to drive is provided at the deficiencies in the prior art.The proportional control valve that the present invention proposes has adopted the magneto-rheological fluid system that valve core driving force is provided, and has effectively promoted the electromechanical converter driving force, and it is fast to guarantee to drive large diameter direct action type proportional valve core and active force switching frequency.
The present invention includes magneto-rheological fluid control unit and control valve.
Control valve comprises valve body and spool.
Laterally have spool bore in the valve body, have three grooves along the circumference of the sidewall of spool bore; Vertically have five oil circuits in the valve body: an end of three oil circuits is communicated with three grooves respectively, and the other end communicates with the external world respectively, is the oil-feed oil circuit in the middle of wherein, both sides be fuel-displaced oil circuit; The two other oil circuit is the load oil circuit, the two ends of groove in the middle of being arranged on, and two load oil circuit one ends directly are communicated with spool bore respectively, and the other end communicates with the external world respectively.
Spool comprises the spool body of cylinder type, is provided with three convex shoulders along the circumference of spool body sidewall.
Spool is arranged in the spool bore, and three convex shoulders and the spool bore of spool closely cooperate, and corresponding with three groove positions.
Vertically have two magneto-rheological fluid holes of running through valve body in the valve body, the magneto-rheological fluid hole is arranged on the two ends of spool bore, and is communicated with spool bore.The two ends in each magneto-rheological fluid hole are provided with electromagnetic coil along circumference.The two ends of spool flexibly connect by centralizing spring and the valve body that is arranged in the magneto-rheological fluid hole respectively.
The casing of dress magneto-rheological fluid in the magneto-rheological fluid control unit comprises, the import of oil hydraulic pump is communicated with casing, the hydraulic pressure delivery side of pump is communicated with an end in two magneto-rheological fluid holes by flowing into pipeline, and the other end in two magneto-rheological fluid holes is communicated with casing by flowing out pipeline.Flow into pipeline and be provided with one-way valve and relief valve.
The invention has the beneficial effects as follows: owing to adopt control magneto-rheological fluid state to control hydraulic pressure half-bridge delivery pressure, thus the control valve core movement can obtain big ouput force and high workload frequency.This valve has frequency response height, simple in structure, advantage that flow is big, can be widely used on high frequency sound and the large hydraulic equipment.
Description of drawings
Fig. 1 is the structural representation among the present invention;
Fig. 2 is the working state schematic representation when not applying electric current on all electromagnetic coils among Fig. 1;
Fig. 3 is for applying the working state schematic representation behind the electric current on the electromagnetic coil in magneto-rheological fluid hole among Fig. 1;
Fig. 4 is for applying the working state schematic representation behind the electric current on the electromagnetic coil in another magneto-rheological fluid hole among Fig. 1.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1, direct action type electrohydraulic proportional control valve comprises magneto-rheological fluid control unit and control valve.Wherein control valve comprises valve body 17 and spool.
Laterally have spool bore 14 in the valve body 17, have three grooves 16 along the circumference of the sidewall of spool bore 14; Vertically have five oil circuits in the valve body 17: an end of three oil circuits is communicated with three grooves 16 respectively, and the other end communicates with the external world respectively, is oil-feed oil circuit 15 in the middle of wherein, both sides be fuel-displaced oil circuit 13-1 and 13-2; The two other oil circuit is load oil circuit 9-1 and 9-2, the two ends of groove in the middle of being arranged on, and two load oil circuit one ends directly are communicated with spool bore 14 respectively, and the other end communicates with the external world respectively.
Spool comprises the spool body 10 of cylinder type, is provided with three convex shoulders 8 along the circumference of spool body 10 sidewalls.
Spool is arranged in the spool bore 14, and three convex shoulders 8 and the spool bore 14 of spool closely cooperate, and corresponding with three groove 16 positions.
Vertically have two magneto-rheological fluid hole 12-1 and 12-2 that run through valve body in the valve body 17, be separately positioned on the two ends of spool bore 14, and be communicated with spool bore 14.The two ends in each magneto-rheological fluid hole are provided with electromagnetic coil 7 along circumference.The two ends of spool are respectively by being arranged on centralizing spring 11-1 and 11-2 and valve body 17 flexible connections in the magneto-rheological fluid hole.
The casing 2 of dress magneto-rheological fluid 1 in the magneto-rheological fluid control unit comprises, the import of oil hydraulic pump 3 is communicated with casing 1, the outlet of oil hydraulic pump 3 is communicated with the end of two magneto-rheological fluid hole 12-1 and 12-2 by flowing into pipeline 6, and the other end of two magneto-rheological fluid hole 12-1 and 12-2 passes through outflow pipeline 18 and is communicated with casing 2.Flow into pipeline 6 and be provided with one-way valve 4 and relief valve 5.
When system works, oil hydraulic pump 3 work make magneto-rheological fluid produce pressure, and this system pressure is set up by relief valve 5.When all electromagnetic coils 7 all are not subjected to the function of current, promptly there is not the action of a magnetic field on magneto-rheological fluid, magneto-rheological fluid will keep the original liquid state, the pressure that acts on control valve spool two ends this moment equates, the spool stress balance, remain on the neutral position as shown in Figure 2, this moment, the control valve output flow was zero.
When applying electric current on electromagnetic coil 7-1 the time, magneto-rheological fluid will be from liquid state to solid state transformation, flow resistance increases, make the pressure of spool left side hydraulic pressure half-bridge output point raise, and other coils do not have the function of current, state to magneto-rheological fluid does not exert an influence, the pressure of right side hydraulic pressure half-bridge output point is constant, the pressure of promptly controlling the spool right side is constant, under this unbalanced pressure effect, spool moves right, centralizing spring 11-1 elongation, centralizing spring 11-2 compression, valve element position as shown in Figure 3 at this moment.Pressure oil is flowed into by oil-feed oil circuit 15, the spool of flowing through, and flow out to executive component through load oil circuit 9-1; The fluid that is flowed out by executive component is through load oil circuit 9-2 inflow control valve, the spool and flow out through fuel-displaced pipeline 13-2 of flowing through.
When applying electric current on electromagnetic coil 7-2 the time, magneto-rheological fluid will be from liquid state to solid state transformation, flow resistance increases, make the pressure of spool right side hydraulic pressure half-bridge output point raise, and other coils do not have the function of current, state to magneto-rheological fluid does not exert an influence, the pressure of left side hydraulic pressure half-bridge output point is constant, the pressure of promptly controlling the spool left side is constant, under this unbalanced pressure effect, spool is moved to the left, centralizing spring 11-1 compression, centralizing spring 11-2 elongation, valve element position as shown in Figure 4 at this moment.Pressure oil is flowed into by oil-feed oil circuit 15, the spool of flowing through, and flow out to executive component through load oil circuit 9-2; The fluid that is flowed out by executive component is through load oil circuit 9-1 inflow control valve, the spool and flow out through fuel-displaced pipeline 13-1 of flowing through.
Claims (1)
1, direct action type electrohydraulic proportional control valve comprises magneto-rheological fluid control unit and control valve, it is characterized in that:
Described control valve comprises valve body and spool;
Laterally have spool bore in the valve body, have three grooves along the circumference of the sidewall of spool bore; Vertically have five oil circuits in the valve body: an end of three oil circuits is communicated with three grooves respectively, and the other end communicates with the external world respectively, is the oil-feed oil circuit in the middle of wherein, both sides be fuel-displaced oil circuit; The two other oil circuit is the load oil circuit, the two ends of groove in the middle of being arranged on, and two load oil circuit one ends directly are communicated with spool bore respectively, and the other end communicates with the external world respectively;
Spool comprises the spool body of cylinder type, is provided with three convex shoulders along the circumference of spool body sidewall; Spool is arranged in the spool bore, and three convex shoulders and the spool bore of spool closely cooperate, and corresponding with three groove positions;
Vertically have two magneto-rheological fluid holes of running through valve body in the valve body, the magneto-rheological fluid hole is arranged on the two ends of spool bore, and is communicated with spool bore; The two ends in each magneto-rheological fluid hole are provided with electromagnetic coil along circumference; The two ends of spool flexibly connect by centralizing spring and the valve body that is arranged in the magneto-rheological fluid hole respectively;
The casing of dress magneto-rheological fluid in described magneto-rheological fluid control unit comprises, the import of oil hydraulic pump is communicated with casing, the hydraulic pressure delivery side of pump is communicated with an end in two magneto-rheological fluid holes by flowing into pipeline, and the other end in two magneto-rheological fluid holes is communicated with casing by flowing out pipeline; Flow into pipeline and be provided with one-way valve and relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100632684A CN101334053A (en) | 2008-07-29 | 2008-07-29 | Direct action type electrohydraulic proportional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100632684A CN101334053A (en) | 2008-07-29 | 2008-07-29 | Direct action type electrohydraulic proportional control valve |
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| CN101334053A true CN101334053A (en) | 2008-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100632684A Pending CN101334053A (en) | 2008-07-29 | 2008-07-29 | Direct action type electrohydraulic proportional control valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267159A (en) * | 2013-05-05 | 2013-08-28 | 吉林大学 | Double-acting magneto-rheological pressure and flow control valve |
| CN110701371A (en) * | 2015-08-03 | 2020-01-17 | 赛峰航空助推器有限公司 | Fluid valve |
-
2008
- 2008-07-29 CN CNA2008100632684A patent/CN101334053A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267159A (en) * | 2013-05-05 | 2013-08-28 | 吉林大学 | Double-acting magneto-rheological pressure and flow control valve |
| CN110701371A (en) * | 2015-08-03 | 2020-01-17 | 赛峰航空助推器有限公司 | Fluid valve |
| CN110725995A (en) * | 2015-08-03 | 2020-01-24 | 赛峰航空助推器有限公司 | Fluid valve |
| CN110725994A (en) * | 2015-08-03 | 2020-01-24 | 赛峰航空助推器有限公司 | Fluid valve |
| CN110725995B (en) * | 2015-08-03 | 2021-06-18 | 赛峰航空助推器有限公司 | Fluid valve |
| CN110725994B (en) * | 2015-08-03 | 2021-06-18 | 赛峰航空助推器有限公司 | Fluid valve |
| CN110701371B (en) * | 2015-08-03 | 2021-06-22 | 赛峰航空助推器有限公司 | Fluid valve |
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Open date: 20081231 |