CN105179785A - Novel magneto-rheological digital valve and control method thereof - Google Patents
Novel magneto-rheological digital valve and control method thereof Download PDFInfo
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- CN105179785A CN105179785A CN201510572052.0A CN201510572052A CN105179785A CN 105179785 A CN105179785 A CN 105179785A CN 201510572052 A CN201510572052 A CN 201510572052A CN 105179785 A CN105179785 A CN 105179785A
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- valve
- coil
- spool
- magnetic
- armature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
- F16K31/0679—Electromagnet aspects, e.g. electric supply therefor with more than one energising coil
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a novel magneto-rheological digital valve and a control method thereof. From another aspect, a novel magneto-rheological valve structure is provided, enabling the magneto-rheological valve to have a very large control range. Not only large-flow control can be realized, small pressure-difference flow control can also be carried out. Meanwhile, for the opening and closing of a valve opening, due to the limitation of the self structure of the valve, the cooperative work of three power supplies is adopted, and delay time can be reduced on the original basis. Through adopting the magneto-rheological valve structure different from the original structure, the control range of the magneto-rheological valve is greatly increased. Meanwhile, the novel magneto-rheological digital valve has excellent air tightness, can apply various control modes and is suitable for various occasions. When magneto-rheological fluid is not used, the novel magneto-rheological digital valve can become a high-speed digital switching valve and has rapid response time.
Description
Technical field
The invention belongs to hydraulic control valve and controlling method technical field thereof, particularly be a kind of magnetic flow liquid pressure control valve, magnetic rheological valve structure is carried out to the magnetorheological digital valve of Curve guide impeller, and by improve its control reach good performance.
Background technique
Magnetic rheological valve carrys out the flow of control valve by controlling field coil size of current, but due to the mechanical part of magnetic rheological valve not movement, therefore control range is little, also restricted in applicability.
Because the hydraulic control scope of magnetic rheological valve mainly affects by two aspects:
(1) angle of magnetic flow liquid flowing direction and magnetic direction
(2) liquid chunnel of magnetic flow liquid in magnetic gap space.For (1), direction of generally being flowed by magnetic flow liquid is vertical with magnetic direction.Then can cause when not adding magnetic field owing to increasing the length of magnetic flow liquid in magnetic gap space for (2), the pressure reduction of gateway is comparatively large, and makes valve arrangement complicated, and volume increases.
Meanwhile, on digital valve controls, it is conventional method that PWM controls, and PWM controls also to can be described as pulsewidth modulation, is mainly obtained the shape and amplitude that need waveform equivalently by the width of modulated pulse signal.But due to coil inductance effect, when valve port opens and closes, always have a lag time, and this time is relevant with the structure of valve, the structure needing lag time to change valve be changed.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of novel magnetic current parameter word valve and controlling method thereof are provided, a kind of novel magnetic rheological valve structure is proposed from another angle, magnetic rheological valve is made to have very large control range, not only can realize large discharge to control, also can carry out less differential pressure flow and control; Simultaneously for the switch of valve port, due to the restriction of this body structure of valve, adopt three power supply collaborative works, make it possible to reduce lag time on the original basis, the valve port solving the magnetic rheological valve of prior art open and close time there is the problems such as delayed.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The invention provides a kind of novel magnetic current parameter word valve and controlling method thereof, comprise valve body, valve seat, armature, spool and static iron core, described valve body inner sleeve has sleeve, and described sleeve and armature are slidably matched, and described armature is connected with spool; Described static iron core is fixed in sleeve, described static iron core is wound with the first coil; Described valve seat filler opening place is fixed with plug, baffle ring and the second magazine successively, described second magazine is wound with the second coil, the ring body that described second magazine is made up of magnet case and inverse magnet, described second magazine and spool form the annular passage of magnetic flow liquid; Described second magazine is fixed in valve seat port by plug and baffle ring; Described valve body and valve seat are interconnected and fixed, and described two pairs of posts are connected with the terminal of the first coil and the second coil respectively, the displacement between plug and static iron core of described spool; Be provided with spring between described armature and static iron core, promote armature under the action of the spring and make spool end close plug; Obtain electric generation magnetic flux at the first coil, be adsorbed onto by armature on static iron core, band movable valve plug moves, and valve port is opened.
Described armature and static iron core form beating type electromagnet, and described electromagnet adopts three power supply collaborative works, and voltage is respectively 24V, 48V ,-24V, adopt Single-chip Controlling, by upper-position unit input signal, comprise valve port and close and uninterrupted two control procedures:
One, under the effect of upper-position unit input signal, control valve port closing course;
Within the t1-t2 time, be loaded on the first coil by 48V power supply, electric current is increased to rapidly close to critical current, control spool fast moving, valve port is opened;
At the remaining part-time of Ton, 24V voltage rating is loaded on the first coil, makes static iron core produce stable magnetic flux and adsorb armature, stablize spool, make valve port be in open mode;
In the t3-t4 moment in Toff, due to the inductance effect of the first coil, the first coil is made to have residual current, make armature still be in attracting state, the first coil adds-24V a backward voltage, the residual current produced by the first coil is eliminated, quick-make valve port, reduces stagnation period;
Two, control the discharge process of valve port magnetic flow liquid;
When the first coil obtains electric, spool is opened, when valve port is opened, magnetic flow liquid is entered by the filler opening of plug, the annular passage of magnetic flow liquid is formed at described second magazine and spool, by the electric current of Single-chip Controlling second coil, under the effect of magnetic flow liquid magnetic force under different electric current, regulate the viscosity of magnetic flow liquid, and then control flow.
Further, described inverse magnet is the magnetism resistent ring that diamagnetic material is made, and is fixed by gluing mode with magnet case.Magnetism resistent ring Main Function allows magnetic circuit produce along separate routes exactly, prevents magnetic loop short circuit, general material brass, 0Cr18Ni9.
Further, described magnetic force be the second coil obtain electric after, magnetic force walks around inverse magnet, goes out from magnet case, enters into the annular passage that the second magazine and spool form magnetic flow liquid.
Further, described first coil is received in a pairs of posts, and described second coil is received in another pairs of posts.
Further, described spool is that nonferromagnetic material is made.
The present invention has following beneficial effect: adopt and in the past different magnetic rheological valve structures, greatly increases the control range of magnetic rheological valve.There is superior seal simultaneously, and can multiple control modes be used, be applicable to multiple occasion.And a high speed valve can be become when not using magnetic flow liquid, and there is the response time be exceedingly fast.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, 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, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural profile schematic diagram of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof;
Fig. 2 is the second magazine structural profile schematic diagram of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof;
Fig. 3 is the magnetic force structural distribution figure of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof;
Fig. 4 is the pwm signal figure of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof;
Fig. 5 is the voltage pattern of three power supply collaborative works of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof and single supply coil when working;
Fig. 6 is the map of current of three power supply collaborative works of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof and single supply coil when working;
Fig. 7 is the spool travel figure of a kind of novel magnetic current parameter word valve of the present invention and controlling method thereof;
Wherein: 1-nut, 2-valve body, 3-the 2nd O RunddichtringO, 4-the 3rd O RunddichtringO, 5-sleeve, 6-valve seat, 7-second magazine, 8-back-up ring, 9-the 5th O RunddichtringO, 10-the 4th O RunddichtringO, 11-plug, 12-baffle ring, 13-second coil, 14-spool, 15-armature, 16-first magazine, 17-static iron core, 18-outer sleeve, 19-buting iron, 20-insulating bush, 21-the one O RunddichtringO, 22-vinyl cover, 23-hexagon nut, 24-nut cap, 25-wiring terminal, 26-first coil, 701-magnet case, 702-is against magnet, 703-magnetic force, 704-magnetic flow liquid.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to shown in Fig. 1-7, the present invention is a kind of novel magnetic current parameter word valve and controlling method thereof, comprise valve body 2, valve seat 6, armature 15, spool 14, static iron core 17, buting iron 19 and two wiring terminals 25, valve body 2 inner sleeve has sleeve 5, sleeve 5 and armature 15 are slidably matched, and armature 15 is connected with spool 14; Static iron core 17 is fixed in sleeve 5, static iron core 17 is wound with the first coil 26;
Valve seat 6 filler opening place is fixed with plug 11, baffle ring 12 and the second magazine 7 successively, second magazine 7 is wound with the second coil 13, the ring body that second magazine 7 is made up of magnet case 701 and inverse magnet 702, the second magazine 7 and spool 14 form the annular passage of magnetic flow liquid 704; Second magazine 7 is fixed in valve seat 6 port by plug 11 and baffle ring 12;
Valve body 2 and valve seat 6 are interconnected and fixed, and two pairs of posts 25 are connected with the terminal of the first coil 26 and the second coil 13 respectively, spool 14 displacement between plug 11 and static iron core 17; Be provided with spring between armature 15 and static iron core 17, promote armature 15 under the action of the spring and make spool 14 end-enclosed plug 11; Obtain electric generation magnetic flux at the first coil 26, be adsorbed onto by armature 15 on static iron core 17, band movable valve plug 14 moves, and valve port is opened.
Armature 15 and static iron core 17, first magazine 16 form beating type electromagnet, and described electromagnet adopts three power supply collaborative works, and voltage is respectively 24V, 48V ,-24V, adopt Single-chip Controlling, by upper-position unit input signal; When the first coil 26 being positioned at the first magazine 16 place obtains electric, spool 14 is opened, when valve port is opened, magnetic flow liquid 704 is entered by the filler opening of plug 11, the annular passage of magnetic flow liquid 704 is formed at the second magazine 7 and spool 14, obtain electric by Single-chip Controlling second coil 13, under the effect of magnetic flow liquid 704 magnetic force 703 under different electric current, regulate the viscosity of magnetic flow liquid 704, and then control flow.
As shown in Figure 4, under the effect of upper-position unit input signal, within the t1-t2 time, 48V power supply as shown in Figure 5, is loaded on the first coil 26 by coil voltage, electric current is increased to rapidly close to critical current, as shown in Figure 6; At the remaining part-time of Ton, 24V voltage rating is loaded on the first coil 26, when not changing the first coil 26 structure of valve, the response time can be improved like this, impact can not be had on the Safety performance of valve simultaneously; The t3-t4 moment in Toff, due to the inductance effect of the first coil 26, make the first coil 26 have residual current, make armature 15 still be in attracting state, the first coil 26 adds-24V a backward voltage, the residual current produced by first coil 26 is eliminated, now, because residual current is less, spool 14 can be return rapidly, can lag time be reduced like this, improve the response time of system.(in accompanying drawing 4, accompanying drawing 5, accompanying drawing 6 and accompanying drawing 7, the collaborative work of represented by dotted arrows three power supply, solid line representative only has the situation of 24V power work).
Wherein as shown in Figure 2, the magnetism resistent ring that inverse magnet 702 is made for diamagnetic material, is fixed by gluing mode with magnet case 701.Magnetism resistent ring Main Function allows magnetic circuit produce along separate routes exactly, prevents magnetic loop short circuit, general material brass, 0Cr18Ni9.
Wherein as shown in Figure 3, magnetic force 703 be the second coil 13 electric after, simultaneously due to magnetism resistent ring be by relative permeability lower than 1 diamagnetism material make, magnetic force 703 walks around inverse magnet 702, go out from magnet case 701, enter into the annular passage that the second magazine 7 and spool 14 form magnetic flow liquid 704.Due to magnetic field force induced 703 effects of magnetic flow liquid 704, cause the viscosity of magnetic flow liquid 704 to change, thus flow and pressure reduction can be controlled.The direction that magnetic field enters magnetic flow liquid 704 is vertical with the flow direction of magnetic flow liquid 704, therefore can effectively control magnetic flow liquid 704, reduces energy loss.
Wherein, spool 14 is made for nonferromagnetic material.
Wherein, static iron core 17 is fixed with and the first magazine 16, first magazine 16 is wound with the first coil 26, first magazine 16 for magnetic material and makes.
Wherein, the first coil 26 and the second coil 13 are homogenous configuration and material, and the first coil 26 is received in a pairs of posts 25, and the second coil 13 is received in another pairs of posts 25.
Wherein, valve body 2 port is by nut 1 fixed muffle 5; Outside static iron core 17, cover has outer sleeve 18; Vinyl cover 22 is provided with an O RunddichtringO 21 with the surface of contact of insulating bush 20; The 2nd O RunddichtringO 3 is provided with between buting iron 19 and sleeve 5; The 3rd O RunddichtringO 4 is provided with between sleeve 5 and valve body 2; The 4th O RunddichtringO 10 is provided with between plug 11 and valve seat 6; Be provided with the 5th O RunddichtringO the 9, five O RunddichtringO 9 outside valve seat 6 to be fixed by back-up ring 8; Buting iron 19 is fixed on sleeve 5 end, and buting iron 19 end winding support has insulating bush 20 and vinyl cover 22, vinyl cover 22 is fixed with four wiring terminals 25, and insulating bush 20 and vinyl cover 22 are for link post 25 and ensure insulation.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this specification, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician understand well and to utilize the present invention.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (6)
1. a novel magnetic current parameter word valve, comprises valve body (2), valve seat (6), armature (15), spool (14), static iron core (17) and two pairs of posts (25), it is characterized in that:
Described valve body (2) inner sleeve has sleeve (5), and described sleeve (5) and armature (15) are slidably matched, and described armature (15) is connected with spool (14); Described static iron core (17) is fixed in sleeve (5), described static iron core (17) is wound with the first coil (26);
Described valve seat (6) filler opening place is fixed with plug (11), baffle ring (12) and the second magazine (7) successively, described second magazine (7) is wound with the second coil (13), the ring body that described second magazine (7) is made up of magnet case (701) and inverse magnet (702), described second magazine (7) and spool (14) form the annular passage of magnetic flow liquid (704); Described second magazine (7) is fixed in valve seat (6) port by plug (11) and baffle ring (12);
Described valve body (2) and valve seat (6) are interconnected and fixed, described two pairs of posts (25) are connected with the terminal of the first coil (26) and the second coil (13) respectively, described spool (14) displacement between plug (11) and static iron core (17); Be provided with spring between described armature (15) and static iron core (17), promote armature (15) under the action of the spring and make spool (14) end-enclosed plug (11); Obtain electric generation magnetic flux at the first coil (26), be adsorbed onto by armature (15) on static iron core (17), band movable valve plug (14) is mobile, and valve port is opened.
2. the controlling method of a novel magnetic current parameter word valve, it is characterized in that: described armature (15) and static iron core (17) form beating type electromagnet, described electromagnet adopts three power supply collaborative works, voltage is respectively 24V, 48V ,-24V, adopt Single-chip Controlling, by upper-position unit input signal, comprise valve port and close and uninterrupted two control procedures:
One, under the effect of upper-position unit input signal, control valve port closing course;
Within the t1-t2 time, be loaded into by 48V power supply on the first coil (26), electric current is increased to rapidly close to critical current, control spool (14) fast moving, valve port is opened;
At the remaining part-time of Ton, 24V voltage rating is loaded on the first coil (26), make static iron core (17) produce stable magnetic flux and adsorb armature (15), stablizing spool (14), make valve port be in open mode;
The t3-t4 moment in Toff, due to the inductance effect of the first coil (26), the first coil (26) is made to have residual current, armature (15) is made still to be in attracting state, first coil (26) adds-24V a backward voltage, the residual current produced by first coil (26) is eliminated, quick-make valve port, reduces stagnation period;
Two, control the discharge process of valve port magnetic flow liquid (704);
When the first coil (26) obtains electric, spool (14) is opened, when valve port is opened, magnetic flow liquid (704) is entered by the filler opening of plug (11), the annular passage of magnetic flow liquid (704) is formed at described second magazine (7) and spool (14), by the electric current of Single-chip Controlling second coil (13), regulate the viscosity of magnetic flow liquid (704) under the effect of magnetic flow liquid (704) magnetic force (703) under different electric current, and then control flow.
3. one according to claim 1 novel magnetic current parameter word valve and controlling method thereof, is characterized in that, the magnetism resistent ring that described inverse magnet (702) is made for diamagnetic material, fixed by gluing mode with magnet case (701).
4. one according to claim 1 novel magnetic current parameter word valve and controlling method thereof, it is characterized in that, described magnetic force (703) be the second coil (13) electric after, magnetic force (703) walks around inverse magnet (702), go out from magnet case (701), enter into the annular passage that the second magazine (7) and spool (14) form magnetic flow liquid (704).
5. one according to claim 1 novel magnetic current parameter word valve and controlling method thereof, it is characterized in that, described first coil (26) is received in a pairs of posts (25), and described second coil (13) is received in another pairs of posts (25).
6. one according to claim 1 novel magnetic current parameter word valve and controlling method thereof, is characterized in that, described spool (14) is made for nonferromagnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572052.0A CN105179785B (en) | 2015-09-09 | 2015-09-09 | A kind of new magnetorheological digital valve and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510572052.0A CN105179785B (en) | 2015-09-09 | 2015-09-09 | A kind of new magnetorheological digital valve and its control method |
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| CN105179785A true CN105179785A (en) | 2015-12-23 |
| CN105179785B CN105179785B (en) | 2017-09-26 |
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| CN201510572052.0A Active CN105179785B (en) | 2015-09-09 | 2015-09-09 | A kind of new magnetorheological digital valve and its control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626473A (en) * | 2017-08-29 | 2018-10-09 | 李占江 | Intelligent electronic network interconnection type valve controller program application process |
| CN108956124A (en) * | 2018-09-06 | 2018-12-07 | 合肥工业大学 | The time resolution characteristics of electric/magnetic rheological actuator are tested automatically and calibrating platform |
| CN110852014A (en) * | 2019-11-15 | 2020-02-28 | 雪龙集团股份有限公司 | Electromagnetic valve performance analysis method based on multi-physical-field optimization |
| CN116484974A (en) * | 2023-04-25 | 2023-07-25 | 大连祥瑞阀门制造有限公司 | Flow control system of jetting valve based on magneto-rheological technology |
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| JPH1038125A (en) * | 1996-07-18 | 1998-02-13 | Aisin Seiki Co Ltd | Solenoid valve |
| US6199587B1 (en) * | 1998-07-21 | 2001-03-13 | Franco Shlomi | Solenoid valve with permanent magnet |
| CN201547282U (en) * | 2009-10-19 | 2010-08-11 | 中国航天科技集团公司烽火机械厂 | Digital response switch valve |
| CN201844096U (en) * | 2010-10-08 | 2011-05-25 | 河南航天压力元件有限公司 | Electromagnetic valve for natural gas |
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2015
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| JPH1038125A (en) * | 1996-07-18 | 1998-02-13 | Aisin Seiki Co Ltd | Solenoid valve |
| US6199587B1 (en) * | 1998-07-21 | 2001-03-13 | Franco Shlomi | Solenoid valve with permanent magnet |
| CN201547282U (en) * | 2009-10-19 | 2010-08-11 | 中国航天科技集团公司烽火机械厂 | Digital response switch valve |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626473A (en) * | 2017-08-29 | 2018-10-09 | 李占江 | Intelligent electronic network interconnection type valve controller program application process |
| CN108626473B (en) * | 2017-08-29 | 2019-10-25 | 李占江 | Intelligent electronic network interconnection type valve controller program application method |
| CN108956124A (en) * | 2018-09-06 | 2018-12-07 | 合肥工业大学 | The time resolution characteristics of electric/magnetic rheological actuator are tested automatically and calibrating platform |
| CN108956124B (en) * | 2018-09-06 | 2019-12-06 | 合肥工业大学 | Automatic test and calibration platform for time response characteristics of electro/magneto-rheological actuator |
| CN110852014A (en) * | 2019-11-15 | 2020-02-28 | 雪龙集团股份有限公司 | Electromagnetic valve performance analysis method based on multi-physical-field optimization |
| CN110852014B (en) * | 2019-11-15 | 2022-04-22 | 华南理工大学 | Electromagnetic valve performance analysis method based on multi-physical-field optimization |
| CN116484974A (en) * | 2023-04-25 | 2023-07-25 | 大连祥瑞阀门制造有限公司 | Flow control system of jetting valve based on magneto-rheological technology |
| CN116484974B (en) * | 2023-04-25 | 2023-11-03 | 大连祥瑞阀门制造有限公司 | Flow control system of jetting valve based on magneto-rheological technology |
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| Publication number | Publication date |
|---|---|
| CN105179785B (en) | 2017-09-26 |
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