CN102374204B - A kind of magnetorheological pilot-operated overflow valve - Google Patents
A kind of magnetorheological pilot-operated overflow valve Download PDFInfo
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- CN102374204B CN102374204B CN201110318062.3A CN201110318062A CN102374204B CN 102374204 B CN102374204 B CN 102374204B CN 201110318062 A CN201110318062 A CN 201110318062A CN 102374204 B CN102374204 B CN 102374204B
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- plug
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Abstract
The invention provides a kind of magnetorheological pilot-operated overflow valve, belong to hydraulic transmission technology field. It comprises end cap, end cap seal circle, MR valve housing, coil, iron core, spool, guide valve blocks, pilot valve sealing ring, damping block, main valve housing sealing ring, spring, guide rod sealing ring, guide rod, main valve housing, main valve plug, main valve seat sealing ring, main valve seat, main valve body, damper. Main valve plug adopts parabola bulb shape; spool semi-cone angle is greater than valve seat semi-cone angle; can effectively reduce the pressure reduction that cone valve is imported and exported; minimum sub-atmospheric pressure moves backward along the direction of liquid stream, appear at spool after, avoid valve seat place to occur minimum sub-atmospheric pressure; thereby reduce the possibility that cavitation erosion occurs; reduce noise, the key component of protection spool valve seat, the service life of improving magnetorheological pilot-operated overflow valve.
Description
Technical field
The present invention relates to a kind of magnetorheological pilot-operated overflow valve, belong to hydraulic transmission technology field.
Background technology
Magnetic flow liquid is a kind of functional fluid, has not only had the mobility of fluid but also has had the plasticity of solid, can within the utmost point short time, realize between solid-liquid two-phase and changing. By regulating the size of externally-applied magnetic field intensity to make the rheological behavior such as viscosity, elasticity of magnetic flow liquid occur to change rapidly, this transformation is reversible, and viscosity can realize stepless variation with the variation of magnetic field intensity, and can change magnetic field intensity by the size that regulates impressed current, thereby realize the control to its mechanical property. The MR valve designing according to the rheological behavior of magnetic flow liquid, can realize the Based Intelligent Control to pressure and flow. At present, existing MR valve is all Direct Action Type valve, and the damping force of its generation is less, can only be used for the hydraulic system of low-pressure low flow as overflow valve. Therefore, the pilot control level using MR valve as overflow valve, designs a kind of magnetorheological pilot-operated overflow valve, meets the needs of high-pressure high flux hydraulic power system.
Summary of the invention
The object of this invention is to provide a kind of magnetorheological pilot-operated overflow valve, for high-pressure high flux hydraulic power system, realize continuous, stepless, the Based Intelligent Control of valve pressure and flow.
Technical scheme of the present invention is: a kind of magnetorheological pilot-operated overflow valve, forms main valve by guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Main valve exit is also connected with pilot valve.
Described pilot valve comprises end cap 1, MR valve housing 3, coil 4, iron core 5, spool 7. Iron core 5 is loaded in MR valve housing 3, iron core 5 axle center are through-hole structure, are wound with coil 4 on it, spool 7 inserts in the hole of iron core 5, between iron core 5 and spool 7, form the working clearance 6, the width of working clearance 6 is 0.1mm ~ 1.8mm, length is 6mm ~ 40mm, and the size of working clearance 7, according to magnetic field intensity, magnetic flow liquid character and actual needs, is selected to determine in given range. Spool 7 one end withstand on main valve internal damping piece 10, and the other end is fixed by end cap 1.
Described main valve comprises guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Pilot valve packs in guide valve blocks 8, end cap 1 and guide valve blocks 8 are fixed on main valve body 19, damping block 10 packs in main valve body 19, main valve housing 15, main valve seat 18 are respectively charged in main valve body 19, main valve plug 16 packs in main valve housing 15, guide rod 14 one end and main valve plug 16 link together, and the other end is pressed on main valve seat 18 main valve plug 16 by spring 12, and damper 20 is contained in main valve body 19. Plug 21 is housed on main valve body 19.
The maximum working pressure (MWP) of described magnetorheological pilot-operated overflow valve is 30MPa, and maximum stream flow is 500L/min.
When work, when after the coil electricity in pilot valve, there is magnetic field in the working clearance between iron core and spool. The magnetic flow liquid of working clearance of flowing through is subject to the effect in magnetic field, and its viscosity increases and produces certain resistance, and the mobile of magnetic flow liquid suffers restraints, and the pressure differential of turnover MR valve increases. In the time that the electric current in coil is increased to certain value, magnetic flow liquid changes semi-solid state into, and the pressure differential of pilot valve also reaches maximum simultaneously. When system pressure is during lower than pilot valve set pressure, the magnetic flow liquid in pilot valve is because damping force cannot be passed through the working clearance, and before pilot valve, after cavity pressure, main valve, cavity pressure equates with system works pressure, and main valve plug is closed. When system works pressure is during higher than pilot valve set pressure, the magnetic flow liquid internal stress in pilot valve exceedes semi-solid shear stress and makes it destroyed, and magnetic flow liquid returns to again flow regime and passes through the working clearance. Due to the effect of main valve back cavity damper make before pilot valve cavity pressure lower than main valve after cavity pressure, the pressure fluid of main valve back cavity flows out to pilot valve ante-chamber, makes the pressure decreased of main valve back cavity, now main valve plug is subject to ambient pressure effect to open overflow.
The invention has the beneficial effects as follows:
(1) working media is micron order or nano level magnetic flow liquid;
(2) working clearance of MR valve is designed between iron core and spool, improves the magnetic induction intensity of magnetic flow liquid in the working clearance, increases the damping force of MR valve, improves the working range of magnetorheological pilot valve;
(3) magnetic induction intensity of magnetic flow liquid is to regulate by size of current, can directly realize the control to magnetorheological pilot-operated overflow valve pressure and flow by the signal of telecommunication;
(4) main valve plug adopts parabola bulb shape, spool semi-cone angle is greater than valve seat semi-cone angle, can effectively reduce the pressure reduction that cone valve is imported and exported, minimum sub-atmospheric pressure moves backward along the direction of liquid stream, appear at spool after, avoid valve seat place to occur minimum sub-atmospheric pressure, thereby reduce the possibility that cavitation erosion occurs, reduce noise, the key component of protection spool valve seat, the service life of improving magnetorheological pilot-operated overflow valve;
(5) sealing ring adopts carbon graphite material, and the sealing property of this valve is significantly improved;
(6) main valve housing adopts metal-graphite material processing, has good corrosion resistance, excellent self-lubricating property, and antifriction, antidetonation, abrasion resistance are good;
(7) in valve, adopt the liquid of three dampers to hinder network, realized the pressure controlled while, improved the stability of main valve.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
In figure, each label is: 1: end cap, 2: end cap seal circle, 3: MR valve housing, 4: coil, 5: iron core, 6: working clearance, 7: spool, 8: guide valve blocks, 9: pilot valve sealing ring, 10: damping block, 11: main valve housing sealing ring, 12: spring, 13: guide rod sealing ring, 14: guide rod, 15: main valve housing, 16: main valve plug, 17: main valve seat sealing ring, 18: main valve seat, 19: main valve body, 20: damper, 21: plug.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described, but content of the present invention is not limited to described scope.
Implementation column 1: as shown in the figure, a kind of magnetorheological pilot-operated overflow valve, forms main valve by guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Main valve exit is also connected with pilot valve.
Described pilot valve comprises end cap 1, MR valve housing 3, coil 4, iron core 5, spool 7. Iron core 5 is loaded in MR valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron core 5, between iron core 5 and spool 7, forms the working clearance 6, and the width of working clearance 6 is 0.1mm, and length is 6mm. Spool 7 one end withstand on main valve internal damping piece 10, and the other end is fixed by end cap 1.
Described main valve comprises guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Pilot valve packs in guide valve blocks 8, end cap 1 and guide valve blocks 8 are fixed on main valve body 19, damping block 10 packs in main valve body 19, main valve housing 15, main valve seat 18 are respectively charged in main valve body 19, main valve plug 16 packs in main valve housing 15, guide rod 14 one end and main valve plug 16 link together, and the other end is pressed on main valve seat 18 main valve plug 16 by spring 12, and damper 20 is contained in main valve body 19. Plug 21 is housed on main valve body 19.
The maximum working pressure (MWP) of described magnetorheological pilot-operated overflow valve is 30MPa, and maximum stream flow is 500L/min.
Implementation column 2: as shown in the figure, a kind of magnetorheological pilot-operated overflow valve, forms main valve by guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Main valve exit is also connected with pilot valve.
Described pilot valve comprises end cap 1, MR valve housing 3, coil 4, iron core 5, spool 7. Iron core 5 is loaded in MR valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron core 5, between iron core 5 and spool 7, forms the working clearance 6, and the width of working clearance 6 is 1.8mm, and length is 40mm. Spool 7 one end withstand on main valve internal damping piece 10, and the other end is fixed by end cap 1.
Described main valve comprises guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Pilot valve packs in guide valve blocks 8, end cap 1 and guide valve blocks 8 are fixed on main valve body 19, damping block 10 packs in main valve body 19, main valve housing 15, main valve seat 18 are respectively charged in main valve body 19, main valve plug 16 packs in main valve housing 15, guide rod 14 one end and main valve plug 16 link together, and the other end is pressed on main valve seat 18 main valve plug 16 by spring 12, and damper 20 is contained in main valve body 19. Plug 21 is housed on main valve body 19.
The maximum working pressure (MWP) of described magnetorheological pilot-operated overflow valve is 30MPa, and maximum stream flow is 500L/min.
Implementation column 3: as shown in the figure, a kind of magnetorheological pilot-operated overflow valve, forms main valve by guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Main valve exit is also connected with pilot valve.
Described pilot valve comprises end cap 1, MR valve housing 3, coil 4, iron core 5, spool 7. Iron core 5 is loaded in MR valve housing 3, and iron core 5 axle center are through-hole structure, are wound with coil 4 on it, and spool 7 inserts in the hole of iron core 5, between iron core 5 and spool 7, forms the working clearance 6, and the width of working clearance 6 is 0.9mm, and length is 17mm. Spool 7 one end withstand on main valve internal damping piece 10, and the other end is fixed by end cap 1.
Described main valve comprises guide valve blocks 8, damping block 10, spring 12, guide rod 14, main valve housing 15, main valve plug 16, main valve seat 18, main valve body 19, damper 20, plug 21. Pilot valve packs in guide valve blocks 8, end cap 1 and guide valve blocks 8 are fixed on main valve body 19, damping block 10 packs in main valve body 19, main valve housing 15, main valve seat 18 are respectively charged in main valve body 19, main valve plug 16 packs in main valve housing 15, guide rod 14 one end and main valve plug 16 link together, and the other end is pressed on main valve seat 18 main valve plug 16 by spring 12, and damper 20 is contained in main valve body 19. Plug 21 is housed on main valve body 19.
The maximum working pressure (MWP) of described magnetorheological pilot-operated overflow valve is 30MPa, and maximum stream flow is 500L/min.
Claims (5)
1. a magnetorheological pilot-operated overflow valve, form main valve by guide valve blocks (8), damping block (10), spring (12), guide rod (14), main valve housing (15), main valve plug (16), main valve seat (18), main valve body (19), damper (20), plug (21), it is characterized in that: main valve exit is also connected with pilot valve;
Pilot valve comprises end cap (1), MR valve housing (3), coil (4), iron core (5), spool (7), iron core (5) is loaded in MR valve housing (3), iron core (5) axle center is through-hole structure, is wound with coil (4) on it, spool (7) inserts in the hole of iron core (5), between iron core (5) and spool (7), form the working clearance (6), it is upper that spool (7) one end withstands on main valve internal damping piece (10), and the other end is fixing by end cap (1);
Pilot valve packs in guide valve blocks (8), end cap (1) and guide valve blocks (8) are fixed on main valve body (19), damping block (10) packs in main valve body (19), main valve housing (15), main valve seat (18) are respectively charged in main valve body (19), main valve plug (16) packs in main valve housing (15), guide rod (14) one end and main valve plug (16) link together, it is upper that the other end makes main valve plug (16) be pressed in main valve seat (18) by spring (12), and damper (20) is contained in main valve body (19).
2. magnetorheological pilot-operated overflow valve according to claim 1, is characterized in that: plug (21) is housed on main valve body (19).
3. magnetorheological pilot-operated overflow valve according to claim 1, is characterized in that: the working clearance (6) forming between described spool (7) and iron core (5) is 0.1mm ~ 1.8mm.
4. magnetorheological pilot-operated overflow valve according to claim 1, is characterized in that: working clearance (6) length forming between described spool (7) and iron core (5) is 6mm ~ 40mm.
5. magnetorheological pilot-operated overflow valve according to claim 1, is characterized in that: the maximum working pressure (MWP) of magnetorheological pilot-operated overflow valve is 30MPa, and maximum stream flow is 500L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110318062.3A CN102374204B (en) | 2011-10-19 | 2011-10-19 | A kind of magnetorheological pilot-operated overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110318062.3A CN102374204B (en) | 2011-10-19 | 2011-10-19 | A kind of magnetorheological pilot-operated overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102374204A CN102374204A (en) | 2012-03-14 |
| CN102374204B true CN102374204B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110318062.3A Expired - Fee Related CN102374204B (en) | 2011-10-19 | 2011-10-19 | A kind of magnetorheological pilot-operated overflow valve |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103062145A (en) * | 2013-01-14 | 2013-04-24 | 昆明理工大学 | Magnetorheological plug-in high-speed switching valve |
| CN103185043B (en) * | 2013-03-12 | 2015-11-04 | 合肥工业大学 | Intelligent liquid flow control valve |
| CN104632745B (en) * | 2015-02-11 | 2017-10-20 | 华侨大学 | A kind of sequence valve using magnetorheological pilot valve |
| CN104632744B (en) * | 2015-02-11 | 2017-10-20 | 华侨大学 | A kind of magnetorheological pilot valve |
| CN105003478A (en) * | 2015-06-30 | 2015-10-28 | 河南平高电气股份有限公司 | Control valve and circuit breaker hydraulic operating mechanism using control valve |
| CN105221634B (en) * | 2015-11-05 | 2017-07-07 | 重庆材料研究院有限公司 | Damper piston structure based on adaptive damping choke valve |
| CN106151144A (en) * | 2016-08-11 | 2016-11-23 | 张广 | A kind of check valve based on magnetic rheology effect |
| CN111306126B (en) * | 2020-03-20 | 2021-04-16 | 中国矿业大学 | Magnetorheological fluid pilot type pressure reducing valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353839A (en) * | 1992-11-06 | 1994-10-11 | Byelocorp Scientific, Inc. | Magnetorheological valve and devices incorporating magnetorheological elements |
| CN2697420Y (en) * | 2004-04-21 | 2005-05-04 | 华中科技大学 | Pre-guiding type water pressure overflow valve |
| KR20050115212A (en) * | 2005-11-21 | 2005-12-07 | 윤영원 | A proportional controlling solenoid valve and its controlling method |
| CN201461578U (en) * | 2009-07-02 | 2010-05-12 | 昆明理工大学 | Digital pure-water overflow valve |
| CN201531476U (en) * | 2009-10-15 | 2010-07-21 | 昆明理工大学 | Magnetorheological fluid pilot operated type relief valve |
| CN202280680U (en) * | 2011-10-19 | 2012-06-20 | 昆明理工大学 | Magnetorheological pilot overflow valve |
-
2011
- 2011-10-19 CN CN201110318062.3A patent/CN102374204B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353839A (en) * | 1992-11-06 | 1994-10-11 | Byelocorp Scientific, Inc. | Magnetorheological valve and devices incorporating magnetorheological elements |
| CN2697420Y (en) * | 2004-04-21 | 2005-05-04 | 华中科技大学 | Pre-guiding type water pressure overflow valve |
| KR20050115212A (en) * | 2005-11-21 | 2005-12-07 | 윤영원 | A proportional controlling solenoid valve and its controlling method |
| CN201461578U (en) * | 2009-07-02 | 2010-05-12 | 昆明理工大学 | Digital pure-water overflow valve |
| CN201531476U (en) * | 2009-10-15 | 2010-07-21 | 昆明理工大学 | Magnetorheological fluid pilot operated type relief valve |
| CN202280680U (en) * | 2011-10-19 | 2012-06-20 | 昆明理工大学 | Magnetorheological pilot overflow valve |
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| CN102374204A (en) | 2012-03-14 |
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Granted publication date: 20160525 Termination date: 20201019 |