CN204512040U - Magnetorheological pilot valve - Google Patents
Magnetorheological pilot valve Download PDFInfo
- Publication number
- CN204512040U CN204512040U CN201520098105.5U CN201520098105U CN204512040U CN 204512040 U CN204512040 U CN 204512040U CN 201520098105 U CN201520098105 U CN 201520098105U CN 204512040 U CN204512040 U CN 204512040U
- Authority
- CN
- China
- Prior art keywords
- magnetorheological pilot
- pilot valve
- magnetorheological
- valve
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of magnetorheological pilot valve, comprise magnetorheological pilot poppet valve spool, front shroud, magnetorheological pilot valve piston, electromagnetic coil and iron core, magnetorheological pilot valve body, auxiliary pressure adjusting spring, screw press, check valve sheet, overcurrent plate, briquetting; The valve rod of magnetorheological pilot poppet valve spool, through front shroud, is fit in magnetorheological pilot valve body, and with magnetorheological pilot valve piston compact siro spinning technology; Forming the working clearance between magnetorheological pilot valve piston, magnetorheological pilot valve body, electromagnetic coil and iron core makes magnetic rheological liquid flow; Magnetorheological pilot valve piston and magnetorheological pilot valve body and electromagnetic coil and iron core are high permeability material; Form space between the valve rod of overcurrent plate and magnetorheological pilot poppet valve spool, check valve sheet can in this space resiliently deformable; Rotate briquetting compression or the auxiliary pressure adjusting spring of release that auxiliary screw press can promote its front end.
Description
Technical field
The utility model relates to hydraulic transmission technology field, particularly relates to a kind of magnetorheological pilot valve.
Technical background
Hydrovalve is the control unit of hydraulic control oil flow direction in hydraulic system, pressure and flow, and its structure has direct-acting type and leading type, and Pilotoperated reducing valve is applicable to the higher system of circuit pressure.The cracking pressure of main valve is the screw rod by rotating pilot valve core rear, regulates pilot valve initial tension of spring to realize.Be characterized in easy to adjust, flexible, but pressure control range is limited and cannot realize the automation of pressure real-time monitoring and adjustment, sequencing and intellectuality.Magnetic rheological liquid is a kind of viscosity controlled " intellectual material ", can not bear shearing force under normality, and namely very little shearing force just can make it flow; But when being in magnetic field environment, it can bear certain shearing stress, when acting on the shearing force on liquid and being less than its yield stress, magnetic rheological liquid can not flow, and only produces resiliently deformable, only has the liquid when shearing force is greater than yield stress just can flow." intelligence " sex expression of magnetic rheological liquid exists, and its viscosity and shear yield stress are that magnetic intensity is larger, and its viscosity and shear yield stress also increase thereupon with residing change of magnetic field strength.At present based on the deficiency of hydrovalve ubiquity two aspect of magnetic converting technique, first application magnetic rheological liquid is as working medium, and magnetic rheological liquid is by liquid continuous phase and solid particle dispersions phase composition, viscosity is generated heat greatly, easily, cost is high, so be not suitable for being used as hydraulicdriven working medium in a large number; They are two years old, place's working clearance is only comprised in magnetic rheological valve, during valve events, magnetorheological liquid viscosity increases, larger viscous resistance can be born when flowing through in gap thus regulate pilot valve cracking pressure, but when valve is in return stroke, liquid is still in magnetic field and keeps high viscosity, and this makes return stroke also bear large viscous resistance, valve can be caused not reset in time or homing action obviously delayed, add the response time of hydrovalve.
Model utility content
It is the pilot valve of working medium that content of the present utility model is to provide a kind of magnetic rheological liquid that adopts, control bound cracking pressure is carried out by regulating the pretightening force of the electric current [strength in magnetorheological pilot valve coil and pilot valve spring, realization regulates and controls real time implementation, automation, intellectuality and increases the object of pressure regulation spectrum, has the feature responding and be swift in motion simultaneously.Magnetorheological pilot valve magnetic rheological liquid of the present utility model is only closed in pilot valve, and it is the Hydraulic Power Transmission System of working medium that main valve is still applicable to normal hydraulic oil.
In order to solve above-mentioned technical problem, the utility model provides a kind of magnetorheological pilot valve, comprises magnetorheological pilot poppet valve spool 1, front shroud 3, magnetorheological pilot valve piston 5, electromagnetic coil and iron core 6, magnetorheological pilot valve body 7, auxiliary pressure adjusting spring 8, screw press 11, check valve sheet 15, overcurrent plate 14, briquetting 12;
The valve rod of magnetorheological pilot poppet valve spool 1, through front shroud 3, is fit in magnetorheological pilot valve body 7, and with magnetorheological pilot valve piston 5 compact siro spinning technology; Forming the working clearance 16 between magnetorheological pilot valve piston 5, magnetorheological pilot valve body 7, electromagnetic coil and iron core 6 makes magnetic rheological liquid 13 flow; Magnetorheological pilot valve piston 5 and magnetorheological pilot valve body 7 and electromagnetic coil and iron core 6 are high permeability material; Form space between the valve rod of overcurrent plate 14 and magnetorheological pilot poppet valve spool 1, check valve sheet 15 can in this space resiliently deformable; Rotate the briquetting 12 of assisting screw press 11 can promote its front end and compress or discharge auxiliary pressure adjusting spring 8.
In a preferred embodiment: the main valve be connected with described magnetorheological pilot valve is applicable to the Hydraulic Power Transmission System that working medium is normal hydraulic oil; In magnetorheological pilot valve, working medium is magnetic flow liquid, and magnetic rheological liquid is enclosed in magnetorheological pilot valve, and volume is at 30-150ml.
In a preferred embodiment: the width of the working clearance formed between described magnetorheological pilot valve piston 5 and electromagnetic coil and iron core 6 is 0.3-3mm, and length is 6-60mm.
In a preferred embodiment: described magnetorheological pilot valve piston 5 is a uniform 3-6 through flow hole 17 near central position, through flow hole 17 centre distance magnetorheological pilot valve piston 5 outer round surface radial distance is greater than 5mm.
In a preferred embodiment: described magnetorheological pilot valve piston 5 is provided with described check valve sheet 15 and overcurrent plate 14 with the end face at magnetorheological pilot poppet valve spool 1 opposite direction place, check valve sheet 15 is made up of elastic material, resiliently deformable can be produced in space between overcurrent plate 14 and piston 5 end face, close or open through flow hole 17.
In a preferred embodiment: the briquetting 12 and the screw rod 11 that have the pretightening force of auxiliary pressure adjusting spring 8 and the auxiliary pressure adjusting spring 8 of adjustment described in described magnetorheological pilot valve body 7 side installation.
In a preferred embodiment: described main valve working pressure regulation range is 1-40MPa.
Compared to prior art, the utility model possesses following beneficial effect:
1. main valve is combined with magnetorheological pilot valve, magnetic rheological valve is applied to Hydraulic Power Transmission System that normal hydraulic oil is working medium, enhances the ability to work of hydraulic system, have also been enlarged the application area of magnetic rheological valve; Magnetorheological pilot valve adopts current signal to control, and achieves the automation of main valve working pressure, intellectuality and real time implementation and controls.
2. magnetorheological pilot valve inside increases through flow hole, control by the magnetic rheological liquid viscous force producing magnetic rheology effect when pilot valve is opened, and when pilot valve resets, magnetic rheological liquid flows through through flow hole, be in outside the magnetic rheology effect zone of influence, therefore the mobility of magnetic rheological liquid does not reduce, and homing action response is rapid, sensitive.
3. auxiliary screw press and the common regulable control pressure of electromagnetic coil, increase range of regulation.
Accompanying drawing explanation
Fig. 1 is the structural representation of magnetorheological pilot valve;
Fig. 2 is the structural representation of check valve sheet in magnetorheological pilot valve.
Embodiment
Hereafter with embodiment, the utility model is described further by reference to the accompanying drawings.
With reference to Fig. 1-2, a kind of magnetorheological pilot valve, the main valve working medium be attached thereto is normal hydraulic oil, and main valve working pressure regulation range is 1-40MPa, and in described magnetorheological pilot valve, working medium is magnetic flow liquid, and magnetic flow liquid body bulk is at 30-150ml.
Described magnetorheological pilot valve comprises: magnetorheological pilot poppet valve spool 1, front shroud 3, magnetorheological pilot valve piston 5, electromagnetic coil and iron core 6, magnetorheological pilot valve body 7, auxiliary pressure adjusting spring 8, screw press 11, check valve sheet 15, overcurrent plate 14, briquetting 12; The valve rod of described magnetorheological pilot poppet valve spool 1 is through front shroud 3, be fit in magnetorheological pilot valve body 7, and with magnetorheological pilot valve piston 5 compact siro spinning technology, forming the working clearance 16 between magnetorheological pilot valve piston 5, magnetorheological pilot valve body 7, electromagnetic coil and iron core 6 makes magnetic rheological liquid 13 flow, the width of described working clearance is 0.3-3mm, and length is 6-60mm.Magnetorheological pilot valve piston 5 and magnetorheological pilot valve body 7 and electromagnetic coil and iron core 6 are high permeability material.
Described magnetorheological pilot valve piston 5 is a uniform 3-6 through flow hole 17 near central position, and through flow hole centre distance magnetorheological pilot valve outside piston radial surface distance is greater than 5mm.Magnetorheological pilot valve piston 5 is provided with check valve sheet 15 and overcurrent plate 14 with the end face at magnetorheological pilot poppet valve spool 1 opposite direction place, check valve sheet is made up of elastic material, resiliently deformable can be produced in space between overcurrent plate (14) and piston (5) end face, close or open through flow hole 17.
Form space between the valve rod of described overcurrent plate 14 and magnetorheological pilot poppet valve spool 1, can there is resiliently deformable in check valve sheet 15 in this space, closes or open through flow hole 17.
There are the briquetting 12 of auxiliary pressure adjusting spring 8 and Regulation spring pretightening force, screw press 11 and counterpart 9,10 in magnetorheological pilot valve body 7 side.The briquetting 12 that rotation screw press 11 can promote its front end compresses or discharges auxiliary pressure adjusting spring 8.
During work, the left chamber of magnetorheological pilot poppet valve spool 1 during hydraulic oil is entered by main valve internal damping hole.When the pressure of hydraulic system is less than magnetic rheological liquid shear yield stress on the right side of magnetorheological pilot poppet valve spool 1 and magnetorheological pilot valve spring power sum, magnetorheological pilot poppet valve spool 1 can not be opened.When the magnetic rheological liquid shear yield stress on the right side of system liquid pressure is greater than magnetorheological pilot poppet valve spool 1 and magnetorheological pilot valve spring power sum, magnetorheological pilot poppet valve spool 1 drives magnetorheological pilot valve piston 5 jointly to move right, magnetic rheological liquid is flowed to ante-chamber by the working clearance 16 from magnetorheological pilot valve piston 5 back cavity simultaneously, and magnetorheological pilot poppet valve spool 1 is opened.In main valve, hydraulic oil connects fuel tank from the passway that magnetorheological pilot poppet valve spool 1 is opened, and now the upper and lower two chamber mineralization pressures of main valve plug are poor.When the pressure difference on main valve plug can balance main valve plug spring force, main valve plug is opened.
During magnetorheological pilot poppet valve spool 1 opening movement, the pressure of magnetic rheological liquid acts on the right flank of check valve sheet 15 by the hole on overcurrent plate 14, make its resiliently deformable and be adjacent to the right side of magnetorheological pilot valve piston 5, thus the through flow hole 17 sealed on magnetorheological pilot valve piston 5, therefore magnetic rheological liquid can only be flowed by the working clearance 16, and the working clearance 16 is in the magnetic line of force area of influence of electromagnetic coil and iron core 6 generation, only have the hydraulic coupling at main valve inlet place can overcome magnetic flow liquid surrender before viscous force and magnetorheological pilot valve spring force time, magnetic flow liquid just can flow, valve core of main valve can be opened.Regulate electric current [strength in electromagnetic coil and iron core 6, can change the shear yield stress of magnetic flow liquid, namely it produces the power needed for flowing, also just can regulate the cracking pressure of main valve.
Hydraulic system working pressure declines, during lower than main valve cracking pressure, hydraulic coupling on the left of magnetorheological pilot valve piston 5 is less than the pressure on right side, magnetorheological pilot valve piston 5 pushes away forward by auxiliary pressure adjusting spring 8, the magnetic flow liquid pressure of magnetorheological pilot valve piston 5 ante-chamber acts on the left surface of check valve sheet 15 by through flow hole 17, check valve sheet recovers the shape before resiliently deformable, opens through flow hole 17.And through flow hole 17 is comparatively large with the distance of electromagnetic coil and iron core 6, affect faint by the magnetic line of force, therefore in through flow hole 17, magnetic rheological liquid 13 viscosity is low is easy to flowing, and therefore can flow to rapidly piston back cavity, make magnetorheological pilot poppet valve valve core reset, main valve plug is closed.
The control of solenoid current intensity can realize real time implementation and intellectuality, but limited space in magnetorheological pilot valve, so the electromagnetic coil number of turn is too much unsuitable, the electric current [strength that can load is usually at 0-2.5A, and the magnetic flow liquid shearing stress produced can regulate within the scope of this.In order to increase main valve pressure regulation spectrum, at pilot valve rear portion, auxiliary pressure adjusting spring 8, screw press 11 and briquetting 12 are installed additional, inwardly screw screw press 11 compress auxiliary pressure adjusting spring 8 increase elastic force or outwards release screw press 11 reduce elastic force, again in conjunction with the control of magnetic rheological liquid viscous resistance, just can to realize on a large scale, stepless, continuous print main valve Stress control.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (7)
1. a magnetorheological pilot valve, comprises magnetorheological pilot poppet valve spool (1), front shroud (3), magnetorheological pilot valve piston (5), electromagnetic coil and iron core (6), magnetorheological pilot valve body (7), assists pressure adjusting spring (8), screw press (11), check valve sheet (15), overcurrent plate (14), briquetting (12);
It is characterized in that: the valve rod of magnetorheological pilot poppet valve spool (1), through front shroud (3), is fit in magnetorheological pilot valve body (7), and with magnetorheological pilot valve piston (5) compact siro spinning technology; Forming the working clearance (16) between magnetorheological pilot valve piston (5), magnetorheological pilot valve body (7), electromagnetic coil and iron core (6) makes magnetic rheological liquid (13) flow; Magnetorheological pilot valve piston (5) and magnetorheological pilot valve body (7) and electromagnetic coil and iron core (6) are high permeability material; Form space between the valve rod of overcurrent plate (14) and magnetorheological pilot poppet valve spool (1), check valve sheet (15) can in this space resiliently deformable; Rotate briquetting (12) compression or the auxiliary pressure adjusting spring (8) of release that auxiliary screw press (11) can promote its front end.
2. magnetorheological pilot valve according to claim 1, is characterized in that: the main valve be connected with described magnetorheological pilot valve is applicable to the Hydraulic Power Transmission System that working medium is normal hydraulic oil; In magnetorheological pilot valve, working medium is magnetic flow liquid, and magnetic rheological liquid is enclosed in magnetorheological pilot valve, and volume is at 30-150ml.
3. magnetorheological pilot valve according to claim 1, is characterized in that: the width of the working clearance formed between described magnetorheological pilot valve piston (5) and electromagnetic coil and iron core (6) is 0.3-3mm, and length is 6-60mm.
4. magnetorheological pilot valve according to claim 1, it is characterized in that: described magnetorheological pilot valve piston (5) is near a central position uniform 3-6 through flow hole (17), and through flow hole (17) centre distance magnetorheological pilot valve piston (5) outer round surface radial distance is greater than 5mm.
5. magnetorheological pilot valve according to claim 4, it is characterized in that: described magnetorheological pilot valve piston (5) is provided with described check valve sheet (15) and overcurrent plate (14) with the end face at magnetorheological pilot poppet valve spool (1) opposite direction place, check valve sheet (15) is made up of elastic material, resiliently deformable can be produced in space between overcurrent plate (14) and piston (5) end face, close or open through flow hole (17).
6. magnetorheological pilot valve according to claim 1, is characterized in that: the briquetting (12) and the screw rod (11) that have the pretightening force of auxiliary pressure adjusting spring (8) and the auxiliary pressure adjusting spring (8) of adjustment described in the installation of described magnetorheological pilot valve body (7) side.
7. magnetorheological pilot valve according to claim 2, is characterized in that: the regulation range of described main valve working pressure is 1-40MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520098105.5U CN204512040U (en) | 2015-02-11 | 2015-02-11 | Magnetorheological pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520098105.5U CN204512040U (en) | 2015-02-11 | 2015-02-11 | Magnetorheological pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204512040U true CN204512040U (en) | 2015-07-29 |
Family
ID=53710022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520098105.5U Expired - Fee Related CN204512040U (en) | 2015-02-11 | 2015-02-11 | Magnetorheological pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204512040U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632744A (en) * | 2015-02-11 | 2015-05-20 | 华侨大学 | Magneto-rheological pilot valve |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
-
2015
- 2015-02-11 CN CN201520098105.5U patent/CN204512040U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632744A (en) * | 2015-02-11 | 2015-05-20 | 华侨大学 | Magneto-rheological pilot valve |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104633233A (en) | Overflow valve with magneto-rheological pilot valve | |
| CN104632745A (en) | Sequence valve with magneto-rheological pilot valve | |
| CN204512040U (en) | Magnetorheological pilot valve | |
| CN104632744A (en) | Magneto-rheological pilot valve | |
| CN201068843Y (en) | Electrohydraulic load pressure flow control variable plunger pump | |
| CN201531483U (en) | Single-acting fast closing/double-acting boosting hydraulic cylinder | |
| CN204512602U (en) | Use the relief valve of magnetorheological pilot valve | |
| CN206496055U (en) | A kind of overflow valve based on magnetic rheology effect | |
| CN105042141A (en) | Piston self-operated regulating valve | |
| CN104930017A (en) | Hydraulic device capable of adjusting buffer energy on two ends | |
| CN203009946U (en) | Water hammer discharge valve | |
| CN203098720U (en) | Double-outlet-rod ring-shaped magnetic steel piston magneto-rheological damper | |
| CN201013814Y (en) | Open type oil cylinder of full hydraulic disc spring resetting constant braking inter space | |
| CN204512039U (en) | Use the sequence valve of magnetorheological pilot valve | |
| CN201502761U (en) | Pressure reducing valve with composite valve | |
| CN103047457A (en) | Water hammer discharge valve | |
| CN2591359Y (en) | Damping wear resisting non-return valve | |
| CN201706041U (en) | Two-position and three-way high flow rate high-speed valve | |
| CN201902387U (en) | Hydraulic cylinder with hydraulic control butterfly valve | |
| CN203067873U (en) | Super high pressure normally-closed type air control stop valve | |
| CN201531476U (en) | Magnetorheological fluid pilot operated type relief valve | |
| CN203702941U (en) | Dual-slope disc brake control system for petroleum drilling machine | |
| CN203614835U (en) | Plate type overflow valve | |
| CN209892555U (en) | Bidirectional speed regulation hydraulic control system based on hydraulic cylinder negative load oil return cavity | |
| CN203836337U (en) | Oil inlet valve body of load-sensitive multi-way valve of mini-excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160211 |