CN1128301C - Magneto-rheologic fluid damper - Google Patents
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- CN1128301C CN1128301C CN 00114515 CN00114515A CN1128301C CN 1128301 C CN1128301 C CN 1128301C CN 00114515 CN00114515 CN 00114515 CN 00114515 A CN00114515 A CN 00114515A CN 1128301 C CN1128301 C CN 1128301C
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Abstract
The present invention relates to a novel magneto-rheologic fluid damper which limits a sensitive magnetic field response material namely a solid-phase powder material larger than the submicron level in an inner space area formed by a filter and the magneto-rheologic fluid damper. After the carrier of the solid-phase powder material in magneto-rheologic fluid flows into the inner space area, the carrier forms local magneto-rheologic fluid with the solid-phase powder material stored in the inner space area. The solid-phase powder material stored in the inner space area and the carrier of the solid-phase powder material are separated after passing through the filter, and the carrier flows out from the area. The method and the damper completely avoid the problems of the phase separation, the abrasion and the ageing of the magneto-rheologic fluid, and the pollution and abrasion of the solid-phase powder material to application devices, etc. The present invention has the advantages of low cost, high reliability and strong aging resistance, and enhances the magneto-rheologic effect by 5 to 80 times. The used magneto-rheologic fluid damper is also suitable for generally traditional magneto-rheologic fluid application devices.
Description
The present invention relates to a kind of magneto-rheological fluid damping device.It will be greater than the magnetic responsiveness smart material of submicron order---and solid-phase powder material is limited in by in filter and the zone, the formed inner space of magnetorheological fluid damper, after the carrier of described magneto-rheological fluid solid-phase powder material flows into zone, above-mentioned inner space, the solid-phase powder material that stores promptly and in this zone, inner space forms the local magneto-rheological fluid, separate with the carrier of this solid-phase powder material by the solid-phase powder material that stores in this zone, inner space behind the filter, carrier flows out this zone, inner space.This method and device thereof have been avoided the phase-splitting, wearing and tearing, aging and the solid-phase powder material of using device polluted and problem such as abrasion of magneto-rheological fluid fully.Cost reduces, and reliability improves, and ageing resistance strengthens, and magnetic rheology effect can be improved 5 to 80 times.Wherein used magnetorheological fluid damper also is applicable to general traditional magneto-rheological fluid application device.
Be different from the magnetic fluid stabilising system, magneto-rheological fluid is a kind of magnetic responsiveness smart material that is suspended with in fluid carrier---the astable system of functional mixture material of solid-phase powder material.Adding under the action of a magnetic field rheological properties generation notable change of its fluid itself.The granularity of generally speaking, magnetic responsiveness smart material in the magnetic fluid stabilising system---solid-phase powder material is a submicron order (10
-9M), and the granularity of magnetic responsiveness smart material-solid-phase powder material is a micron order to several millimeters in the astable system of magneto-rheological fluid, and is promptly big by 10
3To 10
6Times, thereby quantitative change has caused the variation of matter on the characteristic.Apparently, the apparent viscosity of the astable system of magneto-rheological fluid becomes 10 under the externally-applied magnetic field effect
1To 10
8Doubly change, but notable change is taking place in the astable system rheological properties of magneto-rheological fluid in fact, but it is, and can be changed into plastomer (Bingham body) under the action of a magnetic field adding, even semi-solid as the free-flow (Newtonian fluid) under no externally-applied magnetic field effect of the astable system of magneto-rheological fluid.People will be called magnetic rheology effect adding the notable change that the astable system rheological properties of magneto-rheological fluid is taken place under the action of a magnetic field.Thereby the astable system of this magneto-rheological fluid (hereinafter to be referred as magneto-rheological fluid) can be used for providing damping adding the rheological properties that is embodied under the action of a magnetic field, as magneto-rheological fluid and device thereof being used for half initiatively energy dissipating of various machinery and building, half active damping, half active buffer, half active shock insulation, become rigidity control, moment of torsion control, industries such as pressure flow pulsation control and pipeline vibration inhibition in the electrohydraulic servo-controlling system are to provide cheap, function admirable, performance and price is compared the high electromechanical integration new high-tech product of full active system.Have great significance in the level of above industry for improving the China and even the world.
Compare with electrorheological fluid, magneto-rheological fluid has its significant advantage: 1) under cheap processing technique condition, do not need to apply strong electrical field; 2) magnetic rheology effect is than the strong at least order of magnitude of electric rheological effect; 3) loose relatively to the requirement of Environmental Conditions condition; 4) existing magnetic technology maturation, soft magnet powder have been produced in enormous quantities etc.But similar to electrorheological fluid, magneto-rheological fluid exists fatal weakness, phase-splitting equally.Phase-splitting is the essential place of the especially astable system of non-colloidal dispersion, mainly be in this system the dispersoid granularity in the dispersion medium greater than due to the submicron order.Though use half initiatively energy dissipating, half active damping, half active buffer, half that the device of magneto-rheological fluid mainly concentrates on various machinery and building initiatively shock insulation, become industry such as pressure flow pulsation control and pipeline vibration inhibition in rigidity control, moment of torsion control, the electrohydraulic servo-controlling system, but industry provides uncertainty because phase-splitting is often given as above, thereby has limited its extensive use.So far in the world also without any an enterprise that produces magneto-rheological fluid and device, company oneself patent and product descritption in deny the deadly defect of magneto-rheological fluid phase-splitting.The present invention proposes the notion of localization and will be imposed in application device at this, thereby specifies as follows.
Magneto-rheological fluid and damping device thereof such as world patent WO94/00704 " MAGNETORHEOLOGICALFLUID DEVICES " (magneto-rheological fluid device) and world patent WO98/00653 " CONTROLLABLEVIBRATION APPARATUS " (controlled shake unit), all there is the shortcoming of the following aspects in their employed magneto-rheological fluids: (one) phase-splitting, growth along with standing time, in the magneto-rheological fluid greater than the solid-phase powder material of submicron order can with the fluid carrier phase-splitting, though on well-beaten basis, its magnetic rheology effect is of slight difference, but use often for great majority and bring inconvenience, fully stir once more so that its homogeneous phase otherwise have only; (2) to using the abrasion of system, owing to be suspended in solid-phase powder material metal and its alloy often in the magneto-rheological fluid, they circulate in the application system high speed with its carrier, make system and use the components and parts abrasion, influence working life; (3) the magneto-rheological fluid ageing resistance is poor, because in order to improve the physical stability of magneto-rheological fluid, the solid-phase powder material in the magneto-rheological fluid is of a size of micron order, along with the increase of solid-phase powder material surface oxidising layer thickness, magnetic rheology effect weakens, and it is poor to embody its ageing resistance; (4) cost height, for physics and the chemical stability of improving magneto-rheological fluid, high-quality powder valency height when using, often needs a large amount of magneto-rheological fluids and a large amount of high-quality powders in the large-scale circulatory system, thereby the cost height; (5) well-known, in certain volume percentage, magnetic rheology effect significantly increases with the increase of magnetic percent by volume, but under the prerequisite that flowability requires, the percent by volume of the solid-phase powder material that is added can not be too high, though magnetic rheology effect is than the strong order of magnitude of electric rheological effect, still seem a little less than some for some application; (6) under the prerequisite that flowability requires, generally must add surface active agent, but,, thereby bring corrosion for application device and relevant Sealing as acid surface active agent and basic surface Active agent etc. because the surface active agent that is added is a polar material; (7) use magneto-rheological fluid in large-scale application device and system, often need a large amount of magneto-rheological fluids, from the anti-dust pollution progression of the circulatory system, magneto-rheological fluid is " dirty oil " (dirty oil), obviously is a kind of artificial dust pollution; (8) although the remanent magnetism of soft magnetic material, especially soft magnet powder is less, but for some soft magnet powder, as the carbon steel powder, remanent magnetism still can not go to disregard, and the streaming potential in the circulatory system must cause electromagnetic pollution.
Purpose of the present invention is intended to the shortcoming that exists at above-mentioned prior art, and a kind of magnetic responsiveness smart material that makes greater than submicron order is provided---solid-phase powder material localization and form a kind of magneto-rheological fluid damping device.
The principle that realizes the object of the invention is: will be greater than the magnetic responsiveness smart material of submicron order---solid-phase powder material is limited in by in filter A, B and the zone, the formed inner space of magnetorheological fluid damper C.After the carrier of described local magneto-rheological fluid solid-phase powder material flows into above-mentioned inner space, the solid-phase powder material that stores promptly and in this inner space forms the local magneto-rheological fluid, adding under the action of a magnetic field, the rheological properties generation notable change of magneto-rheological fluid, flow one timing as the magnetorheological fluid damper C that flows through, upstream at magnetorheological fluid damper C just produces additional pressure, if keep the upstream pressure of magnetorheological fluid damper C constant, then the flow by magnetorheological fluid damper C reduces, separate with the carrier of this solid powder by the solid-phase powder material that stores in this inner space after the filter B, carrier flows out this inner space, in like manner, during reverse flow, separate with the carrier of this solid powder by the solid-phase powder material that stores in this inner space behind the filter A, carrier flows out this inner space.
The concrete device of realizing the object of the invention is: a kind of magneto-rheological fluid damping device, form by piston and rod member, magnetorheological fluid damper, fastening and Sealing; Piston and rod member are made up of piston rod and piston, and the piston cavity that is provided with on piston is used to be provided with magnetorheological fluid damper; Magnetorheological fluid damper is made up of last magnet case, following magnet case, magnet case plate washer, o and o lead-in wire; Fastening and Sealing is made up of gland, snap ring, combination seal; Magnetorheological fluid damper in the magneto-rheological fluid damping device is a plug-in type; After the magnetorheological fluid damper plug-in mounting is gone into piston cavity, form a cavity, form a cavity again in piston cavity lower end and magnetorheological fluid damper lower end in piston cavity upper end and magnetorheological fluid damper upper end; In the cavity that the upper end constituted of piston cavity upper end and magnetorheological fluid damper, placed the filter core that Sealing is equipped with at two ends, this filter core is divided into two this cavity, constituted a filter, one end cavity of this filter communicates with the runner on the adjacent magnetorheological fluid damper, and the other end cavity communicates with the end of piston; In the cavity that the lower end constituted of piston cavity lower end and magnetorheological fluid damper, also placed the filter core that Sealing is equipped with at two ends, this filter core is divided into two this cavity, constituted another filter, one end cavity of this filter communicates with the runner on the adjacent magnetorheological fluid damper, and the other end cavity communicates with the other end of piston; In two filter cavitys that are communicated with by the magnetorheological fluid damper inner flow passage and magnetorheological fluid damper inner flow passage, soft magnet powder is housed; O lead channels on the while magnetorheological fluid damper communicates with the lead channels on piston and the rod member and with Sealing lead channels and magneto-rheological fluid is separated; Magnetic shield, seal ring and combination seal are isolated with o and magneto-rheological fluid; Simultaneously magnetic shield also with o and magnet case baffle plate every magnetic.
But the plug-in type magnetorheological fluid damper in the described magneto-rheologic fluid damper, form by last magnet case, following magnet case, magnet case baffle plate, o, the magnet case baffle plate is positioned between the magnetic pole of magnet case and following magnet case, the pole parts of magnet case baffle plate, last magnet case and following magnet case lays respectively at the inner chamber of o, o is arranged in magnet case and the formed internal cavity of following magnet case, and last magnet case and following magnet case are that nesting type is fastenedly connected; Be provided with runner on the last magnet case, this runner is one group of circular port or one group of waist shaped hole; Be provided with its end face and the parallel magnetic pole of magnet case baffle plate end face on the last magnet case, go up magnet case magnetic pole outer simultaneously and circumferentially be provided with the solenoidal circular groove of seal ring, magnetic shield and built-in electromagnetic is housed; Between end of last magnet case and the solenoidal cavity of built-in electromagnetic, be equipped with a lead channels that o is drawn; Be provided with runner on the following magnet case, this runner is one group of circular port or one group of waist shaped hole; Be provided with its end face and the parallel magnetic pole of magnet case baffle plate end face on the following magnet case, magnet case magnetic pole outer circumferentially is provided with the circular groove that seal ring, magnetic shield are housed at present together; Be positioned at magnetic shield and go up magnet case baffle plate between the magnetic pole of magnet case and following magnet case for being fastenedly connected the location, on the magnet case baffle plate, be provided with simultaneously the runner of the magnetic gap runner connection that will be positioned at magnet case baffle plate both sides, this runner is positioned at the central authorities of magnet case baffle plate, and its axis is not parallel to magnet case baffle plate side; Described magnetic shield serves as the skeleton of o and is arranged in magnet case and the formed internal cavity of following magnet case, and the magnetic shield two ends cooperate by seal ring and last magnet case and circular groove in the following magnet case respectively; Magnetic shield, two seal rings and combination seal are isolated with o and magneto-rheological fluid; Simultaneously magnetic shield also with o and magnet case baffle plate every magnetic; Magnetic shield with the magnet case baffle plate respectively with last magnet case and following magnet case every magnetic.
In the described magneto-rheological fluid damping device, described filter core is by the porous material that certain intensity is arranged, as the mixture thermal sintering tubing by copper powder, iron powder, Stainless Steel Powder, aluminium and alloyed powder thereof, above various powders.
In the described magneto-rheological fluid damping device, piston stroke is long in design, for requiring when loose of piston axial dimension, there is no need the o in described filter and the magnetorheological fluid damper along superimposed on the axial direction of magnetorheological fluid damper; Piston stroke is short in design, during strict limited piston axial dimension, with o in described filter and the magnetorheological fluid damper along superimposed on the axial direction of magnetorheological fluid damper.
In the described magneto-rheological fluid damping device, when in magnetorheological fluid damper, utilizing every the magnetic pressure ring and descending every the magnetic pressure ring, processed tight cover in the pole end piece of last magnet case and installed circular groove every the magnetic pressure ring, the pole end piece of magnet case down processed tight cover install under every the circular groove of magnetic pressure ring; Go up the inner chamber that lays respectively at magnetic shield every the magnetic pressure ring, down every magnetic pressure ring and magnet case baffle plate; Go up every the magnetic pressure ring and lay respectively at magnet case baffle plate both sides and press with its side every the magnetic pressure ring down, the magnet case baffle plate that will be positioned between the magnetic pole of magnet case and following magnet case on the magnetic shield is fastenedly connected the location; Go up every magnetic pressure ring and the following runner that is communicated with the runner of last magnet case and following magnet case magnetic pole piece office that is provided with respectively on the magnetic pressure ring, runner number and the shape with last magnet case and following magnet case magnetic pole piece office is consistent respectively with shape for the number of its runner; All make every the magnetic pressure ring with following but go up by the NULL of bearing certain pressure every the magnetic pressure ring.
In the described magneto-rheological fluid damping device, when not using every the magnetic pressure ring in magnetorheological fluid damper and during down every the magnetic pressure ring, can adopting constantly under leakage field prerequisite, the weldering welding be fastenedly connected the location with magnet case baffle plate and magnetic shield.
In the described magneto-rheological fluid damping device, magnetic shield is a tubular, but is made by the NULL of bearing certain pressure.
Advantage of the present invention is being: (one) has avoided the phase-splitting problem of magneto-rheological fluid in system fully; (2) greatly suppressed magneto-rheological fluid to using the abrasion of element and system; (3) owing to can adopt large-sized magnetic responsiveness smart material---solid-phase powder material, the magneto-rheological fluid ageing resistance strengthens greatly; (4) there is no need to prepare submicron order magnetic responsiveness smart material---solid-phase powder material for the physical stability of improving magneto-rheological fluid; (5) magnetic responsiveness smart material---the consumption of solid-phase powder material is few, and cost is low; (6) on the basis of not improving general magneto-rheological fluid cost, can adopt high-quality, the quick material of high-performance magnetic field responder---solid-phase powder material; (7) owing to can increase the magnetic responsiveness smart material---solid-phase powder material is in the volume fraction of local, thereby can significantly improve the magnetic rheology effect of magneto-rheological fluid; (8) also having reduced the magnetic responsiveness smart material simultaneously---solid-phase powder material pollutes for the powder of application system; (9) the more important thing is, the piston assembly of built-in magnetorheological fluid damping device in magneto-rheological fluid half active oil pressure vibration damping, antidetonation, energy dissipating and damping device, make the carrier of the piston assembly of this magneto-rheological fluid damping device of inflow and outflow not contain magnetic responsiveness smart material---solid-phase powder material greater than submicron order, if there is not magnetic responsiveness smart material in the carrier less than submicron order---during solid-phase powder material, should be pure fluid; (10) realized the adjustable continuously of damping simultaneously, avoided that the large particle metal has prolonged the working life of oil-pressure damper for the erosion of Sealing in the magneto-rheological fluid.
Below with reference to the structural principle among Fig. 1, Fig. 2 and Fig. 3 in detail principle of the present invention is described in detail.
Fig. 1 magneto-rheological fluid damping device of the present invention schematic diagram
One of Fig. 2 magnetorheological fluid damper schematic diagram (interior formula)
Two (outer formulas) of Fig. 3 magnetorheological fluid damper schematic diagram
One of Fig. 4 magneto-rheological fluid damping device of the present invention structure diagrammatic sketch
Two diagrammatic sketch of Fig. 5 magneto-rheological fluid damping device of the present invention structure
Fig. 6 magneto-rheological fluid damping device of the present invention is used for vehicle with magneto-rheological fluid half vertical oil-pressure damper configuration diagram initiatively
Fig. 7 magneto-rheological fluid damping device of the present invention is used for vehicle with magneto-rheological fluid half active lateral oil-pressure damper configuration diagram
With reference to Fig. 1, make magnetic responsiveness smart material greater than submicron order---solid-phase powder material localization and the principle that forms a kind of magneto-rheological fluid damping device are: will greater than the magnetic responsiveness smart material of submicron order---solid-phase powder material is limited in by in filter B and the zone, the formed inner space of magnetorheological fluid damper C (unidirectional), or will be limited in greater than magnetic responsiveness smart material one solid-phase powder material of submicron order by in filter A, B and the zone, the formed inner space of magnetorheological fluid damper C (two-way).After the carrier of described magneto-rheological fluid solid-phase powder material flows into above-mentioned inner space, the solid-phase powder material that stores promptly and in this inner space forms magneto-rheological fluid, adding under the action of a magnetic field, the rheological properties generation notable change of magneto-rheological fluid, flow one timing as the magnetorheological fluid damper C that flows through, upstream at magnetorheological fluid damper C just produces additional pressure, if keep the upstream pressure of magnetorheological fluid damper C constant, then the flow by magnetorheological fluid damper C reduces, separate with the carrier of this solid powder by the solid-phase powder material that stores in this inner space after the filter B, carrier flows out this inner space (unidirectional), in like manner, during reverse flow, separate with the carrier of this solid powder by the solid-phase powder material that stores in this inner space behind the filter A, carrier flows out this inner space (two-way).
With reference to Fig. 2, Fig. 3, formula o in the 1-wherein; Formula magnetic pole one in the 2-; Formula magnetic pole two in the 3-; Formula magnet case in the 4-; The outer formula magnetic pole of 5--; The outer formula magnetic pole two of 6-; The outer formula magnetic core of 7-; The outer formula magnetism resistent ring of 8-; The outer formula magnetic guiding loop of 9-; The outer formula o of 10-.Described damper is made of the air gap D in magnetic field and the magnetic field, when the magnetic responsiveness smart material---when solid-phase powder material passes through air gap D with its carrier, as long as flow direction is not parallel with the magnetic direction that is acted on, under the action of a magnetic field, magnetic responsiveness smart material in the magneto-rheological fluid---solid-phase powder material is reunited at the magnetic pole near zone, thereby generation magnetic rheology effect, the rheological properties generation notable change of magneto-rheological fluid, flow one timing as the magnetorheological fluid damper C that flows through, upstream at magnetorheological fluid damper C just produces additional pressure, if keep the upstream pressure of magnetorheological fluid damper C constant, then the flow by magnetorheological fluid damper C reduces, and filter A (if unidirectional is established) is established in the import of solid powder carrier and outlet in the magneto-rheological fluid.
Below with reference to the auspicious concrete structure of realizing above magneto-rheological fluid damping device principle of stating of Fig. 4～Fig. 7.
With reference to Fig. 4, one of magneto-rheological fluid damping device structure is made of following components and parts: but piston and rod member 23 plug-in type magnetorheological fluid dampers, filter, fastening and Sealing four parts are formed; Wherein piston and rod member 23 are made up of piston rod and piston, are provided with piston cavity on piston, but are used for plug-in mounting plug-in type magnetorheological fluid damper; But and the plug-in type magnetorheological fluid damper by last magnet case 29, down magnet case 37, magnet case plate washer 36, o 35, o lead-in wire 25, magnetic shield 32, go up every magnetic pressure ring 33, form every magnetic pressure ring 38, seal ring 31, seal ring 39 and combination seal 40 down; Filter is divided into filter and following filter, last filter is to be made of with relevant last magnet case 29 end outer surface last tubular sintered filter core 28, seal ring 27, seal ring 30, relevant piston cavity internal surface, and following filter is by tubular sintered filter core 42, seal ring 41, seal ring 43, relevant piston cavity internal surface, relevant following magnet case 37 end outer surface constitute with relevant gland surface down; Fastening and Sealing is made up of gland 44, snap ring 45, combination seal 26 and combination seal 34.
Be provided with radially turnover runner on the last magnet case 29 along its radial equipartition, the runner that radially passes in and out of its radial equipartition communicates in twos with radially uniform axial turnover runner respectively, be provided with magnetic pole on the last magnet case 29, its end face is parallel with the end face of magnet case baffle plate 36, go up simultaneously and be provided with the circular groove of installing every magnetic pressure ring 33 on the magnet case 29, the outside of this circular groove is provided with three circular grooves that distribute along circumferentially, one is used to be provided with seal ring 31, it two is used to be provided with magnetic shield 32, it three is used for built-in electromagnetic solenoid 35, simultaneously on last magnet case 29, be provided with two steps, one makes tubular sintered filter core 28 location, it two is passed to preload pressure and fluid pressure action power piston and rod member 23 and combination seal 26 is installed, for o lead-in wire 25 is drawn, between the circular groove of end of last magnet case 29 and built-in electromagnetic solenoid 35, beaten a passage, thereby by with the lead fairlead on upper channel and piston and the rod member 23 o lead-in wire 25 being drawn.
Radially turnover runner along its radial equipartition is also arranged on the following magnet case 37, the runner that radially passes in and out of its radial equipartition communicates in twos with radially uniform axial turnover runner respectively, be provided with magnetic pole on the following magnet case 37, its end face is parallel with the end face of magnet case baffle plate 36, be provided with the circular groove of installation on the following magnet case 37 simultaneously every magnetic pressure ring 38, the outside of this circular groove is provided with two circular grooves that distribute along circumferentially, one is used to be provided with seal ring 39, it two is used to be provided with magnetic shield 32, magnet case 37 is provided with two steps down simultaneously, one is used to make down tubular sintered filter core 42 location, it two is used for preload pressure and fluid pressure action power are passed to gland 44, by snap ring 45 power is passed to piston and rod member 23 again.
Go up every magnetic pressure ring 33 and on magnetic pressure ring 38, be provided with radially uniform shaft orientation flowing channel respectively down, and communicate with runner on last magnet case 29 and the following magnet case 37 respectively; Circumferentially uniform axial turnover runner is arranged respectively on piston and rod member 23 and the gland 44.
The assembly relation of one of Fig. 4 magneto-rheological fluid damping device structure is: the good o 35 of coiling on magnetic shield 32 at first, pack to descend it into magnet case 37 together with seal ring 39, put combination seal 40, in magnetic shield 32, be inserted in F every magnetic pressure ring 38, magnet case baffle plate 36 and on every magnetic pressure ring 33, formed assembly one; Secondly after putting seal ring 31 on the last magnet case 29, o gone between and 25 draw again by the lead-in wire duct on the magnet case 29 and to match with above assembly one, thereby formed assembly two, make the last magnet case 29 that is in o 35 inside and the inner end of following magnet case 37 form magnetic pole and magnetic field air gap thus, this magnetic field air gap by last every magnetic pressure ring 33, magnet case baffle plate 36 with time be divided into two every magnetic pressure ring 38.Under o 35 the action of a magnetic fields, two magnetorheological fluid dampers that are in series have just been formed.Put into seal ring 27 for 23 li at one-piece piston and rod member, pack into then and go up tubular sintered filter core 28, on said modules two, put combination seal 26, seal ring 30 and seal ring 41 respectively, again it is packed into 23 li of one-piece piston and rod members, to descend tubular sintered filter core 42 to be inserted on the said modules two that seal ring 41 is housed then, secondly seal ring 43 is inserted in behind the gland 44 it is packed into according to this 23 li of one-piece piston and rod members, the snap ring 45 of packing into when pressing gland 44.
Magneto-rheological fluid area of space in one of Fig. 4 magneto-rheological fluid damping device structure is to be made of the piston cylinder inwall of outer shroud side, one-piece piston and the rod member 23 of last tubular sintered filter core 28 and following tubular sintered filter core 42 and runner, the air gap in the magnetorheological fluid damper, in this space soft magnet powder is housed.
With reference to Fig. 5, two of magneto-rheological fluid damping device structure is on the basis of Fig. 4 structure, has cancelled and having gone up every magnetic pressure ring 33 with down every magnetic pressure ring 38, and adopted magnet case baffle plate 36 and magnetic shield 32 welded structures, and the structure of other part is constant.
Two assembly relation of Fig. 5 magneto-rheological fluid damping device structure is: at first in magnetic shield 32 endoporus neutral positions magnet case baffle plate 36 is welded mutually with magnetic shield 32, guarantee not leakage field, constantly weldering, the good o 35 of coiling on magnetic shield 32 then, pack to descend it into magnet case 37 together with seal ring 39, put seal ring 40, formed assembly one; Other is analogous to Fig. 4.
Fig. 6 is that one of magneto-rheological fluid damping device of the present invention is used for vehicle with magneto-rheological fluid half vertical oil-pressure damper initiatively.The magneto-rheological fluid of Fig. 6 half initiatively vertical oil-pressure damper is to be made of screw 10, locking dog chart 11, elastic washer 12, dust ring 13, rod seal 14, end snap ring 15, rod seal 16, platen 17, guide sleeve 18, cylinder barrel 19, end seal 20, end seal 21, upper end cap 22, safety cover 24, nitrogen capsule 46, lower end cap assembly 47 and magneto-rheological fluid damping device.
Fig. 7 is that two of magneto-rheological fluid damping device of the present invention is used for vehicle with magneto-rheological fluid half active lateral oil-pressure damper.The magneto-rheological fluid half active lateral oil-pressure damper of Fig. 7 is to be made of locking dog chart 100, screw 101, elastic washer 102, safety cover 103, dust ring 104, rod seal 105, rod seal 106, platen 107, guide sleeve 108, end seal 109, upper end cap 110, end seal 111, inner cylinder tube 112, outer cylinder 113, following valve body 137, valve body snap ring 138, volute spring 139, valve block 140, lower end cap assembly 141 and magneto-rheological fluid damping device.
Claims (6)
1, a kind of magneto-rheological fluid damping device is made up of piston and rod member, magnetorheological fluid damper, fastening and Sealing; Piston and rod member are made up of piston rod and piston, and the piston cavity that is provided with on piston is used to be provided with magnetorheological fluid damper; Magnetorheological fluid damper is made up of last magnet case, following magnet case, magnet case plate washer, o and o lead-in wire; Fastening and Sealing is made up of gland, snap ring, combination seal, and it is characterized in that: magnetorheological fluid damper is a plug-in type; After the magnetorheological fluid damper plug-in mounting is gone into piston cavity, form a cavity, form a cavity again in piston cavity lower end and magnetorheological fluid damper lower end in piston cavity upper end and magnetorheological fluid damper upper end; In the cavity that the upper end constituted of piston cavity upper end and magnetorheological fluid damper, placed the filter core that Sealing is equipped with at two ends, this filter core is divided into two this cavity, constituted a filter, one end cavity of this filter communicates with the runner on the adjacent magnetorheological fluid damper, and the other end cavity communicates with the end of piston; In the cavity that the lower end constituted of piston cavity lower end and magnetorheological fluid damper, also placed the filter core that Sealing is equipped with at two ends, this filter core is divided into two this cavity, constituted another filter, one end cavity of this filter communicates with the runner on the adjacent magnetorheological fluid damper, and the other end cavity communicates with the other end of piston; In two filter cavitys that are communicated with by the magnetorheological fluid damper inner flow passage and magnetorheological fluid damper inner flow passage, soft magnet powder is housed; O lead channels on the while magnetorheological fluid damper communicates with the lead channels on piston and the rod member and with Sealing lead channels and magneto-rheological fluid is separated; Magnetic shield, seal ring and combination seal are isolated with o and magneto-rheological fluid; Simultaneously magnetic shield also with o and magnet case baffle plate every magnetic; But described plug-in type magnetorheological fluid damper, form by last magnet case, following magnet case, magnet case baffle plate, o, the magnet case baffle plate is positioned between the magnetic pole of magnet case and following magnet case, the pole parts of magnet case baffle plate, last magnet case and following magnet case lays respectively at the inner chamber of o, o is arranged in magnet case and the formed internal cavity of following magnet case, and last magnet case and following magnet case are that nesting type is fastenedly connected; Be provided with runner on the last magnet case, this runner is one group of circular port or one group of waist shaped hole; Be provided with its end face and the parallel magnetic pole of magnet case baffle plate end face on the last magnet case, go up magnet case magnetic pole outer simultaneously and circumferentially be provided with the solenoidal circular groove of seal ring, magnetic shield and built-in electromagnetic is housed; Between end of last magnet case and the solenoidal cavity of built-in electromagnetic, be equipped with a lead channels that o is drawn; Be provided with runner on the following magnet case, this runner is one group of circular port or one group of waist shaped hole; Be provided with its end face and the parallel magnetic pole of magnet case baffle plate end face on the following magnet case, magnet case magnetic pole outer circumferentially is provided with the circular groove that seal ring, magnetic shield are housed at present together; Be positioned at magnetic shield and go up magnet case baffle plate between the magnetic pole of magnet case and following magnet case for being fastenedly connected the location, on the magnet case baffle plate, be provided with simultaneously the runner of the magnetic gap runner connection that will be positioned at magnet case baffle plate both sides, this runner is positioned at the central authorities of magnet case baffle plate, and its axis is not parallel to magnet case baffle plate side; Described magnetic shield serves as the skeleton of o and is arranged in magnet case and the formed internal cavity of following magnet case, and the magnetic shield two ends cooperate by seal ring and last magnet case and circular groove in the following magnet case respectively; Magnetic shield, two seal rings and combination seal are isolated with o and magneto-rheological fluid; Simultaneously magnetic shield also with o and magnet case baffle plate every magnetic; Magnetic shield with the magnet case baffle plate respectively with last magnet case and following magnet case every magnetic.
2, magneto-rheological fluid damping device according to claim 1 is characterized by: described filter core is by the porous material that certain intensity is arranged, as the mixture thermal sintering tubing by copper powder, iron powder, Stainless Steel Powder, aluminium and alloyed powder thereof, above various powders.
3, magneto-rheological fluid damping device according to claim 1, it is characterized by: requiring when loose in design for the piston axial dimension, along on the axial direction of magnetorheological fluid damper, the relative position of o does not have overlaying relation in described filter and the magnetorheological fluid damper; When the piston axial dimension was subjected to strict restriction in the design, along on the axial direction of magnetorheological fluid damper, the relative position of o had overlaying relation in described filter and the magnetorheological fluid damper.
4, magneto-rheological fluid damping device according to claim 1, it is characterized in that: when in magnetorheological fluid damper, utilizing every the magnetic pressure ring and descending every the magnetic pressure ring, processed tight cover in the pole end piece of last magnet case and installed circular groove every the magnetic pressure ring, the pole end piece of magnet case down processed tight cover install under every the circular groove of magnetic pressure ring; Go up the inner chamber that lays respectively at magnetic shield every the magnetic pressure ring, down every magnetic pressure ring and magnet case baffle plate; Go up every the magnetic pressure ring and lay respectively at magnet case baffle plate both sides and press with its side every the magnetic pressure ring down, the magnet case baffle plate that will be positioned between the magnetic pole of magnet case and following magnet case on the magnetic shield is fastenedly connected the location; Go up every magnetic pressure ring and the following runner that is communicated with the runner of last magnet case and following magnet case magnetic pole piece office that is provided with respectively on the magnetic pressure ring, runner number and the shape with last magnet case and following magnet case magnetic pole piece office is consistent respectively with shape for the number of its runner; All make every the magnetic pressure ring with following but go up by the NULL of bearing certain pressure every the magnetic pressure ring.
5, magneto-rheological fluid damping device according to claim 1, it is characterized in that: when not using every the magnetic pressure ring in magnetorheological fluid damper and during down every the magnetic pressure ring, can adopting constantly under leakage field prerequisite, the weldering welding be fastenedly connected the location with magnet case baffle plate and magnetic shield.
6, magneto-rheological fluid damping device according to claim 1 is characterized in that: magnetic shield is a tubular, but is made by the NULL of bearing certain pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114515 CN1128301C (en) | 2000-04-24 | 2000-04-24 | Magneto-rheologic fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00114515 CN1128301C (en) | 2000-04-24 | 2000-04-24 | Magneto-rheologic fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1320779A CN1320779A (en) | 2001-11-07 |
| CN1128301C true CN1128301C (en) | 2003-11-19 |
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ID=4584186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00114515 Expired - Fee Related CN1128301C (en) | 2000-04-24 | 2000-04-24 | Magneto-rheologic fluid damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128301C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7051849B2 (en) * | 2003-10-22 | 2006-05-30 | General Motors Corporation | Magnetorheological fluid damper |
| US20070023245A1 (en) * | 2005-07-29 | 2007-02-01 | The Chinese University Of Hong Kong | Pressurized magnetorheological fluid dampers |
| CN102022472B (en) * | 2010-12-23 | 2012-08-22 | 上海应用技术学院 | Rotary foam metal magnetorheological fluid damper |
| CN104776155B (en) * | 2015-04-27 | 2017-01-11 | 武汉理工大学 | Piston rod protecting sleeve device for prolonging service life of magnetorheological fluid damper |
| CN110107636B (en) * | 2019-04-25 | 2021-02-12 | 江苏大学 | Bidirectional magneto-rheological damping regulating valve |
-
2000
- 2000-04-24 CN CN 00114515 patent/CN1128301C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1320779A (en) | 2001-11-07 |
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