CN104963986B - A kind of MR damper with mixed flow dynamic formula fluid course - Google Patents
A kind of MR damper with mixed flow dynamic formula fluid course Download PDFInfo
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- CN104963986B CN104963986B CN201510410264.9A CN201510410264A CN104963986B CN 104963986 B CN104963986 B CN 104963986B CN 201510410264 A CN201510410264 A CN 201510410264A CN 104963986 B CN104963986 B CN 104963986B
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- end cap
- fluid course
- damper
- magnetic conduction
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
Abstract
The invention discloses a kind of MR damper with mixed flow dynamic formula fluid course, mainly it is made up of piston rod, attenuator end cap, sleeve, piston end cap, valve pocket, valve element, floating piston, magnet exciting coil, positioning disc, magnetic conduction disk and hanger etc..Fluid course between left magnetic conduction disk, valve pocket and valve element constitutes the Ith section and the IIth section of effective damping gap；Fluid course between right magnetic conduction disk and valve element constitutes the IIIth section and the IVth section of effective damping gap；When to magnet exciting coil conduction, a certain size magnetic field will be produced in four sections of effective damping gaps, the magnetic flow liquid viscosity increase of four sections of damping clearances, yield stress enhancing, so as to form pressure differential between damper cavity volume I and cavity volume II is flowed through.By controlling application size of current to realize effective control of damping force.The MR damper damping force dynamic regulation scope is big, simple in construction and small volume, is particularly suitable for use in the isostructural vibration damping vibration prevention system of railway, automobile, bridge.
Description
Technical field
The present invention relates to a kind of MR damper, more particularly to it is a kind of magnetorheological with mixed flow dynamic formula fluid course
Damper.
Background technology
MR damper is a kind of Novel intelligent damper part being widely used in semi-active control aystem.It is main
It is by applying a certain size electric current to the excitation coil in damper piston winding slot, producing magnetic field and pass through liquid circulation
The yield strength of magnetic flow liquid in road changes, so that dynamic changes output damping force.
The characteristics of Millisecond response speed, big control range and the big damping force that MR damper has are exported, makes
Obtaining it turns into half outstanding active actuators part of industrial application.At present, MR damper is in building and bridge
Extensive use is obtained in terms of the vibration damping of vibration damping vibration prevention system, rail vehicles and automobile suspension system.
In vibration control system, MR damper is mainly used to the vibration of control system device generation, meets all kinds of
Requirement of the plant equipment to various operating modes.Therefore the performance of MR damper directly influences quiet, the dynamic spy of various systems
Property and functional reliability, are the core cells in vibration insulating system.With the development of new and high technology, the engineer applied pair of vibration insulating system
The requirement more and more higher of damping element, most of existing MR damper is all the shearing-type damping device of single channel, magnetic current
Become liquid liquid flowing resistance passage be mainly disposed between coil inside and coil and sleeve, it is necessary to ensure magnetic direction with it is magnetorheological
Flowing to for liquid is perpendicular, otherwise cannot reach optimum efficiency；Under the premise of this, also use up the area of liquid flowing resistance passage
May be big, to obtain enough damping forces, therefore its volume is general than larger, and damping force adjustable extent is narrow.
During MR damper structure design, flow direction and magnetic of the magnetic flow liquid in effective damping gap should be made first
Field direction is mutually perpendicular to；Next to that as far as possible lengthening fluid course of the magnetic flow liquid inside MR damper.Current institute
The MR damper of design uses single circular ring type liquid flow damping passage mostly, and is by following two methods
To improve the adjustable extent of MR damper damping force.One is under identical input current, as far as possible in magnetic flow liquid saturation
In the range of improve magnetic induction intensity in effective damping gap.Conventional method is that the damping clearance of reduction MR damper is wide
Degree, but due to magnetic flow liquid be long placed in it is unused enable again when, easily there is particle precipitation so as to blocking damping clearance, cause magnetic current
Mutative damp device fails.Second is exactly to improve effective damping gap length, but can so dramatically increase the volume of MR damper,
Space is installed and used to occupancy more, and manufacturing cost also accordingly increases.
Based on this, in actual design process, it is desirable to while increasing the magnetic induction intensity in effective damping gap and raising
The length in effective damping gap is relatively difficult.Therefore, the MR damper of a kind of performance stabilization and structure relative compact is designed,
The damping force that exports MR damper is bigger, damping force control range is wider, the problem of be industry urgent need to resolve, is also
Further widen the premise of MR damper commercial Application.
The content of the invention
In order to overcome problem present in background technology and meet MR damper actual operation requirements, the present invention is proposed
A kind of MR damper with mixed flow dynamic formula fluid course.The fluid course of the MR damper is in built-up piston
Mixed flow dynamic formula fluid course composition, magnet exciting coil produce magnetic fields under, left magnetic conduction disk, valve pocket and valve element it
Between fluid course constitute the Ith section of axial flow-type damping clearance and the IIth section of radial flow dynamic formula damping clearance；Right magnetic conduction disk
Fluid course between valve element constitutes the IIIth section of radial flow dynamic formula damping clearance and the IVth section of axial flow-type damping clearance；When
When being passed through electric current to magnet exciting coil, a certain size magnetic field will be produced in four sections of damping clearances, flow through the magnetic of four sections of damping clearances
Rheology fluid viscosity increases, yield stress enhancing, so as to form pressure differential between MR damper cavity volume I and cavity volume II.It is logical
Effective control of damping force can be realized by crossing control application size of current.This structure design is sufficiently used walking for the magnetic line of force
To on the premise of damping clearance width is not reduced, increasing effective damping length and the section of shear, it is ensured that damper can
The sufficiently large damping force of output, while will not be resulted in blockage because damping clearance is too narrow.The damping force of the MR damper is moved
State adjustable range is big, simple in construction and small volume, is particularly suitable for use in the isostructural vibration damping vibration prevention system of railway, automobile, bridge.
The technical solution adopted for the present invention to solve the technical problems includes：Piston rod, damper left end cap, sealing ring I,
Sleeve, piston left end cap, screw I, sealing ring II, sealing ring III, valve pocket, sealing ring IV, valve element, screw II, piston right end cap,
Sealing ring V, right hanger, damper right end cap, screw III, floating piston, sealing ring VI, sealing ring VII, slotted countersunk flat head screw I,
It is right magnetic conduction disk, pad I, magnet exciting coil, positioning disc, pad II, slotted countersunk flat head screw II, left magnetic conduction disk, screw IV, close
Seal VIII, fairlead and left hanger；Piston rod left end is connected with left hanger by screw threads for fastening；It is provided with the middle of damper left end cap
Manhole, piston rod coordinates with damper left end cap manhole internal surface gaps, and piston rod is circular with damper left end cap
Through-hole inner surface is sealed by sealing ring VIII；Piston rod right-hand member is machined with the middle of external screw thread, piston left end cap and is machined with spiral shell
Line through hole, piston rod right-hand member is connected with piston left end cap by screw threads for fastening；Damper left end cap is solid by screw IV with sleeve
Fixed connection；Sealed between damper left end cap and sleeve by sealing ring I；Piston left end cap right side and valve pocket left side
Contact, piston left end cap is fixedly connected with valve pocket by screw I；Carried out between piston left end cap and valve pocket by sealing ring II close
Envelope；Valve pocket outer surface coordinates with sleeve interior surface gap, and valve pocket is sealed with sleeve by sealing ring IV；Left magnetic conduction disk with
It is furnished with pad II between positioning disc, the thickness of pad II is 1.0mm；Left magnetic conduction disk, pad II and positioning disc pass through
Slotted countersunk flat head screw II is fixedly connected；Leave and lead to for magnetic flow liquid between left magnetic conduction disk radial peripheral surface and valve pocket inner surface
The radial clearance crossed, radial clearance thickness is 1.0mm；Positioning disc is machined with internal thread through hole, and valve element left end is machined with outer spiral shell
Line, positioning disc and valve element are threadably secured connection；The groove surrounded between positioning disc and valve element constitutes winding slot, excitation
Coil is wrapped in winding slot；Two leads of magnet exciting coil are by the fairlead in valve pocket and the corresponding lead of piston left end cap
Draw, and drawn by the fairlead in piston rod outside damper in hole；Positioning disc and valve pocket radial clearance fit, setting circle
Sealed between disk and valve pocket by sealing ring III；It is furnished with pad I between right magnetic conduction disk and valve element right side, pad I is thick
Spend for 1.0mm；Right magnetic conduction disk, pad I and valve element right side are fixedly connected by slotted countersunk flat head screw I；Right magnetic conduction disk
The radial clearance passed through for magnetic flow liquid is left on the right side of radial peripheral surface and valve element between inner surface, radial clearance thickness is
1.0mm；Piston right end cap left side and the contact of valve element its right end face, piston right end cap radial end face and sleeve interior surface gap are matched somebody with somebody
Close；Sealed between piston right end cap and valve element by sealing ring VII；Piston right end cap, valve element and valve pocket are solid by screw II
Fixed connection；Floating piston outer surface coordinates with sleeve interior surface gap, and floating piston is sealed with sleeve by sealing ring VI；Damping
Device right end cap coordinates with sleeve right side gap, and damper right end cap is fixedly connected with sleeve by screw III；Damper right-hand member
Lid is sealed with sleeve by sealing ring V；Damper right end cap right-hand member is threadably secured with right hanger and is connected.
Closing cavity volume I is surrounded between damper left end cap, sleeve and piston left end cap；Piston right end cap, sleeve and
Closing cavity volume II is surrounded between floating piston；Closing cavity volume III is surrounded between floating piston, sleeve and damper right end cap；Envelope
Close filling magnetic flow liquid in cavity volume I and II；Close filling compressed gas in cavity volume III；When piston rod in axial direction Tensile or
During compression motion, respective change can occur for the volume of closing cavity volume I and II, and now floating piston 18 can be by the left side of axial direction
It is right to float to realize volume compensation.
Built-up piston is right by piston left end cap, screw I, sealing ring II, sealing ring III, valve pocket, valve element, screw II, piston
End cap, sealing ring VII, slotted countersunk flat head screw I, right magnetic conduction disk, pad I, magnet exciting coil, positioning disc, pad II, fluting are heavy
Head screw II and left magnetic conduction disk composition；4 are arranged circumferentially in the middle of piston left end cap through hole A, B, C, D-shaped circulate into liquid
Road I；Fluid course II is formed between piston left end cap right side and the left left side of magnetic conduction disk 28；Left magnetic conduction disk radial circumference
Fluid course III is formed between surface and valve pocket inner surface；Left magnetic conduction disk right side and valve element left side and positioning disc left end
Fluid course IV is formed between face；Manhole E formation fluid course V in the middle of valve element；Valve element right side and right magnetic conduction disk are left
Fluid course VI is formed between end face；On the right side of right magnetic conduction disk radial peripheral surface and valve element fluid course is formed between inner surface
Ⅶ；Fluid course VIII is formed between right magnetic conduction disk right side and piston right end cap left side；4 circumferences in the middle of piston right end cap
Through hole F, G, H, the I being evenly arranged and intermediate throughholes J-shaped are into fluid course Ⅸ；Mixed flow dynamic formula fluid course by fluid course I,
Fluid course II, fluid course III, fluid course IV, fluid course V, fluid course VI, fluid course VII, fluid course VIII
And fluid course Ⅸ is constituted；On the premise of damper monnolithic case size is not changed, this mixed flow dynamic formula fluid course can
It is effectively increased magnetorheological effective damping length；When piston rod Tensile, the magnetic flow liquid in cavity volume I is by built-up piston
Mixed flow dynamic formula fluid course enters cavity volume II；When piston rod is compressed, the magnetic flow liquid in cavity volume II passes through built-up piston
Interior mixed flow dynamic formula fluid course enters cavity volume I.
Left magnetic conduction disk, right magnetic conduction disk, valve pocket and valve element are made up of mild steel permeability magnetic material；Remaining parts are not by
Permeability magnetic material is made.
Fluid course between left magnetic conduction disk, valve pocket and valve element constitutes the Ith section of axial flow-type damping clearance and the
II section of radial flow dynamic formula damping clearance；Fluid course between right magnetic conduction disk and valve element constitutes the IIIth section of radial flow dynamic formula damping
Gap and the IVth section of axial flow-type damping clearance；The thickness of four sections of damping clearances is 1.0mm；When being passed through one to magnet exciting coil
When determining the electric current of size, a certain size magnetic field will be produced in four sections of damping clearances, and the magnetic line of force passes perpendicularly through this four sections resistances
Buddhist nun gap so that flow through the magnetic flow liquid viscosity increase of four sections of damping clearances, yield stress enhancing, so that left in piston left end cap
Pressure differential is formed between the cavity volume I at end and the cavity volume II of piston right end cap right-hand member, applies the size of electric current by changing, be can be achieved
Effective control of MR damper damping force.
The present invention has an advantageous effect in that compared with background technology：
(1) mixed flow dynamic formula fluid course of the fluid course of MR damper of the present invention in built-up piston is constituted.
Under the magnetic fields that magnet exciting coil is produced, the fluid course between left magnetic conduction disk, valve pocket and valve element constitutes the Ith section of axial direction
Flow-type damping clearance and the IIth section of radial flow dynamic formula damping clearance；Fluid course between right magnetic conduction disk and valve element constitutes the
III section of radial flow dynamic formula damping clearance and the IVth section of axial flow-type damping clearance；When being passed through electric current to magnet exciting coil, four sections
A certain size magnetic field will be produced in damping clearance, flow through the magnetic flow liquid viscosity increase of four sections of damping clearances, yield stress increases
By force, so as to form pressure differential between damper cavity volume I and cavity volume II.By controlling application size of current to realize damping force
Effectively control.This structure design is sufficiently used the trend of the magnetic line of force, on the premise of damping clearance width is not reduced, and increases
Big effective damping length and the section of shear, it is ensured that MR damper can export sufficiently large damping force, while will not
Resulted in blockage because damping clearance is too narrow.
(2) compared with the MR damper of traditional single fluid course, the MR damper uses mixed flow dynamic formula
Fluid course, it is just exportable larger using less exciting current on the premise of MR damper external dimensions is not increased
Controllable damping force, while damping force dynamic regulation scope is wider, be particularly suitable for use in the isostructural vibration damping of railway, automobile, bridge
Vibration prevention system.
(3) part used in MR damper of the present invention except left magnetic conduction disk, right magnetic conduction disk, valve pocket and valve element by
Outside mild steel permeability magnetic material is made, remaining parts are made by non-magnet_conductible material.This design can effectively ensure that the magnetic line of force to the greatest extent may be used
Energy integrated distribution gives full play to effect of the vertical magnetic field to magnetic flow liquid in four sections of damping clearances, improves MR damper
Efficiency, and effectively reduce MR damper energy consumption.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is mixed flow dynamic formula liquid flowing channel structure schematic diagram in built-up piston of the present invention.
Magnetic current and liquid flow blended flow-type fluid course schematic diagram when Fig. 3 is Tensile of the present invention.
Fig. 4 is built-up piston magnetic line of force distribution of the present invention and damping clearance distribution schematic diagram.
Fig. 5 is inventive piston left end cap left view.
Fig. 6 is inventive piston right end cap right view.
Fig. 7 is valve element right view of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
As shown in figure 1, the present invention includes：Piston rod 1, damper left end cap 2, sealing ring I 3, sleeve 4, piston left end cap
5th, screw I 6, sealing ring II 7, sealing ring III 8, valve pocket 9, sealing ring IV 10, valve element 11, screw II 12, piston right end cap 13, close
Seal V 14, right hanger 15, damper right end cap 16, screw III 17, floating piston 18, sealing ring VI 19, sealing ring VII 20, open
Groove sunk screw I 21, right magnetic conduction disk 22, pad I 23, magnet exciting coil 24, positioning disc 25, pad II 26, fluting countersunk head spiral shell
Follow closely II 27, left magnetic conduction disk 28, screw IV 29, sealing ring VIII 30, fairlead 31 and left hanger 32.
Fig. 2 is mixed flow dynamic formula liquid flowing channel structure schematic diagram in built-up piston of the present invention.Wherein, 33 be built-up piston；
4 are arranged circumferentially in the middle of piston left end cap 5 through hole A, B, C, D-shaped are into fluid course I 34；The right side of piston left end cap 5
Fluid course II 35 is formed between the left left side of magnetic conduction disk 28；Table in the left radial peripheral surface of magnetic conduction disk 28 and valve pocket 9
Fluid course III 36 is formed between face；Between the left right side of magnetic conduction disk 28 and the left side of valve element 11 and the left side of positioning disc 25
Form fluid course IV 37；The middle manhole E formation fluid course V 38 of valve element 11；The right side of valve element 11 and right magnetic conduction disk
Fluid course VI 39 is formed between 22 left sides；Shape between the right right side inner surface of the radial peripheral surface of magnetic conduction disk 22 and valve element 11
Into fluid course VII 40；Fluid course VIII 41 is formed between the right right side of magnetic conduction disk 22 and the left side of piston right end cap 13；It is living
Through hole F, G, H, I and intermediate throughholes J-shaped that 4 are arranged circumferentially in the middle of plug right end cap 13 are into fluid course Ⅸ 42；Mixed flow
Dynamic formula fluid course is by fluid course I 34, fluid course II 35, fluid course III 36, fluid course IV 37, fluid course V
38th, fluid course VI 39, fluid course VII 40, fluid course VIII 41 and fluid course Ⅸ 42 are constituted.Not changing, damper is whole
On the premise of body appearance and size, this mixed flow dynamic formula fluid course can be effectively increased magnetorheological effective damping length.
Magnetic current and liquid flow blended flow-type fluid course schematic diagram when Fig. 3 is Tensile of the present invention.When the tension of piston rod 1
When, the magnetic flow liquid in MR damper cavity volume I enters cavity volume by the mixed flow dynamic formula fluid course in built-up piston 33
Ⅱ。
Fig. 4 is built-up piston magnetic line of force distribution of the present invention and damping clearance distribution schematic diagram.Left magnetic conduction disk 28, valve pocket 9
And the fluid course between valve element 11 is constituted between the Ith section of axial flow-type damping clearance and the IIth section of radial flow dynamic formula damping
Gap；Fluid course between right magnetic conduction disk 22 and valve element 11 constitutes the IIIth section of radial flow dynamic formula damping clearance and the IVth section of axial direction
Flow-type damping clearance；The width of four sections of damping clearances is 1.0mm.
Fig. 5 is inventive piston left end cap left view, middle 4 be arranged circumferentially through hole A, B, C, D-shaped is into liquid stream
Passage I 34.
Fig. 6 is inventive piston right end cap right view, and through hole F, G, H, I and centre that centre 4 is arranged circumferentially are logical
Hole J-shaped is into fluid course Ⅸ 42.
Fig. 7 is valve element right view of the present invention, middle manhole E formation fluid course V 38.
Operation principle of the present invention is as follows：
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, when being passed through a certain size electric current to magnet exciting coil 24, because magnetic field is made
With the magnetic flow liquid of four sections of damping clearances its viscosity in mixed flow dynamic formula fluid course can increase, yield stress enhancing.Magnetic current
Become liquid and flow through this four sections of damping clearances, the intermolecular power of this catenation is just must pull against, so as to cause magnetic current and liquid flow
Resistance increase through valve, can slow down or prevent the flowing of liquid, and cause the two ends of built-up piston 33 to produce pressure differential.Pass through regulation
Size of current in magnet exciting coil 24, can change the yield stress of magnetic flow liquid, to reach required output damping force.
Claims (2)
1. a kind of MR damper with mixed flow dynamic formula fluid course, it is characterised in that including：Piston rod (1), damping
Device left end cap (2), sealing ring I (3), sleeve (4), piston left end cap (5), screw I (6), sealing ring II (7), sealing ring III
(8), valve pocket (9), sealing ring IV (10), valve element (11), screw II (12), piston right end cap (13), sealing ring V (14), the right side are hung
Ear (15), damper right end cap (16), screw III (17), floating piston (18), sealing ring VI (19), sealing ring VII (20), open
Groove sunk screw I (21), right magnetic conduction disk (22), pad I (23), magnet exciting coil (24), positioning disc (25), pad II
(26), slotted countersunk flat head screw II (27), left magnetic conduction disk (28), screw IV (29), sealing ring VIII (30), fairlead (31) and a left side
Hanger (32)；Piston rod (1) left end is connected with left hanger (32) by screw threads for fastening；Provided with circle in the middle of damper left end cap (2)
Shape through hole, piston rod (1) coordinates with damper left end cap (2) manhole internal surface gaps, piston rod (1) and damper left end
Lid (2) manhole inner surface is sealed by sealing ring VIII (30)；Piston rod (1) right-hand member is machined with external screw thread, and piston is left
Through hole is threaded in the middle of end cap (5), piston rod (1) right-hand member is connected with piston left end cap (5) by screw threads for fastening；Damper
Left end cap (2) is fixedly connected with sleeve (4) by screw IV (29)；Pass through sealing between damper left end cap (2) and sleeve (4)
I (3) of circle are sealed；Piston left end cap (5) right side and the contact of valve pocket (9) left side, piston left end cap (5) and valve pocket (9)
It is fixedly connected by screw I (6)；Sealed between piston left end cap (5) and valve pocket (9) by sealing ring II (7)；Valve pocket
(9) outer surface coordinates with sleeve (4) internal surface gaps, and valve pocket (9) is sealed with sleeve (4) by sealing ring IV (10)；It is left
It is furnished with pad II (26) between magnetic conduction disk (28) and positioning disc (25), the thickness of pad II (26) is 1.0mm；Left magnetic conduction circle
Disk (28), pad II (26) and positioning disc (25) are fixedly connected by slotted countersunk flat head screw II (27)；Left magnetic conduction disk
(28) radial clearance passed through for magnetic flow liquid, radial clearance thickness are left between radial peripheral surface and valve pocket (9) inner surface
For 1.0mm；Positioning disc (25) is machined with internal thread through hole, and valve element (11) left end is machined with external screw thread, positioning disc (25) and
Valve element (11) is threadably secured connection；The groove surrounded between positioning disc (25) and valve element (11) constitutes winding slot, excitation
Coil (24) is wrapped in winding slot；Two leads of magnet exciting coil (24) are by the fairlead and piston left end cap in valve pocket (9)
(5) draw, and drawn by the fairlead (31) in piston rod outside damper in corresponding fairlead；Positioning disc (25) with
Valve pocket (9) radial clearance fit, is sealed between positioning disc (25) and valve pocket (9) by sealing ring III (8)；Right magnetic conduction circle
It is furnished with pad I (23) between disk (22) and valve element (11) right side, pad I (23) thickness is 1.0mm；Right magnetic conduction disk (22),
Pad I (23) and valve element (11) right side are fixedly connected by slotted countersunk flat head screw I (21)；Right magnetic conduction disk (22) is radially round
The radial clearance passed through for magnetic flow liquid is left on the right side of perimeter surface and valve element (11) between inner surface, radial clearance thickness is
1.0mm；Piston right end cap (13) left side and the contact of valve element (11) its right end face, piston right end cap (13) radial end face and sleeve
(4) internal surface gaps coordinate；Sealed between piston right end cap (13) and valve element (11) by sealing ring VII (20)；Piston is right
End cap (13), valve element (11) are fixedly connected with valve pocket (9) by screw II (12)；Floating piston (18) outer surface and sleeve (4)
Internal surface gaps coordinate, and floating piston (18) is sealed with sleeve (4) by sealing ring VI (19)；Damper right end cap (16) and set
Cylinder (4) right side gap coordinates, and damper right end cap (16) is fixedly connected with sleeve (4) by screw III (17)；Damper is right
End cap (16) is sealed with sleeve (4) by sealing ring V (14)；Damper right end cap (16) right-hand member leads to right hanger (15)
Cross the connection that is screwed；Built-up piston (33) by piston left end cap (5), screw I (6), sealing ring II (7), sealing ring III (8),
Valve pocket (9), valve element (11), screw II (12), piston right end cap (13), sealing ring VII (20), slotted countersunk flat head screw I (21), the right side
Magnetic conduction disk (22), pad I (23), magnet exciting coil (24), positioning disc (25), pad II (26), slotted countersunk flat head screw II
(27) and left magnetic conduction disk (28) composition；4 are arranged circumferentially in the middle of piston left end cap (5) through hole A, B, C, D-shaped are into liquid
Circulation road I (34)；Fluid course II (35) is formed between piston left end cap (5) right side and left magnetic conduction disk (28) left side；
Fluid course III (36) is formed between left magnetic conduction disk (28) radial peripheral surface and valve pocket (9) inner surface；Left magnetic conduction disk
(28) fluid course IV (37) is formed between right side and valve element (11) left side and positioning disc (25) left side；Valve element (11)
Middle manhole E formation fluid courses V (38)；Formed between valve element (11) right side and right magnetic conduction disk (22) left side
Fluid course VI (39)；On the right side of right magnetic conduction disk (22) radial peripheral surface and valve element (11) fluid course is formed between inner surface
Ⅶ(40)；Fluid course VIII (41) is formed between the left side of right magnetic conduction disk (22) right side and piston right end cap (13)；Piston
Through hole F, G, H, I and intermediate throughholes J-shaped that 4 are arranged circumferentially in the middle of right end cap (13) are into fluid course Ⅸ (42)；Mixing
Flow-type fluid course is by fluid course I (34), fluid course II (35), fluid course III (36), fluid course IV (37), liquid
Circulation road V (38), fluid course VI (39), fluid course VII (40), fluid course VIII (41) and fluid course Ⅸ (42) group
Into；On the premise of damper monnolithic case size is not changed, this mixed flow dynamic formula fluid course can be effectively increased magnetorheological
Effective damping length；When piston rod (1) Tensile, the magnetic flow liquid in cavity volume I is by the mixed flow in built-up piston (33)
Dynamic formula fluid course enters cavity volume II；When piston rod (1) is compressed, the magnetic flow liquid in cavity volume II passes through built-up piston (33)
Interior mixed flow dynamic formula fluid course enters cavity volume I；Liquid stream between left magnetic conduction disk (28), valve pocket (9) and valve element (11)
Passage constitutes the Ith section of axial flow-type damping clearance and the IIth section of radial flow dynamic formula damping clearance；Right magnetic conduction disk (22) and valve
Fluid course between core (11) constitutes the IIIth section of radial flow dynamic formula damping clearance and the IVth section of axial flow-type damping clearance；Four
Section damping clearance thickness is 1.0mm；, will in four sections of damping clearances when being passed through a certain size electric current to magnet exciting coil (24)
A certain size magnetic field is produced, and the magnetic line of force passes perpendicularly through this four sections of damping clearances so that flow through the magnetic of four sections of damping clearances
Rheology fluid viscosity increases, yield stress enhancing, so that the cavity volume I and piston right end cap (13) in piston left end cap (5) left end are right
Pressure differential is formed between the cavity volume II at end, applies the size of electric current by changing, having for MR damper damping force can be achieved
Effect control.
2. a kind of MR damper with mixed flow dynamic formula fluid course according to claim 1, it is characterised in that：
Closing cavity volume I is surrounded between damper left end cap (2), sleeve (4) and piston left end cap (5)；Piston right end cap (13), sleeve
(4) closing cavity volume II and between floating piston (18) is surrounded；Floating piston (18), sleeve (4) and damper right end cap
(16) closing cavity volume III is surrounded between；Close filling magnetic flow liquid in cavity volume I and II；Close filling compressed gas in cavity volume III；
When piston rod (1) in axial direction move by under tension or compression, respective change can occur for the volume of closing cavity volume I and II, this
When floating piston (18) can float realize volume compensation by the left and right of axial direction；Left magnetic conduction disk (28), right magnetic conduction circle
Disk (22), valve pocket (9) and valve element (11) are made up of mild steel permeability magnetic material；Remaining parts are made by non-magnet_conductible material.
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| CN105626737A (en) * | 2016-03-02 | 2016-06-01 | 杨社喜 | Electric-control damping shock absorber |
| CN108869615A (en) * | 2018-09-20 | 2018-11-23 | 华东交通大学 | A kind of unicoil MR damper with snakelike fluid course |
| CN109236936B (en) * | 2018-11-11 | 2023-12-22 | 华东交通大学 | Magnetorheological damper sealed by elastic metal corrugated pipe |
| CN110017349B (en) * | 2019-03-15 | 2020-09-25 | 江苏大学 | Rigidity-controllable magneto-rheological damper for vehicle and rigidity control method |
| DE102019135760A1 (en) * | 2019-12-18 | 2021-06-24 | Inventus Engineering Gmbh | Magnetorheological braking device |
| CN111152616B (en) * | 2020-01-08 | 2022-09-27 | 合肥工业大学 | Magnetorheological damping suspension and measurement and control method thereof |
| CN112539240A (en) * | 2020-10-30 | 2021-03-23 | 中国直升机设计研究所 | Rotor magnetorheological damper piston structure |
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| US6390252B1 (en) * | 1999-09-13 | 2002-05-21 | Delphi Technologies, Inc. | Magnetorheological fluid damper with optimum damping |
| KR100865912B1 (en) * | 2007-09-17 | 2008-10-29 | 에스앤티대우(주) | Assembling apparatus of damper comprising magneto-rheological fluid and assembling method of damper using the same |
| CN102425636A (en) * | 2011-11-24 | 2012-04-25 | 宁波杉工结构监测与控制工程中心有限公司 | Novel magneto-rheological damper |
| CN102606670B (en) * | 2012-03-23 | 2014-04-02 | 华东交通大学 | Differential sensing type magnetorheological damper |
| CN203926577U (en) * | 2014-06-27 | 2014-11-05 | 四川工程职业技术学院 | Magnetorheological fluid shock absorber |
| CN104500787B (en) * | 2015-01-02 | 2016-10-26 | 华东交通大学 | A kind of mixed flow dynamic formula MR valve |
| CN204784405U (en) * | 2015-07-14 | 2015-11-18 | 华东交通大学 | Magneto rheological damper with mixed flow formula flow channel |
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