CN107701645A - A kind of combined type MR fluid shock absorber - Google Patents
A kind of combined type MR fluid shock absorber Download PDFInfo
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- CN107701645A CN107701645A CN201711033183.7A CN201711033183A CN107701645A CN 107701645 A CN107701645 A CN 107701645A CN 201711033183 A CN201711033183 A CN 201711033183A CN 107701645 A CN107701645 A CN 107701645A
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- cylinder barrel
- open hole
- circular passage
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 46
- 230000035939 shock Effects 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 230000001939 inductive effect Effects 0.000 claims abstract description 43
- 238000013016 damping Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims description 51
- 230000006835 compression Effects 0.000 claims description 50
- 239000006071 cream Substances 0.000 claims description 30
- 238000011084 recovery Methods 0.000 claims description 28
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 12
- 239000000696 magnetic material Substances 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F16F9/535—Magnetorheological [MR] fluid dampers
-
- 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
- F16F9/3207—Constructional features
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of combined type MR fluid shock absorber,Including shock absorber body and external valve,Shock absorber body is mainly by outer cylinder,Middle cylinder barrel,Work cylinder barrel,Director assembly,Piston assembly,Piston rod,Bottom valve assembly etc. forms,External valve is mainly by lower Supporting cover,Bonnet,Coil,Every magnetic cylinder,Magnetic conductive cylinder,Circular passage,Valve element,Adjusting nut,Upper Supporting cover,Annular magnetic inductive block,Valve seat,Sealing ring and outer mounting seat etc. are formed,Wherein triplex structure,Check valve,Topology layout based on external valve causes magnetic flow liquid through external valve one-way flow,Circular passage and radial passage in external valve are all controlled by magnetic field,Damping force regulation and control are mainly carried out in circular passage and radial passage,Effective damping passage dramatically increases,Magnetic field utilization rate is higher,Damping force adjustable range is larger,It can implement overload protection in the case of overload and external valve failure,Meeting can be in different field broad match under basic rigidity and strength condition,It is versatile.
Description
Technical field
The present invention relates to absorber technical field, especially suitable for all kinds of automobile suspension systems, it can also be used to big machinery,
Bullet train, bridge, building, armament systems etc., it is a kind of larger combined type magnetic current flowing deformation vibration-damping of damping force adjustable range
Device.
Background technology
Because having, simple in construction, response is rapid, energy consumption is small, controllability is strong, damping adjustable extent is big, continuous damping can be achieved
It is adjustable wait remarkable advantage, MR fluid shock absorber be widely used in automotive suspension, heavy duty machine tools, artillery system, bridge, house,
The fields such as leviathan, especially field of automobile suspension research with being more widely applied.Traditional MR fluid shock absorber
Essentially monotubular and double-barrel structure, portion of techniques scheme increase bypass valve arrangement, but relevant art feature still in piston or
The axial passage not with coil face is controlled in by-passing valve, adjustable damping passage is very limited, magnetic field utilization rate is low, can
Tune dampening range is greatly limited, shock absorber versatility is poor.It is such as more in order to overcome the limitation of conventional solution
The new solution of level Radial Flow and multistage circumferential flow has a certain effect in terms of extremely efficient damp channel, but both
So that the volume of shock absorber substantially increases, it is difficult to is arranged in automobile suspension system.
Worked hard in view of the above-mentioned problems, some researchers have carried out, it is intended to take into account effective damping passage, magnetic field utilizes
Four rate, versatility, volume critical aspects, such as the U of Chinese patent literature CN 203257967 describe a kind of screw valve cellular type
Magneto-rheological vibration damper, including oil sealing, oil seal seat, guider, end cap, working cylinder, inner cylinder tube, kuppe, piston rod, piston are total
The connector being connected into, the magnetic flow liquid inside bottom valve assembly, shock absorber and both ends with suspension system.The structure is in guider
Spiral valve opening is set, and coil is arranged in the position for the spiral valve opening for closing on guider, extends the sphere of action in magnetic field, add resistance
The adjustable range of Buddhist nun's power, it is easy to more number of turn coils and high current to arrange.But the effective damping passage of the structure is still limited,
Dampening range is improved by multiturn coil, larger exciting current, compared with high-intensity magnetic field, not yet breaks away from conventional art limitation, effectively resistance
The length of Buddhist nun's passage is restricted, it is impossible to and larger damp adjustable range can be produced by only relying on smaller exciting current and low-intensity magnetic field,
It can not realize and can be matched by the change of exciting current in different field.
Therefore, prior art not break through relevant art limitation and open defect, take into account effective damping passage,
Four magnetic field utilization rate, versatility, volume aspects need new technical scheme badly.
The content of the invention
The present invention provides a kind of combined type MR fluid shock absorber dependency structure and principle, can realize effective damping passage
Length and damp adjustable range substantially increases, low-intensity magnetic field can produce larger damping force, can be in difference by current regulation
Field broad match, shock absorber volume are without obvious increase.In preferable scheme, when event occurs in magnetic flow liquid viscosity control device
During barrier, shock absorber can work according to Passive Mode, it is ensured that security.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of combined type MR fluid shock absorber, including shock absorber body and the external valve on shock absorber body, vibration damping
Device body is mainly by outer cylinder, middle cylinder barrel, work cylinder barrel, director assembly, piston assembly, piston rod and bottom valve assembly group
Into the work cylinder barrel is interior to be provided with piston assembly, and piston-rod lower end is connected by screw thread with piston assembly, piston assembly and work
Sealing device is provided between cylinder barrel and is slidably matched, piston rod is slidably matched with the director assembly being located at the top of work cylinder barrel, work
Make to be installed with bottom valve assembly at the lower end port of cylinder barrel, the bottom of bottom valve assembly is connected with the bottom cavity in outer cylinder
It is logical, it is respectively equipped with check valve in piston assembly and bottom valve assembly；
The outer cylinder upper end is fitted with installation sleeve and is connected as a single entity, and middle cylinder barrel and work cylinder barrel are installed in outer cylinder,
The upper end of middle cylinder barrel and work cylinder barrel and the installation sleeve being located on outer cylinder and director assembly are real by shock absorber gland
Now coaxially positioned with outer cylinder, the downside of middle cylinder barrel is fixedly connected with the valve seat bottom of external valve, the both ends of middle cylinder barrel with
The connecting portion of work cylinder barrel is provided with sealing device；The space that the outer wall of the inwall of outer cylinder and middle cylinder barrel is formed is shoe cream room,
The space that the inwall of middle cylinder barrel and the outer wall of work cylinder barrel are formed is intermediate cavity, and work cylinder barrel inner space is working chamber, living
Working chamber is divided into recovery chamber and compression chamber by plug assembly, is provided with the first normal open hole between recovery chamber and intermediate cavity, shoe cream room, in
Between add magnetic flow liquid in recovery chamber in chamber, working chamber and compression chamber；
The external valve include lower Supporting cover, bonnet, coil, every magnetic cylinder, magnetic conductive cylinder, circular passage, valve element, adjusting nut, on
Supporting cover, annular magnetic inductive block, valve seat, sealing ring and outer mounting seat, the connection that the valve seat bottom of external valve is stretched on middle cylinder barrel
In interface, the inwall of valve seat bottom and middle cylinder barrel is concordant, passes through connecting interface and intermediate cavity with the coaxial mounted valve element of valve seat
Communicate, the magnetic flow liquid in intermediate cavity carries out one-way flow by external valve；
The lower end outer wall of valve seat forms the second cavity with outer mounting seat, and the second cavity communicates with shoe cream room, the magnetic current in external valve
Become liquid and enter the second cavity by the radial direction spill port on valve seat, be unidirectionally back to shoe cream room；
The center of valve element is machined with axial normal open hole, and the other end of valve element is provided with radial direction normal open hole, the wall coaxial suit of valve element
There are adjusting nut, upper Supporting cover, one-level annular magnetic inductive block, one-level circular passage, two level annular magnetic inductive block, two level circular passage；
The adjusting nut, upper Supporting cover, one-level annular magnetic inductive block, one-level circular passage, two level annular magnetic inductive block, two level annular
The wall coaxial of passage is provided with every magnetic cylinder and magnetic conductive cylinder, every magnetic cylinder and the outer wall suit coil of magnetic conductive cylinder, the outer wall of coil with
Bonnet, the inwall of valve seat are contacted and positioned；
The one-level annular magnetic inductive block and two level annular magnetic inductive block are respectively equipped with the first insertion normal open hole and the second insertion normal open hole,
The upper and lower end face of one-level circular passage is machined with first end face normal open hole and second end face normal open hole, two level circular passage respectively
Upper and lower end face be machined with the 3rd end face normal open hole and the 4th end face normal open hole respectively, one-level annular magnetic inductive block is upper with basin shape
The space that Supporting cover is formed be the first cavity, and the lower surface of two level circular passage and the space of valve seat composition are radial passage, footpath
Communicated to passage with the second cavity；
The first insertion normal open hole is alignd and communicated with first end face normal open hole, second end face normal open hole and the second insertion normal open
Hole is alignd and communicated, and the second insertion normal open hole is alignd and communicated with the 3rd end face normal open hole, and the 4th end face normal open hole is with radially leading to
Road communicates；So as to form the whole girth of one-level circular passage and two level circular passage, the radical length of radial passage be to have
Imitate relaxation length.
Preferably, in external valve, the upper and lower wall of one-level circular passage and two level circular passage uses permeability magnetic material,
The inside and outside wall of one-level circular passage and two level circular passage uses NULL；One-level annular magnetic inductive block, two level annular magnetic conduction
Block, magnetic conductive cylinder, bonnet, valve seat use permeability magnetic material, valve element, upper Supporting cover, every magnetic cylinder use NULL.
Preferably, the both ends of the middle cylinder barrel use undergauge structure, the first sealing ring and the second sealing is respectively adopted
Circle realizes the sealing with work cylinder barrel relevant position.
Preferably, the check valve arranged in the piston assembly is flowing valve and stretching valve, installed on bottom valve assembly
Check valve is recuperation valve and compression valve, and flowing valve and recuperation valve are formed by stacking by relatively thin few piece annular valve block, stretching valve and
Compression valve is formed by stacking by thicker multi-disc annular valve block.
The operation principle of preferred one-way valve：
In the normal restoration stage, piston assembly is up, and flowing valve, stretching valve, compression valve are in normal closed mode, and recuperation valve is easily opened
Open, the magnetic flow liquid in recovery chamber enters intermediate cavity by the first normal open hole of work cylinder barrel upper end, and storage is converged into via external valve
Oil pocket, the magnetic flow liquid in shoe cream room is by compensation valve compensation to compression chamber；
Normal compression stage, piston assembly is descending, and stretching valve, recuperation valve, compression valve are in normal closed mode, and flowing valve is opened,
Magnetic flow liquid in compression chamber enters recovery chamber by flowing valve, and the magnetic flow liquid in recovery chamber is by the of work cylinder barrel upper end
One normal open hole enters intermediate cavity, and shoe cream room is converged into via external valve；
Normal compression and recovery phase, magnetic flow liquid flow by external valve one-way circulation and implement viscosity control, realize resistance
The regulation and control of Buddhist nun's power；Under extreme working position, stretch valve and compression valve implements overload protection, appropriate to open, shock absorber is according to passive
Pattern works, it is ensured that security.
Operation principle of the magnetic flow liquid in external valve：
In external valve, the flow path for coming from the magnetic flow liquid of intermediate cavity is followed successively by axial normal open hole, radial direction normal open hole,
One cavity, the first insertion normal open hole, first end face normal open hole, one-level circular passage, second end face normal open hole, the second insertion normal open
Hole, the 3rd end face normal open hole, two level circular passage, the 4th end face normal open hole, radial passage, the second cavity, are back to shoe cream room；
In external valve, come from first end face normal open hole magnetic flow liquid enter one-level circular passage after, split into two parts,
After each several part makees circumferential flow, second end face normal open hole is converged into, the second insertion normal open hole, the 3rd end face normal open hole enter two level
Circular passage, two parts are split into again, after each several part makees circumferential flow, converge into the 4th end face normal open hole, it is logical by radial direction
The Radial Flow in road enters the second cavity, is back to shoe cream room；
In external valve, the whole girth of one-level circular passage and two level circular passage is effective damping length, controllable damping
Passage greatly increases；The radical length of radial passage is effective controllable damping length, further increases damping effect；
One-level circular passage, two level circular passage, radial passage are effective controllable damping passage in the external valve, must be realized
The magnetic line of force passes perpendicularly through the magnetic flow liquid in one-level circular passage, two level circular passage, radial passage along whole circumferential direction,
One-level circular passage and the circumferential flow direction of the magnetic flow liquid in two level circular passage are vertical with the magnetic line of force, in radial passage
The radial flow direction of magnetic flow liquid is vertical with the magnetic line of force；
In external valve, magnetic field path is logical by radial passage, two level circular passage, two level annular magnetic inductive block, one-level annular successively
Road, one-level annular magnetic inductive block, magnetic conductive cylinder, bonnet, valve seat form closed-loop path, and most magnetic lines of force are logical through one-level annular
Magnetic flow liquid in road, two level circular passage, radial passage.
Structure and principle more than, a kind of combined type MR fluid shock absorber provided by the invention have as follows
Beneficial effect：
1st, the present invention proposes a kind of MR fluid shock absorber technical scheme for being totally different from existing structure, using triplex structure
With the topology layout based on external valve, magnetic flow liquid one-way flow is formed, damping force is mainly controlled in external valve；Effectively
Damp channel is all controlled by magnetic field, magnetic field utilization rate is higher, damping force adjustable range is larger, energy consumption is relatively low；External valve arrangement
Simply, small volume, cost are relatively low, extension is easy, the security after failure can obtain abundant guarantee.
2nd, shock absorber body corresponding construction, material and common oil damper are basically identical, only adds additional in one
Between cylinder barrel, extra diameter will not be significantly increased, be easily installed in narrow locus, also reduce production magnetic flow liquid subtract
Shake the cost of device, simplify the technological process of exploitation new type vibration isolator.
3rd, external valve arrangement is compact, component number is few and is conventional machining parts, small volume, easy to maintenance, raw
Production is low with use cost, and extension and adjustment damping are easy, only turns on adjusting nut, increase or reduction circular passage number, again
New fastening, differentiation configuration and different field broad match can be realized in same field.
4th, magnetic field utilization rate is higher, and low-intensity magnetic field can produce larger damping force, and adjustable extent is larger, using coil turn
Less, exciting current is smaller, energy consumption is low, caloric value is smaller.
5th, external valve flexible arrangement, it is easily installed in the relatively low position of shock absorber body, increased micro volume will not be by
Arrangement to automobile chassis limits.
6th, by the way of the control damping of external valve, avoid and arrange magnetic field in piston assembly small space, be easy to line
The arrangement of circle and wire, beneficial to radiating.
7th, due to longer controllable damping passage, adjustable extent is larger, can be achieved by different exciting current regulations
Different damping force ranges, the combined type MR fluid shock absorber can be in different field in the case where meeting fundamental strength and rigidity condition
Using versatility is stronger.
8th, when failures such as external valve is entirely ineffective, blockings, the MR fluid shock absorber can be according to the passive vibration damping of tradition
The mode of device works, and shows hard damping characteristic, ensures vehicle safety.
Brief description of the drawings
Fig. 1 is overall structure diagram.
Fig. 2 is that overall structure master cuts open schematic diagram.
Fig. 3 is that the master of external valve 12 cuts open structure enlargement diagram.
Fig. 4 is the close-up schematic view of guiding assemblage 6 in Fig. 2.
Fig. 5 is the close-up schematic view of piston assembly 7 in Fig. 2.
Fig. 6 is the close-up schematic view of bottom valve assembly 9 in Fig. 2.
Fig. 7 is magnetic line of force path schematic diagram in external valve 12.
Fig. 8 is that magnetic flow liquid flows path schematic diagram when shock absorber is in compression travel.
Fig. 9 is the M partial enlarged drawings in Fig. 8.
Figure 10 is that shock absorber is in magnetic flow liquid flowing path schematic diagram when restoring stroke.
Figure 11 is the N partial enlarged drawings in Figure 10.
Shown in figure：Shock absorber body (A), outer cylinder (1), middle cylinder barrel (2), connecting interface (2a), work cylinder barrel
(3), the first normal open hole (3a), the first sealing ring (4-1), the second sealing ring (4-2), installation sleeve (5), director assembly (6),
Shock absorber gland (6-1), dust cover (6-2), oil sealing (6-3), the 3rd sealing ring (6-4), this spy's envelope (6-5), guider (6-
6), pilot bushing (6-7), piston assembly (7), limit base (7-1), circulation valve leaf (7-2), flowing valve (7-3), piston valve base
(7-4), stretching valve (7-5), spring base (7-6), sealing guide ring (7-7), the 4th sealing ring (7-8), guide pin bushing (7-9), first
Spring (7-10), nut (7-11), piston rod (8), bottom valve assembly (9), rivet (9-1), second spring (9-2), recuperation valve (9-
3), compression valve seat (9-4), compression valve (9-5), hanger (10), bracket bush (11), external valve (12), lower Supporting cover (12-1),
Bonnet (12-2), coil (12-3), every magnetic cylinder (12-4), magnetic conductive cylinder (12-5), circular passage (12-6), one-level circular passage
(12-61), first end face normal open hole (12-61a), second end face normal open hole (12-61b), two level circular passage (12-62), the
Three end faces normal open hole (12-62a), the 4th end face normal open hole (12-62b), valve element (12-7), axial normal open hole (12-7a), radially
Normal open hole (12-7b), first boss (12-7c), adjusting nut (12-8), upper Supporting cover (12-9), annular magnetic inductive block (12-
10), one-level annular magnetic inductive block (12-101), the first insertion normal open hole (12-101a), two level annular magnetic inductive block (12-102), the
Two insertions normal open hole (12-102a), valve seat (12-11), radial direction spill port (12-11a), boss annular groove (12-11b), second is convex
Platform (12-11c), the 5th sealing ring (12-12), outer mounting seat (12-13), the second cavity (12-13a), radial passage (12-
14), the first cavity (12-15), the 6th sealing ring (12-16), shoe cream room (X), intermediate cavity (Y), working chamber (Z), recovery chamber (Z-
1), compression chamber (Z-2).
Embodiment
As shown in Figure 1, 2, 3, a kind of combined type MR fluid shock absorber, including shock absorber body A and external valve 12, vibration damping
Device body A is mainly by outer cylinder 1, middle cylinder barrel 2, work cylinder barrel 3, the first sealing ring 4-1, the second sealing ring 4-2, installation sleeve
5th, director assembly 6, piston assembly 7, piston rod 8, bottom valve assembly 9, hanger 10, bracket bush 11 form, and external valve 12 includes
Lower Supporting cover 12-1, bonnet 12-2, coil 12-3, every magnetic cylinder 12-4, magnetic conductive cylinder 12-5, circular passage 12-6, valve element 12-7, adjust
Save nut 12-8, upper Supporting cover 12-9, annular magnetic inductive block 12-10, valve seat 12-11, the 5th sealing ring 12-12, outer mounting seat 12-
13。
Middle cylinder barrel 2 and work cylinder barrel 3 are coaxially installed in outer cylinder 1, the inwall of outer cylinder 1 and middle cylinder barrel 2 it is outer
The space that wall is formed be shoe cream room X, and the space of the inwall of middle cylinder barrel 2 and the outer wall formation of work cylinder barrel 3 is intermediate cavity Y, work
It is working chamber Z to make the inner space of cylinder barrel 3, and working chamber Z is divided into recovery chamber Z-1 and compression chamber Z-2, shoe cream room by piston assembly 7
X, magnetic flow liquid is added in the recovery chamber Z-1 and compression chamber Z-2 in intermediate cavity Y, working chamber Z.
The middle both ends of cylinder barrel 2 use undergauge structure, be respectively adopted the first sealing ring 4-1 and the second sealing ring 4-2 realize with
The sealing function of the relevant position of work cylinder barrel 3, avoids magnetic flow liquid from leaking to shoe cream room X by intermediate cavity Y.
Work cylinder barrel 3 realizes coaxial positioning, shock absorber gland by installation sleeve 5 and director assembly 6 with outer cylinder 1
6-1 and installation sleeve 5 carry out screw thread socket, the shock absorber gland 6-1 installation sleeve 5, director assembly 6 are carried out positioning with
Fastening.
The lower end of piston rod 8 is fixedly connected by screw thread with piston assembly 7, and upper end and the director assembly 6 of piston rod 8 are slided
Move and coordinate and ensure the axial movement of piston rod 8, flowing valve 7-3 and stretching valve 7-5 are integrated in piston assembly 7, bottom valve assembly 9
The bottom of outer cylinder 1 and the bottom space of work cylinder barrel 3 are installed on, the bottom outer surface of outer cylinder 1 is provided with and suspension system
Connector hanger 10 and bracket bush 11.
External valve 12 is overall to be coaxially installed in outer mounting seat 12-13, and outer mounting seat 12-13 is welded in the lower end of outer cylinder 1
The outer surface of position, outer mounting seat 12-13 and bonnet 12-2, valve seat 12-11 in external valve 12 binding site interference fit are real
The radial positioning of existing external valve 12 and fastening, install the 5th sealing ring 12-12 additional between outer mounting seat 12-13 and valve seat 12-11.
The bottom of valve seat 12-11 in external valve 12 passes through outer cylinder 1, is stretched by the connecting interface 2a on middle cylinder barrel 2
Enter to intermediate cavity Y, realize that external valve 12 connects with intermediate cavity Y, the magnetic flow liquid being easy in intermediate cavity Y is carried out by external valve 12
One-way flow；Connecting interface 2a apical position is spacing to valve seat 12-11 progress, ensures that valve seat 12-11 bottom entrance stretches into
To the position concordant with intermediate cavity Y inner surfaces.
Install the 6th sealing ring 12-16, valve seat between valve seat 12-11 bottom outer surface and connecting interface 2a inwall additional
The second cavity 12-13a, the second cavity are formed between 12-11 lower end outer surface and outer mounting seat 12-13 lower end inner surface
12-13a connects with shoe cream room X, is easy to the magnetic flow liquid in external valve 12 by the radial direction spill port 12-11a on valve seat 12-11
The second cavity 12-13a is entered, is unidirectionally back to shoe cream room X.
As shown in Fig. 2,3,6, valve seat 12-11 is the matrix of external valve 12, and valve element 12-7 is coaxially installed on valve seat 12-11
It is interior, lower Supporting cover 12-1, upper Supporting cover 12-9, valve seat 12-11 to valve element 12-7 carry out axially position, valve element 12-7 lower end with
The interference fit of valve seat 12-11 inwalls avoids magnetic flow liquid from directly leaking to shoe cream room X.
Valve element 12-7 center is machined with axial normal open hole 12-7a, and the other end of valve element is provided with radial direction normal open hole 12-7b,
Adjusting nut 12-8, upper Supporting cover 12-9, one-level annular magnetic inductive block 12-101, one-level circular passage 12-61, two level annular magnetic conduction
In valve element 12-7 outer wall, it is radially fixed to be carried out by valve element 12-7 for block 12-102, the equal coaxial packages of two level circular passage 12-62
Position.
The second boss 12-11c in first boss 12-7c and valve seat 12-11 on valve element 12-7 is two level circular passage
12-62 axial support zone, install two level annular magnetic inductive block 12-102, one-level annular on the 12-62 of two level circular passage additional successively
Passage 12-61, one-level annular magnetic inductive block 12-101, upper Supporting cover 12-9 bottom plane are with one-level annular magnetic inductive block 12-101's
Upper surface contacts, and upper Supporting cover 12-9, first boss 12-7c, second boss 12-11c are jointly to one-level annular magnetic inductive block 12-
101st, one-level circular passage 12-61, two level annular magnetic inductive block 12-102, two level circular passage 12-62 carry out axially position and tight
Gu.
One-level annular magnetic inductive block 12-101, one-level circular passage 12-61, two level annular magnetic inductive block 12-102, two level annular
Passage 12-62 wall coaxial is provided with every magnetic cylinder 12-4 and magnetic conductive cylinder 12-5, every magnetic cylinder 12-4 and magnetic conductive cylinder 12-5 outer wall
Coaxial package coil 12-3, coil 12-3 are contacted and positioned with bonnet 12-2, valve seat 12-11 inwall.
One-level annular magnetic inductive block 12-101 and two level annular magnetic inductive block 12-102 are respectively equipped with the first insertion normal open hole 12-
It is normal that the insertions of 101a and second normal open hole 12-102a, one-level circular passage 12-61 upper and lower end face are machined with first end face respectively
Through hole 12-61a and second end face normal open hole 12-61b, two level circular passage 12-62 upper and lower end face are machined with the 3rd end respectively
Face normal open hole 12-62a and the 4th end face normal open hole 12-62b, one-level annular magnetic inductive block 12-101 and the upper Supporting cover 12-9 of basin shape
The space of composition is the first cavity 12-15, and two level circular passage 12-62 lower surface and the valve seat 12-11 spaces formed are footpath
To passage 12-14, radial passage 12-14 communicates with the second cavity 12-13a.
First insertion normal open hole 12-101a aligns and communicated with first end face normal open hole 12-61a, second end face normal open hole
12-61b aligns and communicated with the second insertion normal open hole 12-102a, the second insertion normal open hole 12-102a and the 3rd end face normal open
Hole 12-62a aligns and communicated, and the 4th end face normal open hole 12-62b communicates with radial passage 12-14.
Every the upper and lower surfaces of magnetic cylinder 12-4 by the way of low-temperature welding respectively with boss annular groove 12-11b and magnetic conductive cylinder 12-5
Connection is realized, magnetic conductive cylinder 12-5 upper end outer surface contacts with bonnet 12-11 inwall, and magnetic conductive cylinder 12-5 upper end inner surface leads to
Cross screw thread to be connected with adjusting nut 12-8, adjusting nut 12-8 inner chamber contacts simultaneously with valve element 12-7 tops and upper Supporting cover 12-9
Implement axially position and fastening, bonnet 12-2 and valve seat 12-11 is realized in contact position and is interference fitted.
Bonnet 12-2 and adjusting nut 12-8 is used for axially position and the fastening of whole external valve 12, and adjusting nut 12-8 can
Manufacture and the rigging error of external valve 12 are made up, also allows for adjusting component number, realizes that differentiation configuration and different field should
With.
As shown in Figure 2,4, dust cover 6-2, oil sealing 6-3, the 3rd sealing ring 6-4, this spy's envelope 6- are provided with director assembly 6
5th, guider 6-6, pilot bushing 6-7, guider 6-6 are stretched into work cylinder barrel 3 from the tip portion of work cylinder barrel 3, working cylinder
3 highest planes of cylinder are spacing to guider 6-6 progress, and guider 6-6 lower end inner wall is coaxially installed with pilot bushing 6-7, is oriented to
The 3rd sealing ring 6-4 of installation between device 6-6 outer wall and installation sleeve 5, the piston rod 8 and oil sealing 6-3 in director assembly 6,
Si Te envelopes 6-5, guider 6-6, pilot bushing 6-7 etc. are more to be partly slidably matched and ensures the axial movement of piston rod 8, as far as possible
Prevent magnetic flow liquid from revealing.
As shown in Fig. 2,5,6, piston assembly 7 is provided with flowing valve 7-3 and stretching valve 7-5, and bottom valve assembly 9 is provided with compensation
Valve 9-3 and compression valve 9-5, flowing valve 7-3, stretching valve 7-5, recuperation valve 9-3, compression valve 9-5 are check valve, flowing valve 7-3
It is formed by stacking with recuperation valve 9-3 by relatively thin few piece annular valve block, stretching valve 7-5 and compression valve 9-5 is justified by thicker multi-disc
Annular valve block is formed by stacking.
In the normal restoration stage, piston assembly 7 is up, and flowing valve 7-3, stretching valve 7-5, compression valve 9-5 are in and often close shape
State, the magnetic flow liquid in recovery chamber Z-1 enters intermediate cavity Y by the first normal open hole 3a of the upper end of work cylinder barrel 3, via external valve 12
Converge into shoe cream room X；
Magnetic flow liquid in recovery chamber Z-1 and compression chamber Z-2 does not circulate directly, the magnetic flow liquid pressure in shoe cream room X and compression
After the difference of magnetic flow liquid pressure in chamber Z-2 reaches recuperation valve 9-3 unlatching critical pressure differentials, recuperation valve 9-3 is suitably opened, oil storage
Magnetic flow liquid in chamber X arrives compression chamber Z-2 by recuperation valve 9-3 compensation, makes up magnetic flow liquid volume deficiency in compression chamber Z-2；
Normal compression stage, piston assembly 7 is descending, and stretching valve 7-5, recuperation valve 9-3, compression valve 9-5 are in normal closed mode, flow
Port valve 7-3 is opened, and the magnetic flow liquid in compression chamber Z-2 enters directly into recovery chamber Z-1 by flowing valve 7-3, in recovery chamber Z-1
Magnetic flow liquid intermediate cavity Y is entered by the first normal open hole 3a of the upper end of work cylinder barrel 3, converge into shoe cream room X via external valve 12；
Normal compression and recovery phase, magnetic flow liquid flow by the external one-way circulation of valve 12 and implement viscosity control, realize
The regulation and control of damping force；
When magnetic flow liquid flowing in external valve 12 is more difficult, the external valve 12 of recuperation, intermediate cavity Y, in recovery chamber Z-1
Magnetic flow liquid pressure it is very high, the magnetic flow liquid pressure difference in recovery chamber Z-1 and compression chamber Z-2 forces recuperation valve 9-3 to open
Micro aperture, hard damping characteristic is presented, avoids external valve 12 from blocking, damage, exciting current is excessively high causes system destruction, ensure
Traffic safety；When magnetic flow liquid flowing in external valve 12 is more difficult, the external valve 12 of compression process, intermediate cavity Y, recovery chamber
Magnetic flow liquid pressure in Z-1 is very high, and flowing valve 7-3 apertures are greatly suppressed, and compression valve 9-5 opens micro aperture, compression
Magnetic flow liquid aerial drainage in chamber Z-2 ensures that piston assembly has certain locomitivity, avoids system destruction to shoe cream room X；
Under limiting condition, stretching valve 7-5 and recuperation valve 9-3 is forced to open, and shock absorber body A returns to passive damper Working mould
Formula, combined type MR fluid shock absorber be in external valve 12 active control pattern and shock absorber body A Passive Mode simultaneously
The state of work, excessive damping force, too small piston assembly stroke are avoided, implement overload protection.
As shown in Fig. 2,3,7, the path in magnetic field is as shown by arrows successively by radial passage 12-14, two level circular passage 12-
62nd, two level annular magnetic inductive block 12-102, one-level circular passage 12-61, one-level annular magnetic inductive block 12-101, magnetic conductive cylinder 12-5, valve
Cover 12-2, valve seat 12-11 and form closed-loop path, most magnetic lines of force all pass perpendicularly through one-level circular passage 12-61, two level
Magnetic flow liquid in circular passage 12-62, radial passage 12-14, one-level circular passage 12-61 and two level circular passage 12-62
The circumferential flow direction of interior magnetic flow liquid is vertical with the magnetic line of force, the magnetic flow liquid radial flow direction in the 12-14 of radial passage
It is vertical with the magnetic line of force.
One-level circular passage 12-61 and two level circular passage 12-62 upper and lower wall use permeability magnetic material, and one-level annular is led to
Road 12-61 and two level circular passage 12-62 inside and outside wall use NULL, one-level annular magnetic inductive block 12-101, two level annular
Magnetic inductive block 12-102, magnetic conductive cylinder 12-5, bonnet 12-2, valve seat 12-11 use permeability magnetic material, valve element 12-7, upper Supporting cover 12-9,
NULL is used every magnetic cylinder 12-4.
As shown in arrow in Fig. 2,3,8,9, normal compression stage, piston assembly 7 is descending, stretching valve 7-5, recuperation valve 9-3,
Compression valve 9-5 is in normal closed mode, and flowing valve 7-3 is opened, and the magnetic flow liquid in compression chamber Z-2 enters multiple through flowing valve 7-3
Magnetic flow liquid in former chamber Z-1, in recovery chamber Z-1 is normal via the first normal open hole 3a, intermediate cavity Y, connecting interface 2a, axial direction successively
Through hole 12-7a, radial direction normal open hole 12-7b, the first cavity 12-15, the first insertion normal open hole 12-101a, first end face normal open hole
12-61a, one-level circular passage 12-61, second end face normal open hole 12-61b, the second insertion normal open hole 12-102a, the 3rd end face
Normal open hole 12-62a, two level circular passage 12-62, the 4th end face normal open hole 12-62b, radial passage 12-14, the second cavity 12-
13a, it is back to shoe cream room X.
As shown in arrow in Fig. 2,3,10,11, in the normal restoration stage, piston assembly 7 is up, flowing valve 7-3, stretching valve 7-
5th, compression valve 9-5 is in normal closed mode, and recuperation valve 9-3 is easily opened, and the magnetic flow liquid in recovery chamber Z-1 passes through first successively
Normal open hole 3a, intermediate cavity Y, connecting interface 2a, axial normal open hole 12-7a, radial direction normal open hole 12-7b, the first cavity 12-15,
Consistent generally through hole 12-101a, first end face normal open hole 12-61a, one-level circular passage 12-61, second end face normal open hole 12-
61b, the second insertion normal open hole 12-102a, the 3rd end face normal open hole 12-62a, two level circular passage 12-62, the 4th end face normal open
Hole 12-62b, radial passage 12-14, the second cavity 12-13a, are back to shoe cream room X.
When magnetic flow liquid pressure in shoe cream room X is more than the magnetic flow liquid pressure in compression chamber Z-2, recuperation valve 9-3 is opened,
Magnetic flow liquid in shoe cream room X is compensated into compression chamber Z-2 by recuperation valve 9-3, is made up compression chamber Z-2 inner volumes deficiency, is kept away
Exempt from idle running phenomenon.
As shown in Fig. 3,8,9,10,11, no matter compress or recovery phase, magnetic flow liquid unidirectionally flow by external valve 12
It is dynamic, come from first end face normal open hole 12-61a magnetic flow liquid enter one-level circular passage 12-61 after, split into two parts,
After each several part makees circumferential flow, second end face normal open hole 12-61b, the second insertion normal open hole 12-102a, the 3rd end face are converged into
Normal open hole 12-62a enters two level circular passage 12-62, splits into two parts again, after each several part makees circumferential flow, converges into
4th end face normal open hole 12-62b, enter the second cavity 12-13a by radial passage 12-14 Radial Flow, be back to oil storage
Chamber X.
One-level circular passage 12-61 and two level circular passage 12-62 whole girth are effective damping length, controllable resistance
Buddhist nun's passage greatly increases；Radial passage 12-14 radical length is effective controllable damping length, further increase damping effect
Should.
Claims (5)
- A kind of 1. combined type MR fluid shock absorber, it is characterised in that：Including shock absorber body (A) and installed in shock absorber body (A) the external valve (12) on,Shock absorber body (A) is mainly total by outer cylinder (1), middle cylinder barrel (2), work cylinder barrel (3), director assembly (6), piston Formed into (7), piston rod (8) and bottom valve assembly (9), be provided with piston assembly (7) in the work cylinder barrel (3), under piston rod (8) End is connected by screw thread with piston assembly (7), and sealing device is provided between piston assembly (7) and work cylinder barrel (3) and is slidably matched, Piston rod (8) is slidably matched with the director assembly (6) being located at the top of work cylinder barrel (3), at the lower end port of work cylinder barrel (3) Bottom valve assembly (9) is installed with, the bottom of bottom valve assembly (9) is connected with the bottom cavity in outer cylinder (1), piston assembly (7) and in bottom valve assembly (9) it is respectively equipped with check valve；Outer cylinder (1) upper end is fitted with installation sleeve (5) and is connected as a single entity, middle cylinder barrel (2) and work cylinder barrel (3) installation In the outer cylinder (1), the upper end of middle cylinder barrel (2) and work cylinder barrel (3) and the installation sleeve (5) that is located on outer cylinder (1) and Director assembly (6) by shock absorber gland (6-1) realize with the coaxial positioning of outer cylinder (1), the downside of middle cylinder barrel (2) and outside Valve seat (12-11) bottom for putting valve (12) is fixedly connected, and the both ends of middle cylinder barrel (2) and the connecting portion of work cylinder barrel (3) are provided with Sealing device；The space that the outer wall of the inwall of outer cylinder (1) and middle cylinder barrel (2) is formed is shoe cream room (X), middle cylinder barrel (2) The space that is formed of outer wall of inwall and work cylinder barrel (3) be intermediate cavity (Y), work cylinder barrel (3) inner space is working chamber (Z), working chamber (Z) is divided into recovery chamber (Z-1) and compression chamber (Z-2), recovery chamber (Z-1) and intermediate cavity by piston assembly (7) (Y) it is provided with the first normal open hole (3a) between, recovery chamber (Z-1) and compression in shoe cream room (X), intermediate cavity (Y), working chamber (Z) Magnetic flow liquid is added in chamber (Z-2)；The external valve (12) include lower Supporting cover (12-1), bonnet (12-2), coil (12-3), every magnetic cylinder (12-4), magnetic conduction Cylinder (12-5), circular passage (12-6), valve element (12-7), adjusting nut (12-8), upper Supporting cover (12-9), annular magnetic inductive block (12-10), valve seat (12-11), the 5th sealing ring (12-12) and outer mounting seat (12-13), the valve seat (12- of external valve (12) 11) bottom is stretched into the connecting interface (2a) on middle cylinder barrel (2), and the inwall of valve seat (12-11) bottom and middle cylinder barrel (2) is put down Together, communicated with valve seat (12-11) coaxial mounted valve element (12-7) by connecting interface (2a) with intermediate cavity (Y), intermediate cavity (Y) In magnetic flow liquid by external valve (12) carry out one-way flow；The lower end outer wall of valve seat (12-11) forms the second cavity (12-13a), the second cavity (12- with outer mounting seat (12-13) 13a) communicated with shoe cream room (X), the magnetic flow liquid in external valve (12) is by the radial direction spill port (12- on valve seat (12-11) The second cavity (12-13a) 11a) is entered, is unidirectionally back to shoe cream room (X)；The center of valve element (12-7) is machined with axial normal open hole (12-7a), and the other end of valve element is provided with radial direction normal open hole (12- 7b), the wall coaxial of valve element (12-7) is set with adjusting nut (12-8), upper Supporting cover (12-9), one-level annular magnetic inductive block (12-101), one-level circular passage (12-61), two level annular magnetic inductive block (12-102), two level circular passage (12-62)；The adjusting nut (12-8), upper Supporting cover (12-9), one-level annular magnetic inductive block (12-101), one-level circular passage (12- 61), two level annular magnetic inductive block (12-102), the wall coaxial of two level circular passage (12-62) be provided with every magnetic cylinder (12-4) and Magnetic conductive cylinder (12-5), every magnetic cylinder (12-4) and the outer wall suit coil (12-3) of magnetic conductive cylinder (12-5), the outer wall of coil (12-3) Contact and position with the inwall of bonnet (12-2), valve seat (12-11)；The one-level annular magnetic inductive block (12-101) and two level annular magnetic inductive block (12-102) are respectively equipped with the first insertion normal open hole (12-101a) and the second insertion normal open hole (12-102a), the upper and lower end face of one-level circular passage (12-61) are machined with the respectively End face normal open hole (12-61a) and second end face normal open hole (12-61b), the upper and lower end face point of two level circular passage (12-62) The 3rd end face normal open hole (12-62a) and the 4th end face normal open hole (12-62b), one-level annular magnetic inductive block (12-101) are not machined with The space formed with the upper Supporting cover (12-9) of basin shape is the first cavity (12-15), the lower surface of two level circular passage (12-62) The space formed with valve seat (12-11) is radial passage (12-14), radial passage (12-14) and the second cavity (12-13a) phase It is logical；First insertion normal open hole (12-101a) is alignd and communicated with first end face normal open hole (12-61a), and second end face is normal Through hole (12-61b) align and communicated with the second insertion normal open hole (12-102a), the second insertion normal open hole (12-102a) and the Three end faces normal open hole (12-62a) are alignd and communicated, and the 4th end face normal open hole (12-62b) communicates with radial passage (12-14)；So as to form one-level circular passage（12-61）With two level circular passage（12-62）Whole girth, radial passage（12- 14）Radical length be effective damping length.
- A kind of 2. combined type MR fluid shock absorber according to claim 1, it is characterised in that：In external valve (12), One-level circular passage (12-61) and two level circular passage (12-62) upper and lower wall use permeability magnetic material, one-level circular passage (12-61) and two level circular passage (12-62) inside and outside wall use NULL；One-level annular magnetic inductive block (12-101), two level Annular magnetic inductive block (12-102), magnetic conductive cylinder (12-5), bonnet (12-2), valve seat (12-11) use permeability magnetic material, valve element (12- 7), upper Supporting cover (12-9), every magnetic cylinder (12-4) use NULL；So that magnetic field path is successively by radial passage (12-14), two level circular passage (12-62), two level annular magnetic inductive block (12-102), one-level circular passage (12-61), one-level annular magnetic inductive block (12-101), magnetic conductive cylinder (12-5), bonnet (12-2), Valve seat (12-11) forms closed-loop path, and most magnetic lines of force all pass perpendicularly through one-level circular passage (12-61), two-stage ring Magnetic flow liquid in shape passage (12-62), radial passage (12-14), one-level circular passage (12-61) and two level circular passage The circumferential flow direction of magnetic flow liquid in (12-62) is vertical with the magnetic line of force, and the magnetic flow liquid in radial passage (12-14) is radially Flow direction is vertical with the magnetic line of force.
- A kind of 3. combined type MR fluid shock absorber according to claim 1, it is characterised in that：The middle cylinder barrel (2) Both ends use undergauge structure, the first sealing ring (4-1) and the second sealing ring (4-2) is respectively adopted and realizes and work cylinder barrel (3) The sealing of relevant position.
- A kind of 4. combined type MR fluid shock absorber according to claim 1, it is characterised in that：The piston assembly (7) The check valve of upper arrangement is flowing valve (7-3) and stretching valve (7-5), and the check valve installed on bottom valve assembly (9) is recuperation valve (9- 3) it is formed by stacking with compression valve (9-5), flowing valve (7-3) and recuperation valve (9-3) by relatively thin few piece annular valve block, stretches valve (7-5) and compression valve (9-5) are formed by stacking by thicker multi-disc annular valve block.
- A kind of 5. combined type MR fluid shock absorber according to claim 4, it is characterised in that：It is the normal restoration stage, living It is up to fill in assembly (7), flowing valve (7-3), stretching valve (7-5), compression valve (9-5) are in normal closed mode, and recuperation valve (9-3) holds Easily to open, the magnetic flow liquid in recovery chamber (Z-1) enters intermediate cavity (Y) by the first normal open hole (3a) of work cylinder barrel (3) upper end, Shoe cream room (X) is converged into via external valve (12), and the magnetic flow liquid in shoe cream room (X) is by recuperation valve (9-3) compensation to compression Chamber (Z-2)；Normal compression stage, piston assembly (7) is descending, and stretching valve (7-5), recuperation valve (9-3), compression valve (9-5), which are in, often closes Closed state, flowing valve (7-3) are opened, and the magnetic flow liquid in compression chamber (Z-2) enters recovery chamber (Z- by flowing valve (7-3) 1), the magnetic flow liquid in recovery chamber (Z-1) enters intermediate cavity (Y) by the first normal open hole (3a) of work cylinder barrel (3) upper end, via External valve (12) converges into shoe cream room (X)；Normal compression and recovery phase, magnetic flow liquid flow by external valve (12) one-way circulation and implement viscosity control, real The regulation and control of existing damping force；Under extreme working position, stretching valve (7-5) and compression valve (9-5) implement overload protection, appropriate to open, Shock absorber works according to Passive Mode.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110925349A (en) * | 2019-11-26 | 2020-03-27 | 重庆大学 | Self-sensing separating type double-cylinder magnetorheological damper |
| CN113915279A (en) * | 2021-10-09 | 2022-01-11 | 北京京西重工有限公司 | Hydraulic damper |
| CN114718977A (en) * | 2022-05-06 | 2022-07-08 | 重庆大学 | Magnetorheological hydro-pneumatic spring |
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| CN203257967U (en) * | 2013-05-28 | 2013-10-30 | 吉林大学 | Screw valve hole type magnetic rheologic vibration damper |
| CN105292248A (en) * | 2015-11-20 | 2016-02-03 | 湖北汽车工业学院 | Automobile rear wheel steering electromagnetic alignment cylinder and use method thereof |
| CN207333554U (en) * | 2017-10-30 | 2018-05-08 | 湖北汽车工业学院 | A kind of combined type MR fluid shock absorber |
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| GB2223822A (en) * | 1988-09-07 | 1990-04-18 | Fichtel & Sachs Ag | Hydraulic vibration damper with variable damping force |
| CN203257967U (en) * | 2013-05-28 | 2013-10-30 | 吉林大学 | Screw valve hole type magnetic rheologic vibration damper |
| CN105292248A (en) * | 2015-11-20 | 2016-02-03 | 湖北汽车工业学院 | Automobile rear wheel steering electromagnetic alignment cylinder and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110925349A (en) * | 2019-11-26 | 2020-03-27 | 重庆大学 | Self-sensing separating type double-cylinder magnetorheological damper |
| WO2021104185A1 (en) * | 2019-11-26 | 2021-06-03 | 重庆大学 | Self-sensing separated dual-cylinder magnetorheological damper |
| CN110925349B (en) * | 2019-11-26 | 2021-07-20 | 重庆大学 | Self-sensing separating type double-cylinder magnetorheological damper |
| CN113915279A (en) * | 2021-10-09 | 2022-01-11 | 北京京西重工有限公司 | Hydraulic damper |
| CN113915279B (en) * | 2021-10-09 | 2023-02-24 | 北京京西重工有限公司 | Hydraulic damper |
| CN114718977A (en) * | 2022-05-06 | 2022-07-08 | 重庆大学 | Magnetorheological hydro-pneumatic spring |
| CN114718977B (en) * | 2022-05-06 | 2024-01-26 | 重庆大学 | Magnetorheological oil-gas spring |
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