CN108533662A - A kind of giant electro-rheological fluid damper - Google Patents
A kind of giant electro-rheological fluid damper Download PDFInfo
- Publication number
- CN108533662A CN108533662A CN201810366708.7A CN201810366708A CN108533662A CN 108533662 A CN108533662 A CN 108533662A CN 201810366708 A CN201810366708 A CN 201810366708A CN 108533662 A CN108533662 A CN 108533662A
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- piston
- fixed plate
- end cover
- piston rod
- giant electro
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Classifications
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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
- F16F9/532—Electrorheological [ER] fluid dampers
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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
- F16F9/3207—Constructional features
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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)
- Vehicle Body Suspensions (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of giant electro-rheological fluid dampers, including piston cylinder, piston rod, piston and fixed plate, piston is two, two pistons are arranged at piston-rod lower end, piston rod and piston are located in piston cylinder, piston cylinder upper end is tightly connected with upper end cover, piston cylinder lower end is tightly connected with bottom end cover, piston rod upper end passes through upper end cover and is tightly connected with upper end cover, giant electro-rheological liquid is full of in piston cylinder, fixed plate passes through piston, the upper end of fixed plate is connect with upper end cover, the lower end of fixed plate is connect with bottom end cover, piston opposite with fixed plate can slide, piston rod connects positive pole or cathode, annular electro pole plate connects power cathode or anode, piston rod, piston and fixed plate are made of electrically conductive material.Double-piston of the present invention makes the relative area of electrode increase, and damping is more obvious；Using giant electro-rheological liquid as the liquid filling body in piston cylinder, the stability height of damper, response are fast, and the damping force adjustable extent of generation is big.
Description
Technical field
The present invention relates to the technical fields of damper, more particularly to a kind of giant electro-rheological fluid damper.
Background technology
Electro rheological fluids are to be dispersed in the suspension liquid formed in the solvent of low-k by the little particle of high-k.
This suspension liquid can make solid particle polarize and interact under DC Electric Field in the moment of Millisecond, be formed flat
Row is in the chain or column structure of electric field, to make this structure shape of similar solid that liquid shows as having certain yield stress
State, makes apparent viscosity increase several orders of magnitude, and this effect for making fluid change state is called electric rheological effect.
Electro-rheological fluid damper be it is a kind of being widely used general energy-eliminating shock-absorbing control device, can be used for machinery, building etc. necks
Domain.Its control mechanism is by the way that the electric rheological effect in damper, the partial vibration energy of structure is consumed by damping material
It dissipates, achievees the purpose that alleviate the outer impact carried, reduces structural vibration, protection structure safety.
Giant electro-rheological liquid is to be dispersed in the one kind formed in the base fluid of giant electro-rheological liquid by polarizable dielectric particles to hang
Supernatant liquid, when applying electric field to it, viscosity, shear strength etc. can transient change, the sizes such as viscosity, intensity with electric field adjusting,
It continuously interior on a large scale can adjust, can reach several orders of magnitude, high viscosity fluid or even solid can be exchanged by low viscosity fluid.
After extra electric field removes, fluid state, this attribute wink between liquid and solid can be restored within the millisecond time
Between it is controllable, reversible, can continuously change, can pass through electric field realize torque controlled delivery and mechanism online stepless, reversible control
System, can substitute traditional electrode machinery conversion component, have extensively in the self adaptive control mechanism industrial circle of electromechanical integration
General application prospect especially has in fields such as national defense construction, the vehicles, hydraulic test, machinery manufacturing industry, sensor technologies
More wide application foundation and application demand is one of the critical material that the development of damping vibration attenuation field is badly in need of.
Done research work is taught according to Hong Kong University of Science and Thchnology Wen Weijia, the novel giant electro-rheological liquid developed at present exists
The yield strength that 130kPa or more can be reached under the electric field strength of 5KV/mm, can meet requirement of engineering completely.But it is this
The coefficient of viscosity of novel giant electro-rheological liquid is only 1/10, the only 0.1Pas that common current becomes liquid, and general electric current
Become the coefficient of viscosity of liquid as 1Pas.Therefore, under similarity condition, common current becomes the viscous damping force that liquid provides and is far longer than newly
The viscous damping forces that type giant electro-rheological liquid provides.
During military service, vibration or shock loading can seriously affect its safety and use for various buildings or mechanical structure
Service life.Installation can be reduced its vibration or shock response, increase its safety with the damping device of passive energy dissipation on above structure
The effective means of property and stability.Traditional passive control damper (such as hydraulic damper) is only capable of providing uncontrollable damping
Power, vibration control effect are undesirable.The intelligent damper prepared using electric/magnetic rheological body, can be by electric/magnetic field intensity
Adjusting come according to operating mode it is real-time continuous adjust damping force, the active and half to realize structural vibration or impact are actively controlled
System, is better protected from the failure damage of structure.Relative to MR damper, become by the electric current of core material of giant current
Damper has many advantages, such as that stability is high, simple in structure, damping force adjustable range is big, response is fast.
According to operation principle, electro-rheological fluid damper is divided into shear mode, flow pattern and composite mode.In Practical Project
In, usually require that electro-rheological fluid damper can provide larger damping force, this makes the er damping using traditional structural design
Body accumulates and quality is larger.In addition, the sliding between ER fluid and damper electrode plate constrains filling for electro rheological fluids performance
Distribution is waved, and practical damping force is caused to be less than theoretical damping power.Therefore, it is badly in need of developing that a kind of small volume, damping force be larger, pole plate
Place is without sliding, novel electrorheological damper simple in structure, to meet the needs of industrial development.
Theoretical and experiment shows：In Practical Project, we with greater need for one kind can at passive control (null field, in the whole field),
The damper of better effects can also be actively played with active control field half, this requires this dampers either passive
Control still all has convenient viscous damping force in half active/active control, and provides larger yield stress.
However, the research at present about the structure design of damper and application is fewer, progress lags behind giant electro-rheological
The research of liquid material self character.
Invention content
The object of the present invention is to provide a kind of giant electro-rheological fluid dampers, to solve the above-mentioned problems of the prior art,
So that the area of damp channel is increased, reduce the sliding between giant electro-rheological liquid and polar board surface, there is simple structure, response speed
Soon, light weight, it is small, damping force is big the advantages that.
To achieve the above object, the present invention provides following schemes：
It is described the present invention provides a kind of giant electro-rheological fluid damper, including piston cylinder, piston rod, piston and fixed plate
Piston is two, and two pistons are arranged at the piston-rod lower end, and the piston rod and the piston are located at the work
In plug tube, the piston cylinder upper end is tightly connected with upper end cover, and the piston cylinder lower end is tightly connected with bottom end cover, the piston
Bar upper end passes through the upper end cover and is tightly connected with the upper end cover, and giant electro-rheological liquid is full of in the piston cylinder, described fixed
Pole plate passes through the piston, the upper end of the fixed plate to be connect with the upper end cover, the lower end of the fixed plate and the lower end
Lid connection, the piston opposite with the fixed plate can slide, and the piston rod connects positive pole or cathode, the annular electro
Pole plate connects power cathode or anode, and the piston rod, the piston and the fixed plate are made of electrically conductive material.
Preferably, the fixed plate be at least two sections at minor arc shape electrode plate, the piston be equipped with it is described
The threading hole that fixed plate matches.
Preferably, the fixed plate is uniformly distributed centered on the piston rod, and all fixed plates are independent of one another.
Preferably, there are the gaps of 1mm-3mm between the outer wall of the fixed plate and the inner wall in the threading hole.
Preferably, the piston rod is equipped with a boss, one of them described piston is set to the boss side, another
A piston is set to the boss other side, and two pistons are fixed by a nut respectively.
Preferably, the upper end of the piston rod also extends through a bearing assembly, the bearing assembly include bearing block, bearing and
Bearing (ball) cover, the bearing block are secured by bolts on the upper end cover, and the piston rod passes through the bearing and the axis
Bearing is slidably connected, and the bearing (ball) cover is tightly connected with the bearing block.
Preferably, an inlet opening and a wire guide are provided on the upper end cover, the inlet opening is blocked with rubber stopper, institute
Wire guide is stated to be blocked with wire passing plug.
Preferably, the surface of the fixed plate is equipped with several micropore pits.
Preferably, a protrusion to match with the fixed plate is provided on the bottom end cover, the fixed plate bottom is logical
It crosses bolt to connect with the protrusion, the fixed plate top is clamped with the upper end cover.
Preferably, between the upper end cover and bottom end cover and the piston cylinder and the piston rod and the upper end cover it
Between be both provided with sealing ring.
The present invention achieves following technique effect compared with the existing technology：
1. double-piston of the present invention makes the relative area of electrode increase, damping is more obvious.
2. the present invention is using giant electro-rheological liquid as the liquid filling body in piston cylinder, the stability height of damper, response are fast,
The damping force adjustable extent of generation is big.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of giant electro-rheological liquid of the present invention damping；
Fig. 2 is the three dimensional structure diagram of giant electro-rheological fluid damper of the present invention；
Fig. 3 is the sectional view of A-A in Fig. 1 of the present invention；
Fig. 4 is the sectional view of B-B in Fig. 1 of the present invention；
Fig. 5 is the structural schematic diagram of giant electro-rheological liquid damper piston and fixed plate of the present invention；
Fig. 6 is the structural schematic diagram of giant electro-rheological fluid damper upper end cover of the present invention；
Wherein：1- piston rods, 2- pistons, 3- bottom end covers, 4- sealing rings, 5- fixed plates, 6- bolts, 7- nuts, 8- pistons
Cylinder, 9- gaskets, 10- upper end covers, 11- bearing blocks, 12- rubber washers, 13- rubber stoppers, 14- wire passing plugs, 15- bearing (ball) covers, 16-
Bearing.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making the creative labor it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is of the existing technology to solve the problems, such as the object of the present invention is to provide a kind of giant electro-rheological fluid damper, make resistance
The area in Buddhist nun channel increases, and reduces the sliding between giant electro-rheological liquid and polar board surface, has simple structure, fast response time, matter
Measure the advantages that light, small, damping force is big.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
As shown in figs 1 to 6：Present embodiments provide a kind of giant electro-rheological fluid damper, including piston cylinder 8, piston rod 1,
Piston 2 and fixed plate 5.Piston 2 in the present embodiment is two, and two pistons 2 are arranged at 1 lower end of piston rod.Of piston 2
Number may be arranged as multiple, and piston rod 1 and piston 2 are located in piston cylinder 8, wherein the periphery wall of piston 2 and 8 inner wall of piston cylinder
Between there are gaps not to contact.8 upper end of piston cylinder is tightly connected with upper end cover 10, and 8 lower end of piston cylinder is tightly connected with bottom end cover 3,
1 upper end of piston rod passes through upper end cover 10 and is tightly connected with upper end cover 10, and giant electro-rheological liquid is full of in piston cylinder 8.Fixed plate 5 is worn
Cross piston 2, the upper end of fixed plate 5 is connect with upper end cover 10, and the lower end of fixed plate 5 is connect with bottom end cover 3, piston 2 can with it is fixed
Pole plate 5 is opposite to be slided, and piston rod 1 connects positive pole or cathode, and annular electro pole plate connects power cathode or anode, piston rod 1, piston
2 and fixed plate 5 be made of electrically conductive material, piston 2 is connect with piston rod 1, can be with identical electricity.Wherein, living using bilayer
Plug, makes the relative area of generation electric field increase, damping becomes apparent from；Using this material of giant electro-rheological liquid, damper it is steady
The qualitative adjustable extent of damping force that is very high, generating is big, response is fast.
Specifically, upper end cover 10 and bottom end cover 3 are connect by bolt 6, gasket 9 with piston cylinder 8, gasket 9 in the present embodiment
For flat shim.Sealing is both provided between upper end cover 10 and bottom end cover 3 and piston cylinder 8 and between piston rod 1 and upper end cover 10
Circle 4 fully ensures the sealing in piston cylinder 8.
Fixed plate 5 is electrode plate of at least two sections at minor arc shape, and piston 2 is equipped with and is worn with what fixed plate 5 matched
Plate hole, it is independent between threading hole not to be connected to.The setting of the electrode plate of minor arc shape can increase the electrode area for applying electric field, use
The form of the electrode plate of annular surface makes the inner side and outer side of annular electro pole-face form the gap between electrode with piston 2, is having
Two layers of damp channel is formd in the space of limit, so that the area of damp channel is increased, damping is more preferably.Fixed plate 5 is with piston
Uniformly distributed centered on bar 1, all fixed plates 5 do not touch independently of one another.Wherein, the surface of fixed plate 5 is equipped with several micropore pits,
The pole plate handled using surface craterization, can significantly reduce the sliding between giant electro-rheological liquid and polar board surface, damping is more
It is good.There are the gap of 1mm-3mm between the outer wall and the inner wall in threading hole of fixed plate 5, ensure piston 2 without frictionally moving.
Piston rod 1 is equipped with a boss, and one of piston 2 is set to boss side, another piston 2 is set to boss
The other side, two pistons 2 are fixed by a nut 7 respectively.Boss is used for two end faces by centre to two pistons 2
Limit, another two end face of the nut 7 for two pistons 2 are fixed and limit, and the use of nut 7 is convenient for piston 2
Installation and removal.
The upper end of piston rod 1 also extends through a bearing assembly, and bearing assembly includes bearing block 11, bearing 16 and bearing (ball) cover
15, bearing block 11 is fixed on by bolt 6 on upper end cover 10, and piston rod 1 is slidably connected by bearing 16 and bearing block 11, bearing
16 preferably linear bearing, bearing (ball) covers 15 are tightly connected with bearing block 11.It is provided with rubber between bearing block 11 and upper end cover 10
Rubber gasket 12 is sealed.
An inlet opening and a wire guide are provided on upper end cover 10, inlet opening is blocked with rubber stopper 13, wire guide threading
Plug 14 blocks, and fully ensures the leakproofness of piston cylinder 8.It is provided with a protrusion to match with fixed plate 5 on bottom end cover 3, determines pole
5 bottom of plate is connect by bolt 6 with protrusion, and 5 top of fixed plate is clamped with upper end cover 10.It is arranged on upper end cover 10 in the present embodiment
It is fluted, the clamping portion with matching grooves is provided on fixed plate 5.
Working principle of the present invention is as follows：
After filling giant electro-rheological liquid in piston cylinder 8, closure sealing is carried out with rubber stopper 13, piston rod 1 can pass through connection
The components such as pin are connected with the device of vibration damping is needed, and piston rod 1 pumps under the drive for needing vibration absorber.In work
Connection positive pole or cathode on plug 2, makes piston 2 and piston rod 1 is all positively charged or negative electricity, and power cathode is connected in fixed plate 5
Or anode, keep fixed plate 5 negatively charged or positive electricity.In this way, it is formed electric field between piston 2 and piston rod 1 and fixed plate 5,
Giant electro-rheological liquid between piston 2 and fixed plate 5 will be caused by piston 2 and fixed plate 5 under the action of electric field, huge electric current
The rheological property moment for becoming liquid changes because of the change of electric field, and viscosity increases, damped coefficient becomes larger.When about 2 piston is past
When moving again, electric field just generates shearing damp active force to giant electro-rheological liquid therein；Make in piston cylinder 8 because piston 2 moves
Giant electro-rheological liquid generate flowing, and then electric field just to giant electro-rheological liquid therein generate flow damping active force.
The present embodiment applies the characteristic that the shear strength of giant electro-rheological liquid can change with applied voltage Strength Changes,
Apply the effectiveness in vibration suppression in vibration absorber good.
Specific case is applied in this specification, and principle and implementation of the present invention are described, above example
Explanation be merely used to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
1. a kind of giant electro-rheological fluid damper, it is characterised in that：Including piston cylinder, piston rod, piston and fixed plate, the piston
It it is two, two pistons are arranged at the piston-rod lower end, and the piston rod and the piston are located at the piston cylinder
Interior, the piston cylinder upper end is tightly connected with upper end cover, and the piston cylinder lower end is tightly connected with bottom end cover, on the piston rod
End is tightly connected across the upper end cover and with the upper end cover, and giant electro-rheological liquid, the fixed plate are full of in the piston cylinder
Across the piston, the upper end of the fixed plate is connect with the upper end cover, and the lower end of the fixed plate connects with the bottom end cover
It connects, the piston opposite with the fixed plate can slide, and the piston rod connects positive pole or cathode, the annular electro pole plate
Power cathode or anode are connect, the piston rod, the piston and the fixed plate are made of electrically conductive material.
2. giant electro-rheological fluid damper according to claim 1, it is characterised in that：The fixed plate is at least two sections
At the electrode plate of minor arc shape, the piston is equipped with the threading hole to match with the fixed plate.
3. giant electro-rheological fluid damper according to claim 2, it is characterised in that：The fixed plate is with the piston rod
Center is uniformly distributed, and all fixed plates are independent of one another.
4. giant electro-rheological fluid damper according to claim 3, it is characterised in that：The outer wall of the fixed plate is worn with described
There are the gaps of 1mm-3mm between the inner wall of plate hole.
5. giant electro-rheological fluid damper according to claim 1, it is characterised in that：The piston rod is equipped with a boss,
One of them described piston is set to the boss side, another described piston is set to the boss other side, two institutes
Piston is stated to be fixed by a nut respectively.
6. giant electro-rheological fluid damper according to claim 1, it is characterised in that：The upper end of the piston rod also extends through one
Bearing assembly, the bearing assembly include bearing block, bearing and bearing (ball) cover, and the bearing block is secured by bolts on described
On end cap, the piston rod is slidably connected by the bearing and the bearing block, and the bearing (ball) cover and the bearing block are close
Envelope connection.
7. giant electro-rheological fluid damper according to claim 1, it is characterised in that：A feed liquor is provided on the upper end cover
Hole and a wire guide, the inlet opening are blocked with rubber stopper, and the wire guide is blocked with wire passing plug.
8. giant electro-rheological fluid damper according to claim 1, it is characterised in that：The surface of the fixed plate is equipped with several
A micropore pit.
9. giant electro-rheological fluid damper according to claim 1, it is characterised in that：One and institute are provided on the bottom end cover
The protrusion that fixed plate matches is stated, fixed plate bottom is connect by bolt with the protrusion, the fixed plate top and institute
State upper end cover clamping.
10. giant electro-rheological fluid damper according to claim 1, it is characterised in that：The upper end cover and bottom end cover and institute
It states between piston cylinder and is both provided with sealing ring between the piston rod and the upper end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366708.7A CN108533662B (en) | 2018-04-23 | 2018-04-23 | A kind of giant electro-rheological fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366708.7A CN108533662B (en) | 2018-04-23 | 2018-04-23 | A kind of giant electro-rheological fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108533662A true CN108533662A (en) | 2018-09-14 |
| CN108533662B CN108533662B (en) | 2019-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810366708.7A Active CN108533662B (en) | 2018-04-23 | 2018-04-23 | A kind of giant electro-rheological fluid damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752235A (en) * | 2019-03-27 | 2019-05-14 | 上海大学 | A kind of giant electro-rheological liquid extruding force test device |
| CN115596795A (en) * | 2022-10-27 | 2023-01-13 | 重庆大学（Cn） | Viscous inertia damper |
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| CN200975034Y (en) * | 2006-10-13 | 2007-11-14 | 北京工业大学 | Double extending rod double cylinder electrical current changeable damper |
| CN102287476A (en) * | 2011-07-14 | 2011-12-21 | 大连理工大学 | Multilayer fixed pole plate fluid type electro-rheological damper |
| CN103591209A (en) * | 2013-11-08 | 2014-02-19 | 青岛农业大学 | Seven-level adjustable reciprocating type electrorheological fluid damper |
| JP2017015244A (en) * | 2015-06-30 | 2017-01-19 | 日立オートモティブシステムズ株式会社 | Cylinder device |
| CN106907422A (en) * | 2015-12-23 | 2017-06-30 | 上海汽车集团股份有限公司 | Electrorheological fluid vibration damper and its control method, control unit, ECU and automobile |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200975034Y (en) * | 2006-10-13 | 2007-11-14 | 北京工业大学 | Double extending rod double cylinder electrical current changeable damper |
| CN102287476A (en) * | 2011-07-14 | 2011-12-21 | 大连理工大学 | Multilayer fixed pole plate fluid type electro-rheological damper |
| CN103591209A (en) * | 2013-11-08 | 2014-02-19 | 青岛农业大学 | Seven-level adjustable reciprocating type electrorheological fluid damper |
| JP2017015244A (en) * | 2015-06-30 | 2017-01-19 | 日立オートモティブシステムズ株式会社 | Cylinder device |
| CN106907422A (en) * | 2015-12-23 | 2017-06-30 | 上海汽车集团股份有限公司 | Electrorheological fluid vibration damper and its control method, control unit, ECU and automobile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752235A (en) * | 2019-03-27 | 2019-05-14 | 上海大学 | A kind of giant electro-rheological liquid extruding force test device |
| CN115596795A (en) * | 2022-10-27 | 2023-01-13 | 重庆大学（Cn） | Viscous inertia damper |
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| Publication number | Publication date |
|---|---|
| CN108533662B (en) | 2019-07-05 |
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