CN108708927A - A kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film - Google Patents
A kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film Download PDFInfo
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- CN108708927A CN108708927A CN201810505534.8A CN201810505534A CN108708927A CN 108708927 A CN108708927 A CN 108708927A CN 201810505534 A CN201810505534 A CN 201810505534A CN 108708927 A CN108708927 A CN 108708927A
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- annular magnet
- end annular
- dielectric elastomer
- fixed frame
- elastomer film
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
Abstract
The invention discloses a kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film, which includes multilayer dielectric elastomer film spring, multiple annular magnets；Multilayer dielectric elastomer film spring is in such a way that multilayer dielectric elastomer film, multilayer conductive electrode are superimposed, and the polarity of adjacent conductive electrode is opposite；The nonlinear restoring force that the vibration isolator is generated using the annular magnet to attract each other is to realize non-linear negative stiffness, by changing the driving voltage being applied on the conductive electrode of multilayer dielectric elastomer film spring, multilayer dielectric elastomer film spring is set to provide matched positive rigidity, the quasi- zero stiffness near operating position is realized in the combination of positive negative stiffness, is effectively reduced the intrinsic frequency of vibrating isolation system；Since multilayer dielectric elastomer film spring provides the positive rigidity of regulating and controlling voltage, the limited disadvantage of single layer dielectric elastomer film regulation and control rigidity ability is overcome, the range of adjustable and controllable rigidity is substantially increased, realizes the regulation and control of rigidity.
Description
Technical field
The present invention relates to vibration isolation technique field, more particularly to a kind of stiffness variable vibration isolation based on multilayer dielectric elastomer film
Device.
Background technology
In engineering, the vibration of mechanical equipment is a kind of generally existing and is increasingly subject to people's concern.These vibrations will draw
The moderate finite deformation and stress much larger than quiescent operation load are played, this will cause huge puzzlement to the normal work of mechanical equipment.
For example, the vibration of litho machine can influence machining accuracy to substantially reduce the yield rate of semiconductor chip, microscopical vibration meeting
The clarity of imaging is caused to substantially reduce.In order to reduce this influence, an effective measures are exactly in vibration source and vibrating body
Between be inserted into vibration isolator to realize vibration isolation.But when carrying out design of vibration isolator, it is necessary to design isolation mounting appropriate
Parameter can amplify excitation instead not only otherwise vibrating isolation system cannot play the role of vibration isolation.When driving frequency is more than vibrating isolation system
Intrinsic frequencyTimes when, traditional linear vibration isolator just starts to play a role, but the vibration of low-frequency range is often difficult to
Realize effective isolation.Since the vibration isolation frequency band of general linear vibration isolator is restricted, in order to have to low-frequency vibration
The inhibition of effect, frequently with a kind of method be to widen vibration isolation frequency band by reducing the rigidity of vibrating isolation system, but reduce vibration isolation system
The rigidity of system will cause quiet deformation to increase, and reduce the stability of system.Although some vibration isolators may be implemented in equilbrium position
The neighbouring low dynamic rate of high static rigidity, but cannot achieve the active control of rigidity.
Invention content
The object of the present invention is to provide a kind of Variable Stiffness Vibration Isolators based on multilayer dielectric elastomer film, and the vibration isolator is not
It can only realize the low dynamic rate of high static rigidity near equilbrium position, additionally it is possible to realize the active control of rigidity.
To achieve the above object, the present invention provides following schemes：
A kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film, the Variable Stiffness Vibration Isolator include：Multilayer
Dielectric elastomer film spring, is set the middle-end annular magnet being arranged in the central cavity of the multilayer dielectric elastomer film spring
It sets and is situated between in the multilayer in the middle-end annular magnet cover board of the central cavity upper end of the multilayer dielectric elastomer film spring, setting
The middle-end annular magnet bottom plate of the central cavity lower end of electric elastomer film spring, both ends are threaded the guiding axis of section；It is described to lead
It is connect to one end of axis with mass block by screw thread；The axially nested linear bearing in middle section of the guiding axis is described to limit
The movement of guiding axis horizontal direction；Upper end annular magnet fixed frame is arranged in the external of the linear bearing；The upper end annular magnetic
Upper end annular magnet is placed in the cavity formed between ferropexy frame and the linear bearing；The upper end annular magnet is fixed
The upper end annular magnet cap plate that the top open part setting of frame matches with the upper end annular magnet fixed frame；The guiding axis
Other end thread segment sequentially pass through the upper end annular magnet fixed frame, the threaded hole of the middle-end annular magnet cover board, institute
The threaded hole for stating middle-end annular magnet is fixed in the threaded hole of the middle-end annular magnet bottom plate；The multilayer dielectric elasticity
The external insulation fixed frame upper support frame setting up and down and lower bracing frame of body film spring, and pass through hexagonal cylindrical head spiral shell in first
Bolt, with described first in the matched nut of six point cylindrical head bolt by the external insulation fixed frame, the upper support frame with
And the lower bracing frame is fixed together；The upper side of the upper support frame by the first hexagon socket cap head screw with it is described
Upper end annular magnet fixed frame is connected；Lower end annular magnet fixed frame is set below the middle-end annular magnet bottom plate；It is described
Lower end annular magnet fixed frame is connected by the lower end side of the second hexagon socket cap head screw and the lower bracing frame；Under described
It holds and lower end annular magnet bottom plate is set at the bottom opening of annular magnet fixed frame, and will by third hexagon socket cap head screw
The lower end annular magnet fixed frame and the lower end annular magnet bottom plate are fixed together, and solid in the lower end annular magnet
Determine to be placed with lower end annular magnet in the cavity formed between frame and the lower end annular magnet bottom plate；The middle-end annular magnet
Pole polarity and the upper end annular magnet pole polarity on the contrary, the pole polarity of the middle-end annular magnet with it is described under
The pole polarity of annular magnet is held on the contrary, and the middle-end annular magnet, the upper end annular magnet and lower end annular
Magnet constitutes magnetic negative rigidity mechanism；
Wherein, the centre of the multilayer dielectric elastomer film spring is Kafra fiber sandwich, the multilayer dielectric elasticity
The insulation fixed frame of body film spring is made of the external insulation fixed frame and interior insulation fixed frame；It tows in the Kev
The upper and lower of dimension laminboard layer is respectively provided with the identical laminated construction of multiple and quantity, and passes through the external insulation fixed frame and described interior
The Kafra fiber sandwich, multiple laminated construction are fixed by insulation fixed frame；The laminated construction is under upper
It include the first conductive electrode, dielectric elastomer diaphragm and the second conductive electrode successively, and first conductive electrode and described
The polarity of second conductive electrode is opposite and is in crossing distribution.
Optionally, the polarity of the electrode of the adjacent laminated construction is opposite and is in crossing distribution.
Optionally, the multilayer dielectric elastomer film spring further includes insulating tape；The insulating tape is arranged described
Between the insulation fixed frame and the laminated construction of multilayer dielectric elastomer film spring.
Optionally, the upper end annular magnet cap plate is solid by the 4th hexagon socket cap head screw and the linear bearing
Even.
Optionally, the middle-end annular magnet cover board, the interior insulation fixed frame, the middle-end annular magnet bottom plate are logical
Cross in second six point cylindrical head bolt and with described second in the matched nut of six point cylindrical head bolt be consolidated.
Optionally, the middle-end annular magnet, the upper end annular magnet and the lower end annular magnet are annular
Permanent magnet, and the interval between the upper end annular magnet, the middle-end annular magnet, the lower end annular magnet is
15mm。
Optionally, the dielectric elastomer diaphragm is the PDMS films by pre-stretching processing.
Optionally, the material of the external insulation fixed frame and the interior insulation fixed frame is fiber-reinforced composite material
Material.
Optionally, the material of first conductive electrode and second conductive electrode is to carry carbon silicon rubber.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
The present invention provides a kind of Variable Stiffness Vibration Isolators based on multilayer dielectric elastomer film, this vibration isolator is using mutually
The nonlinear restoring force that the annular magnet of attraction generates is to realize that non-linear negative stiffness, multilayer dielectric elastomer film spring provide electricity
The positive rigidity of regulation and control, the combination of positive negative stiffness is pressed to make the quasi- zero stiffness near operating position, realize the height near equilbrium position
The low dynamic rate of static rigidity.This vibration isolator is applied in such a way that multilayer dielectric elastomer film is superimposed, and by changing
Driving voltage on conductive electrode makes the positive rigidity that multilayer dielectric elastomer film spring is provided change, overcomes single layer
Dielectric elastomer film regulates and controls the limited disadvantage of rigidity ability, the range of adjustable and controllable rigidity is substantially increased, to realize rigidity
Regulation and control.
In addition, the vibration isolator also has many advantages, such as simple in structure, rigidity is controllable, is effectively reduced the intrinsic frequency of vibrating isolation system
Rate widens vibration isolation frequency band.
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 structure planing surface figure of Variable Stiffness Vibration Isolator of the embodiment of the present invention based on multilayer dielectric elastomer film；
Fig. 2 is that the present invention is based on the stereoscopic schematic diagrams of the Variable Stiffness Vibration Isolator of multilayer dielectric elastomer film；
Fig. 3 is the structural schematic diagram of bilayer dielectric elastomer film spring of the present invention；
Fig. 4 is electrode arrangement schematic diagram of the present invention.
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, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of Variable Stiffness Vibration Isolators based on multilayer dielectric elastomer film, and the vibration isolator is not
It can only realize the low dynamic rate of high static rigidity near equilbrium position, additionally it is possible to realize the active control of rigidity.
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.
Dielectric elastomer is a kind of electrostrictive material, and when high input voltage is into row energization, dielectric elastomer will produce
Maxwell's stress, it is flexible so as to cause larger strain；Therefore, dielectric elastomer is realized by regulating and controlling voltage to dielectric elastomeric
The regulation and control of body film rigidity.
In addition dielectric elastomer also has higher electromechanical conversion efficiency, and light weight, price are low, movement is flexible, are easy into
The advantages that shape and damage not easy to fatigue, is often used to make softness, lightly, driver or energy with high-energy conversion efficiency
Converter.
Fig. 1 is the structure planing surface figure of Variable Stiffness Vibration Isolator of the embodiment of the present invention based on multilayer dielectric elastomer film, Fig. 2
For the present invention is based on the stereoscopic schematic diagrams of the Variable Stiffness Vibration Isolator of multilayer dielectric elastomer film.
As depicted in figs. 1 and 2, Variable Stiffness Vibration Isolator provided in an embodiment of the present invention includes multilayer dielectric elastomer film bullet
Spring 1, is arranged in the multilayer middle-end annular magnet 2 being arranged in the central cavity of the multilayer dielectric elastomer film spring 1
The middle-end annular magnet cover board 3 of the central cavity upper end of dielectric elastomer film spring 1 is arranged in the multilayer dielectric elastomer film
The middle-end annular magnet bottom plate 4 of the central cavity lower end of spring 1, both ends are threaded the guiding axis 5 of section.
One end of the guiding axis 5 is connect by screw thread with mass block 6；The middle section of the guiding axis 5 is axially nested
Linear bearing 7 is to limit the movement of 5 horizontal direction of the guiding axis；Upper end annular magnet is arranged in the external of the linear bearing 7
Fixed frame 8；Upper end annular is placed in the cavity formed between the upper end annular magnet fixed frame 8 and the linear bearing 7
Magnet 9；The top open part setting of the upper end annular magnet fixed frame 8 matches with the upper end annular magnet fixed frame 8
Upper end annular magnet cap plate 10；The other end thread segment of the guiding axis 5 sequentially passes through the upper end annular magnet fixed frame
8, the threaded hole of the threaded hole of the middle-end annular magnet cover board 3, the middle-end annular magnet 2 is fixed on the middle-end annular
In the threaded hole of magnet bottom plate 4.
The external insulation fixed frame upper support frame 11 setting up and down and lower bracing frame of the multilayer dielectric elastomer film spring 1
12, and by six point cylindrical head bolt 13 in first, with described first in 13 matched nut of six point cylindrical head bolt by institute
External insulation fixed frame, the upper support frame 11 and the lower bracing frame 12 is stated to be fixed together；The upper support frame 11
Upper side is connected by the first hexagon socket cap head screw 14 with the upper end annular magnet fixed frame 8；In the middle end ring
Lower end annular magnet fixed frame 15 is arranged in 4 lower section of shape magnet bottom plate；The lower end annular magnet fixed frame 15 passes through in second six
Angle fillister head screw 16 and the lower end side of the lower bracing frame 12 are connected；It opens the bottom of the lower end annular magnet fixed frame 15
Lower end annular magnet bottom plate 17 is set at mouthful, and is fixed the lower end annular magnet by third hexagon socket cap head screw 18
Frame 15 and the lower end annular magnet bottom plate 17 are fixed together, and in the lower end annular magnet fixed frame 15 and the lower end
Lower end annular magnet 19 is placed in the cavity formed between annular magnet bottom plate 17.
The upper end annular magnet cap plate 10 is connected by the 4th hexagon socket cap head screw 20 with the linear bearing 7.
The interior insulation fixed frame, described of the middle-end annular magnet cover board 3, the multilayer dielectric elastomer film spring 1
Middle-end annular magnet bottom plate 4 by six point cylindrical head bolt 21 in second and with described second in 21 phase of six point cylindrical head bolt
The nut of cooperation is consolidated, i.e., the described middle-end annular magnet cover board 3, interior insulation fixed frame, the middle-end annular magnet
Bottom plate 4 forms a cavity, and middle-end annular magnet 2 is placed in this cavity.
The centre of the multilayer dielectric elastomer film spring 1 is Kafra fiber sandwich, the multilayer dielectric elastomer film
The insulation fixed frame of spring is made of the external insulation fixed frame and the interior insulation fixed frame；It tows in the Kev
The upper and lower of dimension laminboard layer is respectively provided with the identical laminated construction of multiple and quantity, and passes through the external insulation fixed frame and described interior
The Kafra fiber sandwich, multiple laminated construction are fixed by insulation fixed frame；The laminated construction from it is upper it
Under include successively the first conductive electrode, dielectric elastomer diaphragm and the second conductive electrode, i.e. dielectric elastomer diaphragm is located at institute
Laminated construction middle layer is stated, and the polarity of first conductive electrode and second conductive electrode is opposite and divides in cross
Cloth.In addition, the polarity of the electrode of the adjacent laminated construction is also opposite and is also in crossing distribution, such as the first laminated construction
It is adjacent with the second laminated construction, then the polarity of the first laminated construction electrode adjacent with the second laminated construction it is also opposite and
In crossing distribution.
The multilayer dielectric elastomer film spring further includes insulating tape；The insulating tape is arranged in the multilayer dielectric
Between the insulation fixed frame and the laminated construction of elastomer film spring.
The dielectric elastomer diaphragm is the PDMS films by pre-stretching processing.The external insulation fixed frame and described interior
The material of insulation fixed frame is fibre reinforced composites.The material of first conductive electrode and second conductive electrode
Material is to carry carbon silicon rubber.
The pole polarity of the middle-end annular magnet 2 and the pole polarity of the upper end annular magnet 9 are on the contrary, the middle-end
The pole polarity of annular magnet 2 and the pole polarity of the lower end annular magnet 19 are on the contrary, for example, 9 top of upper end annular magnet
For the poles S, annular magnet 9 lower part in upper end is the poles N, and 2 top of middle-end annular magnet is the poles S, and 2 lower part of middle-end annular magnet is the poles N, under
It is the poles S to hold 19 top of annular magnet, and annular magnet 19 lower part in lower end is the poles N.
The middle-end annular magnet 2, the upper end annular magnet 9 and the lower end annular magnet 19 constitute magnetic negative stiffness
Mechanism；The middle-end annular magnet 2, the upper end annular magnet 9 and the lower end annular magnet 19 are annular permanent magnet,
And the interval between the upper end annular magnet 9, the middle-end annular magnet 2, the lower end annular magnet 19 is 15mm.
All part materials are non-magnet material in vibration isolator provided by the invention.
The vibration isolation way of the present invention is as follows：
When vibration isolator is in without excitation state, suction of the middle-end annular magnet in upper end annular magnet, lower end annular magnet
Reach an equilibrium state under the multilayer dielectric elastomer film spring-loaded of graviational interaction and no current state；When vibration isolator
When pedestal is by dynamic excitation, moving up and down in vertical direction can occur for middle-end annular magnet, therefore magnetic negative rigidity mechanism is produced
Raw negative stiffness (i.e. upper end annular magnet, the resultant direction of lower end annular magnet centering end annular magnet active force and middle-end annular
The direction of motion of magnet is identical), at this point, multilayer dielectric elastomer film spring works, driving voltage load is in multilayer dielectric elasticity
On the electrode of the dielectric elastomer film both sides of body film spring (electrode is connected by scale copper with external power supply), electric current is via outside
Conducting wire flows to another electrode from an electrode so that the opposite charge of symbol on the electrode band of both sides.Multilayer dielectric elastomer film
Spring generates deformation under the action of Maxwell's stress, and stretches extension in the in-plane direction, while thickness becomes smaller.It crosses herein
The electric energy of Cheng Zhong, application are converted to for mechanical energy, i.e. multilayer dielectric elastomer film spring provides matched positive rigidity,
Limit the over-travel of middle-end annular magnet.
Fig. 3 is the structural schematic diagram of bilayer dielectric elastomer film spring, as shown in figure 3, bilayer dielectric elastomer film spring
Including external insulation fixed frame 22, interior insulation fixed frame 23,25,4 layers of conductive electrode 24 of insulating tape, there are 2 layers of dielectric elastomeric
Body diaphragm 26, Kafra fiber sandwich 27.Kafra fiber sandwich 27 is located among bilayer dielectric elastomer film spring, in Kev
Tow dimension sandwich 27 upper surface set gradually from bottom to up conductive electrode 24, dielectric elastomer diaphragm 26, conductive electrode 24, absolutely
Edge adhesive tape 25, fixed frame (fixed frame includes external insulation fixed frame 22, interior insulation fixed frame 23 herein) are drawn in Kev
The lower face of fiber sandwich 27 sets gradually conductive electrode 24, dielectric elastomer diaphragm 26, conductive electrode 24, insulation from top to bottom
Adhesive tape 25, fixed frame (fixed frame includes external insulation fixed frame 22, interior insulation fixed frame 23 herein).Wherein, dielectric
24 cross-distribution of elastomer diaphragm 26 and conductive electrode, and adjacent conductive polarity of electrode is opposite and divides in cross as shown in Figure 4
Cloth.
The present invention changes the driving electricity being applied on conductive electrode in such a way that multilayer dielectric elastomer film is superimposed
Pressure, to which the positive rigidity for making multilayer dielectric elastomer film spring be provided changes, overcomes single layer dielectric elastomer film tune
The limited disadvantage of rigidity ability is controlled, the range of adjustable and controllable rigidity is substantially increased, to realize the regulation and control of rigidity.
It should be noted that be a bit because magnetic negative rigidity mechanism is typically in a unsure state, therefore in displacement
It needs to ensure that positive rigidity is more slightly larger than negative stiffness in range, cancelling out each other for positive negative stiffness reaches the state of quasi- zero stiffness, to real
Now low-frequency vibration is effectively isolated.In addition, driving voltage do not answer it is excessively high, with anti-breakdown dielectric elastomer film.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (9)
1. a kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film, which is characterized in that the Variable Stiffness Vibration Isolator
Including：Multilayer dielectric elastomer film spring, the middle end ring being arranged in the central cavity of the multilayer dielectric elastomer film spring
Shape magnet, be arranged the central cavity upper end of the multilayer dielectric elastomer film spring middle-end annular magnet cover board, setting exist
The middle-end annular magnet bottom plate of the central cavity lower end of the multilayer dielectric elastomer film spring, both ends are threaded the guiding of section
Axis；One end of the guiding axis is connect by screw thread with mass block；The axially nested linear bearing in middle section of the guiding axis
To limit the movement of the guiding axis horizontal direction；Upper end annular magnet fixed frame is arranged in the external of the linear bearing；It is described
It is placed with upper end annular magnet in the cavity formed between upper end annular magnet fixed frame and the linear bearing；The top ring
The upper end annular magnet cap plate that the top open part setting of shape magnet fixed frame matches with the upper end annular magnet fixed frame；
The other end thread segment of the guiding axis sequentially passes through the upper end annular magnet fixed frame, the middle-end annular magnet cover board
The threaded hole of threaded hole, the middle-end annular magnet is fixed in the threaded hole of the middle-end annular magnet bottom plate；The multilayer
The external insulation fixed frame upper support frame setting up and down and lower bracing frame of dielectric elastomer film spring, and justified by hexagonal in first
Stud bolt, with described first in the matched nut of six point cylindrical head bolt by the external insulation fixed frame, the upper branch
Support and the lower bracing frame are fixed together；The upper side of the upper support frame passes through the first hexagon socket cap head screw
It is connected with the upper end annular magnet fixed frame；Lower end annular magnet is arranged below the middle-end annular magnet bottom plate to fix
Frame；The lower end annular magnet fixed frame is solid by the lower end side of the second hexagon socket cap head screw and the lower bracing frame
Even；Lower end annular magnet bottom plate is set at the bottom opening of the lower end annular magnet fixed frame, and is justified by hexagonal in third
The lower end annular magnet fixed frame and the lower end annular magnet bottom plate are fixed together by chapiter screw, and in the lower end
It is placed with lower end annular magnet in the cavity formed between annular magnet fixed frame and the lower end annular magnet bottom plate；In described
Hold the pole polarity of annular magnet with the pole polarity of the upper end annular magnet on the contrary, the magnetic pole pole of the middle-end annular magnet
Property with the pole polarity of the lower end annular magnet on the contrary, and the middle-end annular magnet, the upper end annular magnet and institute
It states lower end annular magnet and constitutes magnetic negative rigidity mechanism；
Wherein, the centre of the multilayer dielectric elastomer film spring is Kafra fiber sandwich, the multilayer dielectric elastomer film
The insulation fixed frame of spring is made of the external insulation fixed frame and interior insulation fixed frame；It is pressed from both sides in the Kafra fiber
The upper and lower of sandwich layer is respectively provided with the identical laminated construction of multiple and quantity, and passes through the external insulation fixed frame and the interior insulation
The Kafra fiber sandwich, multiple laminated construction are fixed by fixed frame；The laminated construction under upper successively
Including the first conductive electrode, dielectric elastomer diaphragm and the second conductive electrode, and first conductive electrode and described second
The polarity of conductive electrode is opposite and is in crossing distribution.
2. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the pole of the electrode of the adjacent laminated construction
Property it is opposite and be in crossing distribution.
3. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the multilayer dielectric elastomer film spring is also
Including insulating tape；The insulating tape be arranged insulation fixed frame in the multilayer dielectric elastomer film spring with it is described folded
Between layer structure.
4. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the upper end annular magnet cap plate passes through
Four hexagon socket cap head screws are connected with the linear bearing.
5. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the middle-end annular magnet cover board, described
Interior insulation fixed frame, the middle-end annular magnet bottom plate by six point cylindrical head bolt in second and with described second in six
Cylinder head bolt matched nut in angle is consolidated.
6. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the middle-end annular magnet, the upper end
Annular magnet and the lower end annular magnet are annular permanent magnet, and the upper end annular magnet, the middle-end annular magnetic
Interval between iron, the lower end annular magnet is 15mm.
7. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the dielectric elastomer diaphragm is by pre-
The PDMS films of stretch processing.
8. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that the external insulation fixed frame and described interior
The material of insulation fixed frame is fibre reinforced composites.
9. Variable Stiffness Vibration Isolator according to claim 1, which is characterized in that first conductive electrode and described second
The material of conductive electrode is to carry carbon silicon rubber.
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| CN201810505534.8A CN108708927B (en) | 2018-05-24 | 2018-05-24 | A kind of Variable Stiffness Vibration Isolator based on multilayer dielectric elastomer film |
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| CN109268431A (en) * | 2018-11-05 | 2019-01-25 | 北汽福田汽车股份有限公司 | Damper and vehicle |
| CN109854672A (en) * | 2019-01-17 | 2019-06-07 | 上海大学 | A kind of low frequency vibration isolation device of double-diaphragm spring formula |
| CN110985581A (en) * | 2019-12-31 | 2020-04-10 | 北京机电工程研究所 | Repulsion type magnetic force negative stiffness honeycomb structure |
| CN111963602A (en) * | 2020-08-31 | 2020-11-20 | 合肥工业大学 | Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness |
| CN112780724A (en) * | 2020-12-31 | 2021-05-11 | 山东大学 | Rigidity-adjustable quasi-zero rigidity torsion vibration isolator and method |
| CN112942614A (en) * | 2021-03-03 | 2021-06-11 | 哈尔滨工业大学 | Active vibration isolation device of near-zero magnetic space combining fiber grating and dielectric elastomer |
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| CN110985581B (en) * | 2019-12-31 | 2021-06-18 | 北京机电工程研究所 | Repulsion type magnetic force negative stiffness honeycomb structure |
| CN111963602A (en) * | 2020-08-31 | 2020-11-20 | 合肥工业大学 | Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness |
| CN111963602B (en) * | 2020-08-31 | 2021-09-21 | 合肥工业大学 | Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness |
| CN112780724A (en) * | 2020-12-31 | 2021-05-11 | 山东大学 | Rigidity-adjustable quasi-zero rigidity torsion vibration isolator and method |
| CN112942614A (en) * | 2021-03-03 | 2021-06-11 | 哈尔滨工业大学 | Active vibration isolation device of near-zero magnetic space combining fiber grating and dielectric elastomer |
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