CN106402262A - Stiffness-adjustable magnetic vibration isolator with quasi zero stiffness - Google Patents
Stiffness-adjustable magnetic vibration isolator with quasi zero stiffness Download PDFInfo
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- CN106402262A CN106402262A CN201611039718.7A CN201611039718A CN106402262A CN 106402262 A CN106402262 A CN 106402262A CN 201611039718 A CN201611039718 A CN 201611039718A CN 106402262 A CN106402262 A CN 106402262A
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention belongs to the technical field of vibration and noise control and relates to a relatively-high-applicability passive isolation technology for ultralow-frequency vibration. In order to effectively solve the problem between the low-frequency vibration transmissibility and the high-frequency vibration attenuation rate of the vibration isolator, the invention provides the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness, which adopts rectangular permanent magnets generating negative stiffness and an elastic capsule providing positive stiffness; and when a load is changed, the working position of the elastic capsule is controlled unchanged, the positive stiffness of the elastic capsule is changed because the pressure inside the elastic capsule is changed, and then, the negative stiffness is matched with the positive stiffness through regulating the distance among the rectangular magnets, so that the stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is adaptable to vibration isolation objects with different weights. The stiffness-adjustable magnetic vibration isolator with quasi zero stiffness is simple in structure, convenient to mount, adjustable in bearing capacity, excellent in vibration isolation property, compact in structure, light in weight and suitable for popularization and application.
Description
Technical field
The invention belongs to vibration and noise control technology field, be related to a kind of superlow frequency vibrating with strong applicability passively every
From technology and in particular to a kind of rigidity adjustable magnetic quasi-zero stiffness vibration isolators.
Background technology
It is known that being m for a quality, rigidity is the linear vibrating isolation system of single-degree-of-freedom of k, the intrinsic frequency of system
ForOnly driving frequency is more thanWhen, system just has vibration isolating effect.Fixing for a vibration isolation object
Vibrating isolation system, in order to improve the vibration isolating effect of system, need to reduce system stiffness k, but the reduction of rigidity k can cause the quiet change of system
Deformation is greatly it is difficult to meet the stability requirement of system.For solving this technical problem, scholars propose have high Static stiffness and
The quasi-zero stiffness vibration isolators of low dynamic stiffness, so as to meet high bearing capacity and the requirement of low dynamic stiffness simultaneously, are meeting certain bar
In the case of part, low-frequency vibration can be effectively isolated.
Quasi-zero stiffness vibration isolators are the combined vibration isolators that a kind of positive rigidity is mated with negative stiffness, in equipoise
Necessarily in interval, there is less composite rigidity.On the one hand, if by the weight of vibration isolation object be not design ideal weight, that is, by
Vibration isolation object is placed on quasi-zero stiffness vibration isolators it is impossible to enough stablize on preferable equipoise, quasi-zero stiffness vibration isolators
Performance will be affected.For this problem, patent of invention CN104455181A, CN203641365U, CN202132428U and
CN102678804A, is all to make system reach equipoise by the decrement that adjusting set adjusts positive rigid spring, but, just
The precompressed amount regulated quantity of rigid spring is limited, when relatively large deviation is had by the ideal weight of vibration isolation weight of object and design, the party
The preferable effect of method difficult to reach.On the other hand, if a certain rigidity of vibration isolator changes, by adjusting precompressed amount, will very
Difficulty reaches preferably quasi- nought state.
Content of the invention
For solving the problems, such as above-mentioned prior art, the invention provides a kind of quasi- zero stiffness of the adjustable magnetic of rigidity every
Shake device, produces negative stiffness using rectangle permanent magnet, elastic bag provides a kind of adjustable quasi-zero stiffness vibration isolators of positive rigidity Design,
By controlling elastic bag operating position constant and negative stiffness that adjust negative stiffness magnetic governor motion makes it just firm with change
Degree matches, be suitable for Different Weight by vibration isolation object；It is simple that this has a structure, easy for installation, the features such as carry adjustable, and
Its vibration isolation initial frequency is low, and bearing capacity is high, can imitate the difficult problem solving between low-frequency vibration transport and dither attenuation rate,
It is applied to the vibration isolation field of automobile, ship, aircraft, precision instrument etc..
For achieving the above object, the technical solution used in the present invention is：
A kind of adjustable magnetic quasi-zero stiffness vibration isolators of rigidity, including load platform, negative stiffness magnetic governor motion, just firm
Degree elastic sack body and cabinet；Described load platform is arranged on above cabinet outside, and cabinet inside setting negative stiffness magnetic adjusts machine
Structure and positive rigidity elastic sack body；Wherein, the top of negative stiffness magnetic governor motion is passed cabinet top by guide rod and is put down with load
Platform is connected, and the bottom of negative stiffness magnetic governor motion is connected with the top of positive rigidity elastic sack body, positive rigidity elastic sack body
Bottom is connected with cabinet bottom；Described positive rigidity elastic sack body includes upper cover plate, lower cover and elastic bag, elastic bag
Connect with gas circuit position holding device, when the load change on load platform, elasticity is kept by gas circuit position holding device
The operating position of air bag is constant, makes vibration isolator stable on preferable equipoise；Described magnetic quasi-zero stiffness vibration isolators are whole
Individual device is along the central axis symmetrically structure of guide rod.Be placed on load platform by vibration isolation object, by vibration isolation object, guide rod,
Center magnet and elastic bag must assure that centering.
Described negative stiffness magnetic governor motion includes center magnet and is symmetricly set on the external magnet of center magnet both sides,
Described center magnet and external magnet are rectangular magnet, and the height of middle section keeps concordant；External magnet and lateral displacement
Adjusting means connects.
Described center magnet is clamped using top board and lower platen；Top board is connected with guide rod using the first bolt,
Guide rod is passed cabinet top and is connected with load platform；Lower platen is connected with the upper cover plate of positive rigidity elastic sack body using the second bolt
Fixing；Described lateral displacement adjusting means is fixed on the sidepiece of casing, and it includes U-shaped clamp and the 3rd bolt, the opening of U-shaped clamp
Mouth direction is relative with center magnet, and external magnet is fixed at the opening of U-shaped clamp；One end of 3rd bolt and U-shaped clamp side
The middle part in portion is fixed, and the other end passes the sidepiece of cabinet；The both sides that 3rd bolt passes the position of cabinet sidepiece arrange the first spiral shell
Mother and the second nut, the 3rd is bolted on side plate (realizing the connection of U-shaped clamp and side plate)；Described 3rd bolt passes
One end of casing sidepiece starts to open up keyway parallel to axial direction, is carried out even using key between the 3rd bolt and the sidepiece of cabinet
Connect, make to turn adjust the 3rd bolt the first nut adjust external magnet and center magnet spacing when, external magnet only occurs
Transverse shifting and do not rotate.
The fit middle part of center magnet side of described top board and lower platen opens up groove respectively, the first bolt and the second spiral shell
Bolt is separately fixed in the groove that top board and lower platen open up.
Described U-shaped clamp opens up groove near the middle part of external magnet sidepiece, and it is U-shaped that the 3rd bolt passes through U-shaped clamp to pass through
Clamp sidepiece is fixed in groove, and arranges the 3rd nut between U-shaped clamp and the second nut, will by adjusting the 3rd nut
U row clamp and the locking of the 3rd bolt.
Described top board and lower platen symmetrically open up chute along the first bolt both sides respectively, and top board and lower platen open up
Chute upper-lower position corresponds to；Pass through the both sides of the fixing center magnet of chute using the 4th bolt；The size of described 4th bolt with
The matching size of chute closes, can be along chute direction adjusting position and fixation, the fixation of achievable different size center magnet and more
Change.
The upper and lower ends of described U-shaped clamp open up screwed hole, are fixed on external magnet using upper and lower 5th bolt U-shaped
At the opening of clamp；Can ensure that external magnet is overlapped with the middle section of center magnet by adjusting the 5th bolt of upper and lower setting,
And enable the replacing of different size external magnet.
Described elastic bag can be selected for bellows type air spring or diaphragm type air spring etc..
Described gas circuit position holding device includes displacement transducer, controller, the source of the gas control for controlling source of the gas inflation/deflation
Unit processed, for elastic bag carried out with the inflation/deflation control unit of inflation/deflation, source of the gas, hub；Displacement transducer is arranged at
On the upper cover plate of positive rigidity elastic sack body；Described controller using hub respectively with displacement transducer, source of the gas control unit, fill
Venting control unit is connected；Described source of the gas, source of the gas control unit, inflation/deflation control unit and elastic bag are entered using gas circuit successively
Row connection；Controller according to receive displacement transducer transmitting upper cover plate displacement signal, control source of the gas control unit and
Inflation/deflation control unit is inflated to elastic bag or exits, the pressure in adjustment elastic bag, keeps the work of elastic bag
Make position constant.
Described lower cover opens up the pore leading to elastic bag and string holes respectively, and the exit of string holes is provided with hermetic seal and inserts
Seat.
Described cabinet top opens up centre bore, guide rod pass centre bore position setting sliding bearing, its size respectively with lead
Match in the aperture of bar external diameter and centre bore；Using the cooperation of sliding bearing and guide rod, limit the radial motion of guide rod, prevent
Stuck phenomenon occurs.
Described guide rod adopts the 6th bolt connection with load platform, and the 6th bolt bottom opens up keyway, adopts key with guide rod
Connect, prevent being rotated by the relatively described magnetic quasi-zero stiffness vibration isolators of vibration isolation object on load platform.
Described center magnet and external magnet transversely magnetize, and magnetizing direction is identical；Using Nd-Fe-B rare-earth permanent magnet iron
Material.Except center magnet, external magnet, elastic sack body and by vibration isolation object in addition to, remaining part is all using non-magnetic or weak magnetic conduction
Metal material.Metal material preferably 304 stainless steel of described non-magnetic or weak magnetic conduction.
The negative stiffness know-why of the adjustable magnetic quasi-zero stiffness vibration isolators of rigidity of the present invention is as follows：
Theoretical according to Equivalent Magnetic Charge, the magnetic force between two blocks of magnet is interacted by the left and right end face of left and right magnet and produces,
Two pieces of parallel magnetostatic energies of magnetizing direction are：
Wherein：The size of left and right magnet is respectively 2a × 2b × 2c and 2a ' × 2b ' × 2c ', and dielectric polorization intensity is respectively
For J and J ', place coordinate system respectively O-XYZ and O '-X ' Y ' Z ', the coordinate of O ' is (x, y, z).Uij=x+ (- 1)ja′-(-1
)iA, Vlk=y+ (- 1)kb′-(-1)lB, Wpq=z+ (- 1)qc′-(-1)pC,Can after quad-slope integration
?：
Wherein
The magnetic force between two magnet can be obtained according to the principle of virtual work is：
When two pieces of magnet magnetizing directions are identical, F just takes, on the contrary then F take negative, omit multiple be summed to zero item：
To formula (4) respectively in different directions derivation, and omit multiple be summed to zero item, the negative stiffness between two magnet can be obtained
For：
When by the real load of vibration isolation object different from design load when, by control elastic bag operating position constant simultaneously
The negative stiffness adjusting negative stiffness magnetic governor motion makes it with positive Rigidity Matching, be suitable for Different Weight by vibration isolation object.
Compared with prior art, beneficial effects of the present invention are the present invention：
1) present invention adopts elastic bag as positive stiffness reliability structure, and its bearing capacity is strong, and when the load,
Its operating point is constant it is ensured that quasi-zero stiffness vibration isolators can be stablized on preferable equipoise.
2) negative rigidity mechanism of the present invention adopts three pieces of rectangular magnet, mechanical abrasion, need not lubricate, life-span length, and just
Degree easily dimmable, nonlinear degree is little, can preferably with positive Rigidity Matching.
3) present invention is integrated with rectangle permanent magnet (magnet) by air spring (elastic bag), combines air spring high frequency
Vibration isolation and the advantage of permanent magnet low frequency spectrum lines vibration isolation, have relatively low vibration isolation initial frequency and larger vibration attenuation rate.
4) the magnet clamping device of the present invention can achieve the replacing of different size magnet, increases the regulation model of negative stiffness
Enclose, improve the scope of application of system.
5) present invention except center magnet, external magnet, elastic sack body and by vibration isolation object in addition to, remaining part is not all using leading
Magnetic or the metal material of weak magnetic conduction, it is to avoid the magnetic field that permanent magnet is produced interferes, during system work, can be in metal parts
Produce vortex flow, the damping characteristic of system can be improved.
6), when the present invention can overcome existing quasi-zero stiffness vibration isolators to align rigidity and be adjusted, align the precompressed of rigid components
Amount restricted problem, by controlling, the operating position of elastic bag is constant and negative stiffness that adjust negative stiffness magnetic governor motion makes it
With positive Rigidity Matching, be suitable for Different Weight by vibration isolation object.
7) present invention have the advantages that compact conformation, be convenient to mount and dismount, reliability height, less energy consumption, adaptability good, to larger amplitude
The object of the excitation of value and Different Weight is respectively provided with preferable vibration isolating effect, vibration isolation bandwidth, and amplitude attenuation rate is big.
Brief description
Fig. 1 is the sectional view of the quasi-zero stiffness vibration isolators of one embodiment of the invention.
Fig. 2 is the clamping installation diagram of external magnet.
Fig. 3 is the clamping installation diagram of center magnet.
Fig. 4 is the hardware catenation principle schematic diagram of gas circuit position holding device.
Fig. 5 is the negative stiffness curve of negative stiffness magnetic governor motion under different magnet pitch.
Fig. 6 is the rigidity-displacement curve of quasi-zero stiffness vibration isolators.
Wherein：1- load platform, 2- cabinet end cap, 3- cabinet side board, 4- chassis base, 5- center magnet, the outside magnetic of 6-
Iron, 7- top board, 8- lower platen, 9- first bolt, 10- guide rod, 11- sliding bearing, 12- second bolt, 13- chute, 14-
Four bolts, 15-U type clamp, 16- the 3rd bolt, 17- key, 18- first nut, 19- the 3rd nut, 20- second nut, 21-
Five bolts, 22- elastic bag, 23- upper cover plate, 24- lower cover, 25- boss, 26- pore, 27- string holes, 28- gas-tight seal socket,
29- the 6th bolt, 30- square washer, by vibration isolation object, 32- controller, 33- displacement transducer, 34- inflation/deflation controls single 31-
Unit, 35- source of the gas control unit source of the gas, 36- source of the gas, 37- hub, 38- cable, 39- gas circuit.
Specific embodiment
Below in conjunction with the accompanying drawings and be embodied as the present invention is described in further detail it is therefore an objective to help the technology of this area
Personnel have more complete, accurate and deep understanding to the design of the present invention, technical scheme, and contribute to implementing.
As shown in Figure 1, 2, 3, the adjustable magnetic quasi-zero stiffness vibration isolators of a kind of rigidity, it includes load platform 1, negative stiffness
Magnetic governor motion, positive rigidity elastic sack body and cabinet；Described cabinet includes cabinet end cap 2, cabinet side board 3 and machine from top to bottom
Bottom seat 4；Described load platform 1 is arranged on the top outside cabinet, cabinet inside setting negative stiffness magnetic governor motion and just
Rigidity elastic sack body；Wherein, the top of negative stiffness magnetic governor motion using guide rod 10 pass cabinet end cap 2 (cabinet top) with
Load platform 1 is connected, and the bottom of negative stiffness magnetic governor motion is connected with the top of positive rigidity elastic sack body, positive rigidity elasticity
The bottom of utricule is connected with chassis base 4 (cabinet bottom)；Described positive rigidity elastic sack body includes upper cover plate 23, lower cover
24 and elastic bag 22 (diaphragm type air spring), lower cover 24 opens up the pore 26 leading to elastic bag and string holes 27 respectively,
The exit of pore 26 is provided with gas-tight seal socket 28, and elastic bag 22 adopts pore 26 and string holes 27 and gas circuit position holding device
Realization is tightly connected and connects, and the operating position of elastic bag 22 keeps constant when the load, and described vibration isolator can be made steady
It is scheduled on preferable equipoise；Described magnetic quasi-zero stiffness vibration isolators whole device is symmetrically tied along the central axis of guide rod
Structure.
Described negative stiffness governor motion includes center magnet 5 and the external magnet 6 being symmetricly set on center magnet both sides, institute
State center magnet 5 and external magnet 6 is rectangular magnet；Wherein, center magnet 5 is pressed from both sides using top board 7 and lower platen 8
Hold, the middle part of described top board 7 and lower platen 8 laminating center magnet side opens up groove respectively；One end of first bolt 9 is fixed
In the groove of top board 7, the other end is connected with guide rod 10；Cabinet end cap 2 arranges centre bore, and guide rod 10 passes and is arranged on
The sliding bearing 11 of centre bore and load platform 1 are connected using the 6th bolt 29；Under one end of second bolt 12 is fixed on
In the groove of pressing plate 8, the other end is connected with the upper cover plate 23 of positive rigidity elastic sack body；Described top board 7 and 8 points of lower platen
Symmetrically do not open up chute 13 along the both sides of the first bolt 9, top board 7 is corresponding with chute 13 upper-lower position that lower platen 8 opens up；Adopt
Chute 13 is passed through symmetrically to fix the both sides of center magnet 5 with 4 group of the 4th bolt 14；The size of described 4th bolt 14 and chute 13
Matching size close, and can be along chute 13 direction adjusting position and fixation, the fixation of achievable different size center magnet 5 and more
Change；External magnet 6 is respectively adopted U-shaped clamp 15 and is fixed on cabinet side board 3 by the 3rd bolt 16, the opening of U-shaped clamp 15
Direction is relative with center magnet 5, and external magnet 6 is fixed at the opening of U-shaped clamp 15；Described U-shaped clamp 15 is near outside magnetic
The middle part of iron 6 sidepiece opens up groove, and one end of the 3rd bolt 16 is fixed in the groove of U-shaped clamp 15, and the other end passes cabinet
Side plate 3；The both sides that 3rd bolt 16 passes the position of cabinet side board 3 arrange the first nut 18 and the second nut 20, by the 3rd spiral shell
Bolt 16 is fixed on cabinet side board 3, and external magnet 6 passes through regulation the 3rd bolt 16 and makes its center magnet 5 relatively along level side
To distance adjustable, by changing negative stiffness size so as to realize accurate zero with the positive Rigidity Matching of positive rigidity elastic sack body；Described
One end that 3rd bolt 16 passes cabinet side board 3 starts to open up keyway parallel to axial direction, the 3rd bolt 16 and cabinet side board 3
Between (at contact surface) be attached with key 17, adjust center magnet 5 and outer by turning the first nut 18 and the second nut 20
During the spacing of portion's magnet 6, external magnet 6 is made to occur transverse shifting not rotate；Described 3rd bolt 16 is in U-shaped clamp
15 and second arrange the 3rd nut 19 between nut 20, and U-shaped clamp 15 and the 3rd bolt 16 are clamped；U-shaped clamp is two about 15
End opens up screwed hole, using upper and lower 5th bolt 21, external magnet 6 is fixed at the opening of U-shaped clamp 15；By adjusting
Upper and lower 5th bolt 21 can ensure that external magnet 6 and the middle section of center magnet 5 overlap, and enables the outside magnetic of different size
The replacing of iron 6.
Described gas circuit position holding device by displacement transducer 33, source of the gas 36, controller 32, source of the gas control unit 35, fill
Venting control unit 34, hub 37, cable 38 and gas circuit 39 form (schematic diagram is shown in Fig. 4)；Displacement transducer 33 is arranged on
On cover plate 23；Described controller 32 is connected with hub 37 by cable 38, hub 37 respectively with displacement transducer 33, source of the gas
Control unit 35, inflation/deflation control unit 34 are connected, displacement transducer 33, inflation/deflation control unit 34, source of the gas control unit 35
Signal pass through cable 38 and hub 37, controller 32 and mutually transmit；Inflation/deflation control unit 34 pass through gas circuit 39 respectively with
Source of the gas control unit 35 and elastic bag 22 connect, and the gas in source of the gas 36 is connected with source of the gas control unit 35 through gas circuit 39；Logical
Cross controller 32 and the signal of displacement transducer 33 is analyzed process and control source of the gas control unit 35 and inflation/deflation control unit
Pressure in 34 adjustment elastic bags, keeps the operating position of elastic bag 22 constant.
Described 6th bolt 29 bottom opens up keyway, with guide rod 10 adopt bonded, prevent on load platform by vibration isolation
The relatively described magnetic quasi-zero stiffness vibration isolators of object rotate.
3 groups of square washers 30 are also set up, for fixing and protecting center magnet 5 on described 4th bolt 14.
Described upper cover plate 23 is connected with the second bolt 12, and lower cover 24 is fixed on chassis base 4；Chassis base 4 is arranged
Boss 25, is matched with the breach of lower cover 24 setting.
Described external magnet and center magnet are constituted by the big NdFeB material of residual magnetization, except external magnet, centre
Magnet, elastic sack body and by vibration isolation object outside, remaining part is all using 304 stainless steels.Described center magnet and external magnet edge
Laterally magnetize, and magnetizing direction is identical, be in state of repelling each other between center magnet and external magnet.
Described higher centering be must assure that by vibration isolation object, guide rod, middle magnetic patch and air bag vibration isolator.
The operation principle of the present invention is as follows：When being changed by vibration isolation object 31 mass, positive rigidity elastic sack body 34
Operating position keeps constant, and leads to itself positive stiffness change because internal pressure changes, and the present invention adopts three pieces of rectangles
Magnet (center magnet and external magnet) provide negative stiffness (the negative stiffness curve of negative stiffness governor motion is shown in Fig. 5) make its with just firm
Degree coupling, described vibrating isolation system rigidity near equilbrium position realizes accurate zero (see Fig. 6).When vibrating isolation system is in static, by
In the symmetrical structure of setting, external magnet is zero to the axial force of center magnet, therefore magnet spring (positive rigidity elastic sack body)
Do not interfere with the bearing capacity of vibration isolator, and non-magnetic metal can produce vortex flow in magnetic field, can improve the resistance of the present invention
Damping characteristics.
To sum up, quasi-zero stiffness vibration isolators of the present invention have high quiet low dynamic characteristic, can be before ensureing bearing capacity
Put and make resonant frequency very low, thus widening vibration isolation frequency band, improving vibration isolating effect.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.Below only
For presently preferred embodiments of the present invention, not for limiting protection scope of the present invention.All in the spirit and principles in the present invention
Within, any modification of being made, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of adjustable magnetic quasi-zero stiffness vibration isolators of rigidity are it is characterised in that include load platform, negative stiffness magnetic is adjusted
Mechanism, positive rigidity elastic sack body and cabinet；Described load platform is arranged on above cabinet outside, and cabinet inside arranges negative stiffness magnetic
Property governor motion and positive rigidity elastic sack body；Wherein, the top of negative stiffness magnetic governor motion passes cabinet top by guide rod
It is connected with load platform, the bottom of negative stiffness magnetic governor motion is connected with the top of positive rigidity elastic sack body, positive rigidity bullet
The bottom of property utricule is connected with cabinet bottom；Described positive rigidity elastic sack body includes upper cover plate, lower cover and elastic bag,
Elastic bag is connected with gas circuit position holding device；Described magnetic quasi-zero stiffness vibration isolators whole device is along the central axis of guide rod
Symmetrically structure.
2. magnetic quasi-zero stiffness vibration isolators according to claim 1 are it is characterised in that described negative stiffness magnetic governor motion
Including center magnet and the external magnet being symmetricly set on center magnet both sides, described center magnet and external magnet are rectangle
Magnet, and the height of middle section keeps concordant；External magnet is connected with lateral displacement adjusting means.
3. magnetic quasi-zero stiffness vibration isolators according to claim 2 are it is characterised in that described center magnet adopts top board
Clamped with lower platen；Top board is connected with guide rod using the first bolt, and guide rod is passed cabinet top and is connected with load platform；
Lower platen is connected using the upper cover plate of the second bolt and positive rigidity elastic sack body；Described lateral displacement adjusting means is fixed on
The sidepiece of casing, it includes U-shaped clamp and the 3rd bolt, and the opening direction of U-shaped clamp is relative with center magnet, and external magnet presss from both sides
Hold at the opening of U-shaped clamp；The middle part of one end of the 3rd bolt and U-shaped clamp sidepiece is fixed, and the other end passes the side of cabinet
Portion；Cabinet sidepiece both sides arrange the first nut and the second nut is bolted to the 3rd on side plate；Described 3rd bolt passes
One end of casing sidepiece starts to open up keyway parallel to axial direction, is carried out even using key between the 3rd bolt and the sidepiece of cabinet
Connect.
4. magnetic quasi-zero stiffness vibration isolators according to claim 3 are it is characterised in that described top board and lower platen are distinguished
Both sides along the first bolt symmetrically open up chute, and top board is corresponding with the chute upper-lower position that lower platen opens up；Using the 4th spiral shell
Bolt passes through the both sides of the fixing center magnet of chute；Described 4th bolt is adjustable along the position in chute direction.
5. magnetic quasi-zero stiffness vibration isolators according to claim 3 are it is characterised in that the upper and lower ends of described U-shaped clamp
Open up screwed hole, external magnet is clamped at the opening of U-shaped clamp the 5th bolt using upper and lower setting.
6. magnetic quasi-zero stiffness vibration isolators according to claim 3 are it is characterised in that described external magnet and center magnet
Transversely magnetize, and magnetizing direction is identical.
7. magnetic quasi-zero stiffness vibration isolators according to claim 1 are it is characterised in that described gas circuit position holding device bag
Include displacement transducer, controller, source of the gas control unit, inflation/deflation control unit, source of the gas and hub, displacement transducer is arranged at
On the upper cover plate of positive rigidity elastic sack body；Described controller is connected with hub, hub respectively with displacement transducer, source of the gas control
Unit processed, inflation/deflation control unit are connected；Described source of the gas, source of the gas control unit, inflation/deflation control unit and elastic bag are successively
Connected using gas circuit；Controller is processed and is controlled source of the gas control unit and charge and discharge gas control to the signal of displacement transducer
Unit processed is inflated to elastic bag or exits, the pressure in adjustment elastic bag, keeps the operating position of elastic bag not
Become.
8. magnetic quasi-zero stiffness vibration isolators according to claim 1 are it is characterised in that described lower cover opens up respectively and leads to
The pore of elastic bag and string holes, the exit of string holes is provided with gas-tight seal socket.
9. magnetic quasi-zero stiffness vibration isolators according to claim 1 are it is characterised in that described cabinet top opens up center
Hole, guide rod passes centre bore position setting sliding bearing, and its size is matched with the aperture of guide rod external diameter and centre bore respectively.
10. magnetic quasi-zero stiffness vibration isolators according to claim 1 are it is characterised in that described guide rod and load platform are adopted
With the 6th bolt connection, the 6th bolt bottom opens up keyway.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611039718.7A CN106402262B (en) | 2016-11-11 | 2016-11-11 | A kind of adjustable magnetic quasi-zero stiffness vibration isolators of rigidity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039718.7A CN106402262B (en) | 2016-11-11 | 2016-11-11 | A kind of adjustable magnetic quasi-zero stiffness vibration isolators of rigidity |
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| CN106402262B CN106402262B (en) | 2017-10-27 |
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| CN107135749A (en) * | 2017-04-26 | 2017-09-08 | 江苏大学 | A kind of quasi- zero stiffness multiple girder construction of control longitudinally axial flow threshing roller low-frequency vibration |
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| CN106870625A (en) * | 2017-02-16 | 2017-06-20 | 湖南大学 | A kind of quasi-zero stiffness vibration isolators and the ewborn infant transfer car(buggy) with low frequency vibration isolation function |
| CN106870625B (en) * | 2017-02-16 | 2020-05-12 | 湖南大学 | Quasi-zero stiffness vibration isolator and newborn baby transfer trolley with low-frequency vibration isolation function |
| CN107135749B (en) * | 2017-04-26 | 2019-06-28 | 江苏大学 | It is a kind of control the low-frequency vibration of longitudinally axial flow threshing roller quasi- zero stiffness answer girder construction |
| CN107135749A (en) * | 2017-04-26 | 2017-09-08 | 江苏大学 | A kind of quasi- zero stiffness multiple girder construction of control longitudinally axial flow threshing roller low-frequency vibration |
| CN107654552A (en) * | 2017-08-31 | 2018-02-02 | 哈尔滨工程大学 | A kind of quasi-zero stiffness vibration isolators that centering regulation is carried out using piezoelectric patches |
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| CN108302155A (en) * | 2017-12-08 | 2018-07-20 | 沈阳远大装备科技有限公司 | Group's tune method of quasi- zero stiffness isolation mounting and the isolation mounting and system |
| CN108131411A (en) * | 2017-12-29 | 2018-06-08 | 浙江理工大学 | A kind of sensing Nonlinear Quasi zero stiffness electromagnetism vibration isolator certainly |
| CN108131411B (en) * | 2017-12-29 | 2019-06-28 | 浙江理工大学 | A kind of sensing Nonlinear Quasi zero stiffness electromagnetism vibration isolator certainly |
| CN108167362A (en) * | 2018-01-03 | 2018-06-15 | 上海大学 | It is a kind of using multi-electrode Squeeze Mode magnetic spring and the quasi-zero stiffness vibration isolators of swing rod |
| CN109367728A (en) * | 2018-10-23 | 2019-02-22 | 李元芳 | A kind of ship stabilizing device |
| CN109367728B (en) * | 2018-10-23 | 2019-10-25 | 泉州市言磊工业设计有限公司 | A kind of ship stabilizing device |
| CN109268443A (en) * | 2018-10-31 | 2019-01-25 | 株洲时代新材料科技股份有限公司 | The quasi- positive stiffness equivalent method of zero stiffness and quasi- zero stiffness method of adjustment and vibration isolator |
| CN109780124A (en) * | 2019-01-18 | 2019-05-21 | 华东交通大学 | A kind of negative stiffness vibration absorber of parallel connection Frequency Adjustable |
| CN110043600A (en) * | 2019-03-25 | 2019-07-23 | 江苏大学 | A kind of quasi-zero stiffness vibration isolators and vehicle based on magnetic pull component |
| CN110259864A (en) * | 2019-06-28 | 2019-09-20 | 北京无线电测量研究所 | A kind of decoupling isolation mounting |
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| CN110617295A (en) * | 2019-09-26 | 2019-12-27 | 湖南铁路科技职业技术学院 | Air spring system vibration reduction method capable of achieving air leakage quasi-zero stiffness and spring system |
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| CN114151507B (en) * | 2021-12-10 | 2023-07-25 | 中国人民解放军海军工程大学 | Quasi-zero stiffness vibration isolator with adjustable electromagnetic negative stiffness and vertical eddy current damping |
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| CN114590283A (en) * | 2022-01-26 | 2022-06-07 | 中车齐齐哈尔车辆有限公司 | Position adjusting device, quasi-zero rigidity vibration damping system and bogie of railway vehicle |
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