CN101334081A - Semi- initiative vibration isolation buffering device - Google Patents
Semi- initiative vibration isolation buffering device Download PDFInfo
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- CN101334081A CN101334081A CNA2007101181894A CN200710118189A CN101334081A CN 101334081 A CN101334081 A CN 101334081A CN A2007101181894 A CNA2007101181894 A CN A2007101181894A CN 200710118189 A CN200710118189 A CN 200710118189A CN 101334081 A CN101334081 A CN 101334081A
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Abstract
The invention discloses a semi-active vibration isolating and cushioning device, which comprises first and second cavities (111 and 161) connected with a fluid passage (132), and a first and a second magnetic field components (140 and 130), a magneto rheological fluid (MR) is contained in the first cavity (111), the first and the second magnetic field components (140 and 130) are oppositely arranged at an interval of the magneto rheological fluid (MR), wherein, at least the sidewall of the first cavity (111) is formed by a telescopic elastic component (110) along the load exerting direction; the first magnetic field component (140) is connected to the lower end of the sidewall of the first cavity (111), and the second magnetic field component (130) is connected to the upper end of the sidewall of the first cavity (111). The invention also provides a semi-actively vibration isolating and cushioning device utilizing an electro rheological fluid as a working medium. Except that the damping is changeable, the semi-active vibration isolating and cushioning device can show the soft property during a light load and the hard property during a heavy load, therefore to provide the integrative dynamic vibration damping performance suitable for small electronic products.
Description
Technical field
The present invention relates to antivibration area, be specifically related to a kind of utilize magnetic flow liquid or electrorheological fluid that is particularly useful for electronic product and realize the semi-initiative vibration isolation buffering device of vibration damping.
Background technique
Traditional vibration reducing measure comprises passive type vibration damping and active vibration damping.So-called passive type vibration damping is meant is needing that simple vibration damper is installed on the equipment of vibration damping, and the characteristic parameter of this vibration damper is immutable, thereby its bad adaptability.So-called active vibration damping then is by setting up a feedback mechanism, when the mechanism's operation conditions that needs vibration damping changes, the sensor of feedback mechanism feeds back to control system with change information, control system passes to vibration damper with processing instruction after handling again, makes vibration damper produce corresponding damping.Though active vibration damping has certain adaptability, its control algorithm complexity, and have the problem of feedback delay.
Along with the development of damping technology, new vibration damping means constantly occur, and wherein utilize magnetic flow liquid or electrorheological fluid to realize that the device of vibration reduction and cushioning has obtained development faster.
Magnetic flow liquid (MR, magneto-rheological fluid) is a kind of special liquid that contains magnetic particle, is made of base fluid, the magnetic-particle and the stabilizer that are suspended in the base fluid.At microscopically, the distribution of magnetic-particle under zero magnetic field and strong magnetic field action is inequality in the magnetic flow liquid.Under zero magnetic field, the magnetic-particle distribution is mixed and disorderly in the magnetic flow liquid, and under strong magnetic field action, but arranges along magnetic direction chaining or chain pencil regularly.About explaining the most intuitively of magnetic rheology effect is that strong magnetic field action makes magnetic-particle form chain pencil structure between two-plate, between pole plate, has hindered the proper flow of fluid as the bridge crossbearer.And when high magnetic fields was more weak, chain quantity was few, length is short, diameter is thin, and it is less to cut off required external force, and corresponding magnetic flow liquid shear yield strength is low; Along with the continuous increase of external magnetic field, chain bundle quantity increases in the magnetic flow liquid, length extends, the diameter chap, and shearing external force also increases, and corresponding magnetic flow liquid viscosity and damping also improve.If magnetic field changes according to certain rules, magnetic flow liquid viscosity and damping also change (Millisecond) fast with rule.
Electrorheological fluid (ER, electrorheological fluid) is a kind of intellectual material that is similar to magnetic flow liquid, the uniform particles with high-k by micron (nanometer) yardstick is dispersed in the oil-phase medium of insulation low-k, form suspension, when applying external electric field, the ER fluid transfers the class solid state to from flowing state, its apparent viscosity surge several magnitude, and to reach this process of higher shear stress be reversible, controlled, fast and low power consumption, can be used for effectively solving the protection question of mechanical shock.
China's utility model patent 200520021463.2 discloses a kind of anti-impact vibration damping equipment based on magnetic converting technique, structure includes side column, suspension structure, wire rope damper, MR damper, force transducer, the ball hinge, acceleration transducer, velocity transducer, computer controlled system, power supply etc.This scheme to magnetorheological magnetorheological damping carries out the intelligence adjusting by the control system that comprises computer, is mainly used in the large-scale anti-impact vibration damping Structural Hardware on naval vessel.
China's utility model patent 200420037740.4 discloses a kind of magnetorheological intelligent damping wall, and it is mainly by magnetic flow liquid, body of wall, slide plate, rigidity kerve, upper and lower mounting plate, field winding, computer, formations such as power supply.This scheme is adjusted the kinetic parameter of damping body of wall by being added in control voltage on the field coil, and size is relevant with the physical dimension of building, and size is bigger.
Chinese invention patent application 03141795.7 discloses a kind of magnetic flow liquid vibration damping braking system, and it comprises brake switch, variable resistor, ammeter, magnetic flow liquid, cylinder barrel, piston, piston rod, field coil, control circuit, power supply etc.This technological scheme is by regulating the intensity of variable resistor control brake device and damper electromagnetic field, changes the damping torque that break and damper provide and the size of damping force with this, reaches the effect of synchronous vibration damping braking.
At present applied current becomes the patent of " damped system " of liquid in the world, and is existing by power source special and control circuit, also has pressured electroceramic to provide voltage-controlled.
China's utility model patent 02294319.6 discloses a kind of electrorheological fluid adjustable shock absorber, form by vibration damper and electrorheological fluid retardance valve, control the voltage difference that is added on the electrorheological fluid by control circuit, change the flowability of electrorheological fluid with this, thereby the complexity of the piston motion in the retardance valve is regulated in influence, regulates the Resistance Value of vibration damper.This technological scheme is mainly used in the vehicle suspension field.
China's utility model patent 96236145.3 discloses a kind of electrorheological fluid and the compound self-adaptive damper of piezoelectric constant, and it separates piston cavity and piezoelectric ceramic via seal diaphragm in cylindrical tube.Piston and spring mechanism act on piezo ceramic element, respond extraneous vibration and produce a voltage, this voltage output is received on the concentric circle annulated column electrode that is fixed on the piston rod, by electrode the electrorheological fluid in the piston cavity is solidified, increase damping force, thereby reduce the vibration of piston.
These prior aries have proved that it is fully possible that magnetic flow liquid and electrorheological fluid are used for vibration insulating system.But the following shortcoming of prior art ubiquity has hindered such as the application in the mini-plants such as electronic product:
1. existing magnetic flow liquid or electrorheological fluid vibration insulating system must have reciprocating members such as metal cylinder body, piston, piston motion needs stroke, therefore these vibration insulating system profiles mostly are the large-scale rectangular bin, heavy, be suitable for fields such as building, naval vessel, heavy load truck, can't be used for small-sized electronic product because size is big, as require frivolous notebook computer.
2. metal cylinder body, reciprocating motion of the pistons part requirement have higher processing precision and quality of fit, cause the manufacture cost of existing magnetic flow liquid or electrorheological fluid vibration insulating system higher.
3. existing magnetic flow liquid vibration insulating system needs power supply to produce magnetic field, comes controlling magnetic field intensity by changing size of current, thus the damping characteristic of control magnetic flow liquid, and circuit control is complicated.
4. existing magnetic flow liquid or electrorheological fluid vibration insulating system rely on " damping " characteristic of magnetic flow liquid or electrorheological fluid to carry out vibration damping merely, are easy to control though can obtain bigger damping and damping, have one-sidedness.It is more excellent to isolating the heavy load effect, but does not have comprehensive frequency characteristic and the anti-vibration and shock ability that small-sized electronic product needs.
For small-sized electronic product, except damping is variable, also need when little load, show software feature, performance hardware features during big load.This comprehensive dynamic damping capacity is the required ideal state of design vibration damper.
Summary of the invention
The object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that can solve at least a defective of the prior art.
One object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes magnetic flow liquid, and it does not need power supply to produce magnetic field.
Another object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes magnetic flow liquid, and it does not need to come controlling magnetic field intensity by size of current.
Another object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes magnetic flow liquid, and it does not need to adopt moving elements such as cylinder body and piston, to reduce size and to reduce cost.
Another object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes magnetic flow liquid, and it can provide comprehensive dynamic antivibration damping behavior.
Another object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes electrorheological fluid, and it does not need to adopt moving elements such as cylinder body and piston, to reduce size and to reduce cost.
Another object of the present invention is to provide a kind of semi-initiative vibration isolation buffering device that utilizes electrorheological fluid, and it can provide comprehensive dynamic antivibration damping behavior.
For solving the problems of the technologies described above, according to an aspect of the present invention, a kind of semi-initiative vibration isolation buffering device is provided, comprise first cavity and second cavity, and first magnetic field components and second magnetic field components that are used to form magnetic field, has the fluid passage between wherein said first cavity and described second cavity, accommodate magnetic flow liquid in described first cavity, described first magnetic field components and described second magnetic field components are oppositely arranged across described magnetic flow liquid, it is characterized in that the sidewall at least of described first cavity constitutes by applying the telescopic elastic member of direction along load; Described first magnetic field components directly or indirectly is connected to the lower end of the sidewall of described first cavity, and described second magnetic field components directly or indirectly is connected to the upper end of the sidewall of described first cavity.
Wherein, described first cavity and described second cavity are separated by spacer member, and described fluid passage is formed on the described spacer member.Described first cavity is limited by described elastic member, the base plate that is connected to the described spacer member of described elastic member upper end and is connected to described elastic member lower end and forms.Top cover on described spacer member limits and forms described second cavity by a described spacer member and a cover cap.
Wherein, be permanent magnet one of at least in described first magnetic field components and described second magnetic field components.Preferably, described first magnetic field components is a permanent magnet, and described second magnetic field components is made of described spacer member, is soft magnetic bodies.
Wherein, described spacer member comprises the soft magnet plate cover and is arranged on the soft magnetism center plate at described soft magnet plate cover middle part that the gap between described soft magnet plate cover and the described soft magnetism center plate forms described fluid passage, and constitutes magnetic gap simultaneously.Preferably, described soft magnetism center plate is connected on the described soft magnet plate cover by the support that non-magnet material constitutes,
Wherein, described elastic member is made by viscoelastic material or elastic metallic film.Preferably, described elastic member is a ripple sylphon.
Wherein, the bottom of described first cavity holds described magnetic flow liquid, and top accommodates air, forms air column.Preferably, also comprise the air pressure modulating valve, be connected with the air of described second cavity or described first cavity.
According to another aspect of the present invention, a kind of semi-initiative vibration isolation buffering device is provided, it is characterized in that, comprise first cavity and second cavity, and the first electric field parts and the second electric field parts that are used to form electric field, has the fluid passage between wherein said first cavity and described second cavity, accommodate electrorheological fluid in described first cavity, described first electric field parts and the described second electric field parts are oppositely arranged across described electrorheological fluid, and the sidewall at least of described first cavity constitutes by applying the telescopic elastic member of direction along load; The described first electric field parts directly or indirectly are connected to the lower end of the sidewall of described first cavity, and the described second electric field parts directly or indirectly are connected to the upper end of the sidewall of described first cavity.
Wherein, described first cavity and described second cavity are separated by spacer member, and described fluid passage is formed on the described spacer member.Described elastic member has diapire, and described first cavity is limited with the described spacer member that is connected to described elastic member upper end by described elastic member and forms.Top cover on described spacer member limits and forms described second cavity by a described spacer member and a cover cap.
Wherein, the described first electric field parts are piezo ceramic element, are arranged on the described first cavity inside bottom, the described second electric field parts are described spacer member, be made of metal, constitute an electrode plate, described piezo ceramic element is electrically connected with described spacer member by lead.
Wherein, described spacer member middle part is provided with insulator, and the lower end of described insulator contacts with described piezo ceramic element.Described insulator is slidably disposed in the hole at described spacer member middle part, and is arranged with spring, described spring with described insulator towards described piezo ceramic element bias voltage.Preferably, described spacer member comprises elastic thin-wall, and described insulator is installed on the described elastic thin-wall.Further preferably, described elastic thin-wall is the ripple membranous wall.
Wherein, described elastic member is made by viscoelastic material.
Wherein, the bottom of described first cavity holds described electrorheological fluid.The top of described first cavity accommodates air, forms air column.
For realizing comprehensive dynamic capability, the present invention combines elastic material with vibration damping equipment based on electricity, magnetic flow liquid, utilizes the performance of traditional elastic to remedy deficiency based on the vibration damping equipment of electricity, magnetic flow liquid.
The present invention has following technique effect:
1. structure miniaturization.The present invention utilizes elastic material (comprising viscoelastic material or elastic film metal), in conjunction with permanent-magnetic field and magnetic rheological liquid, perhaps in conjunction with electric field and current liquid, constitutes the variable semi-initiative vibration isolation buffering device of a kind of damping.For example main body can adopt the ripple sylphon cavity that a traditional viscoelastic material or elastic metallic film are made, electrorheological fluid in this way, use the insulation viscoelastic material, in fact be exactly a spring, its hollow, be a cavity, there is one section air column inside, holds concurrently to storing a small amount of several approximately main chamber that restrains tens gram operation materials (electric or magnetic rheology liquid).This device no longer needs back and forth operation parts such as metal cylinder body and piston, and spring and cavity are combined as a whole, and structure is multiplexing, helps the structure miniaturization.Can reduce size effectively, thereby go for small-sized electronic products such as notebook computer.
2. reduce cost.Owing to do not need metal cylinder body, reciprocating motion of the pistons parts, thereby machining accuracy and quality of fit reduced, thereby can reduce production costs.
3. comprehensive dynamic damping capacity.The present invention utilizes elastic material (comprising viscoelastic material or elastic film metal), in conjunction with permanent-magnetic field and magnetic rheological liquid, perhaps in conjunction with electric field and current liquid, constitutes the variable semi-active vibration-isolating buffer system of a kind of damping.Like this, by having complementary advantages, compatible little load and heavy load have solved the difficulty that one section air column+magnetic flow liquid combination is arranged in viscoelastic material+cavity, have synthesized to have the variable and excellent comprehensive frequency characteristic of damping.Because viscoelastic material and the complementation of magnetic flow liquid advantage,, present hardware features during strong load, thereby can optimize energy consumption and absorption so when little load, present software feature.And, the dynamic characteristic excellence, speed of response is fast.
4. wide temperature characteristics.Because magnetic flow liquid has wide temperature characteristics, thereby has outstanding wide temperature characteristics based on the semi-initiative vibration isolation buffering device of magnetic flow liquid.For example ,-30 ℃～80 ℃ characteristics that can both guarantee half active isolation buffering.
5. non-transformer and control circuit: adopt ingenious structure to realize half initiatively, cancelled power supply of the prior art and control circuit, this has reduced structure again and has reduced cost, and functional reliability is provided.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing constitutes the part of this specification, is used to help further understand the present invention.These accompanying drawings illustrate some embodiments of the present invention, and are used for illustrating principle of the present invention with specification.Identical in the accompanying drawings parts are represented with identical label.Wherein:
Figure 1 shows that the perspective view of utilizing the semi-initiative vibration isolation buffering device of magnetic flow liquid according to of the present invention;
Figure 2 shows that the three-dimensional decomposition texture schematic representation of the semi-initiative vibration isolation buffering device that this utilizes magnetic flow liquid;
Figure 3 shows that the perspective view of magnetic sheet cover, wherein be equiped with the soft magnetism central layer on the magnetic sheet cover;
Figure 4 shows that the main TV structure schematic representation of the semi-initiative vibration isolation buffering device that this utilizes magnetic flow liquid;
Figure 5 shows that this master who utilizes the semi-initiative vibration isolation buffering device of magnetic flow liquid looks the sectional structure schematic representation;
Figure 6 shows that this semi-initiative vibration isolation buffering device that utilizes magnetic flow liquid in Fig. 5 A portion analyse and observe the structure for amplifying schematic representation;
Figure 7 shows that the three-dimensional sectional structure schematic representation that utilizes the semi-initiative vibration isolation buffering device of electrorheological fluid according to of the present invention;
Figure 8 shows that the perspective view of the lid in this semi-initiative vibration isolation buffering device that utilizes electrorheological fluid; And
Figure 9 shows that the perspective view of the another kind of mode of execution of the lid in this semi-initiative vibration isolation buffering device that utilizes electrorheological fluid.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is elaborated.
First embodiment
Referring to Fig. 1,2,5 and 6, comprise ripple sylphon 110, base plate 120, spacer member 130 and top cover 160 based on half active damping damping device of magnetic flow liquid.Wherein, base plate 120 is connected to described ripple sylphon 110 lower ends, and spacer member 130 is connected to ripple sylphon 110 upper ends, and top cover 160 cover caps are on spacer member 130.
Ripple sylphon (elastic member) the 110th, main component is made by traditional viscoelastic material such as rubber or elastic metallic film such as tin-phosphor bronze, in fact is exactly the spring of a hollow, bears traditional passive vibration isolation pooling feature.Externally under the vibratory shock load effect, ripple sylphon 110 can compress as spring or open neatly.
Referring to Fig. 6, following permanent magnet poles (first magnetic field components) 140 and soft magnetism centerbody (the second electric field parts) the 135 common central magnetic fields that form.When ripple sylphon 110 is compressed or opens, distance between following permanent magnet poles 140 and the soft magnetism centerbody 135 is variable, keep certain function relation with external load, with variable in distance, magnetic resistance change rate, the intensity that soft magnetism centerbody 135 is magnetized also keep certain function relation to change with external load thereupon.Can be to be directly proportional exponentially etc.The magnetic property of this relation and following permanent magnet poles 140 and structure, geometrical shape are relevant.
Spacer member (second magnetic field components) 130 is made of jointly last cup-shaped magnetic sheet cover 131 and soft magnetism centerbody 135.Go up in the cup-shaped magnetic sheet cover 131 and have circular hole 132, itself and soft magnetism centerbody 135 utilize non magnetic connecting sheet 136 to carry out concentric fits as support, after the magnetization, and the two opposite pole each other of spacer member 130 and soft magnetism centerbody 135, such as one be the N utmost point, another is the S utmost point.Have annular gap 137 between the two, as damping control magnetic gap, have stronger annulus magnetic field in the magnetic gap, this magnetic field also keeps certain function relation to change with external load as the damping controlling magnetic field thereupon.Simultaneously, the fluid passage between double as main cavity 111 and the cascading water chamber 161 is gone back in this gap 137.The magnetic circuit that is made of the magnetic line of force has been shown among Fig. 6.
Magnetic flow liquid MR (magneto-rheological fluid) is as operation material, and its shear yield strength or viscosity are directly proportional with the Strength Changes of external magnetic field.
The half initiatively realization of characteristic: when equipment bears less load, traditional viscoelastic material or elastic metallic film) adding the passive vibration isolation buffer system that air column forms plays a role.Basically be exactly a common vibration damper, show as software feature (spring that characteristic slope reduces gradually with distortion is called the software feature spring).
When load reached big, half active characteristic progressively shows: ripple sylphon 110 was compressed more, can't hold original magnetic flow liquid MR.Compression magnetic flow liquid MR is through the control magnetic gap, be that gap 137 enters cascading water chamber 161, and the magnetic field of control magnetic gap increases the viscosity of magnetic flow liquid MR, the external hardness of this device, rigidity are increased sharply, the viscous damping of liquid and the sassafras damping that rubs simultaneously increases severely, because the damping controlling magnetic field in the control magnetic gap also keeps certain function relation to change with external load, so hardness, rigidity and damping also keep certain function relation to change with external impetus load.System mainly shows hardware features, and (spring that characteristic slope increases gradually with distortion is called the hardware features spring), thus optimized the consumption and the absorption of energy.
For electronic products such as notebook computers, the frequent more complicated of Environmental Conditions, it is complicated and changeable that the impact of rugged environment such as falls at vibratory shock load, therefore needs miniaturization, the semi-active vibration-isolating buffer system that dynamic characteristic is good.So-called " half initiatively " is exactly without control circuit, and just realizes simple control by structure.
Present embodiment is the variable semi-active vibration-isolating buffering scheme of a kind of damping that a kind of " viscoelastic material (or metallic thin film) structure+add air column+permanent-magnetic field and magnetic flow liquid " formed, can utilize magnetic flow liquid viscosity under the action of a magnetic field to change, realize consumption and absorption preferably energy.
The characteristics of present embodiment are summarized as follows:
A. structure is multiplexing: spring and cavity are combined as a whole.The main body of present embodiment is the ripple sylphon that a traditional viscoelastic material or elastic metallic film are formed, and in fact is exactly a spring, and the main cavity of its double as magnetic flow liquid helps the structure miniaturization.
B. simplified structure is cancelled traditional " piston " that move back and forth, becomes compression " cavity " structure, and profile then has the possibility that is designed to the short cylindrical platform, also helps adaptive small-sized, frivolous product.
C. go up cup-shaped magnetic sheet cover, annulus magnetic field and damping control magnetic gap, cascading water chamber etc. and help the structure miniaturization.
D. adopt combination: mounting type commonly used (3 mounting holes that adopted small-sized electronic product and notebook computer with small-sized electronic product, available Screw connects, or structural modification is with boning-boning as the 3M mighty bond), be convenient to mate with small-sized electronic product.
As required, this embodiment's the physical dimension based on half active damping damping device of electrorheological fluid can reach Φ 15 * 8mm.
E. non-transformer and control circuit: adopt ingenious structure to realize half initiatively, cancelled power supply of the prior art and control circuit, this has reduced again a lot.
F. have complementary advantages, compatible little load and heavy load: carrying out after above-mentioned structure changes, solved the difficulty that one section air column+electrorheological fluid combination is arranged in viscoelastic material+cavity, because viscoelastic material and the complementation of magnetic flow liquid advantage, synthesized and had the variable and excellent comprehensive dynamic characteristic of damping, during little load, present software feature, present hardware features during strong load.
Second embodiment
Referring to Fig. 7, comprise elastic container 210, spacer member 230 and top cover 260 based on half active damping damping device of electrorheological fluid.Wherein, spacer member 230 cover caps are in elastic container 210 upper ends, and top cover 260 cover caps are on spacer member 230.
Elastic container (elastic member) the 210th, main component is made by insulating material such as traditional viscoelastic material such as rubber, bears traditional passive vibration isolation pooling feature.Itself and spacer member 230 common qualifications form the main cavity 211 (first cavity) that stores one section air column and a small amount of a few approximately gram-tens gram operation material electrorheological fluid ER.
Spacer member (the second electric field parts) 230 is made by the conductive elastomer such as tin-phosphor bronze, itself and cover cap top cover 260 common qualifications thereon form cascading water chamber (second cavity) 161, when bearing dynamics load, as the buffer area of control damping change for system.
Inside bottom at main cavity 211 is fixed (or compression moulding combination) piezo ceramic element (the first electric field parts) 240, this piezo ceramic element 240 comprises piezoelectric ceramic, be encapsulated in the thin box of elastic metallic (as: tin-phosphor bronze), as mechanical vibration or external force, will produce certain voltage, as strong mechanical vibration or external force, will produce high voltage.
This piezo ceramic element 240 has inside and outside electrode, interior electrode is a high-potential electrode, dispatch from foreign news agency is ground electrode very, be connected to spacer member (the second electric field parts) 230, connecting means can be as showing as Fig. 7, flexible wire 245 is connected to spacer member 230, in the time of also can being compression moulding with flexible wire 245 hot pressing in the inwall of the elastic container 210 of viscoelastic material, between the interior electrode that voltage is added to spacer member 230 and piezo ceramic element 240.Thereby voltage is added to the two ends up and down of electrorheological fluid ER.
The cascading water chamber 233 that is positioned at spacer member 230 tops is when bearing dynamics load for system, after electrorheological fluid ER is compressed, to be forced into through cascading water groove 232, as the buffer space of control damping change.
Fig. 8 and 9 shows the elastic baffle spare 230 of two kinds of different structures, and elastic baffle spare 230 wherein shown in Figure 8 is the spring chip, and its diapire is plane, has a plurality of long trough cascading water grooves 232 above.Elastic baffle spare shown in Figure 9 230 is the ripple film spring, and its diapire is undulatory membrane wall, i.e. ripple membranous wall is to provide better elasticity.
When being in stronger external excitation (such as, fall, impact, shake by force), elastic container 210 is compressed or opens, amplitude is very big, spring 225 withstands on insulator 220 on the piezo ceramic element 240, piezo ceramic element 240 is passed to external vibration in bottom with elastic container 210, makes piezo ceramic element 240 produce high voltage because of piezoelectric effect, and this voltage is added on electrorheological fluid ER, make the characteristic of electrorheological fluid keep certain function relation to change with external load, change the class solid state into from flowing state, its apparent viscosity surge several magnitude, damping increases sharply.
Because electrorheological fluid main cavity 211 is greatly reduced, electrorheological fluid ER enters cascading water chamber 233 through cascading water groove 232 under forced draught.Because the viscosity of electrorheological fluid ER is increased sharply, by the time will produce bigger damping, comprise the viscous damping of liquid and the sassafras damping increase that rubs, add that air is compressed the formation damping, thereby can bring into play the effect of convergent response peak value effectively.
At this moment, except damping increased, the external hardness of semi-initiative vibration isolation buffering device of the present invention increased sharply, and comprehensively formed hardware features (spring that characteristic slope increases gradually with distortion is called the hardware features spring), thereby optimized the effect of the decay and the absorption of energy, avoided harm.
The semi-initiative vibration isolation buffering device based on electrorheological fluid of present embodiment has the characteristics of " half initiatively ", " miniaturization ", and has the comprehensive dynamic characteristic of " compatible little load and heavy load ".This device can adapt to complex environment, for example can guarantee the proper functioning under-30 ℃ to+80 ℃.
A kind of miniaturization that present embodiment is a kind of viscoelastic material structure, form in conjunction with air column, piezo ceramic element and current liquid the semi-active vibration-isolating buffer system.Has the variable and good dynamic characteristic of damping.Realize consumption and absorption preferably, avoided the generation of harm energy.
Present embodiment main body elastic container is the common anti-vibration and shock element that a traditional viscoelastic material (as: insulating material such as rubber) is made, the primary inner lumen body is filled with little air and electrorheological fluid, when equipment bears less load, the gas spring and the damping that add air with elastic container play a major role, electrorheological fluid plays a secondary role, and brings into play traditional passive vibration isolation pooling feature.Externally under the vibratory shock load effect, elastic container can be compressed flexibly or be opened.This moment, elastic container presented software feature (spring that characteristic slope reduces gradually with distortion is called the software feature spring).
The characteristics of present embodiment are summarized as follows:
A. structure is multiplexing: spring and cavity are combined as a whole.The main body elastic container of present embodiment is a traditional viscoelastic material (rubber, insulating material) the common anti-vibration and shock element of Zu Chenging, it is a hollow cavity spare, and there is one section air column inside, the main cavity of a small amount of for storing (a few approximately gram-tens gram) the operation material rheology liquid of holding concurrently.Help the structure miniaturization.
B. simplified structure is cancelled traditional " piston " that move back and forth, becomes compression " cavity " structure, also helps miniaturization.
C. spacer member, cascading water groove, cascading water chamber make the miniaturization of control damping structure.
D. can adopt the mounting type commonly used (Screw is connected, or bonds with the 3M mighty bond) of small-sized electronic product and notebook computer, be convenient to mate with small-sized electronic product.
This embodiment's the physical dimension based on half active damping damping device of electrorheological fluid can reach Φ 15 * 8mm.
E. compatible little load and heavy load.After solving structural problem, one section air column+electrorheological fluid is arranged, in viscoelastic material+cavity because viscoelastic material and the complementation of electrorheological fluid advantage, synthesized and had the variable and excellent comprehensive frequency characteristic of damping, during little load, present software feature, present hardware features during strong load.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (25)
1. semi-initiative vibration isolation buffering device, comprise first cavity, (111) and second cavity, (161), and first magnetic field components that is used to form magnetic field, (140) and second magnetic field components, (130), wherein said first cavity, (111) with described second cavity, (161) has the fluid passage between, (132), described first cavity, (111) accommodate magnetic flow liquid in, (MR), described first magnetic field components, (140) and described second magnetic field components, (130) across described magnetic flow liquid, (MR) be oppositely arranged, it is characterized in that
At least the sidewall of described first cavity (111) constitutes by applying the telescopic elastic member of direction (110) along load;
Described first magnetic field components (140) directly or indirectly is connected to the lower end of the sidewall of described first cavity (111), and described second magnetic field components (130) directly or indirectly is connected to the upper end of the sidewall of described first cavity (111).
2. semi-initiative vibration isolation buffering device according to claim 1 is characterized in that, described first cavity (111) is separated by spacer member (130) with described second cavity (161), and described fluid passage (132) are formed on the described spacer member (130).
3. semi-initiative vibration isolation buffering device according to claim 1, it is characterized in that described first cavity (111) is limited by described elastic member (110), the base plate (120) that is connected to the described spacer member (130) of described elastic member (110) upper end and is connected to described elastic member (110) lower end and forms.
4. semi-initiative vibration isolation buffering device according to claim 3 is characterized in that, the top cover (160) on described spacer member (130) limits and forms described second cavity (161) by a described spacer member (130) and a cover cap.
5. semi-initiative vibration isolation buffering device according to claim 4 is characterized in that, described first magnetic field components (140) is a permanent magnet.
6. semi-initiative vibration isolation buffering device according to claim 5 is characterized in that, described second magnetic field components (130) is made of described spacer member (130), is soft magnetic bodies.
7. semi-initiative vibration isolation buffering device according to claim 6, it is characterized in that, described spacer member (130) comprises soft magnet plate cover (131) and is arranged on the soft magnetism center plate (135) at described soft magnet plate cover (131) middle part, gap (137) between described soft magnet plate cover (130) and the described soft magnetism center plate (135) forms described fluid passage, and constitutes magnetic gap simultaneously.
8. semi-initiative vibration isolation buffering device according to claim 7 is characterized in that, described soft magnetism center plate (135) is connected on the described soft magnet plate cover (131) by the support (136) that non-magnet material constitutes.
9. according to each described semi-initiative vibration isolation buffering device in the claim 1 to 8, it is characterized in that described elastic member (110) is made by viscoelastic material or elastic metallic film.
10. according to each described semi-initiative vibration isolation buffering device in the claim 1 to 8, it is characterized in that described elastic member (110) is a ripple sylphon.
11., it is characterized in that the bottom of described first cavity (111) holds described magnetic flow liquid (MR) according to each described semi-initiative vibration isolation buffering device in the claim 1 to 8.
12. semi-initiative vibration isolation buffering device according to claim 11 is characterized in that, the top of described first cavity (111) accommodates air, forms air column.
13. semi-initiative vibration isolation buffering device according to claim 12 is characterized in that, also comprises air uniaxial pressure modulating valve (133), is connected with the air of described second cavity (161) or described first cavity (111).
14. semi-initiative vibration isolation buffering device, it is characterized in that, comprise first cavity, (211) and second cavity, (233), and the first electric field parts that are used to form electric field, (240) and the second electric field parts, (230), wherein said first cavity, (211) with described second cavity, (233) has the fluid passage between, (232), described first cavity, (211) accommodate electrorheological fluid in, (ER), the described first electric field parts, (240) and the described second electric field parts, (230) across described electrorheological fluid, (ER) be oppositely arranged, it is characterized in that
At least the sidewall of described first cavity (211) constitutes by applying the telescopic elastic member of direction (210) along load;
The described first electric field parts (240) directly or indirectly are connected to the lower end of the sidewall of described first cavity (211), and the described second electric field parts (230) directly or indirectly are connected to the upper end of the sidewall of described first cavity (211).
15. semi-initiative vibration isolation buffering device according to claim 14 is characterized in that, described first cavity (211) is separated by spacer member (230) with described second cavity (233), and described fluid passage (232) are formed on the described spacer member (230).
16. semi-initiative vibration isolation buffering device according to claim 14, it is characterized in that, described elastic member (210) has diapire, and described first cavity (211) is limited by described elastic member (210) and the described spacer member (230) that is connected to described elastic member (210) upper end and forms.
17. semi-initiative vibration isolation buffering device according to claim 16 is characterized in that, the top cover (260) on described spacer member (230) limits and forms described second cavity (233) by a described spacer member (230) and a cover cap.
18. semi-initiative vibration isolation buffering device according to claim 17, it is characterized in that, the described first electric field parts (240) are piezo ceramic element, be arranged on described first cavity (211) inside bottom, the described second electric field parts (230) are described spacer member (230), be made of metal, constitute an electrode plate, described piezo ceramic element (240) is electrically connected with described spacer member (230) by lead (245).
19. semi-initiative vibration isolation buffering device according to claim 18 is characterized in that, described spacer member (230) middle part is provided with insulator (220), and the lower end of described insulator (220) contacts with described piezo ceramic element (240).
20. semi-initiative vibration isolation buffering device according to claim 19, it is characterized in that, described insulator (220) is slidably disposed in the hole (231) at described spacer member (230) middle part, and be arranged with spring (225), described spring (225) with described insulator (220) towards described piezo ceramic element (240) bias voltage.
21., it is characterized in that described spacer member (230) comprises elastic thin-wall (235) according to claim 19 or 20 described semi-initiative vibration isolation buffering devices, described insulator (220) is installed on the described elastic thin-wall (235).
22. semi-initiative vibration isolation buffering device according to claim 21 is characterized in that, described elastic thin-wall (235) is the ripple membranous wall.
23., it is characterized in that described elastic member (210) is made by viscoelastic material according to each described semi-initiative vibration isolation buffering device in the claim 14 to 20.
24., it is characterized in that the bottom of described first cavity (211) holds described electrorheological fluid (ER) according to each described semi-initiative vibration isolation buffering device in the claim 14 to 20.
25. semi-initiative vibration isolation buffering device according to claim 24 is characterized in that, the top of described first cavity (211) accommodates air, forms air column.
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