CN105276051A - Magnetic particle swing vibration absorption unit and method, combination device and electromagnetic damping power generation mechanism - Google Patents
Magnetic particle swing vibration absorption unit and method, combination device and electromagnetic damping power generation mechanism Download PDFInfo
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- CN105276051A CN105276051A CN201510657475.2A CN201510657475A CN105276051A CN 105276051 A CN105276051 A CN 105276051A CN 201510657475 A CN201510657475 A CN 201510657475A CN 105276051 A CN105276051 A CN 105276051A
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Abstract
The invention provides a magnetic particle swing vibration absorption unit which comprises rotary magnetic particles and a magnetic field generation device. The magnetic field generation device is used for generating magnetic field acting force. Under the effect of the acting force of a magnetic field, the deflection angle of the rotary magnetic particles relative to the magnetic field generation device is changed to adjust the system rigidity and system inherent frequency of the magnetic particle swing vibration absorption unit. The invention further provides a corresponding vibration absorption method, a combination device and an electromagnetic damping power generation mechanism. According to the magnetic particle swing vibration absorption unit and method, the combination device and the electromagnetic damping power generation mechanism, the deflection position or angle of the magnetic particles relative to the magnetic field generation device is adjusted by adjusting the current of a magnetic field generation coil in the magnetic field generation device, so that the magnetic force torque or torsional rigidity of the magnetic field generation device and the magnetic particles is changed, the system inherent frequency of the vibration absorption unit can be adjusted accordingly, and thus vibration of a controlled object can be inhibited more effectively.
Description
Technical field
The present invention relates to active vibration absorber technical field, particularly, relate to magnetic particle and swing absorbing unit and method and combination unit, electromagnetic damping power facility, especially can according to the corresponding with same frequency and reversed-phase resonance of vibration source vibration frequency to carry out magnetic particle swing absorbing unit, vibration absorption method, combination unit, the electromagnetic damping power facility of absorbing.
Background technique
Vibration problem is the ubiquitous problem in precision engineering field, subtracts theory of vibration isolation and technology and device research also widely for vibration.Because dynamic vibration absorber installs the mode that just can realize vibration control effect by modes such as adsorptions not affecting under principal oscillation body (controlled device) any structure situation, structural design is simple, it is very convenient to install and use, and therefore receives most attention.
But dynamic vibration absorber is after project organization is determined, its frequency subtracting vibration isolation just determines, realize based on controlled device the absorbing principle that resonates, when being changed by the vibration frequency of control object, so dynamic vibration absorber shock attenuation result will be greatly affected.Therefore, people have developed variable dynamic vibration absorber structural rigidity further, and then can motivation of adjustment bump leveller natural frequency, reach the best initiatively shock attenuation result of vibration to mate the vibration frequency change of controlled device.Find through retrieval: application number: 201320797303.1, the applying date: 2013-12-05, propose a kind of cantilever beam type vibration absorber with adjustable frequency patent, comprise base, overhang, quality disk, the lower end of base is fixed on vibratory equipment, the upper end of base and quality disk all arrange through hole, in through hole, all internal thread is set, overhang is arranged the outside thread matched with through hole, overhang is arranged in the through hole of base and quality disk by outside thread, the through hole two ends of base are installed set screw nut and are fixed the position of base and overhang, the relative position of quality disk and overhang limits by the through hole two ends mounting and adjusting nut of quality disk, and adjusting nut is adjustable, namely the relative position of quality disk and overhang is adjustable.This model utility points out that its absorbing frequency can free adjusting, and adjustable leeway is larger.Part is easy to processing and replaces.As compared to the tunable bump leveller of electromagnetic type and electrodynamic type, without electromagnetic leakage phenomenon.Structure is simple, working stability, is easy to install.
This technical purpose realizes frequency-adjustable, but its frequency-adjustable is the relative position realizing quality disk and overhang by manual off-line adjusting nut to be reached and change bump leveller natural frequency object.The shortcoming of this mode is its adjustment mode can not be on-line tuning in controlled device work, and structure just secures after each adjustment, thus natural frequency is determined, bump leveller when still can not solve controlled device frequency in change situation has the correspondence of frequency to adjust most.In addition, in the suppression of close frequency and multi-frequency eigen vibration problem, current technology all cannot solve.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of magnetic particle and swing absorbing unit and method and combination unit, electromagnetic damping power facility.
Swing absorbing unit according to a kind of magnetic particle provided by the invention, comprise and rotate magnetic particle, field generator for magnetic;
Field generator for magnetic is for generation of magnetic force;
Under the effect of described magnetic force, the swing angle rotating magnetic particle relative magnetic field generating means changes, thus the system stiffness making magnetic particle swing absorbing unit changes because of the structural change of rotating magnetic particle beat position and causing, and make the torque of magnetic force of rotating magnetic particle and field generator for magnetic change and change the torsional stiffness of rotating magnetic particle, and then change the system stiffness that magnetic particle swings absorbing unit.
Preferably, there is following arbitrary group technique feature:
-rotate the profile structure of magnetic particle about axis of rotation symmetry, and the quality of rotating magnetic particle is uneven;
The profile structure of-rotation magnetic particle is asymmetric about the axis of rotation, and rotates the uniform quality of magnetic particle;
-rotate the profile structure of magnetic particle about axis of rotation symmetry, and rotate the uniform quality of magnetic particle; The electromagnetism generation coil laid respectively in the different field generator for magnetic rotating magnetic particle two ends passes to difference electrical signal, carries out magnetic field excitation to rotation magnetic particle;
-rotation magnetic particle is rotator inertia square variable magnetic particle.
Preferably, described rotation magnetic particle is permanent magnet or electromagnet; Described field generator for magnetic is electromagnetic field generation coil or is electromagnetic field generation coil and permanent magnet.
Preferably, configuration quality body is also comprised; Configuration quality body is connected to the position outside the geometrical center of rotating magnetic particle.
Preferably, induced current coil is also comprised;
The excitation of the rotation magnetic particle that induced current coil is rotated and generation current power consumption generating and electromagnetic damping.
Preferably, also comprise for monitoring the sensing device rotating magnetic particle beat degree.
Preferably, described sensing device comprises mangneto piezoelectric transducer, magnetoresistance material sensor or Characteristic of Magneto-Optical fiber sensor.
Vibration absorption method is swung according to a kind of magnetic particle provided by the invention, above-mentioned magnetic particle is utilized to swing absorbing unit, the magnetic fields magnetoelasticity power that the field generator for magnetic making described magnetic particle swing absorbing unit produces is ordered about and is rotated magnetic particle rotation beat to change the torsional stiffness of rotating magnetic particle, makes the shock absorption system natural frequency of described magnetic particle swing absorbing unit and is carried out absorbing by the vibration frequency with same frequency and reversed-phase of vibration isolation object.
Stiffness tuning method is swung according to a kind of magnetic particle provided by the invention, above-mentioned magnetic particle is utilized to swing absorbing unit, the magnetic fields that the field generator for magnetic making described magnetic particle swing absorbing unit produces makes magnetic particle swing, magnetic particle is made to be flapped toward magnetic direction, because magnetic particle itself is rigid body, so in this swing process, described magnetic particle swings absorbing unit and can increase gradually at the support stiffness of mass body moving direction, presents maximum rigidity until forward to when overlapping with mass body moving direction; Make described magnetic particle swing absorbing unit load the swing angle of change magnetic particle by electromagnetic force and change the system stiffness that described magnetic particle swings absorbing unit.
Swing absorbing unit combination device according to a kind of magnetic particle provided by the invention, comprise the multiple above-mentioned magnetic particle placed according to equidirectional placement or multiple directions and swing absorbing unit.
Preferably, described multiple above-mentioned magnetic particle swings in absorbing unit, and some or all of magnetic particle swings absorbing unit and forms one or more complex group zoarium;
The rotation magnetic particle forming multiple magnetic particles swing absorbing unit of same complex group zoarium is connected on same rotatingshaft.
Preferably, described magnetic particle swings absorbing unit according to array arrangement.
Preferably, magnetic particle to swing between absorbing unit in X Y the arrangement of Z-direction solid array to connect or outside radial array arrangement connects in center.
Vibration absorption method is swung according to a kind of magnetic particle provided by the invention, above-mentioned magnetic particle is utilized to swing absorbing unit combination device, swinging the shock absorption system natural frequency of absorbing unit by adjusting any one or multiple magnetic particle in described magnetic particle swing absorbing unit combination device, realizing the absorbing of the multi-frequency superpositing vibration frequency of controlled device.
According to a kind of electromagnetic damping power facility swinging absorbing unit based on above-mentioned magnetic particle that invention provides, the vibration of controlled device swings the induced current coil of absorbing unit by magnetic particle, vibrational energy is converted into electric energy; And/or the vibration of controlled device swings the mangneto piezoelectric transducer of absorbing unit by magnetic particle, and vibrational energy is converted into electric energy.
According to a kind of electromagnetic damping power facility swinging absorbing unit based on above-mentioned magnetic particle provided by the invention, the induced current coil that the vibrational excitation magnetic particle of controlled device swings absorbing unit produces electrical signal of inducting, and this electrical signal of inducting swings for magnetic particle or the sensing of system vibration state.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention can carry out the resonance of with same frequency and reversed-phase according to the vibration frequency of vibration source, thus obtains the vibration suppression of optimal effectiveness, and vibrational energy can be converted into electric energy and generate electricity.
2, the present invention is by the electric current of electromagnetic field generating coil in adjustment field generator for magnetic, adjust beat position or the angle of magnetic particle relative magnetic field generating means, thus change the torque of magnetic force of field generator for magnetic and magnetic particle, or torsional stiffness, namely this can regulate the system frequency of absorbing unit, and then realize more effectively suppressing controlled device vibration.
3, the present invention rotates the beat of magnetic particle by the electrical signal adjustment that piezoelectric sensor arrangement collects, and realizes the accurate control of absorbing frequency.
4, because the vibration frequency of controlled device is generally multifrequency superposition, absorbing unit combination device provided by the invention, the torsional stiffness of rotating magnetic particle can be adjusted in each absorbing unit, and then realize carrying out unanimously the vibration frequency of multi-frequency superposition.
5, the present invention can also pass through induced current coil and/or piezoelectric sensor arrangement, and the vibrational energy of controlled device is converted into electric energy, and due to the persistency of vibrational energy, and can be adjusted to and be in resonance state, electricity generating device of the present invention has higher generating efficiency.
6, magnetic particle provided by the invention swings absorbing unit, combination unit and application thereof, the accurate suppression can not only be realized to the single vibration of controlled device, accurate inhibitory control can also be carried out to the multi-frequency superpositing vibration of controlled device, by the application that the particularity of structure can also realize barycenter adjustment, inertia displacement driving and generate electricity, be adapted at multi-field popularization.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation that the present invention contains configuration quality body.
Fig. 3 is the structural representation that the present invention contains multiple rotation magnetic particle.
Fig. 4 is a structural representation of electromagnetic field generation coil and induced current coil arrangement in the present invention.
Fig. 5 rotates the structural representation that magnetic particle adopts the eccentric permanent magnet of structure in the present invention.
Fig. 6 is the structural representation rotating moment of inertia variable magnetic particle in the present invention.
Fig. 7 is the structural representation that in the present invention, 2 absorbing unit form two electromagnetic field generation coil, dual permanent-magnet rotates the assemblying body of magnetic particle.
Fig. 8 is the structural representation of assemblying body that in the present invention, 4 absorbing unit form two electromagnetic field generation coil, four permanent magnet rotating magnetic particles.
Fig. 9 is a structural representation of the combination unit of absorbing unit forming array in the present invention.
In figure:
1-electromagnetic field generation coil
2-induced current coil
3-rotates magnetic particle
4-rotatingshaft
5-framework
6-is by vibration isolation subject table
7-configuration quality body
8-connects axostylus axostyle
9-deformable spring
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some changes and improvements can also be made.These all belong to protection scope of the present invention.
The present invention utilize absorbing principle by the vibration frequency of vibration isolation object with when on it, the frequency of bump leveller is identical, produce resonance, thus transfer to by the vibration kinetic energy of vibration isolation object on bump leveller preferably, thus make to be reduced by vibration isolation vibrating objects, and generation subtracts vibration isolating effect.ω=(k/m) simply can be had for itself natural frequency of a system
1/2.Wherein, k is shock absorption system stiffness coefficient, and m is shock absorption system quality, and ω is shock absorption system natural frequency.Namely by changing k or/and m all can change the natural frequency ω of shock absorption system.
The present invention is based on this principle, a kind of rotation magnetic particle (permanent magnet or electromagnet) is proposed, the magnetic field (and rotating between magnetic particle periphery ferromagnet) produced by the electromagnetic field generation coil rotating magnetic particle and periphery is interacted, and produce a suitable electromagnetism and/or ferromagnetic, act on the magnetic force (pulling force or repulsion) rotating magnetic particle, thus change the initial rotation characteristic of rotating magnetic particle, namely change and rotate the torsional variation degree of magnetic particle under outside magnetic force effect, thus change the torsional stiffness of rotating magnetic particle, and the absorbing stiffness coefficient k being finally rendered as shock absorption system changes, final according to ω=(k/m)
1/2and shock absorption system natural frequency can be changed.Therefore, can pass through to apply electric excitation electromagnetic field electric current, or Electromagnetic heating iron magnetic action changes torsional stiffness effect in the suction of magnetic particle, and realize the regulation and control of shock absorption system natural frequency ω.Thus when being ω ＇ by the vibration frequency of vibration isolation object, we can be and ω ＇ with same frequency and reversed-phase state by exciting current adjustment shock absorption system natural frequency, thus reach best shock attenuation result.
On the other hand, the rigidity of magnetic particle shock absorption system can also simultaneously by regulating magnetic field, magnetic particle is made to swing (magnetic particle length direction is rotated to vertical direction by level as shown in Figure 1), because magnetic particle itself is rigid body, so in this swing process, absorbing cellular system can increase gradually in the rigidity of mass body moving direction, until forward to gravitational direction/vertical direction presents maximum.So, also can add while loading by electromagnetic force the swing angle changing magnetic particle and change absorbing cellular system rigidity.
As shown in Figure 1, the invention provides a kind of magnetic particle and swing absorbing unit, comprise and rotate magnetic particle, field generator for magnetic; Field generator for magnetic is for generation of magnetic force, under the effect of described magnetic force, the swing angle rotating magnetic particle relative magnetic field generating means changes, thus the system stiffness making magnetic particle swing absorbing unit changes because of the structural change of rotating magnetic particle beat position and causing, and the torsional stiffness making to rotate magnetic particle or the torque of magnetic force of rotating magnetic particle and field generator for magnetic change to change the absorbing stiffness coefficient that magnetic particle swings absorbing unit.Wherein, magnetic particle is rotated by rotatingshaft or ball-type hinge beat.
The design of rotating magnetic particle can have multiple choices, and such as comparatively preferred mode has: the profile structure of rotating magnetic particle is symmetrical about the axis of rotation, and the quality of rotating magnetic particle is uneven, such as shown in Figure 1; Or the profile structure of rotating magnetic particle is asymmetric about the axis of rotation, and rotate the uniform quality of magnetic particle, such as shown in Figure 5.Other design proposal can also be had in how preferred mode, such as, the profile structure of rotating magnetic particle is symmetrical about the axis of rotation, and rotate the uniform quality of magnetic particle, the electromagnetism generation coil laid respectively in the different field generator for magnetic rotating magnetic particle two ends passes to difference electrical signal (such as size of current is different) and generates difference magnetic field, carries out magnetic field excitation to rotation magnetic particle; Again such as, as shown in Figure 6, rotating magnetic particle can be rotator inertia square variable magnetic particle, particularly, one or more controlled moving mass blocks (permanent magnet or ferromagnet) are set at magnetic inside particles, symmetrical or asymmetric arrangement between multiple controlled moving mass block.This controlled moving mass block can realize moving in the position of magnetic inside particles by the electromagnetic attraction of electromagnetic generator or repulsion, thus realize the change of rotator inertia square, be equivalent to the torsional stiffness changing absorbing cellular system, and then change system stiffness and natural frequency.For when wherein mass body is non-magnetizer material, the motion of its position can be controlled by deformable spring.This deformable spring can be shape memory alloy spring or thermal expansion material body, and wherein, thermal expansion material body can carry out temperature control by electric heating.
Particularly, described rotation magnetic particle is permanent magnet or electromagnet; Described field generator for magnetic is electromagnetic field generation coil or is electromagnetic field generation coil and permanent magnet.The arrangement of described field generator for magnetic can have multiple, and such as Fig. 1, Fig. 4 respectively illustrate different arrangements, and it all belongs within protection scope of the present invention.
Wherein, swing in absorbing unit at a magnetic particle, the quantity of rotating magnetic particle can be one or more, such as, has illustrated that a magnetic particle swings the situation of rotating magnetic particle in absorbing unit containing two in Fig. 3.
In preference, described magnetic particle swings absorbing unit and also comprises configuration quality body; Configuration quality body is connected to the position outside the geometrical center of rotating magnetic particle.As shown in Figure 2, the isolation frequency scope of absorbing unit can be increased by increasing configuration quality body, especially low frequency vibration isolation effect.
In preference, described magnetic particle swings absorbing unit and also comprises induced current coil; The excitation of the rotation magnetic particle that induced current coil is rotated and generation current power consumption generating and electromagnetic damping.The arrangement of described induced current coil can have multiple, and such as Fig. 1, Fig. 4 respectively illustrate different arrangements, and it all belongs within protection scope of the present invention.
In preference, described magnetic particle swings absorbing unit and also comprises for monitoring the sensing device rotating magnetic particle beat degree.Described sensing device comprises arranges the sub mangneto piezoelectric transducer at rotation magnetic particle periphery, magnetoresistance material sensor or Characteristic of Magneto-Optical fiber sensor.
The present invention also provides a kind of magnetic particle to swing vibration absorption method, it utilizes described magnetic particle to swing absorbing unit, the magnetic force that the field generator for magnetic making described magnetic particle swing absorbing unit produces orders about and rotates magnetic particle rotation beat to change the torsional stiffness of rotating magnetic particle, makes the shock absorption system natural frequency of described magnetic particle swing absorbing unit and is carried out absorbing by the vibration frequency with same frequency and reversed-phase of vibration isolation object.
Described magnetic particle swings absorbing unit operationally, add electromagnetic force or do not add electromagnetic force, the rotating magnet be made up of permanent magnet or electromagnet is made to be in an initial rest position, when to be subject to frequency be ω ＇ vibration interference to controlled device platform, rotating magnet beat angle is made by loading electromagnetic force, thus change stressed degree and the equilibrium position of rotating magnet, based on aforementioned absorbing principle, shock absorption system stiffness coefficient k can be made to change, finally according to changing shock absorption system natural frequency until ω ＇.This effect can be equivalent to the mass-spring system that a mass block (as eccentric massblock m in Fig. 1) is arranged on (magnetic spring) on a spring.And, the value of the elastic coefficient k of this mass-spring system can be passed through the close degree of magnetic field field current intensity adjustment magnetic force or magnetic particle and vertical direction (gravitational direction) and dynamically change, real-time adjustment, until best absorbing state when can produce resonance.
As shown in Fig. 7, Fig. 8, Fig. 9, the present invention also provides a kind of magnetic particle to swing absorbing unit combination device, comprises the multiple described magnetic particle placed according to equidirectional placement or multiple directions and swings absorbing unit.Described multiple magnetic particle swings in absorbing unit, and some or all of magnetic particle swings absorbing unit and forms one or more complex group zoarium, as Fig. 7, Fig. 8 respectively illustrate different complex group zoariums; The rotation magnetic particle forming multiple magnetic particles swing absorbing unit of same complex group zoarium is connected on same rotatingshaft, and like this, same electromagnetic field can act on multiple rotation magnetic particle, and from making the efficiency of complex group zoarium higher.
As shown in Figure 9, described magnetic particle swings absorbing unit according to array arrangement.Wherein, magnetic particle to swing between absorbing unit in X Y the arrangement of Z-direction solid array connect or outside radial array arrangement can connect in center in change case.In preference, each magnetic particle swings absorbing unit can different placement directions, thus realizes multi-direction/multivariant shock attenuation result.
The present invention also provides a kind of magnetic particle to swing vibration absorption method, it utilizes described magnetic particle to swing absorbing unit combination device, swinging the shock absorption system natural frequency of absorbing unit by adjusting any one or multiple magnetic particle in described magnetic particle swing absorbing unit combination device, realizing the absorbing of the multi-frequency superpositing vibration frequency of controlled device.
The present invention also provides a kind of electromagnetic damping power facility swinging absorbing unit based on described magnetic particle, wherein:
The vibration of-controlled device swings the induced current coil of absorbing unit by magnetic particle, vibrational energy is converted into electric energy; And/or
The vibration of-controlled device swings the mangneto piezoelectric transducer of absorbing unit by magnetic particle, vibrational energy is converted into electric energy.
The present invention also provides a kind of electromagnetic damping power facility swinging absorbing unit based on described magnetic particle, wherein, the induced current coil that the vibrational excitation magnetic particle of controlled device swings absorbing unit produces electrical signal of inducting, and this electrical signal of inducting swings for magnetic particle or the sensing of system vibration state.
Below in conjunction with each figure, the present invention is made a more detailed description.
In embodiment shown in Fig. 1, respectively in the horizontal direction, rotation magnetic particle is arranged in the magnetic field that electromagnetic field generation coil produces, and its beat can encourage induced current coil to generate induced current for electromagnetic field generation coil and induced current coil.The profile rotating magnetic particle is oblong, and its axis of rotation is oblong geometrical center, and the zed in Fig. 1 and z represent vibration.In Fig. 1, rotate magnetic particle and be connected to columned rotatingshaft, and in change case, rotate magnetic particle and can connect ball axle (such as ball-type hinge).Wherein, the described axis of rotation preferably refers to and rotates magnetic particle around its virtual straight line rotated or central point, such as, when rotating magnetic particle and being connected on columned rotatingshaft, the axis of rotation refers to the medial axis of rotatingshaft, again such as, when rotating magnetic particle and being connected on ball axle, the axis of rotation refer to rotate magnetic particle around rotation, a certain radial alignment of ball axle.
Further, Fig. 2 can be understood to preference embodiment illustrated in fig. 1, wherein, is connected with configuration quality block at the non-geometric center position rotating magnetic particle.Fig. 2 can be understood to preference embodiment illustrated in fig. 1, and wherein, the quantity of rotating magnetic particle in Fig. 2 is one, and the quantity of rotating magnetic particle in Fig. 3 is two.Fig. 4 can be understood to change case embodiment illustrated in fig. 2, relative to the embodiment shown in Fig. 2, in the embodiment shown in fig. 4, what field generator for magnetic adopted is the structure that electromagnet combines with permanent magnet, and the position of induced current coil changes and the quantity of electromagnet changes.
Further, Fig. 5 can be understood to change case embodiment illustrated in fig. 1, relative to the embodiment shown in Fig. 1, in the embodiment shown in fig. 5, rotates the uniform quality of magnetic particle, and is the non-symmetry structure relative to the axis of rotation.
Further, Fig. 6 is the structural representation of rotator inertia square variable magnetic particle, preference embodiment illustrated in fig. 1 can be understood to, wherein, shown in Fig. 6 a two controlled moving mass block is all positioned at the sliding channel rotating magnetic inside particles, and the center of rotating magnetic particle is connected to respectively by respective deformable spring, controlled moving mass block can realize moving in the position of magnetic inside particles by the electromagnetic attraction of electromagnetic generator or repulsion, thus realize the change of rotator inertia square, be equivalent to the torsional stiffness changing absorbing cellular system, and then change system stiffness and natural frequency.Particularly, when controlled moving mass block is non-magnetizer, by the motion of controlled moving mass block position, the mass distribution of rotating magnetic particle entirety can be changed, and the swing angle rotating magnetic particle relative magnetic field generating means can be made to change, thus the system stiffness directly making magnetic particle swing absorbing unit changes, further, when controlled moving mass block is magnet (permanent magnet or electromagnet), the torque of magnetic force of controlled moving mass block and field generator for magnetic changes and changes the torsional stiffness of rotating magnetic particle entirety, and then adjust the system stiffness that magnetic particle swings absorbing unit further.The quantity of controlled moving mass block can be one or more, even or non-uniform Distribution in rotation magnetic particle.
Fig. 7, Fig. 8, Fig. 9 are the embodiment that magnetic particle swings absorbing unit combination device, also can be understood to preference embodiment illustrated in fig. 1.Wherein, Fig. 7 and Fig. 8 respectively illustrates the structural representation of 2,4 absorbing unit combination, Fig. 9 shows and swings absorbing unit according to array arrangement magnetic particle, and wherein each magnetic particle swings absorbing unit can different placement directions, thus realizes multi-direction/multivariant shock attenuation result.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or revise, and this does not affect flesh and blood of the present invention.When not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Claims (10)
1. magnetic particle swings an absorbing unit, it is characterized in that, comprises and rotates magnetic particle, field generator for magnetic;
Field generator for magnetic is for generation of magnetic force;
Under the effect of described magnetic force, the swing angle rotating magnetic particle relative magnetic field generating means changes, thus the system stiffness making magnetic particle swing absorbing unit changes because of the structural change of rotating magnetic particle beat position and causing, and make the torque of magnetic force of rotating magnetic particle and field generator for magnetic change and change the torsional stiffness of rotating magnetic particle, and then change the system stiffness that magnetic particle swings absorbing unit.
2. magnetic particle according to claim 1 swings absorbing unit, and it is characterized in that, described rotation magnetic particle is permanent magnet or electromagnet; Described field generator for magnetic is electromagnetic field generation coil or is electromagnetic field generation coil and permanent magnet;
Described magnetic particle swings absorbing unit and also has following arbitrary group technique feature:
-rotate the profile structure of magnetic particle about axis of rotation symmetry, and the quality of rotating magnetic particle is uneven;
The profile structure of-rotation magnetic particle is asymmetric about the axis of rotation, and rotates the uniform quality of magnetic particle;
-rotate the profile structure of magnetic particle about axis of rotation symmetry, and rotate the uniform quality of magnetic particle; The electromagnetism generation coil laid respectively in the different field generator for magnetic rotating magnetic particle two ends passes to difference electrical signal, carries out magnetic field excitation to rotation magnetic particle;
-rotation magnetic particle is rotator inertia square variable magnetic particle.
3. magnetic particle according to claim 1 swings absorbing unit, it is characterized in that, also comprise following any one or appoint multiple device:
-configuration quality body, configuration quality body is connected to the position outside the geometrical center of rotating magnetic particle;
-induced current coil, the excitation of the rotation magnetic particle that induced current coil is rotated and generation current power consumption generating and electromagnetic damping;
-for monitoring the sensing device rotating magnetic particle beat degree; Described sensing device comprises mangneto piezoelectric transducer, magnetoresistance material sensor or Characteristic of Magneto-Optical fiber sensor.
4. magnetic particle swings an absorbing unit combination device, it is characterized in that, comprises the magnetic particle multiple according to claim 1 placed according to equidirectional placement or multiple directions and swings absorbing unit.
5. magnetic particle according to claim 4 swings absorbing unit combination device, it is characterized in that, described multiple magnetic particle according to claim 1 swings in absorbing unit, and some or all of magnetic particle swings absorbing unit and forms one or more complex group zoarium;
The rotation magnetic particle forming multiple magnetic particles swing absorbing unit of same complex group zoarium is connected on same rotatingshaft.
6. magnetic particle according to claim 4 swings absorbing unit combination device, it is characterized in that, described magnetic particle swings absorbing unit according to array arrangement.
7. magnetic particle according to claim 6 swings absorbing unit combination device, it is characterized in that, magnetic particle to swing between absorbing unit in X Y the arrangement of Z-direction solid array to connect or outside radial array arrangement connects in center.
8. swing an electromagnetic damping power facility for absorbing unit based on magnetic particle according to claim 3, it is characterized in that, there is following arbitrary group or many group technique feature:
The vibration of-controlled device swings the induced current coil of absorbing unit by magnetic particle, vibrational energy is converted into electric energy;
The vibration of-controlled device swings the mangneto piezoelectric transducer of absorbing unit by magnetic particle, vibrational energy is converted into electric energy;
The induced current coil that the vibrational excitation magnetic particle of-controlled device swings absorbing unit produces electrical signal of inducting, and this electrical signal of inducting swings for magnetic particle or the sensing of system vibration state.
9. magnetic particle swings a vibration absorption method, it is characterized in that, comprises step:
The magnetic particle described in claim 1 is utilized to swing absorbing unit, the magnetic fields magnetoelasticity power that the field generator for magnetic making described magnetic particle swing absorbing unit produces is ordered about and is rotated magnetic particle rotation beat to change the torsional stiffness of rotating magnetic particle, makes the shock absorption system natural frequency of described magnetic particle swing absorbing unit and is carried out absorbing by the vibration frequency with same frequency and reversed-phase of vibration isolation object; And/or
The magnetic particle described in claim 4 is utilized to swing absorbing unit combination device, swinging the shock absorption system natural frequency of absorbing unit by adjusting any one or multiple magnetic particle in described magnetic particle swing absorbing unit combination device, realizing the absorbing of the multi-frequency superpositing vibration frequency of controlled device.
10. a magnetic particle swings stiffness tuning method, it is characterized in that, the magnetic particle described in claim 1 is utilized to swing absorbing unit, the magnetic fields that the field generator for magnetic making described magnetic particle swing absorbing unit produces makes magnetic particle swing, magnetic particle is made to be flapped toward magnetic direction, because magnetic particle itself is rigid body, so in this swing process, described magnetic particle swings absorbing unit and can increase gradually at the support stiffness of mass body moving direction, presents maximum rigidity until forward to when overlapping with mass body moving direction; Make described magnetic particle swing absorbing unit load the swing angle of change magnetic particle by electromagnetic force and change the system stiffness that described magnetic particle swings absorbing unit.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105840705A (en) * | 2016-05-06 | 2016-08-10 | 上海交通大学 | Magnetic particle driven shock absorption system |
| CN106483031A (en) * | 2016-10-25 | 2017-03-08 | 杨斌堂 | Twisting vibration test system and combination unit |
| CN108799394A (en) * | 2018-07-23 | 2018-11-13 | 上海交通大学 | Dynamic vibration absorber and bump leveller group's system |
| CN108895208A (en) * | 2018-08-03 | 2018-11-27 | 重庆君道消防安全技术股份公司 | Variable fixed frequency para-seismic support |
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| CN105840705B (en) * | 2016-05-06 | 2018-10-23 | 上海交通大学 | Magnetic particle drives shock absorption system |
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