CN101519111B - Magneto-rheological elastomer intelligent damper for ship - Google Patents
Magneto-rheological elastomer intelligent damper for ship Download PDFInfo
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- CN101519111B CN101519111B CN2009100717085A CN200910071708A CN101519111B CN 101519111 B CN101519111 B CN 101519111B CN 2009100717085 A CN2009100717085 A CN 2009100717085A CN 200910071708 A CN200910071708 A CN 200910071708A CN 101519111 B CN101519111 B CN 101519111B
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- iron core
- inner iron
- elastic body
- magneto
- rheology elastic
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Abstract
The invention provides a magneto-rheological elastomer intelligent damper for a ship, comprising a shell, a magneto-rheological elastomer, an electromagnetic coil assembly and an inner iron core, wherein the shell, the magneto-rheological elastomer and the inner iron core are cylinders and have the same center; the magneto-rheological elastomer is connected between the shell and the inner iron core, and the electromagnetic coil assembly is fixed on the inner iron core. The damper has a frequency range of application from several Hzs to dozens of Hzs, is suitable for a frequency band variation range of the excitation of a ship mainframe and has obviously damping effect on the excitation of typical equipment (such as electromechanical equipment, various pumps, and the like) on the ship.
Description
(1) technical field
What the present invention relates to is a kind of vibration and noise reducing device, specifically a kind of vibration reduction of ship noise reducing apparatus based on magnetic rheology elastic body.
(2) background technology
The normal vibration damping equipment that uses mainly is elastic damping element on the boats and ships, and as spring, rubber pad etc., the energy dissipation in motion process suppresses structural vibration to these damping elements by rubber or spring.Advantages such as that such vibration damping equipment has is simple in structure, be easy to realize, economical, reliable, but because its construction parameter is set in a certain specific environment optimization, and this parameter just can't change once setting, the alerting ability on shortage is controlled.Therefore, study and seek rationally, economy and actv. ship structure damping element has important theory and practical significance for improving the Ship Vibration controlling level.
Magnetic rheology elastic body (MR elastomers) is new branch of magnetorheological materials.It is made up of high molecular polymer (as rubber etc.) and ferromagnetic particle, the poly-mer that is mixed with ferromagnetic particle solidifies under the externally-applied magnetic field effect, utilizes magnetic effect (being that ferromagnetic particle forms chain or column aggregated structure at magnetic direction) to make particle form ordered structure in matrix.
When magnetic rheology elastic body is applied to mechanical vibration damping, can control elastomeric rigidity and damping coefficient.The groundwork of magnetic rheology elastic body is the magnetic-field intensity of control elastic body region, and then changes the mangneto modulus of shearing of magnetic rheology elastic body, finally regulates the rigidity and the damping coefficient of magnetic rheology elastic body.Increase the magnetic-field intensity of magnetic rheology elastic body region, the corresponding increase of the rigidity of magnetic rheology elastic body and damping coefficient.
Find through literature search prior art, in recent years, existing people utilizes the material behavior of magnetic rheology elastic body to design shock attenuation unit, it as Chinese patent application number is disclosed technical scheme in 200520070319 the patent document, utilize a kind of damper of magnetic rheology elastic body development, be applied in the single-degree of freedom vibration structure of mechanical equipment, but because complex structure, the exert oneself shortcoming of DeGrain has certain limitation.And Chinese patent application number is a disclosed technical scheme in 200620154712 the patent document, has proposed a kind of rotor control and has used the magnetic rheology elastic body damper, only is applicable to rotor oscillation control problem, has limited the widespread use of this damper.
(3) summary of the invention
The object of the present invention is to provide a kind of damping and controllable stiffness, can under marine main engine oscillation frequency change condition, realize the magneto-rheological elastomer intelligent damper for ship of active damping.
The object of the present invention is achieved like this:
Magneto-rheological elastomer intelligent damper for ship of the present invention is made up of housing, magnetic rheology elastic body, magnet coil group and inner iron core four parts, described housing, magnetic rheology elastic body, inner iron core are cylinder and have the concyclic heart, magnetic rheology elastic body is connected between housing and the inner iron core, and the magnet coil group is fixed on the inner iron core.
The present invention can also comprise some architectural features like this:
1, described inner iron core comprises four wings, and corresponding magnet coil has four groups, and every group of coil is wrapped on the wing of inner iron core, and coil adopts and twines along the cylinder generatrix direction.
2, described housing, inner iron core are made by soft iron magnetic material.
3, the main constituent of described magnetic rheology elastic body comprises as the rubber-like damping material of basis material and disperses wherein carbonyl iron dust (the shared volume concentration ratio of carbonyl particle 30%).
4, the corresponding center of circle of each wing of described inner iron core angle is 60 degree, and the transition of quadrntnt arc is adopted in the structure junction, and inner iron core is fan-shaped the connection with the magnetic rheology elastic body contact surface.
With respect to existing vibration damping equipment, the version of magnetic rheology elastic body damper peculiar to vessel has following characteristics:
1, coil adopts unique canoe.The existing magnetic rheology elastic body equipment canoes that adopt along the structure circumferencial direction more, and this patent adopts the winding method along the cylinder generatrix direction.
2, inner iron core adopts fan-shaped the connection with the magnetic rheology elastic body contact surface, shown in Fig. 5 (a).Inner iron core comprises 4 wings, and the corresponding center of circle of each wing angle is 60 degree, and the transition of quadrntnt arc is adopted in the structure junction.
3, inner iron core, magnetic rheology elastic body, housing constitute flux loop, shown in Fig. 5 (b).Flux loop can be regulated by electric current inflow direction in the change magnet coil group.
The principle of work of magneto-rheological elastomer intelligent damper for ship is: when electric current flows through magnet coil, form magnetic field in inner iron core, magnetic rheology elastic body and housing region, can control the magnetic-field intensity of magnetic rheology elastic body region by changing electric current, the mangneto modulus of shearing of magnetic rheology elastic body depends on the region magnetic-field intensity, the rigidity and the damping of mangneto modulus of shearing decision magnetic rheology elastic body.Said process can be reduced to the rigidity and the damping change of current control magnetic rheology elastic body in the magnet coil.
During application magneto-rheological elastomer intelligent damper for ship is connected on marine main engine and the load-carrying element, vibration to marine main engine is analyzed, by control to size of current, vibration damping equipment is provided the magnetic-field intensity of quick, correct adjusting magnetic rheology elastic body region, and then the rigidity and the damping of change damper, reach maximum vibration damping purpose.
The frequency Applicable scope of damper of the present invention be several hertz to tens of hertz, be applicable to the frequency band variation range of marine main engine exciting, the exciting of boats and ships exemplary apparatus (as electromechanical appliance, all kinds of pumps etc.) is had tangible effectiveness in vibration suppression.With respect to existing vibration damping equipment, the present invention has the following advantages:
1, the present invention can regulate the damping and the rigidity of damper by changing electric current according to the vibration situation.
2, coil adopts along the cylinder generatrix direction and twines, and has reduced the loss of magnetic field in the structure transmittance process.
3, adopt fan-shaped the connection between inner iron core and the magnetic rheology elastic body, increased the contact surface area, exerting oneself of damper becomes linear dependence with area of contact simultaneously.
4, coil canoe of this patent uniqueness, and inner iron core and magnetic rheology elastic body adopt fan-shaped connection mode, and these all make exerting oneself of this patent damper become big.
5, this patent utilizes the magnetic rheology elastic body technology, has the advantage of magnetic rheology elastic body: magnetic rheology elastic body damping and rigidity are adjustable, the response is fast, good reversibility, have magnetorheological materials and elastomeric advantage concurrently.
(4) description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of magnet coil group and inner iron core;
Fig. 3 is the birds-eye view of Fig. 2;
Fig. 4 is a contour structures scheme drawing of the present invention;
Fig. 5 (a) is the fan-shaped contact structures scheme drawing of inner iron core and magnetic rheology elastic body;
Fig. 5 (b) is the damper flux loop.
(5) specific embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1-Fig. 4, magneto-rheological elastomer intelligent damper for ship is made up of housing 1, magnetic rheology elastic body 2, magnet coil group 4 and inner iron core 3 four parts, by magnetic rheology elastic body housing and inner iron core are coupled together, the magnet coil group is fixed on the inner iron core.Described housing, magnetic rheology elastic body, inner iron core are cylinder, and the concyclic heart of said structure.Described inner iron core comprises four wings, and corresponding magnet coil has four groups, and every group of coil is wrapped on the wing of inner iron core.Coil adopts the winding method along the cylinder generatrix direction.Inner iron core adopts fan-shaped the connection with the magnetic rheology elastic body contact surface.Inner iron core comprises 4 wings, and the corresponding center of circle of each wing angle is 60 degree, and the transition of quadrntnt arc is adopted in the structure junction.Described housing, inner iron core are soft iron magnetic material.Described magnetic rheology elastic body belongs to a kind of of magnetorheological materials, is the intellectual material that a kind of damping and rigidity are subjected to externally-applied magnetic field control, and its main constituent comprises as the rubber-like damping material of basis material and dispersion carbonyl iron dust (ferromagnetic particle) wherein.Have bolt hole 6 on the housing.Have lead screw 5 on the inner iron core.
Be based on solving the vibration damping problem on the boats and ships vertical direction, designed a kind of novel damper that is applicable to boats and ships exemplary apparatus (as electromechanical appliance, all kinds of pumps etc.) vibration damping.
Magneto-rheological elastomer intelligent damper for ship will be applied in the vibration reduction of ship, should analyze the vibration of marine main engine earlier, draws the damper performance demands.According to performance requriements, determine the correlation parameter of damper.Simultaneously, the magnetization of the feasibility of consideration scantling of structure and electric current is to the influence of marine equipment.Final definite, the damper structure size: height is 300mm; The housing external diameter is 220mm, and internal diameter is 205mm; The elastic body external diameter is 205mm, and internal diameter is 165mm; Magnet coil group coil total number of turns is 4800 circles.The electric current variation range is 0～3A.
During practical application, magneto-rheological elastomer intelligent damper for ship is connected in the ship structure, lead screw 5 is linked to each other with marine main engine, utilize bolt hole 6 that damper is fixed on the load-carrying element, damper is fixed on the boats and ships, can be according to the vibration situation of main frame, electric current is regulated, change the magnetic-field intensity of elastic body region, the size of control damper dumping force reaches maximum effectiveness in vibration suppression.
Claims (3)
1. magneto-rheological elastomer intelligent damper for ship, form by housing, magnetic rheology elastic body, magnet coil group and inner iron core four parts, it is characterized in that: described housing, magnetic rheology elastic body, inner iron core are cylinder and have the concyclic heart, magnetic rheology elastic body is connected between housing and the inner iron core, and the magnet coil group is fixed on the inner iron core; Described inner iron core comprises four wings, and corresponding magnet coil has four groups, and every group of coil is wrapped on the wing of inner iron core, and coil adopts and twines along the cylinder generatrix direction; The corresponding center of circle of each wing of described inner iron core angle is 60 degree, and the transition of quadrntnt arc is adopted in the structure junction, and inner iron core is fan-shaped the connection with the magnetic rheology elastic body contact surface.
2. magneto-rheological elastomer intelligent damper for ship according to claim 1 is characterized in that: described housing, inner iron core are made by soft iron magnetic material.
3. magneto-rheological elastomer intelligent damper for ship according to claim 1 and 2, it is characterized in that: the main constituent of described magnetic rheology elastic body comprises as the rubber-like damping material of basis material and dispersion carbonyl iron dust wherein, 30% of the shared volume concentration ratio of carbonyl particle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100717085A CN101519111B (en) | 2009-04-03 | 2009-04-03 | Magneto-rheological elastomer intelligent damper for ship |
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| CN2009100717085A CN101519111B (en) | 2009-04-03 | 2009-04-03 | Magneto-rheological elastomer intelligent damper for ship |
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| CN101519111A CN101519111A (en) | 2009-09-02 |
| CN101519111B true CN101519111B (en) | 2010-12-01 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101724747B1 (en) * | 2011-11-23 | 2017-04-10 | 현대자동차주식회사 | Variable differential mount system applied Magnetorheological Elastomer |
| CN102878237B (en) * | 2012-10-23 | 2014-12-24 | 上海交通大学 | Combined intelligent magnetorheological elastomer vibration absorber for ship shafting longitudinal vibration |
| CN104479095A (en) * | 2014-11-13 | 2015-04-01 | 哈尔滨工程大学 | Rigidity-adjustable grafted polyurethane matrix composite damping material and preparation method thereof |
| CN105864352B (en) * | 2016-04-29 | 2018-06-08 | 武汉理工大学 | A kind of marine drive shafting Electromagnetic heating damping unit |
| CN106864686B (en) * | 2017-03-21 | 2018-05-18 | 哈尔滨工程大学 | Using the top riser stretcher and its control system of big stroke magnetorheological damper |
| CN107606026B (en) * | 2017-08-16 | 2019-08-30 | 洛阳理工学院 | It is a kind of to open up frequency bump leveller and its control method based on intelligent stiffness elements |
| CN108528631B (en) * | 2018-05-23 | 2024-01-26 | 武汉麦康德设备有限公司 | Five-bucket stacked pump set vibration isolation base for ship |
| CN110802632A (en) * | 2019-11-11 | 2020-02-18 | 北京邮电大学 | Intelligent variable-rigidity flexible joint and flexible robot system |
| CN114940109B (en) * | 2022-06-23 | 2024-02-13 | 天津大学 | Multidimensional vibration reduction seat |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842078Y (en) * | 2005-10-15 | 2006-11-29 | 中国科学技术大学 | Magnetic rheological elastomer frequency shift attenuator |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842078Y (en) * | 2005-10-15 | 2006-11-29 | 中国科学技术大学 | Magnetic rheological elastomer frequency shift attenuator |
Non-Patent Citations (3)
| Title |
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| JP特开昭59-128003A 1984.07.24 |
| 姚静静等.非离子表面活性剂修饰对磁流变弹性体磁流变效应的影响.中国科学技术大学学报.2008,第38卷(第6期), * |
| 魏冰等.聚氨酯基磁流变弹性体.第五届全国电磁流变液及其应用学术会议.2008, * |
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