CN109869435A - A kind of MR damper of more magnetic couple Structure of mover - Google Patents
A kind of MR damper of more magnetic couple Structure of mover Download PDFInfo
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- CN109869435A CN109869435A CN201910293010.1A CN201910293010A CN109869435A CN 109869435 A CN109869435 A CN 109869435A CN 201910293010 A CN201910293010 A CN 201910293010A CN 109869435 A CN109869435 A CN 109869435A
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Abstract
The invention discloses a kind of MR dampers of more magnetic couple Structure of mover, including piston, piston rod and magnetic conduction cylinder barrel；Piston is arranged inside magnetic conduction cylinder barrel, and magnetorheological fluid is filled between piston and magnetic conduction cylinder barrel；The inside of piston is arranged in piston rod, and piston rod is for driving piston rotation or axial movement or rotationally and axially moving simultaneously；When piston rod drives piston rotation, magnetic conduction cylinder barrel and magnetorheological fluid generate the rotation that shearing damp hinders piston；When piston rod drives piston axial movement, magnetic conduction cylinder barrel and magnetorheological fluid generate the axial movement that valve type damping hinders piston；When piston rod band piston rotationally and axially moves simultaneously, magnetic conduction cylinder barrel and magnetorheological fluid generate shearing damp simultaneously and valve type damping hinders rotationally and axially moving for piston.MR damper provided by the invention can provide shearing-type damping and valve type damping simultaneously.
Description
Technical field
The present invention relates to field of vibration control, in particular to a kind of MR damper of more magnetic couple Structure of mover.
Background technique
MR damper has been widely used in numerous vibration damping fields, continues to expand with application field, right
Damping force is big etc. that requirements are gradually increased for MR damper device miniaturization, lightweight and output.Meeting magnetorheological damping
It while device miniaturization, lightweight, high damping force, need to also be innovated in structure, to adapt to more applications.
Magnetic Circuit Design in MR damper is to construct one of the important link of damper, and structure type decides magnetic
The working performance of rheological damper.Damping piston is often designed as I-shaped profile by traditional MR damper, with list
Group or the form of multiple groups coil generate magnetic field, to make magnetorheological fluid that rheology occur.But traditional MR damper cannot
Shearing-type damping and valve type damping are provided simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of MR dampers of more magnetic couple Structure of mover, to provide shearing resistance simultaneously
Buddhist nun and valve type damping, and the eddy current for inhibiting induced electromotive force to generate, reduce influence of the fever to MR damper performance, mention
The adjustable extent of high MR damper.
To achieve the above object, the present invention provides following schemes:
A kind of MR damper of more magnetic couple Structure of mover, the MR damper include piston, piston rod and lead
Magnetic cylinder barrel；
The piston is arranged inside the magnetic conduction cylinder barrel, filled with magnetorheological between the piston and the magnetic conduction cylinder barrel
Liquid；
The inside of the piston is arranged in the piston rod, and the piston rod is for driving the piston rotation or axial shifting
It moves or rotationally and axially moves simultaneously；When the piston rod drives the piston rotation, the magnetic conduction cylinder barrel and the magnetic current
Become liquid and generates the rotation that shearing damp hinders the piston；It is described to lead when the piston rod drives piston axial movement
Magnetic cylinder barrel and the magnetorheological fluid generate the axial movement that valve type damping hinders the piston；When the piston rod drives the work
When plug rotationally and axially moves simultaneously, the magnetic conduction cylinder barrel and the magnetorheological fluid generate shearing damp and valve type damping resistance simultaneously
Hinder rotationally and axially moving for the piston.
Optionally, the piston includes piston body, even number magnet exciting coil；
The piston body includes multiple layer metal soft magnetic materials, and metal soft magnetic material described in multilayer, which is overlapped to fold, falls setting, described
The surface of metal soft magnetic material is coated with insulated paint；
Magnet exciting coil described in even number is wrapped on the piston body；The piston rod is arranged in the piston body
Portion.
Optionally, the metal soft magnetic material includes magnetic conducting inner ring and even number T shape magnetic conduction arm；
T shape magnetic conduction arm described in even number is evenly arranged on the outside of the magnetic guiding loop；
Magnetic conducting inner ring described in multilayer, which is overlapped to fold, falls the hollow cylinder to form piston body；
T shape magnetic conduction arm described in multilayer, which is overlapped to fold, falls the even number T-type solid arm to form piston body；
High magnetic resistance packing material is filled in gap between T-type solid arm described in even number；
Magnet exciting coil described in even number is wrapped in correspondingly on T-type solid arm described in even number；
The inside of the hollow cylinder is arranged in the piston rod.
Optionally, the winding direction of the magnet exciting coil on the adjacent T-type solid arm is opposite.
Optionally, the piston rod includes piston rod leading portion, piston rod middle section, piston rod back segment, first end cover and second
End cap；
The center of the first end cover is provided with first through hole, and the center of the second end cover is provided with second
Through-hole；
The first end cover passes through one end of the piston rod leading portion and the piston rod middle section by the first through hole
It is threadedly coupled；
The second end cover passes through the another of the piston rod back segment and the piston rod middle section by second through-hole
End is threadedly coupled；
The piston is set in the piston rod middle section, and is fixed by the first end cover and the second end cover.
Optionally, the piston rod middle section and the piston rod leading portion are internally provided with hollow structure, the piston
The conducting wire of magnet exciting coil is drawn by the hollow structure.
Optionally, the MR damper further includes sliding electrode；
The sliding electrode includes moving electrode and stationary electrode, and the inside of the stationary electrode is arranged in the moving electrode；
The moving electrode is fixedly mounted on the end of the piston rod leading portion, and the moving electrode is electrically connected with the conducting wire；
The stationary electrode is internally provided with conductiving slide rail；The moving electrode is contacted with the conductiving slide rail, and described
Sliding in conductiving slide rail.
Optionally, the outside of the stationary electrode is additionally provided with insulating layer.
Optionally, the material of the piston rod is non-magnet material.
Optionally, the material of the magnetic conduction cylinder barrel is metal material.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The invention discloses a kind of MR damper of more magnetic couple Structure of mover, the MR damper includes living
Plug, piston rod and magnetic conduction cylinder barrel；The piston is arranged inside the magnetic conduction cylinder barrel, between the piston and the magnetic conduction cylinder barrel
Filled with magnetorheological fluid；The inside of the piston is arranged in the piston rod, and the piston rod is for driving the piston rotation
Or it moves axially or rotationally and axially moves simultaneously；When the piston rod drive the piston rotation when, the magnetic conduction cylinder barrel and
The magnetorheological fluid generates the rotation that shearing damp hinders the piston；When the piston rod drives the piston axial movement
When, the magnetic conduction cylinder barrel and the magnetorheological fluid generate the axial movement that valve type damping hinders the piston；When the piston rod
When driving the piston while rotationally and axially moving, the magnetic conduction cylinder barrel and the magnetorheological fluid generate simultaneously shearing damp and
Valve type damping hinders rotationally and axially moving for the piston.MR damper provided by the invention can provide shearing simultaneously
Formula damping and valve type damping.
Piston body of the invention, which is overlapped to fold using multiple layer metal soft magnetic materials, falls setting, realizes to eddy current fever phenomenon
Inhibit, and because can guarantee that inner piston has enough effective lengths in a limited space, simultaneously because metal soft magnetic material has
There are higher magnetic conductivity and saturation induction density, therefore the damping force and adjustable extent of damper can be improved.
The present invention is also provided with sliding electrode, avoids causing conducting wire generation by losing
Fatigue damage, to conducting wire reinforce protect.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structure chart of the MR damper of more magnetic couple Structure of mover provided by the invention；
Fig. 2 is the structure chart of metal soft magnetic material provided by the invention；
Fig. 3 is a kind of working principle diagram of the MR damper of more magnetic couple Structure of mover provided by the invention；
Fig. 4 is the structure chart of piston rod provided by the invention；
Fig. 5 is the installation diagram of piston rod provided by the invention and piston；
Fig. 6 is the structure chart of sliding electrode provided by the invention.
Specific embodiment
The object of the present invention is to provide a kind of MR dampers of more magnetic couple Structure of mover, to provide shearing resistance simultaneously
Buddhist nun and valve type damping, and the eddy current for inhibiting induced electromotive force to generate, reduce influence of the fever to MR damper performance, mention
The adjustable extent of high MR damper.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Mode is applied to be described in further detail invention.
As shown in Figure 1, the present invention provides a kind of MR damper of more magnetic couple Structure of mover, the MR damper
Including piston 1, piston rod 2 and magnetic conduction cylinder barrel 3；The piston 1 is arranged inside the magnetic conduction cylinder barrel 3, the piston 1 and described
Magnetorheological fluid 4 is filled between magnetic conduction cylinder barrel 3；The inside of the piston 1 is arranged in the piston rod 2, and the piston rod 2 is used for
The piston 1 is driven to rotate or move axially or rotationally and axially move simultaneously；When the piston rod 2 drives 1 turn of the piston
When dynamic, the magnetic conduction cylinder barrel 3 and the magnetorheological fluid 4 generate the rotation that shearing damp hinders the piston 1；When the piston rod
When the 2 drive piston 1 axial movement, the magnetic conduction cylinder barrel 3 and the magnetorheological fluid generate valve type damping and hinder the piston 1
Axial movement.The material of the magnetic conduction cylinder barrel 3 is the metal material of high magnetic permeability.When the piston rod 2 drives the piston 1
When rotationally and axially moving simultaneously, the magnetic conduction cylinder barrel 3 and the magnetorheological fluid 4 generate shearing damp and valve type damping resistance simultaneously
Hinder rotationally and axially moving for the piston 1.
The piston 1 includes piston body 1-1, even number magnet exciting coil 1-2；The piston body 1-1 includes that multiple layer metal is soft
Magnetic material, metal soft magnetic material 5 described in multilayer be overlapped it is folded fall setting, the surface of the metal soft magnetic material 5 is coated with insulated paint；It is even
Several magnet exciting coil 1-2 are wrapped on the piston body 1-1；The piston rod 2 is arranged in the piston body 1-1
Portion.
As shown in Fig. 2, the metal soft magnetic material 5 includes magnetic conducting inner ring 5-1 and even number T shape magnetic conduction arm 5-2；Even number
The T shape magnetic conduction arm 5-2 is evenly arranged on the outside of the magnetic guiding loop 5-1；Magnetic conducting inner ring 5-1 described in multilayer is overlapped to fold and falls to form piston
The hollow cylinder of body 1-1；T shape magnetic conduction arm 5-2 described in multilayer, which is overlapped to fold, falls the even number T-type solid arm to form piston body 1-1；
High magnetic resistance packing material 1-3 is filled in gap between T-type solid arm described in even number；Magnet exciting coil 1-2 described in even number
It is wrapped on T-type solid arm described in even number correspondingly, wherein magnet exciting coil 1-2's on the adjacent T-type solid arm
Winding direction is opposite；The inside of the hollow cylinder is arranged in the piston rod 2.The production of piston body 1-1 of the invention
Journey are as follows: multiple layer metal soft magnetic materials 5 is soaked in insulated paint, the folded completion of metal soft magnetic material 5 is then overlapped form, is passed through
It dries in groups for 100 DEG C, 2 hours.Metal soft magnetic material 5 be overlapped be nested in piston rod middle section do not have threaded smooth bar part area
Domain, magnet exciting coil 1-2 use enameled wire two-wire wound side by side at the card slot on T-type solid arm, several the number of turns lines of continuous winding
Circle.One layer of insulating paper is tied between metal soft magnetic material 5 and magnet exciting coil 1-2.Piston body 1-1 is winding magnet exciting coil 1-
After 2, spare space in piston 1 is filled using high magnetic resistance packing material, so that keeping 1 side profile of piston is complete circle
Cylinder, the outer surface of cylindrical body is using the maximum radius of metal soft magnetic material 5 as the cylindrical surface of radius.
As shown in figure 3, the magnetic line of force inspired is in metal soft magnetic material 5, resistance when aliving in magnet exciting coil 1-2
Closed magnetic circuit is formed in the magnetorheological fluid 4 and magnetic conduction cylinder barrel 3 of Buddhist nun's gap location.Each T shape magnetic conduction arm 5- in metal soft magnetic material 5
2 are designed as even number, due to the difference of magnet exciting coil 1-2 winding direction, can make the magnetic line of force inside each T shape magnetic conduction arm 5-2
Direction is opposite with two adjacent T shape magnetic conduction arms.The state that adjacent T shape magnetic conduction arm 5-2 receives the hair of the magnetic line of force one one is formed,
Wherein one group of T shape magnetic conduction arm 5-2 to top, which is issued, receives the magnetic line of force, then connects to the T shape magnetic conduction arm 5-2 on top for another group
Receive the magnetic line of force.
As shown in Figure 4 and Figure 5, the piston rod 2 includes piston rod leading portion 2-1, piston rod middle section 2-3, piston rod back segment
2-3, first end cover 2-4 and second end cover 2-5；The center of the first end cover 2-4 is provided with first through hole, and described second
The center of end cap 2-5 is provided with the second through-hole；The first end cover 2-4 passes through the piston rod by the first through hole
Leading portion 2-1 is connect with the threaded one end of the piston rod middle section 2-3；The second end cover 2-5 is passed through by second through-hole
The piston rod back segment 2-3 is threadedly coupled with the other end of the piston rod middle section 2-3；The piston is set in the piston rod
Middle section 2-3, and fixed by the first end cover 2-4 and the second end cover 2-5.The piston rod middle section 2-3 and the work
Stopper rod leading portion 2-1's is internally provided with hollow structure, and the conducting wire of the magnet exciting coil 1-2 of the piston 1 passes through the hollow structure
It draws.The material of the piston rod 2 is non-magnet material.
As shown in fig. 6, the MR damper further includes sliding electrode；The sliding electrode includes moving electrode and electrostatic
The inside of the stationary electrode is arranged in pole, the moving electrode；The moving electrode is fixedly mounted on the end of the piston rod leading portion 2-1
Portion, the moving electrode are electrically connected with the conducting wire；The stationary electrode is internally provided with conductiving slide rail；The moving electrode with it is described
Conductiving slide rail 6 contacts, and slides in the conductiving slide rail, and the conductiving slide rail is also connect with external power supply.The stationary electrode
Outside be additionally provided with insulating layer 7.Sliding electrode of the invention can keep all conducting wires in damper operation in static
Motionless state reduces the fatigue damage of conducting wire.
Technical effect of the invention is derived by following procedure:
The derivation process of total damping power F expression formula is as follows:
If the clearance height between two plates is h, width b, the speed of related movement of two-plate is v, the pressure of board ends
Difference is Δ P, appoints the one-dimensional laminar flow plane for taking plate width direction, establishes rectangular coordinate system.When no magnetic fields, magnetorheological fluid
Newton incompressible viscous fluid can be regarded as, null field viscosity is η 0, density ρ, receives dimension-Stokes (N-S) by hydrodynamics
Equation can list equation group:
It, can be by formula (1) abbreviation according to constant flow in hydrodynamics and incompressible flow volume property are as follows:
Since pressure P is only the function of coordinate x, i.e., pressure only changes along x coordinate axis direction, then can be by formula (2) the
One column formula is rewritten into total derivative form:
To (3) formula indefinite integral twice, the functional relation of fluid flow rate Yu clearance height coordinate y is obtained:
In shear mode, according to the boundary condition in shear mode model, the spy in shear mode following formula (4) can be obtained
Solution:
Under magnetic fields, the constitutive relationship of Bingham body are as follows:
The raw damping force F of magnetorheological fluid parallel shear flow movable property can be obtained in the relationship for obtaining shear stress and active forcesAre as follows:
In valve type mode, having the pressure difference of board ends is Δ P and magnetic flux changing liquid shear yield strength τ s relationship:
There is the damping force F v expression formula of valve type magneto-rheological damper:
Obtain shearing valve type magneto-rheological damper total damping power Fsv are as follows:
Metal soft magnetic material curved surface radian summation item α is introduced in the total damping power F expression formula (10) of the design scheme,
Expression formula are as follows:
In formula:
η is the viscosity of the magnetorheological fluid；L is the length of piston in the axial direction；D is the interior diameter of magnetic conduction cylinder barrel；For work
The movement velocity of plug；τsFor the shear yield strength of the magnetorheological fluid；A is the effective cross section product of magnetic guiding jar inner cavity；H is to lead
The gap thickness of magnetic inner cavity of cylinder and T shape magnetic couple metal soft magnetic material cambered surface.
The present invention provides a kind of MR damper for being equipped with more magnetic couple metal soft magnetic materials, can provide simultaneously shearing
Damping and valve type damping, and by design magnetic circuit and assembly technology, the eddy current that induced electromotive force generates effectively is inhibited, substantially
Degree reduces influence of the fever to MR damper performance.Piston effective length is improved simultaneously in the accounting of piston total length,
Specific gravity of the Coulomb damping power in total damping power is further increased, the adjustable extent of MR damper is improved.When long
Between, under high-frequency damped motion, conducting wire can be kept not by fatigue damage.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific examples are used herein to describe the principles and implementation manners of the present invention, the explanation of above embodiments
Method and its core concept of the invention are merely used to help understand, described embodiment is only that a part of the invention is real
Example is applied, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of MR damper of more magnetic couple Structure of mover, which is characterized in that the MR damper includes piston, work
Stopper rod and magnetic conduction cylinder barrel；
The piston is arranged inside the magnetic conduction cylinder barrel, and magnetorheological fluid is filled between the piston and the magnetic conduction cylinder barrel；
The piston rod is arranged in the inside of the piston, the piston rod for drive the piston rotation or axial movement or
It rotationally and axially moves simultaneously；When the piston rod drives the piston rotation, the magnetic conduction cylinder barrel and the magnetorheological fluid
Generate the rotation that shearing damp hinders the piston；When the piston rod drives piston axial movement, the magnetic guiding jar
Cylinder and the magnetorheological fluid generate the axial movement that valve type damping hinders the piston；When the piston rod drives the piston same
When rotationally and axially moving, the magnetic conduction cylinder barrel and magnetorheological fluid generates shearing damp simultaneously and valve type damping hinders institute
State rotationally and axially moving for piston.
2. a kind of MR damper of more magnetic couple Structure of mover according to claim 1, which is characterized in that the piston
Including piston body, even number magnet exciting coil；
The piston body includes multiple layer metal soft magnetic materials, and metal soft magnetic material described in multilayer, which is overlapped to fold, falls setting, the metal
The surface of soft magnetic materials is coated with insulated paint；
Magnet exciting coil described in even number is wrapped on the piston body；The inside of the piston body is arranged in the piston rod.
3. a kind of MR damper of more magnetic couple Structure of mover according to claim 2, which is characterized in that the metal
Soft magnetic materials includes magnetic conducting inner ring and even number T shape magnetic conduction arm；
T shape magnetic conduction arm described in even number is evenly arranged on the outside of the magnetic guiding loop；
Magnetic conducting inner ring described in multilayer, which is overlapped to fold, falls the hollow cylinder to form piston body；
T shape magnetic conduction arm described in multilayer, which is overlapped to fold, falls the even number T-type solid arm to form piston body；
High magnetic resistance packing material is filled in gap between T-type solid arm described in even number；
Magnet exciting coil described in even number is wrapped in correspondingly on T-type solid arm described in even number；
The inside of the hollow cylinder is arranged in the piston rod.
4. a kind of MR damper of more magnetic couple Structure of mover according to claim 3, which is characterized in that adjacent described
The winding direction of magnet exciting coil on T-type solid arm is opposite.
5. a kind of MR damper of more magnetic couple Structure of mover according to claim 1, which is characterized in that the piston
Bar includes piston rod leading portion, piston rod middle section, piston rod back segment, first end cover and second end cover；
The center of the first end cover is provided with first through hole, and it is logical that the center of the second end cover is provided with second
Hole；
The first end cover passes through the threaded one end of the piston rod leading portion and the piston rod middle section by the first through hole
Connection；
The second end cover passes through the other end spiral shell of the piston rod back segment and the piston rod middle section by second through-hole
Line connection；
The piston is set in the piston rod middle section, and is fixed by the first end cover and the second end cover.
6. a kind of MR damper of more magnetic couple Structure of mover according to claim 5, which is characterized in that the piston
Bar middle section and the piston rod leading portion are internally provided with hollow structure, and the conducting wire of the magnet exciting coil of the piston is by described
Hollow structure is drawn.
7. a kind of MR damper of more magnetic couple Structure of mover according to claim 6, which is characterized in that the magnetic current
Variable damping device further includes sliding electrode；
The sliding electrode includes moving electrode and stationary electrode, and the inside of the stationary electrode is arranged in the moving electrode；
The moving electrode is fixedly mounted on the end of the piston rod leading portion, and the moving electrode is electrically connected with the conducting wire；
The stationary electrode is internally provided with conductiving slide rail；The moving electrode is contacted with the conductiving slide rail, and in the conduction
Sliding in sliding rail.
8. a kind of MR damper of more magnetic couple Structure of mover according to claim 7, which is characterized in that the electrostatic
The outside of pole is additionally provided with insulating layer.
9. a kind of MR damper of more magnetic couple Structure of mover according to right 1, which is characterized in that the piston rod
Material is non-magnet material.
10. a kind of MR damper of more magnetic couple Structure of mover according to claim 1, which is characterized in that described to lead
The material of magnetic cylinder barrel is metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293010.1A CN109869435B (en) | 2019-04-12 | 2019-04-12 | Magneto-rheological damper with multi-magnetic couple rotor structure |
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|---|---|---|---|
| CN201910293010.1A CN109869435B (en) | 2019-04-12 | 2019-04-12 | Magneto-rheological damper with multi-magnetic couple rotor structure |
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| CN109869435B CN109869435B (en) | 2021-08-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112923001A (en) * | 2021-01-29 | 2021-06-08 | 中国劳动关系学院 | Circumferential excitation magnetorheological damper |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
| CN115013469A (en) * | 2022-06-09 | 2022-09-06 | 北京金茂人居环境科技有限公司 | Radial magnetorheological damping broadband vibration isolator |
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| CN109210104A (en) * | 2018-08-31 | 2019-01-15 | 恒有（苏州）精工机电有限公司 | A kind of coil arragement construction increasing magnetic rheological clutch dynamic controlled range |
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| RU2084721C1 (en) * | 1994-12-15 | 1997-07-20 | Владимир Владимирович Войкин | Hydraulic shock-absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112923001A (en) * | 2021-01-29 | 2021-06-08 | 中国劳动关系学院 | Circumferential excitation magnetorheological damper |
| CN112963489A (en) * | 2021-04-07 | 2021-06-15 | 重庆大学 | Multi-channel multi-degree-of-freedom magnetorheological damper based on porous composite material |
| CN115013469A (en) * | 2022-06-09 | 2022-09-06 | 北京金茂人居环境科技有限公司 | Radial magnetorheological damping broadband vibration isolator |
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| Publication number | Publication date |
|---|---|
| CN109869435B (en) | 2021-08-27 |
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