CN207454650U - A kind of combined type MR vibration damper - Google Patents
A kind of combined type MR vibration damper Download PDFInfo
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- CN207454650U CN207454650U CN201721516959.6U CN201721516959U CN207454650U CN 207454650 U CN207454650 U CN 207454650U CN 201721516959 U CN201721516959 U CN 201721516959U CN 207454650 U CN207454650 U CN 207454650U
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- piston
- permanent magnet
- coil
- magnetorheological
- piston rod
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Abstract
The utility model is related to a kind of combined type MR vibration dampers, include cylinder body, end cap, piston rod, piston, magnetorheological fluid, coil and permanent magnet；Wherein：Cylinder body is separated into magnetorheological chamber and magnetic suspension chamber, and being filled towards in the magnetorheological chamber of openend has magnetorheological fluid；Piston includes upper piston body and lower piston body, locks respectively on the piston rod, there are gaps between upper and lower piston body and cylinder body；Coil includes coil and lower coil, and coil locks on the piston rod of magnetorheological intracavitary, and is close to upper piston body；Lower coil locks on the piston rod of magnetic suspension intracavitary, and is close to lower piston body；Permanent magnet includes upper permanent magnet and lower permanent magnet, and upper permanent magnet locking is close to lower piston body in piston rod end, and lower permanent magnet is directly pull-in on the bottom of cylinder body；Upper and lower permanent magnets same polarity is opposite, and magnetic suspension force is formed by upper, permanent magnet；Realize magnetic suspension and it is magnetorheological be combined, meet different operating mode needs, be optimal damping purpose.
Description
Technical field：
The utility model belongs to magnetorheological cushion technique field, more particularly to a kind of combined type MR vibration damper.
Background technology：
Magnetorheological fluid belongs to controlled fluid, is a kind of soft substance of the intelligence that can change material property, by high magnetic permeability,
The suspended substance that low hysteresis molecule and non-magnetic liquid mix.The rheology of fluid under the action of external magnetic field
Property is undergone mutation, and is cured rapidly and is lost flowability.The principle is also widely used in field of shock absorption.It is generated by coil merely
The scheme in magnetic field, because its magnetic field intensity is limited, the damping force adjustable range of generation is smaller, and the rigidity of damper is non-adjustable
Section, effectiveness in vibration suppression are limited.For this purpose, the compound scheme of permanent magnet is introduced, more flexibility.Such as, number of patent application
201621200604.1, a kind of magnetic rheology elastic body damper is disclosed, including be axially connected together buffer beam, inner sleeve and
Pedestal, the buffer beam are extended into inner sleeve, between the buffer beam and pedestal in the inner sleeve it is axial arranged have piezo electric module and
Damping modules, the Damping modules are mainly by axial arranged upper permanent magnet, upper magnetic rheology elastic body, ferromagnet, lower magnetic together
Magnetorheological elastomer and lower set of permanent magnets into, which is disposed with coil, the both ends of the coil respectively with piezo electric module
Connection.The technology coil generates adjustable high-intensity magnetic field by ferromagnet, not only can generate magnetic suspension with upper and lower permanent magnet but also can make
It is magnetorheological, but consume energy always, and need to be by spring pre-tightening.For this purpose, design magnetic suspension and magneto-rheological combined scheme, become this
The object of utility model research.
The content of the invention：
The purpose of this utility model is that a kind of cylinder body separation of design has magnetic suspension chamber and magnetorheological chamber, utilizes magnetic suspension and magnetic
The combined type MR vibration damper that rheology combines.
What technical solutions of the utility model were realized in：
A kind of combined type MR vibration damper includes cylinder body, end cap, piston rod, piston, magnetorheological fluid, coil and forever
Magnet；It is characterized in that：
Cylinder body is separated into two autonomous working chambers by floating valve body, towards openend be magnetorheological chamber, bottom is magnetic suspension
Chamber, filling in magnetorheological chamber has magnetorheological fluid；
Piston rod into hierarchic structure, is axially provided with lead channels, and sequentially passes through end cap and floating valve body, keeps close
Seal slide construction；
Piston including upper piston body and lower piston body, locks on the piston rod respectively, and upper piston body is in magnetorheological chamber
Interior, lower piston body is in magnetic suspension intracavitary；It is upper and lower that there are gaps between piston body and cylinder body；
Coil, including coil and lower coil, coil locks on the piston rod of magnetorheological intracavitary, and is close to work
Cock body；Lower coil locks on the piston rod of magnetic suspension intracavitary, and is close to lower piston body；Upper and lower coil lead is through on piston rod
Lead channels draw, and independent control；
Permanent magnet, including upper permanent magnet and lower permanent magnet, upper permanent magnet locking is close to lower piston in piston rod end
Body, lower permanent magnet are directly pull-in on the bottom of cylinder body；Upper and lower permanent magnets same polarity is opposite, and magnetic suspension is formed by upper, permanent magnet
Power.
The floating valve body is provided with sealing figure in magnetorheological chamber one side, position of the floating valve body in cylinder body can on float downward
It is dynamic；Floating valve body and sealing ring are exhausted magnetic material.
The magnetic suspension intracavitary has filled gases at high pressure.
The upper permanent magnet is in lower piston body lower face, lower coil is arranged on the upper surface of lower piston body.
The utility model damper uses magnetic suspension and magnetorheological combination, can both overcome general semi-active damper rigidity
The problem that cannot be adjusted, while can also avoid the problem that active damper energy consumption is larger, according to the duty requirements of equipment, sheet
Damper can work under " passive " " half actively " operating mode different from " active ", and comprehensive performance is more excellent.
Description of the drawings：
The utility model is described further with reference to specific legend：
Fig. 1 is combined type MR vibration damper
Wherein
1-cylinder body, 11-floating valve body 12-magnetorheological 13-magnetic suspension of chamber chamber
14-sealing ring, 2-end cap, 21-oil sealing, 22-guide sleeve
3-piston rod, 31-lead channels, 4-piston, 41-upper piston body
42-lower piston body 5-coil, 51-coil, 52-lower coil
6-permanent magnet 61-upper permanent magnet 62-7-magnetorheological fluid of lower permanent magnet
Specific embodiment：
With reference to Fig. 1, combined type MR vibration damper includes cylinder body 1, end cap 2, piston rod 3, piston 4, coil 5, forever
Magnet 6 and magnetorheological fluid 7.
Cylinder body 1 is separated into two autonomous working chambers by floating valve body 11, towards openend be magnetorheological chamber 12, bottom is magnetic
Suspension chamber 13, filling in magnetorheological chamber 12 has magnetorheological fluid 7；Openend is formed by end cap 2 and sealed, in end cap 2 and cylinder body 1
Between, 22 grade attachmentes of oil sealing 21 and piston rod guide sleeve can be also set, and floating valve body 11 is in magnetorheological 12 one side of chamber, also
Sealing ring 14 is provided with, plays the role of clearance seal, while allowing the slip of piston rod 3, floating valve body 12 and sealing ring 14
It puts, can also be fluctuated according to magnetorheological 12 pressure change of chamber due to the volume and pressure change of magnetorheological fluid 7, magnetic suspension
Gases at high pressure in chamber 13 play compensating action.Floating valve body 12 and sealing ring 14 are exhausted magnetic material.
Piston rod 3, into hierarchic structure, so as to components such as reliable location pistons, axial direction is provided with lead channels 31, for
Coil wire is drawn；It sequentially passes through end cap 2 and floating valve body 11 and oil sealing 21 and guide sleeve 22, and sealing is kept to slide knot
Structure.
Piston 4 including upper piston body 41 and lower piston body 42, locks on piston rod 3 respectively, and upper piston body 41 is in magnetic
Rheology chamber 12 is interior, lower piston body 42 is in magnetic suspension chamber 13；It is upper and lower that there are gaps between piston body 41,42 and cylinder body 1；This
A gap can be that 4 bore of piston is less than 1 internal diameter of cylinder body, form edge gap or open up notch at 4 edge of piston, formed
Clearance channel.
Coil 5, including coil 51 and lower coil 52, on the piston rod 3 that coil 51 locks in magnetorheological chamber 12,
And it is close to upper piston body 41；On the piston rod 3 that lower coil 52 locks in magnetic suspension chamber 13, and it is close to the upper of lower piston body 42
End face；Upper and lower coil 51,52 leads are drawn through the lead channels 31 on piston rod 3, and can independent control.
Permanent magnet 6, including upper permanent magnet 61 and lower permanent magnet 62, upper permanent magnet 61 locks in 3 end of piston rod, and is close to
Lower piston body 42, is the lower face for being close to lower piston body 42 more specifically；Lower permanent magnet 62 is directly pull-in on cylinder body 1
Bottom；Upper and lower permanent magnet 61,62 same polarities are opposite, and magnetic suspension force is formed by upper, permanent magnet 61,62.In order to provide magnetic suspension
Damping, in magnetic suspension chamber 13 fill have gases at high pressure, preferably inert gas, when piston compresses, also function to volume compensation
Effect.
Above-mentioned piston rod 3, piston 4 using the small mild steel of the big magnetic resistance of magnetic flux, coil encircling on piston rod 3 and
Corresponding piston is fixed together.Magnetorheological fluid gap is formed between piston 41 and cylinder barrel 1, increases shearing damp power.Piston
42 auxiliary fixed permanent magnets 61, and the magnetic field intensity superposition that can play the magnetic induction intensity and permanent magnet of the generation of coil 52 is made
With.
Combined type MR vibration damper working method：
To apply on road roller, exemplified by level-one damping, illustrate this damper in " passive ", " half actively " and " master
It is dynamic " it works under three kinds of operating modes.
When in coil 51 and lower coil 52 without electric current by when, at this time damper under " passive " operating mode,
Under steel wheel equilibrium state, displacement zero, speed zero, the repulsion between lower permanent magnet 62 and upper permanent magnet 61 is just equal to vehicle
The gravity of frame, damping force zero.When road roller is impacted be subject to external Uneven road, lower permanent magnet 62 and upper permanent magnet 61 it
Between generate relative displacement, the effect of repulsion makes it have the trend for returning to equipoise.Without outside energy under this operating mode
Input, damping property are general.
When being passed through electric current in only coil 51, damper, which is in, at this time damps adjustable " half actively " working condition
Under, by changing the size of electric current, change the magnetic induction intensity of surrounding, so as to change the viscosity characteristics of magnetorheological fluid 7, realize resistance
Buddhist nun is adjustable.Alternatively, when being only passed through electric current in lower coil 52, damper is in adjustable " half actively " the work shape of rigidity at this time
State by changing the size of electric current, makes lower coil 52 generate induced field, the magnetic field and the magnetic field that upper permanent magnet 61 generates are same
To magnetic field intensity superposition makes repulsion size between permanent magnet 61 and lower permanent magnet 62 change, can according to formula F=kx
Know, work as shift invariant, the increase of elastic force is the increase due to spring rate, i.e., shock absorber system rigidity at this time becomes larger, from
And the rigidity for realizing damper is adjustable.The input of outside energy is needed under this working condition, suspension property is more excellent.
When in coil 51 and lower coil 52, when being passed through electric current, damper is under the operating mode of " active " at this time.
When needing to provide greater stiffness, increase the electric current in lower coil 52, make its generation and upper permanent magnet 61 magnetic field in the same direction, at this time
The induced field of lower coil 52 and the magnetic field of upper permanent magnet 61 are overlapped mutually, therefore between upper permanent magnet 61 and lower permanent magnet 62
Repulsion increases, i.e., the rigidity of damper becomes larger at this time.When needing to provide smaller rigidity, the electricity in lower coil 52 can be changed
Stream makes it generate the magnetic field opposite with upper permanent magnet 61, and upper repulsion between permanent magnet 61 and lower permanent magnet 62 reduces at this time, this
When damper rigidity reduce.Realize that the rigidity of suspension is controllable with this.Change the electric current in coil 51, so as to change coil
The magnetic induction intensity of 51 surrounding magnetic fields so that 7 viscosity characteristics of magnetorheological fluid change, and realize that damping is controllable.Wherein 51 He of coil
It can influence each other between lower coil 52, it is possible to increase the magnetic field intensity at magnetorheological fluid 7 increases the viscosity change model of magnetorheological fluid 7
It encloses, realizes the more wide adjusting range of damping.Combine adjusting of the damper stiffness with damping is carried out according to the operating mode of road roller, is obtained
Preferable anti-vibration performance.Extraneous higher-energy is needed to input under this operating mode, suspension property is optimal.
Claims (4)
1. a kind of combined type MR vibration damper, includes cylinder body, end cap, piston rod, piston, magnetorheological fluid, coil and permanent magnetism
Body；
It is characterized in that：
Cylinder body is separated into two autonomous working chambers by floating valve body, towards openend be magnetorheological chamber, bottom is magnetic suspension chamber, magnetic
Being filled in rheology chamber has magnetorheological fluid；
Piston rod into hierarchic structure, is axially provided with lead channels, and sequentially passes through end cap and floating valve body, and sealing is kept to slide
Dynamic structure；
Piston including upper piston body and lower piston body, locks on the piston rod respectively, upper piston body be in magnetorheological intracavitary, under
Piston body is in magnetic suspension intracavitary；It is upper and lower that there are gaps between piston body and cylinder body；
Coil, including coil and lower coil, coil locks on the piston rod of magnetorheological intracavitary, and is close to upper piston
Body；Lower coil locks on the piston rod of magnetic suspension intracavitary, and is close to lower piston body；Upper and lower coil lead is through on piston rod
Lead channels are drawn, and independent control；
Permanent magnet, including upper permanent magnet and lower permanent magnet, upper permanent magnet locking is close to lower piston body in piston rod end,
Lower permanent magnet is directly pull-in on the bottom of cylinder body；Upper and lower permanent magnets same polarity is opposite, and magnetic suspension force is formed by upper, permanent magnet.
2. a kind of combined type MR vibration damper according to claim 1, it is characterised in that：Floating valve body is in magnetorheological chamber
One side is provided with sealing figure, and position of the floating valve body in cylinder body can fluctuate；Floating valve body and sealing ring are exhausted magnetic material.
3. a kind of combined type MR vibration damper according to claim 1, it is characterised in that：Magnetic suspension intracavitary has filled height
It calms the anger body.
4. a kind of combined type MR vibration damper according to claim 1, it is characterised in that：Upper permanent magnet is in lower piston
Body lower face, lower coil are arranged on the upper surface of lower piston body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721516959.6U CN207454650U (en) | 2017-11-14 | 2017-11-14 | A kind of combined type MR vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721516959.6U CN207454650U (en) | 2017-11-14 | 2017-11-14 | A kind of combined type MR vibration damper |
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| Publication Number | Publication Date |
|---|---|
| CN207454650U true CN207454650U (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721516959.6U Expired - Fee Related CN207454650U (en) | 2017-11-14 | 2017-11-14 | A kind of combined type MR vibration damper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107640A (en) * | 2019-05-27 | 2019-08-09 | 江西科技学院 | Dampening arrangement and its control method |
| CN110613216A (en) * | 2019-10-25 | 2019-12-27 | 浙江师范大学 | Rigidity stepless adjustable alpenstock |
| CN112324744A (en) * | 2020-11-17 | 2021-02-05 | 崔蝶 | Buffer hydraulic oil cylinder |
| CN114576307A (en) * | 2022-03-24 | 2022-06-03 | 曹明恩 | Damping and buffering device for textile machinery |
| CN116066438A (en) * | 2022-12-27 | 2023-05-05 | 中国矿业大学 | Leakage-free impact-resistant high-speed digital valve |
-
2017
- 2017-11-14 CN CN201721516959.6U patent/CN207454650U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107640A (en) * | 2019-05-27 | 2019-08-09 | 江西科技学院 | Dampening arrangement and its control method |
| CN110107640B (en) * | 2019-05-27 | 2024-02-09 | 江西科技学院 | Shock absorber device and control method thereof |
| CN110613216A (en) * | 2019-10-25 | 2019-12-27 | 浙江师范大学 | Rigidity stepless adjustable alpenstock |
| CN112324744A (en) * | 2020-11-17 | 2021-02-05 | 崔蝶 | Buffer hydraulic oil cylinder |
| CN114576307A (en) * | 2022-03-24 | 2022-06-03 | 曹明恩 | Damping and buffering device for textile machinery |
| CN114576307B (en) * | 2022-03-24 | 2023-08-25 | 枣庄天宏新材料科技有限公司 | Damping buffer device for textile machinery |
| CN116066438A (en) * | 2022-12-27 | 2023-05-05 | 中国矿业大学 | Leakage-free impact-resistant high-speed digital valve |
| CN116066438B (en) * | 2022-12-27 | 2024-01-30 | 中国矿业大学 | Leakage-free impact-resistant high-speed digital valve |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20211114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |