CN207454649U - The MR vibration damper of non-magnetic piston rod - Google Patents
The MR vibration damper of non-magnetic piston rod Download PDFInfo
- Publication number
- CN207454649U CN207454649U CN201721513227.1U CN201721513227U CN207454649U CN 207454649 U CN207454649 U CN 207454649U CN 201721513227 U CN201721513227 U CN 201721513227U CN 207454649 U CN207454649 U CN 207454649U
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- piston
- piston rod
- cylinder body
- magnetic
- end cap
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Abstract
The utility model is related to a kind of MR vibration damper of non-magnetic piston rod, including cylinder body, end cap, piston rod, piston and coil；End cap lid is located at cylinder body openend, and magnetorheological fluid is filled in cylinder body；The piston activity is hubbed in cylinder body, and leaves the gap for magnetorheological fluid flowing with cylinder body, has undergauge section in the middle part of piston, the coil is arranged in the undergauge section；Piston rod one end is mutually fixed with piston, the other end is stretched out outside upper end cover, is locked with the first object, and the cylinder body and the second object lock；It is characterized in that：The piston rod is Split type structure with piston, and is locked integrally by bolt；Piston rod uses the tin bronze of magnetic conductivity difference, and piston is using the small mild steel of the big magnetic resistance of magnetic flux.For the utility model piston rod with piston using Split type structure, piston rod uses the tin bronze material of magnetic conductivity difference, can reduce magnetic loss, and piston improves energy utilization efficiency, dampening range is adjusted in increase damper using high permeability material.
Description
Technical field：
The utility model belongs to magnetorheological cushion technique field, more particularly to a kind of magnetorheological damping of non-magnetic piston rod
Device, especially can be as vehicle, the level-one damping device of road roller.
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.Such as number of patent application
201420348884.5, a kind of magnetorheological fluid shock absorber is disclosed, including cylinder barrel, the upper end cover of cylinder barrel upper end is fixed on, is fixed on
The bottom end cover of cylinder barrel lower end, the piston, one end and the piston upper surface that are arranged in cylinder and are slidably matched with cylinder barrel are fixed and separately
One end stretch out upper end cover outside piston rod and along piston circumferentially around magnet exciting coil；Cylinder barrel is divided into epicoele under by piston
Chamber；Bottom end cover coordinates with the liquid-tight envelope of cylinder barrel；The baffle for being fixed on piston lower surface is further included, between baffle and the lower face of piston
Damping cavity with peripheral sealing, baffle have the third channel of connection damping cavity and cavity of resorption；The top of piston has and epicoele
It connects and the first passage of lateral direction penetrating piston, piston has axially extending and connecting first passage and damping cavity second to lead to
Road.
At present, such damper, piston and piston rod are the integrated design, especially with the strong Q-235 structures of rigidity
Steel, magnetic loss is bigger after energization, influences the efficiency of damper.
The content of the invention：
The purpose of this utility model is that a kind of piston rod of design is Split type structure with piston and uses different materials, can be subtracted
The MR vibration damper of the non-magnetic piston rod of few internal magnetic loss.
What technical solutions of the utility model were realized in：A kind of MR vibration damper of non-magnetic piston rod, including cylinder
Body, end cap, piston rod, piston and coil；End cap lid is located at cylinder body openend, and magnetorheological fluid is filled in cylinder body；The work
Plug activity is hubbed in cylinder body, and leaves the gap for magnetorheological fluid flowing with cylinder body, has undergauge section, the line in the middle part of piston
Circle is arranged in the undergauge section；Piston rod one end is mutually fixed with piston, the other end is stretched out outside upper end cover, is locked with the first object,
The cylinder body and the second object lock；It is characterized in that：The piston rod and piston are Split type structure, and by bolt locking into
One；Piston rod uses the tin bronze of magnetic conductivity difference, and piston is using the small mild steel of the big magnetic resistance of magnetic flux.
Space of the cylinder body between piston and end cap, then by divider separates into two chambers, piston one side fills magnetic
Rheology liquid, end cap one side form air chamber；Sealing ring is provided between separator and cylinder body, separator and piston rod.
For the utility model piston rod with piston using Split type structure, piston rod uses the tin bronze material of magnetic conductivity difference, can
To reduce magnetic loss, and piston improves energy utilization efficiency, damping model is adjusted in increase damper using high permeability material
It encloses.
Description of the drawings：
The utility model is described further with reference to specific legend：
Fig. 1 is MR vibration damper diagrammatic cross-section
Fig. 2 is the diagrammatic cross-section of Fig. 1 vertical direction
Fig. 3 is A close-up schematic views in Fig. 2
Fig. 4 is MR vibration damper end view
Fig. 5 is piston rod and piston integral structure magnetic flux density analysis chart
Fig. 6 is piston rod and piston Split type structure magnetic flux density analysis chart
Wherein
1-cylinder body, 10-magnetorheological fluid, 2-end cap, 3-piston rod
4-piston, 41-gap, 42-necking segment, 5-coil
6-separator, 61-sealing ring, 7-upper backup pad, 8-side plate
81-rubber slab, 9-bolt
Specific embodiment：
Referring to figs. 1 to Fig. 4, the MR vibration damper of non-magnetic piston rod, including cylinder body 1, end cap 2, piston rod 3, piston 4
With coil 5；Cylinder body 1 may be selected core structure with the end or bottom cover can be added to close.End cap 2, which covers, is located at cylinder body openend, and
Magnetorheological fluid 10 is filled in cylinder body 1.
Piston rod 3 is Split type structure with piston 4, and passes through bolt 9 and lock integrally；Piston rod 3 is using magnetic conductivity difference
Tin bronze, piston 4 is using the small mild steel of the big magnetic resistance of magnetic flux.As shown in Figure 5 and Figure 6：If piston rod and piston are using one
Formula structure, magnetic induction line can go out along piston rod direction from the magnetic-conductance portions bit stream such as end cap of MR damper, make between magnetorheological fluid
Magnetic induction intensity at gap reduces.Using split structure MR damper because at piston rod magnetic conductivity it is very low, it is all
Magnetic induction line is flowed out each along magnetorheological fluid gap location, therefore the density of the line of magnetic induction of gap location is more uniform, and magnetic field intensity is more
Greatly.
4 activity of piston is hubbed in cylinder body 1, and the gap 41 flowed for magnetorheological fluid 10, gap 41 are left between cylinder body 1
Can be the notch being distributed on 4 circumference of uniform gap or piston, formed can allow magnetorheological fluid 10 by gap；Piston 4
Middle part has undergauge section 42, coil 5 is provided in the necking segment 42, coil 5 is iron core with piston necking segment 42, is produced after energization
Raw high-intensity magnetic field, changes the form of magnetorheological fluid, and changes damping effect with this；3 one end of piston rod is fixed with 4 phase of piston, is another
End is stretched out outside upper end cover 2, is locked with the first object, and the locking of 1 and second object of cylinder body is realized and shaken between the first object and the second object
Dynamic buffer action.
Further, space of the cylinder body 1 between piston 4 and end cap 2, then two chambers, piston 4 one are separated by separator 6
Side fills magnetorheological fluid 10,2 one side of end cap forms air chamber；It is provided between separator 6 and cylinder body 1, separator 6 and piston rod 3
Sealing ring 61.
Legend is practical application of the MR vibration damper of non-magnetic piston rod on road roller, and the first object is upper support
Plate 7, upper backup pad 7 are fixedly connected by mounting hole with road roller rack；Second object is side plate 8,8 mounting hole of side plate and pressure road
Machine cylinder installation position is connected by bolt；More specifically, side plate 8 is fixed by rubber slab 81 and 1 phase of cylinder body, one side of rubber
Face is used for generating damping, on the other hand plays shearing and resets.
During assembling, first by coil around 5 on piston 4, the lead-out wire of coil 5 is drawn by the centre bore on piston rod 3, and
Piston rod 3 and piston 4 are fastened using bolt 9, then piston is integrally put into cylinder body 1, is injected magnetorheological fluid, is reloaded into separation
Device 6 is locked at end cap 2 on cylinder body 1.It assembles, then upper backup pad 7 with 3 end of piston rod is connected, is locked on cylinder body 1
Side plate 8.
When damper works, between upper backup pad 7 and side plate 8, generate along 1 axis direction parallel motion of cylinder body, make piston
Relative motion is generated between bar and cylinder body, by changing the operating current of excitation coil on piston rod, to change field circuit
Magnetic field intensity realizes the adjustable of absorber damping force size.Vibration wheel of road roller generates the energy of vibration force through damper action
It is scaled and is transferred to rack, reach damping effect.Vibrating wheels are different according to different road conditions vibration frequencies, according to vibration
Frequency shift coil current size so as to change magnetic field intensity, reaches the state for changing magnetorheological fluid, changes damping, reach and subtract
It shakes effect.Understand that vibration source is transferred to piston by side plate, contacts and reaches with magnetorheological fluid damp by piston rod according to the structure of figure
To the purpose of vibration damping, rubber block is mainly to maintain the position degree of piston cylinder and certain effectiveness in vibration suppression, and piston rod, which acts on, to be cut
Cutting plate reduces frame vibration amplitude.
Claims (2)
1. a kind of MR vibration damper of non-magnetic piston rod, including cylinder body, end cap, piston rod, piston and coil；End cap lid is set
In cylinder body openend, and magnetorheological fluid is filled in cylinder body；The piston activity is hubbed in cylinder body, and is left with cylinder body for magnetic
The gap that rheology liquid stream is moved, piston middle part have undergauge section, and the coil is arranged in the undergauge section；Piston rod one end and piston
The mutually fixed, other end is stretched out outside upper end cover, is locked with the first object, and the cylinder body and the second object lock；It is characterized in that：Institute
It is Split type structure that piston rod, which is stated, with piston, and is locked integrally by bolt；Piston rod uses the tin bronze of magnetic conductivity difference, piston
Using the small mild steel of the big magnetic resistance of magnetic flux.
2. the MR vibration damper of non-magnetic piston rod according to claim 1, it is characterised in that：Cylinder body is in piston and end
Space between lid, then by divider separates into two chambers, piston one side fills magnetorheological fluid, end cap one side forms air chamber；
Sealing ring is provided between separator and cylinder body, separator and piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513227.1U CN207454649U (en) | 2017-11-14 | 2017-11-14 | The MR vibration damper of non-magnetic piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721513227.1U CN207454649U (en) | 2017-11-14 | 2017-11-14 | The MR vibration damper of non-magnetic piston rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207454649U true CN207454649U (en) | 2018-06-05 |
Family
ID=62279382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721513227.1U Active CN207454649U (en) | 2017-11-14 | 2017-11-14 | The MR vibration damper of non-magnetic piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207454649U (en) |
-
2017
- 2017-11-14 CN CN201721513227.1U patent/CN207454649U/en active Active
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