CN203627637U - Magneto-rheological fluid damper - Google Patents
Magneto-rheological fluid damper Download PDFInfo
- Publication number
- CN203627637U CN203627637U CN201320624289.5U CN201320624289U CN203627637U CN 203627637 U CN203627637 U CN 203627637U CN 201320624289 U CN201320624289 U CN 201320624289U CN 203627637 U CN203627637 U CN 203627637U
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- piston
- magnetic
- cylinder barrel
- damper
- field coil
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Abstract
The utility model discloses a magneto-rheological fluid damper comprising a cylinder barrel (3). A piston rod (2) capable of sliding in the cylinder barrel (3) is disposed in the cylinder barrel (3), an end cover covers the cylinder barrel (3), the piston rod (2) is provided with a piston disc (5) and at least two magnet core sleeves (6), a permanent magnet ring (7) is embedded in the piston disc (5), an exciting coil (9) sleeves the magnet core sleeves (6), the cylinder barrel (3) is filled with magneto-rheological fluid (11), and the exciting coil (9) is led out via a lead. Zero-current damping force is adjusted between maximum damping force and minimum damping force, and failure safety of the magneto-rheological fluid damper is effectively guaranteed.
Description
Technical field
The utility model relates to automotive field, relates in particular to a kind of magnetic rheological liquid damper.
Background technique
Magnetic flow liquid is a kind of novel intellectual material.The flow characteristic that is exactly specifically magnetic flow liquid can change along with added magnetic field.In not adding magnetic field, magnetic flow liquid shows as liquid condition, and adds behind magnetic field, and in magnetic flow liquid, the polarized particle of random distribution becomes chain or column structure along magnetic direction, show as solid state, and the process of a variation very of short duration (Millisecond).And be reversible by the process that liquid condition changes solid state into.Once eliminate in magnetic field, magnetic flow liquid can be got back to again liquid condition.The magnetic rheological liquid damper that adopts magnetic flow liquid to make has the features such as damping force is large, volume is little, regulation range is wide.
Existing magnetic rheological liquid damper structure is had nothing in common with each other, but traditional magnetic rheological liquid damper damping force in the situation that of deenergization is very little, controls weak effect, and failure-to-safety performance is poor; Magnetic flow liquid there will be sedimentation phenomenon for a long time in the time of zero magnetic field state, affects the performance of magnetic flow liquid; Traditional magnetic rheological liquid damper has longer piston tail, and structure is compact not, and cost is higher; The field coil of coiling is long-term exposed in the middle of magnetic rheological liquid, and the working life of field coil is not long, has increased the user cost of damper; Magnetic rheological liquid damper lacks seal arrangement, and under operating conditions, magnetic flow liquid is revealed serious; Piston there will be the problem of idle stroke in the middle of movement process, has improved the reaction time of damper, sensitivity.
Model utility content
Technical problem to be solved in the utility model is to provide the magnetic rheological liquid damper that a kind of damping force grade is adjustable, failure-to-safety performance obtains effective guarantee.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of magnetic rheological liquid damper, comprise cylinder barrel, in described cylinder barrel, be provided with the piston rod that can slide in cylinder barrel, and be provided with end cap and seal described cylinder barrel, described piston rod is provided with piston plate and is no less than the magnetic core sleeve of two, in described piston plate, be inlaid with permanent-magnetic clamp, described magnetic core bush outer sleeve is equipped with field coil, in described cylinder barrel, is full of magnetic flow liquid, and described field coil is derived by wire.
On described piston rod, be followed successively by piston panel, magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, the permanent magnet pole in each piston panel is contrary, and two piston panels at middle part are equipped with two piston plates.
Outermost two piston panels are provided with resistance disk, and described field coil outside is enclosed with sealing layer.
In described cylinder barrel, be provided with mobile piston, cylinder barrel is divided into two airtight cavities by described mobile piston, places piston rod and fill magnetic flow liquid in a cavity, fills nitrogen in another cavity.
Described mobile piston is set with seal ring outward.
On described piston rod and cylinder barrel, be equipped with earrings.
The utility model has the advantage of,
1. when MR damper control system breaks down, system input current is 1 o'clock, and six permanent-magnetic clamps work alone and make the magnetic flow liquid at damp channel place produce damping force, thereby solve failure safe problem;
2. when vehicle stop work, damper is in off working state, and its inside can keep certain magnetic intensity, thereby can solve magnetic flow liquid standing sedimentation problem;
3. in order to prevent that permanent-magnetic clamp under externally-applied magnetic field effect, permanent demagnetization occurring repeatedly, permanent-magnetic clamp adopts the rubidium iron boron class permanent magnet that coercivity is high to make, and thickness only has several millimeters to guarantee that field coil can fully magnetize to it, demagnetize;
4. in order to solve piston idle stroke problem in the course of the work, damper is provided with compensated cavity, adopts high pressure nitrogen to promote mobile piston work in compensated cavity.
5. in order to make the longer service life of field coil, after field coil coiling completes, there is an epoxide resin material field coil is external coated.
6. in order to solve the leakage problem of magnetic flow liquid in damper, damper is provided with seal ring, prevents that the nitrogen in compensated cavity from mixing with magnetorheological liquid phase in cylinder barrel.
7. in order to reduce the manufacture cost of damper, in the length that guarantees to shorten in damper has greater efficiency piston rod as far as possible.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of magnetic rheological liquid damper of the utility model;
Mark in above-mentioned figure is: 1, earrings, 2, piston rod, 3, cylinder barrel, 4, resistance disk, 5, piston plate, 6, magnetic core sleeve, 7, permanent-magnetic clamp, 8, sealing layer, 9, field coil, 10, damp channel, 11, magnetic flow liquid, 12, mobile piston, 13, seal ring, 14, compensated cavity.
Embodiment
Fig. 1 is the structural representation of a kind of magnetic rheological liquid damper of the utility model, comprise cylinder barrel 3, in cylinder barrel 3, being provided with can be at the piston rod 2 of cylinder barrel 3 interior slips, and be provided with end cap sealing cylinder barrel 3, piston rod 2 is provided with piston plate 5 and is no less than the magnetic core sleeve 6 of two, is inlaid with permanent-magnetic clamp 7 in piston plate 5, the outer field coil 9 that is set with of magnetic core sleeve 6, in cylinder barrel 3, be full of magnetic flow liquid 11, field coil 9 is derived by wire.
On piston rod 2, be followed successively by piston panel, magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, the permanent magnet pole in each piston panel is contrary, and two piston panels at middle part are equipped with two piston plates 5.Outermost two piston panels are provided with resistance disk 4, and field coil 9 outsides are enclosed with sealing layer 8.
In cylinder barrel 3, be provided with mobile piston 12, cylinder barrel 3 is divided into two airtight cavities by mobile piston 12, places piston rod 2 and fill magnetic flow liquid 11 in a cavity, fills nitrogen in another cavity.The outer seal ring 13 that is set with of mobile piston 12.On piston rod 2 and cylinder barrel 3, be equipped with earrings 1.
Piston plate 5 has six, and four piston plates 5 on neutral position are for being oppositely arranged between two, on the axisymmetric axis of each piston plate 5, have a groove, in groove, be inserted with a permanent-magnetic clamp 7, the polarity of permanent-magnetic clamp 7 as shown in Figure 1, three magnetic core sleeves 6 are arranged on respectively on piston rod 2 successively, a field coil 9 is housed on each magnetic core sleeve 6, field coil 9 outsides are by annular resin environmental sealing, prevent the destruction of magnetic flow liquid 11 to field coil 9, improve the working life of field coil 9, piston plate 5 both sides in left and right are each installs a stainless steel resistance disk 4 in case leak-stopping magnetic, magnetic flow liquid 11 is full of cylinder barrel 3, between piston plate 5 and cylinder barrel 3, form damp channel 10, the leftmost side and the rightmost side at cylinder barrel 3 are furnished with two earrings 1, so that the as installed of damper.
According to the magnetic circuit trend of mounting type and damper, permanent-magnetic clamp 7 is along radially charging.The polarity of the permanent-magnetic clamp 7 inserting in each relative piston plate 5 is contrary, and in the time being the N utmost point outside the inner side of a permanent-magnetic clamp 7 is the S utmost point, the inner side of its another relative permanent-magnetic clamp 7 is that N utmost point outside is the S utmost point.In addition, rubidium iron boron class permanent magnet coercive force is very high, and the number of turn of field coil 9 and electric current limited, in order to allow field coil 9 can carry out fully magnetizing/demagnetizing to permanent-magnetic clamp 7, the radial thickness of permanent-magnetic clamp 7 is only several millimeters.
Under the state of zero current, be not have electric current to pass through in field coil 9, in field coil 9, can not produce magnetic field, owing to being inserted with permanent-magnetic clamp 7 in piston plate 5, now only have permanent-magnetic clamp 7 to work alone, the magnetic induction intensity of the interior magnetic flow liquid 11 of damp channel 10 is only caused by permanent-magnetic clamp 7, and then the state of change magnetic flow liquid 11 is controlled the damping force of magnetic rheological liquid damper.While all leading to forward current to field coil 9, in field coil 9, produce induction field, and the direction of induction field is consistent at the magnetic direction at damp channel 10 places with permanent-magnetic clamp 7, be the effect in the magnetic field of magnetizing that produces of field coil 9, now, magnetic flow liquid 11 is subject to the acting in conjunction of permanent-magnetic clamp 7 and field coil 9, form composite magnetic circuit, the magnetic induction intensity of damp channel 10 strengthens gradually, until the reaching capacity of magnetic flow liquid 11, now the damping force of magnetic rheological liquid damper reaches maximum value.In the time leading to back current to field coil 9, the direction of the induction field producing in field coil 9 is contrary with the magnetic direction that permanent-magnetic clamp 7 produces at damp channel 10 places, it is the effect that produces demagnetized field in field coil 9, the state of magnetic flow liquid 11 is subject to the acting in conjunction of permanent-magnetic clamp and field coil 9, the magnetic induction intensity of damp channel 10 weakens gradually, until induction is zero, the damping force of magnetic rheological liquid damper will reach minimum value.
Each field coil 9 has independent wire to draw, can regulate continuously and damping force classification adjusting according to specific works environmental selection, when damping force classification regulates, because the current direction in field coil 9 has forward and reverse two kinds, so each field coil 9 can produce two kinds of induction fields, magnetic rheological liquid damper will produce two kinds of damping forces, as shown in Figure 1, in damper, have three field coils 9, add original state, shown damper has seven kinds of damping force grades, regulates thereby can realize classification.
The cylinder barrel 3 of magnetic rheological liquid damper is fixed with the passage of damp channel 10, low order end inner side at cylinder barrel 3 is provided with a compensated cavity 14 that is full of nitrogen, there is a mobile piston 12 in the left side of compensated cavity 14, on mobile piston 12, be furnished with two seal rings 13.Damper makes piston rod 2 afterbodys within rational length range when guaranteeing higher efficiency, cylinder barrel 3 inner spaces are in order compact, has reduced the manufacture cost of magnetic rheological liquid damper.When piston moves from right to left, cylinder barrel 3 pressure on piston right side are less than piston left side cylinder barrel 3 pressure, and piston is in the process moving to left, and magnetic flow liquid 11 flows that damp channel 10 flows through are certain, cylinder barrel 3 magnetic flow liquids 11 of piston right-hand member can not be compensated in time, will gappedly exist.If there is no compensated cavity 14, piston left and right end reaches pressure balance needs a period of time, in the time that piston right-hand member cylinder barrel 3 all fills up, piston left and right end reaches pressure balance, in the time of the magnetic rheological liquid damper shown in installation diagram 1, compensated cavity 14 in cylinder barrel 3 during this time plays a role, the compensated cavity 14 that is full of nitrogen expands, promoting mobile piston 12 is moved to the left, seal ring 13 on mobile piston 12 is isolated magnetic flow liquid 11 and nitrogen, avoid the magnetic flow liquid 11 in nitrogen and the cylinder barrel 3 in compensated cavity 14 to mix, improve the purity of gas and liquid, mobile piston 12 promotes magnetic flow liquid 11 and is moved to the left in moving to left, eliminate the liquid gap in piston right-hand member cylinder barrel 3, accelerate the reaction time of damper, efficiency and the sensitivity of magnetic rheological liquid damper are improved.
Adopt after such structure,
1. when MR damper control system breaks down, system input current is 1 o'clock, and six permanent-magnetic clamps 7 work alone and make the magnetic flow liquid at damp channel 10 places produce damping force, thereby solve failure safe problem;
2. when vehicle stop work, damper is in off working state, and its inside can keep certain magnetic intensity, thereby can solve magnetic flow liquid 11 standing sedimentation problems;
3. in order to prevent that permanent-magnetic clamp 7 under externally-applied magnetic field effect, permanent demagnetization occurring repeatedly, permanent-magnetic clamp 7 adopts the rubidium iron boron class permanent magnet that coercivity is high to make, and thickness only has several millimeters to guarantee that field coil 9 can fully magnetize to it, demagnetize;
4. in order to solve piston idle stroke problem in the course of the work, damper is provided with compensated cavity 14, and the interior employing high pressure nitrogen of compensated cavity 14 promotes mobile piston 12 and works.
5. in order to make the longer service life of field coil 9, after field coil 9 coilings complete, there is an epoxide resin material field coil 9 is external coated.
6. in order to solve the leakage problem of magnetic flow liquid 11 in damper, damper is provided with seal ring 13, prevents that the nitrogen in compensated cavity 14 from mixing mutually with the interior magnetic flow liquid 11 of cylinder barrel 3.
7. in order to reduce the manufacture cost of damper, in the length that guarantees to shorten in damper has greater efficiency piston rod 2 as far as possible.
By reference to the accompanying drawings the utility model is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; or without improving, design of the present utility model and technological scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (3)
1. a magnetic rheological liquid damper, comprise cylinder barrel (3), in described cylinder barrel (3), be provided with the piston rod (2) that can slide in cylinder barrel (3), and be provided with end cap and seal described cylinder barrel (3), it is characterized in that, described piston rod (2) is provided with piston plate (5) and is no less than the magnetic core sleeve (6) of two, in described piston plate (5), be inlaid with permanent-magnetic clamp (7), the outer field coil (9) that is set with of described magnetic core sleeve (6), in described cylinder barrel (3), be full of magnetic flow liquid (11), described field coil (9) is derived by wire, described piston rod is followed successively by piston panel on (2), magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, magnetic core sleeve district, piston panel, the permanent magnet pole in each piston panel is contrary, two piston panels at middle part are equipped with two piston plates (5), outermost two piston panels are provided with resistance disk (4), described field coil (9) outside is enclosed with sealing layer (8), in described cylinder barrel (3), be provided with mobile piston (12), cylinder barrel (3) is divided into two airtight cavities by described mobile piston (12), in a cavity, place piston rod (2) and fill magnetic flow liquid (11), in another cavity, fill nitrogen.
2. magnetic rheological liquid damper as claimed in claim 1, is characterized in that, the outer seal ring (13) that is set with of described mobile piston (12).
3. magnetic rheological liquid damper as claimed in claim 2, is characterized in that, on described piston rod (2) and cylinder barrel (3), is equipped with earrings (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320624289.5U CN203627637U (en) | 2013-10-10 | 2013-10-10 | Magneto-rheological fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320624289.5U CN203627637U (en) | 2013-10-10 | 2013-10-10 | Magneto-rheological fluid damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627637U true CN203627637U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320624289.5U Expired - Fee Related CN203627637U (en) | 2013-10-10 | 2013-10-10 | Magneto-rheological fluid damper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156546A (en) * | 2015-07-20 | 2015-12-16 | 常州大学 | Double-rod multistage-piston passive single-control variable-damping magnetorheological damper |
| CN106015437A (en) * | 2016-07-04 | 2016-10-12 | 北京交通大学 | Order-variable electromagnetic rheological damper |
| CN106402255A (en) * | 2016-11-29 | 2017-02-15 | 哈尔滨工业大学 | Magneto-rheological damper with sinuous magnetic circuit characteristic |
| CN107542822A (en) * | 2017-09-04 | 2018-01-05 | 上海大学 | A kind of passive non-contact Verticle vortex magnetic damping generator of single-degree-of-freedom |
| CN110388404A (en) * | 2019-08-27 | 2019-10-29 | 华东交通大学 | A kind of shearing-type magnetic rheological liquid damper |
| CN114962516A (en) * | 2022-05-31 | 2022-08-30 | 中车制动系统有限公司 | Energy-absorbing buffer with vortex structure |
-
2013
- 2013-10-10 CN CN201320624289.5U patent/CN203627637U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156546A (en) * | 2015-07-20 | 2015-12-16 | 常州大学 | Double-rod multistage-piston passive single-control variable-damping magnetorheological damper |
| CN106015437A (en) * | 2016-07-04 | 2016-10-12 | 北京交通大学 | Order-variable electromagnetic rheological damper |
| CN106402255A (en) * | 2016-11-29 | 2017-02-15 | 哈尔滨工业大学 | Magneto-rheological damper with sinuous magnetic circuit characteristic |
| CN106402255B (en) * | 2016-11-29 | 2018-04-24 | 哈尔滨工业大学 | MR damper with sinuous Magnetic circuit characters |
| CN107542822A (en) * | 2017-09-04 | 2018-01-05 | 上海大学 | A kind of passive non-contact Verticle vortex magnetic damping generator of single-degree-of-freedom |
| CN110388404A (en) * | 2019-08-27 | 2019-10-29 | 华东交通大学 | A kind of shearing-type magnetic rheological liquid damper |
| CN114962516A (en) * | 2022-05-31 | 2022-08-30 | 中车制动系统有限公司 | Energy-absorbing buffer with vortex structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20141010 |
|
| EXPY | Termination of patent right or utility model |