CN1219161C - Construction variable straight magnetic current flowing deforming brake - Google Patents
Construction variable straight magnetic current flowing deforming brake Download PDFInfo
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- CN1219161C CN1219161C CN 03141794 CN03141794A CN1219161C CN 1219161 C CN1219161 C CN 1219161C CN 03141794 CN03141794 CN 03141794 CN 03141794 A CN03141794 A CN 03141794A CN 1219161 C CN1219161 C CN 1219161C
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- magnetic conductive
- electromagnetic coil
- inner cylinder
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Abstract
The present invention relates to a direct-acting magnetic rheological fluid damper with a changeable structure. The present invention mainly comprises a sealing cover, a magnetic conductive outer cylinder, an electromagnetic coil, sealing materials, a piston, a connecting rod, magnetic rheological fluid, a magnetic conductive inner cylinder, a thrust pin and a detachable piston, wherein the magnetic conductive outer cylinder and the magnetic conductive inner cylinder are all cylinder bodies made of magnetic conductive materials, and a disk-shaped spacing structure is added to the magnetic conductive inner cylinder. The piston and the connecting rod are connected with the detachable piston through the thrust pin after passing through the magnetic conductive inner cylinder, the electromagnetic coil is attached to the inner part of a casing body of the magnetic conductive outer cylinder, the electromagnetic coil and the magnetic conductive outer cylinder are installed on the magnetic conductive inner cylinder together, the magnetic rheological fluid is filled in the magnetic conductive inner cylinder, and the sealing materials is sealed with the sealing cover. The magnetic conductive inner cylinder and the magnetic conductive outer cylinder enable a magnetic circuit generated by the electromagnetic coil to be closed in the damper, and magnetic fields are ensured to intensively act on the magnetic rheological fluid. A spacing structure of the magnetic conductive inner cylinder divides the cylinder body into two parts for the piston, the connecting rod and the detachable piston to move, and the spacing structure of the magnetic conductive inner cylinder improves magnetic rheological efficiency and limits the displacement of the piston. The detachable piston also has the function that damping force provided by the damper can be further enlarged.
Description
Technical field
What the present invention relates to is a kind of direct-acting type damper, particularly a kind ofly changes the direct-acting type magnetic rheological liquid damper of damper structure flexibly by removable piston and thrust pin, belongs to engineering vibrotechnique field.
Background technique
Magnetic flow liquid is made up of base fluid, the magnetic material that is suspended in base fluid and stabilizer, has the characteristic and the liquid fluidity of magnetic material.Adding under the action of a magnetic field, rapid change can take place in the rheological properties of magnetic flow liquid, and rheological properties changes along with the variation of externally-applied magnetic field intensity.The variation of the apparent viscosity of magnetic flow liquid be continuous, reversible, rapidly and be easy to control, the apparent viscosity that is magnetic flow liquid has stepless adjustable characteristic, thereby make magnetic flow liquid obtain application corresponding, and become an important branch of current intellectual material research in fields such as automobile, machinery, building, medical treatment.
Magnetic rheological liquid damper is a kind of important application aspect of magnetic flow liquid, can be used for the damping and the rigidity of Control Engineering mechanical system.It is little that magnetic rheological liquid damper has a volume, the worker consumes few, damping force is bigger, dynamic range is wide, frequency response height and the advantage that adapts to face width, particularly magnetic rheological liquid damper has been avoided traditional passive type damper bad adaptability and active spoiler control algorithm complexity and controller stability problem, is considered to desirable replacement device active, the passive type control unit.
At present, researched and developed various dampers both at home and abroad, summed up to get up to be divided into three major types: pressure-driven pattern, shear mode and squeeze mode based on magnetic flow liquid.U.S. Lord company makes in the prior art is used for the direct-acting type magnetic rheological liquid damper (U.S.Patent5547049) of large-scale truck driver's chair half active damping system and the patent No. is called " a kind of magneto-rheologic fluid damper " for the ZL00229769.8 name utility model patent, the path of its magnetic flow liquid is included in the piston with relevant magnetic circuit, electric current is sent into electromagnet by the lead in the hollow piston rod, although more magnetic flow liquid is housed in the damper thereby caused, effective magnetic current scale of construction less defects of field region at any time; And the big stroke magnetic rheological liquid damper with bypass of Bolter (Bolter R, Janocha H.Performance of long-stroke and low-stroke MRfluid dampers.In:Davis L P, Proceedings of SPIE-Int.Soc.Opt.Eng., Vol.3327.Washington:SPIE, 1998,303～313) complex structure, and when velocity of piston is higher, can cause high rheology speed and shearing strain rate, magnetorheological efficient is reduced.
Summary of the invention
For deficiency and the defective that overcomes prior art, the present invention proposes a kind of direct-acting type magnetic rheological liquid damper that changes damper structure by removable piston and thrust pin flexibly.Mainly comprise piston and connecting rod, magnetically conducting inner tube, removable piston, thrust pin, electromagnetic coil, magnetic conduction urceolus, sealing material, sealing cover, magnetic flow liquid etc.The piston of piston and connecting rod and removable piston all are processed with the aperture that flows through for magnetic flow liquid.Magnetically conducting inner tube and magnetic conduction urceolus all are cylindrical bodys of being made by permeability magnetic material; Wherein, magnetically conducting inner tube has increased discoidal limit structure, and this structure centre has the circular hole for piston and link motion.
After piston and connecting rod pass magnetically conducting inner tube, be connected with removable piston by thrust pin; Electromagnetic coil is attached in the magnetic conduction urceolus housing, and its lead is drawn the magnetic conduction urceolus, and electromagnetic coil is installed on the magnetically conducting inner tube with the magnetic conduction urceolus; Magnetic flow liquid is injected magnetically conducting inner tube, use the sealing of sealing material and sealing cover.
Electromagnetic coil of the present invention separates with piston, is support with the magnetically conducting inner tube, thereby has reduced the complexity of structure, has increased effective Fluid Volume of field region; The number of turn of electromagnetic coil and the voltage that applies have tangible influence to magnetic flux, thereby, indirect decision the damping force that can bear of damper, the damping force that the big then damper of electromagnetic coil number of turn voltage more, that apply bears wants big, the number of turn of coil and the voltage that applies can be by calculating, thereby should guarantee that electromagnetic coil produces the apparent viscosity that magnetic flow liquid could be controlled and change to enough magnetic intensities effectively.
Magnetically conducting inner tube and magnetic conduction urceolus are magnetic circuit closed in damper structure inside with the electromagnetic coil generation, guarantee that the magnetic field that electromagnetic coil produces acts on the magnetic flow liquid in the concentrated area as far as possible, reduces the electric current of electromagnetic coil.
The limit structure of magnetically conducting inner tube, cylinder body is divided into two-part, a part is for piston and link motion, another part offers removable piston motion, can determine whether to install removable piston according to actual needs, the limit structure of magnetically conducting inner tube has improved magnetorheological efficient on the one hand, has limited the displacement of piston on the other hand, thereby has improved the Security and the reliability of structure.The design of removable piston has three aspect effects, except that above-mentioned two aspect effects, also further increases the damping force that damper can provide.
The present invention has increased effective Fluid Volume of any time field region, has improved magnetorheological efficient, has improved the flexibility of damper structure, has high economic benefit and social benefit.
Description of drawings
Fig. 1 is the structural representation of the direct-acting type magnetic rheological liquid damper of structurally variable.
Among the figure, 1 is sealing cover, and 2 is the magnetic conduction urceolus, and 3 is electromagnetic coil, and 4 is sealing material, and 5 is piston and connecting rod, and 6 is magnetic flow liquid, and 7 is magnetically conducting inner tube, and 8 is thrust pin, and 9 is removable piston.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention mainly comprises: sealing cover 1, magnetic conduction urceolus 2, electromagnetic coil 3, sealing material 4, piston and connecting rod 5, magnetic flow liquid 6, magnetically conducting inner tube 7, thrust pin 8, removable piston 9.Piston in piston and the connecting rod 5 and removable piston 9 all are processed with the aperture that flows through for magnetic flow liquid 6.Magnetic conduction urceolus 2 and magnetically conducting inner tube 7 all are cylindrical bodys of being made by permeability magnetic material; Wherein, magnetically conducting inner tube 7 has increased discoidal limit structure, and this structure centre has the circular hole for piston and connecting rod 5 motions.After piston and connecting rod 5 pass magnetically conducting inner tube 7, be connected with removable piston 9 by thrust pin 8; Electromagnetic coil 3 is attached in magnetic conduction urceolus 2 housings, and its lead is drawn magnetic conduction urceolus 2, then electromagnetic coil 3 is enclosed within on the magnetically conducting inner tube 7 with magnetic conduction urceolus 2; The sealing material 4 of left end and sealing cover 1 join by bolt and magnetic conduction urceolus 2 left ends, and magnetic flow liquid 6 is injected in the magnetically conducting inner tube 7, and sealing material 4 and the sealing cover 1 with right-hand member joins by bolt and magnetic conduction urceolus 2 right-hand members again.
During application, the two ends of piston and connecting rod 5 are connected with the engineering system of vibration to be controlled; Whether the size decision according to the damping force that damper bore installs thrust pin 8 and removable piston 9.When the bigger or possible stressed situation of needed damping force in the reality is not clear, can consider to install above-mentioned parts; And required damping force hour does not then need to install removable piston 9 and thrust pin 8 in the reality; Simultaneously, when the movement velocity of institute's supporting structure is very fast,, then need to consider to install thrust pin 8 and removable piston 9 for improving magnetorheological efficient.
When no applied voltage, electromagnetic coil 3 no magnetic fields produce, and at this moment, when this damper was subjected to active force, magnetic flow liquid 6 flow through from the aperture of piston and connecting rod 5 and piston 9, and the effect of corresponding hydraulic damper is played in this invention; When applied voltage gives electromagnetic coil 3 energisings, make electromagnetic coil 3 produce magnetic field, magnetic conduction urceolus 2, magnetically conducting inner tube 7 acts on magnetic flow liquid 6 with making magnetic field concentration, under the effect in magnetic field, magnetic flow liquid 6 rapid classes are solidified, the flowability of magnetic flow liquid 6 is weakened, form chain thing or decorating film, shear resistance improves, be that the damping force that piston and connecting rod 5 and piston 9 motions are subjected to increases, according to the intensity in engineering working control magnetic field, make the apparent viscosity of magnetic flow liquid 6 satisfy corresponding damping force requirement, thereby reach the purpose that control is supported in the engineering system Oscillation Amplitude on this damper.
Claims (1)
1. the direct-acting type magnetic rheological liquid damper of a structurally variable, mainly comprise sealing cover (1), magnetic conduction urceolus (2), electromagnetic coil (3), sealing material (4), piston and connecting rod (5), magnetic flow liquid (6), magnetically conducting inner tube (7) is characterized in that also comprising thrust pin (8), removable piston (9), magnetic conduction urceolus (2) and magnetically conducting inner tube (7) they all are cylindrical bodys of being made by permeability magnetic material; Wherein, magnetically conducting inner tube (7) has increased discoidal limit structure, this structure centre has the circular hole for piston and connecting rod (5) motion, the piston of piston and connecting rod (5) and removable piston (9) all are processed with the aperture that flows through for magnetic flow liquid (6), after piston and connecting rod (5) pass magnetically conducting inner tube (7), be connected with removable piston (9) by thrust pin (8); Electromagnetic coil (3) is attached in magnetic conduction urceolus (2) housing, and its lead is drawn magnetic conduction urceolus (2), and electromagnetic coil (3) is enclosed within on the magnetically conducting inner tube (7) with magnetic conduction urceolus (2); Sealing material of left end (4) and sealing cover (1) join by bolt and magnetic conduction urceolus (2) left end, and magnetic flow liquid (6) injects in the magnetically conducting inner tube (7), and sealing material of right-hand member (4) and sealing cover (1) join by bolt and magnetic conduction urceolus (2) right-hand member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141794 CN1219161C (en) | 2003-07-24 | 2003-07-24 | Construction variable straight magnetic current flowing deforming brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141794 CN1219161C (en) | 2003-07-24 | 2003-07-24 | Construction variable straight magnetic current flowing deforming brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1482378A CN1482378A (en) | 2004-03-17 |
| CN1219161C true CN1219161C (en) | 2005-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03141794 Expired - Fee Related CN1219161C (en) | 2003-07-24 | 2003-07-24 | Construction variable straight magnetic current flowing deforming brake |
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| Country | Link |
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| CN (1) | CN1219161C (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319699B (en) * | 2008-07-11 | 2010-04-14 | 重庆大学 | Magneto-rheological fluid vibration damper with ring-shaped external magnetic field generator |
| CN101493184B (en) * | 2009-02-24 | 2013-11-20 | 华南理工大学 | Clearance structure magnetic fluid flow control device |
| CN102102732B (en) * | 2011-03-21 | 2012-09-19 | 东南大学 | Leakage-free fluid damper |
| CN102269235B (en) * | 2011-05-04 | 2013-08-21 | 江苏大学 | Magneto-rheological fluid (MRF) damper based pressure fluctuation self-adjusting system and adjusting method |
| CN102359535B (en) * | 2011-08-31 | 2015-06-17 | 重庆仪表材料研究所 | Magnetorheological damper |
| CN103148157B (en) * | 2012-07-19 | 2016-05-18 | 吉林大学 | Multistage squash type MR damper |
| CN103233998A (en) * | 2013-05-08 | 2013-08-07 | 中南大学 | Outer magnet type mini MR (magnetorheological) damper |
| CN103591209A (en) * | 2013-11-08 | 2014-02-19 | 青岛农业大学 | Seven-level adjustable reciprocating type electrorheological fluid damper |
| CN103753593B (en) * | 2013-12-24 | 2016-03-16 | 中国矿业大学 | The bionic finger that a kind of compliance is controlled |
| CN103697090A (en) * | 2014-01-03 | 2014-04-02 | 青岛农业大学 | Seven-stage adjustable rotary type electrorheological fluid brake |
| CN105092462A (en) * | 2014-05-21 | 2015-11-25 | 深圳市芭田生态工程股份有限公司 | Quick testing method and device for fertilizer agglomeration |
| CN104568737B (en) * | 2015-01-08 | 2017-11-10 | 重庆材料研究院有限公司 | Magnetic control hydrodynamic performance test device based on flow pattern |
| CN106406079A (en) * | 2016-11-21 | 2017-02-15 | 清华大学 | Vehicle, magnetorheological fluid type vehicle shock absorbing seat control device and method thereof |
| CN108930752A (en) * | 2018-07-23 | 2018-12-04 | 株洲时代新材料科技股份有限公司 | A kind of MR damper |
| CN111895031A (en) * | 2020-07-28 | 2020-11-06 | 河海大学 | Magnetorheological fluid damper with heat insulation function |
-
2003
- 2003-07-24 CN CN 03141794 patent/CN1219161C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1482378A (en) | 2004-03-17 |
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