CN101660583B - Speed self-sensing magnetorheological fluid damper - Google Patents
Speed self-sensing magnetorheological fluid damper Download PDFInfo
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- CN101660583B CN101660583B CN2009100729805A CN200910072980A CN101660583B CN 101660583 B CN101660583 B CN 101660583B CN 2009100729805 A CN2009100729805 A CN 2009100729805A CN 200910072980 A CN200910072980 A CN 200910072980A CN 101660583 B CN101660583 B CN 101660583B
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- piston
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- cylinder body
- piston rod
- magnetorheological fluid
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Abstract
The invention provides a speed self-sensing magnetorheological fluid damper with no need of additionally configuration of a sensor, high reliability and low cost. The speed self-sensing magnetorheological fluid damper comprises an inner sealing body, a cylinder body, a piston, an outer sealing body, an inner piston rod, magnetorheological fluid, an outer piston rod, a coil of the inner sealing body, a permanent magnet and a piston coil, wherein, the magnetorheological fluid is contained between the cylinder body and the inner sealing body, the piston coil is wound on the piston, a permanent magnet is arranged at the end part of the inner piston rod, the inner sealing body and the outer sealing body are respectively positioned on the left side and the right side of the piston, the coil of the inner sealing body is arranged inside the cylinder body or outside the cylinder body, or the coil of the inner sealing body is both arranged inside and outside the cylinder body. A control system established on the basis of the damper does not need to additionally configure the sensor, thereby being simpler and being particularly applicable to the control system with limited space. The cost of the control system based on the damper is lower. Although the cost of the damper is higher, the cost of the whole control system is more economic due to no need of the configuration of the sensor.
Description
(1) technical field
The present invention relates to cushion technique, is exactly a kind of speed self-sensing magnetorheological fluid damper specifically
(2) background technique
Damping energy dissipation element and shock absorption system are set in structure, and the energy of dissipative structure vibration is a kind of important measures that alleviate the structural dynamic reflection.Fluid damper is the important damping energy dissipation element of a class, and it is by forcing gap or aperture piston on and the energy-producing loss of fluid by piston and cylinder body.Magnetic rheological liquid damper be utilize magnetic flow liquid under the action of a magnetic field rheological properties and a kind of novel vibration damping equipment that designs, its damping force can be regulated along contrary rapidly continuously, the intellectuality control of implementation structure vibration.Compare with the viscous fluids damper, have better control effect.
Traditional MR damper needs extra dynamic response sensor to realize close-loop feedback control, and the obvious problem that the introducing of additional sensors causes is to make system more complicated, needs bigger installing space, improves system cost, reduces system reliability.
(3) summary of the invention
The object of the present invention is to provide a kind of additional configuration sensor, reliability height, speed self-sensing magnetorheological fluid damper that cost is low of not needing.
The object of the present invention is achieved like this: it comprises interior seal, cylinder body, piston, external sealed body, inner piston rod, magnetic flow liquid, outer piston bar, interior seal coil, permanent magnet and piston coil, include magnetic flow liquid between cylinder body and the interior seal, be wound with the piston coil on the piston, the end of inner piston rod is a permanent magnet, interior seal and external sealed body lay respectively at the left and right sides of piston, interior seal coil is arranged on the inside of cylinder body or the outside of cylinder body, or cylinder body inside and outside all be provided with in the seal coil.
Speed self-sensing magnetorheological fluid damper of the present invention has following advantage: more succinct based on the control system that this damper is set up owing to not needing the additional configuration sensor, be specially adapted to the limited control system in space.Based on the control system of this damper, cost is lower.Though the cost of this damper is slightly high, owing to need not sensors configured, so the The whole control system cost is more economical.Control system reliability height based on this damper.Traditional control system, sensed system is installed in the outside, and the possibility that produces collision or infiltration, oil impregnate is than higher, and there is not this problem in this damper.Owing to need not to consider the problems such as type selecting of sensor, make that building of control system is easier, also easier controlled system building person pays close attention to.
(4) description of drawings
Fig. 1 is arranged on the structural representation of cylinder interior for seal coil in of the present invention;
Fig. 2 is arranged on the structural representation of cylinder body outside for seal coil in of the present invention;
Fig. 3 for of the present invention cylinder interior and outside be provided with simultaneously in the structural representation of seal coil.
(5) embodiment
The invention will be further described for example below in conjunction with accompanying drawing.
Embodiment 1: in conjunction with Fig. 1, speed self-sensing magnetorheological fluid damper of the present invention, it comprises interior seal (1), cylinder body (2), piston (3), external sealed body (4), inner piston rod (5), magnetic flow liquid (6), outer piston bar (7), interior seal coil (8), permanent magnet (9) and piston coil (10), include magnetic flow liquid (6) between cylinder body (2) and the interior seal (1), be wound with piston coil (10) on the piston (3), the end of inner piston rod (5) is permanent magnet (9), interior seal (1) and external sealed body (4) lay respectively at the left and right sides of piston (3), interior seal coil (8) is arranged on the inside of cylinder body (2) or the outside of cylinder body (2), or cylinder body inside and outside all be provided with in the seal coil.
Embodiment 2: in conjunction with Fig. 1, speed self-sensing magnetorheological fluid damper of the present invention, working principle is as follows: when outer piston bar (7) advances or pulls out cylinder body, seal coil (8) in the permanent magnet (9) of inner piston rod (5) end can advance or pull out, thereby in interior seal coil (8), produce induction electromotive force, by Faraday law of electromagnetic induction as can be known, in the ideal case, this electromotive force is directly proportional with the movement velocity of piston rod.Therefore, just can obtain the movement velocity of piston rod by the situation of change of resolving this induced voltage.
The simple analysis of effect of the present invention:
Suppose: 1, the end permanent magnet of inner piston rod can produce the uniform magnetic field of 0.2T in its cylinder interior on every side; 2, the average diameter of interior seal coil is 80mm; 3, the number of plies that interior seal coil twines is 20 layers, then by Faraday law of electromagnetic induction
E＝BLv
L is the length of lead in the formula, and v is the lead motion speed, and B is the intensity of uniform magnetic field.Can calculate when the movement velocity of piston rod is 0.01m/s, the magnetic induction intensity that can produce between two the end of a thread of coil is approximately:
E＝0.2×(3.14×0.08×20)×0.01＝0.01V
Above very Utopian simple computation just, do not consider the vary in diameter of the nonuniformity in magnetic field and coil and coil along piston rod to the stack problem.But actual conditions and institute simplify calculating and have certain similarity.Calculating for the induction electromotive force of reality can obtain by the magnetic field FEM (finite element) calculation, also can demarcate by concrete actual measurement.
Claims (1)
1. speed self-sensing magnetorheological fluid damper, it comprises interior seal (1), cylinder body (2), piston (3), external sealed body (4), inner piston rod (5), magnetic flow liquid (6), outer piston bar (7), interior seal coil (8), permanent magnet (9) and piston coil (10), it is characterized in that: include magnetic flow liquid (6) between cylinder body (2) and the interior seal (1), be wound with piston coil (10) on the piston (3), the end of inner piston rod (5) is permanent magnet (9), interior seal (1) and external sealed body (4) lay respectively at the left and right sides of piston (3), interior seal coil (8) is arranged on the inside of cylinder body (2) or the outside of cylinder body (2), or cylinder body inside and outside all be provided with in the seal coil; When outer piston bar (7) advances or pulls out cylinder body, seal coil (8) in the permanent magnet (9) of inner piston rod (5) end can advance or pull out, thereby in interior seal coil (8), produce induction electromotive force, by Faraday law of electromagnetic induction as can be known, in the ideal case, this electromotive force is directly proportional with the movement velocity of piston rod, therefore, just can obtain the movement velocity of piston rod by the situation of change of resolving this induced voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100729805A CN101660583B (en) | 2009-09-27 | 2009-09-27 | Speed self-sensing magnetorheological fluid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100729805A CN101660583B (en) | 2009-09-27 | 2009-09-27 | Speed self-sensing magnetorheological fluid damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101660583A CN101660583A (en) | 2010-03-03 |
| CN101660583B true CN101660583B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100729805A Expired - Fee Related CN101660583B (en) | 2009-09-27 | 2009-09-27 | Speed self-sensing magnetorheological fluid damper |
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| CN (1) | CN101660583B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767285B (en) * | 2012-07-11 | 2014-11-12 | 中联重科股份有限公司 | Arm-frame stroke-controlled oil-cylinder device and arm-frame vibration-controlling system |
| CN107084221A (en) * | 2017-05-04 | 2017-08-22 | 西北工业大学 | It is a kind of to remember magnetic structure for magneto-rheological vibration damper |
| CN107505557A (en) * | 2017-08-03 | 2017-12-22 | 中南大学 | Flexible loading test device for microelectronic component |
| CN108386049A (en) * | 2018-01-08 | 2018-08-10 | 同济大学 | A kind of high building structure is from aware distributed toughness disaster prevention system |
| CN108397508A (en) * | 2018-02-14 | 2018-08-14 | 重庆恩光科技有限公司 | Energy saving and environment friendly magnetorheological fluid twin-stage variable damping device |
| CN108374862A (en) * | 2018-02-14 | 2018-08-07 | 重庆恩光科技有限公司 | Energy saving and environment friendly single-stage variable damping buffer |
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2009
- 2009-09-27 CN CN2009100729805A patent/CN101660583B/en not_active Expired - Fee Related
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| CN101660583A (en) | 2010-03-03 |
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Granted publication date: 20110504 Termination date: 20110927 |