MAGNETIC FLUID DAMPER BASED ON PRINCIPLE OF SECONDARY BUOYANCE

To provide a magnetic fluid damper in which a permanent magnet is hardly crushed, is easy to process, and has a high vibration absorbing effect.SOLUTION: There is disclosed a magnetic fluid damper based on the principle of secondary buoyance and having a plurality of permanent magnets 210, 220 and a porous medium member 310 inside a housing 100 defining a cavity, in which the porous medium member 310 is located between two adjacent permanent magnets 210, 220 in a first direction, and voids of the porous medium member 310 are filled with a magnetic fluid 610. The magnetic damper includes a plurality of restoration parts 410, 420 in which restoring forces received by the two permanent magnets are not equal. The magnetic fluid damper based on the principle of secondary buoyancy according to an embodiment of the present invention has an advantage that the vibration absorption effect is good and the vibration absorption effect is stable.SELECTED DRAWING: Figure 1 【課題】永久磁石が破砕されにくく、加工がしやすくかつ振動吸収効果が高い磁性流体ダンパを提供する。【解決手段】キャビティを画定する筐体１００の内部に、複数の永久磁石２１０、２２０及び多孔質媒体部材３１０を有する。多孔質媒体部材３１０が、第１の方向において隣接する２つの永久磁石２１０，２２０の間に位置し、多孔質媒体部材３１０の空隙に磁性流体６１０が充填されている。２つの永久磁石が受ける復元力が等しくない複数の復帰部４１０、４２０と、を含む二次浮力の原理に基づく磁性流体ダンパーを開示する。本発明の実施例に係る二次浮力の原理に基づく磁性流体ダンパーは、振動吸収効果が良く、振動吸収効果が安定しているという利点がある。【選択図】図１