ROTATION BRAKING DEVICE USING FLUID WITH MAGNETIC VISCOSITY
摘要
<p>Disclosed is a rotation braking device for a rotor, comprising: a rotor which rotates axially relative to a housing; a magnetic disk conjoined with the rotor; and an electromagnet disposed so as to sandwich the disk and provide gaps therearound, which when power is supplied provides a magnetic circuit in the direction in which the disk is sandwiched. The disk of the rotation braking device for a rotor holds fluid with magnetic viscosity in the gaps between the rotor and the like and the housing and the like. The end parts of the gaps positioned outside of the turning radius of the rotor are physically sealed, and the end parts on the opposite side are sealed by the provision of a permanent magnet which provides magnetic force to fluid with magnetic viscosity held in the vicinity.</p>
