| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic fluid sealing device (two coaxial shafts) having a smaller outside dimension and a less number of components. <P>SOLUTION: A magnet 23 is buried in an outside rotating shaft 20 provided in a bearing hole 2 of a bearing body 10 to form an outside magnetic circuit 15 and an inside magnetic circuit 25 on the outer peripheral face and on the inner peripheral face of the outside rotating shaft 20, respectively. The magnetic fluid sealing device has magnetic fluid filled in a small gap between the outer peripheral face and the inner peripheral face of the outside rotating shaft 20, contacting each other, for strongly sealing two rotating shafts with the magnetic circuits formed by the magnet 23. As a result, with the rotating shafts journaled to each other in no contact to be rotationally driven, it has a smaller dimension and a less number of components. <P>COPYRIGHT: (C)2007,JPO&INPIT |
