| 摘要 |
PURPOSE:To simplify constitution by providing a permanent magnet so that energizing force to push a rotary member in the specified axial direction may increase in association with increase in its displacement in the specified direction, and providing the rotary member and a support member with a superconductive member and a permanent magnet. CONSTITUTION:A pair of annular permanent magnets 6, 7 are arranged at the relatively opposite positions at the inside of a turbo blade mounting part 3 and a fixation member 5, while even on a lower end side of a rotary shaft 2 a pair of annular permanent magnets 8, 9 are arranged at the relatively opposite position between the side of a shaft 2 and the side of the fixation member 5. These magnets 6...9 support a rotary member 1 in the axial direction with their repellent force. The lower permanent magnet 9 on the side of the fixation member 5 is mounted on a freely swinging member 11 which is mounted on the fixation member 5 through a damper 12 such as of rubber, magnetic fluid, vacuum grease and the like. It is thus possible to ensure rigidity in carrying out supporting in the axial direction while improving damping performance. |
