| 摘要 |
Upper and lower thrust bearing faces and a peripheral radial bearing face are formed to surround peripheral and end portions of a disk provided to a rotating shaft supported by a fluid bearing. Pressurized fluid is supplied to the respective bearing faces from first to third fluid passages to thereby form fluid bearing faces. In order to rotate the rotating shaft, the pressurized fluid is supplied to all the passages to keep the rotating shaft and the disk from contact with a bearing member. In order to brake the rotating shaft, fluid supply to the second passage is interrupted. Thus, the rotating shaft is moved down by pressure on the bearing face on the first passage side and, as a result, the brake member comes in contact with the static portion to apply the brakes.
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