| 摘要 |
PROBLEM TO BE SOLVED: To rotate a rotary shaft at high speed without imposing load on bearings by arranging a rotary member between the rotary shaft and a non- rotating part, providing a bearing between the rotary shaft and the rotating member, and providing a bearing between the rotating member and the non- rotating part. SOLUTION: A rotating member (sleeve 87) is arranged between a rotary shaft 84 and a non-rotating part 85. An inner bearing 88 is arranged between the rotary shaft 84 and the sleeve 87. An outer bearing 89 is arranged between the sleeve 87 and the non-rotating part 85. The rotary shaft 84 can be rotated by a drive source 90. The sleeve 87 can be rotated by the drive source 90. For example, the rotary shaft 84 is rotated at 20,000 rpm and the sleeve 87 is rotated at 8,000 rpm. The relative speed of the rotary shaft 84 and the sleeve 87 is 12,000 rpm. The relative speed of the sleeve 87 and the non-rotating part 85 becomes 8,000 rpm. |
