| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbo type high speed rotary apparatus capable of removing a lip seal material constricting a seal mechanism of a gas compression chamber and a motor chamber from a rotary shaft at a time of balance test. SOLUTION: A bearing retaining member 8 for retaining an upper bearing 5 is provided on a housing 1. A seal plate 9 equivalent to a partition wall is mounted thereon and is installed on the housing. A rotary shaft 4 is provided to penetrate through a through hole 9H of the seal plate 9. The lip seal material 10 is attached inside of the through hole 9H of the seal plate 9, and an inner end thereof abuts on an outer circumference surface of the rotary shaft 4 as shown on a figure. A small diameter part 4K of an annular recess part is formed in an upper vicinity of the rotary shaft 4 on which the lip seal material slides. When the rotary shaft 4 displaces and the lip seal material 10 positions at the small diameter part 4K, contact with the rotary shaft 4 is cut off. COPYRIGHT: (C)2006,JPO&NCIPI
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