| 摘要 |
PROBLEM TO BE SOLVED: To provide high performance and reliability by securing an oil feeding amount to an auxiliary bearing and reducing stirring loss by a rotating shaft and the auxiliary bearing, in a fluid compressor. SOLUTION: This fluid compressor 1 is equipped with a closed vessel 70 having an oil reservoir 73 for storing lubricating oil 74 in the bottom part; a compression mechanism part 2 and an electric motor part 60 accommodated in the closed vessel 70; the rotating shaft 30 that vertically connects the compression mechanism part 2 and the electric motor part 60; a main bearing 41 and the auxiliary bearing 83 that support the rotating shaft 30 in both the upper and lower sides of the electric motor part 60; an auxiliary bearing supporting member 82 for supporting the auxiliary bearing 83; and an oil feeding pump 90 attached to the auxiliary bearing supporting member 82 and driven by the rotating shaft 30. The rotating shaft 30 has oil feeding paths 32, 43, 33 for supplying the lubricating oil 74 supplied from the oil feeding pump 90 to the auxiliary bearing 83. The auxiliary bearing supporting member 82 and the oil feeding pump 90 form an inner space 86 communicated with the auxiliary bearing 83 around the periphery of the rotating shaft 30, and have a passage 87 communicating the inner space 86 with the oil reservoir 83. COPYRIGHT: (C)2005,JPO&NCIPI
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