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Fluid compressor
申请号	JP29488189	申请日	1989-11-15	公开(公告)号	JPH03160186A	公开(公告)日	1991-07-10
申请人	Toshiba Corp;			发明人	IRINO YASUMI;
摘要	PURPOSE: To obtain a proper oil film thickness at all times at what uses polyalkylene glycol(P A G) which is synthetic lubricating oil, as refrigerating machine oil for a liquid compressor, by setting a size condition between a rotary shaft and a bearing portion so that this condition may satisfy a specific expression. CONSTITUTION: A rotary compressor 1 is made up by housing within a sealed container 2 which is laid horizontally a rotary compression mechanism portion 3 and a motor drive mechanism portion 4 driving the portion 3. Also, a pump device 17 utilizing the drive force of a blade 14 is provided on the back side of the blade 14 provided appearably/disappearably at a compression mechanism portion 3 rotor 13. And P A G housed within the sealed container 2 is pumped up by the operation of this pump device 17, and supplied to such sliding portions as bearing portions 8, 10a. In this instance, when a radius clearance size between a rotary shaft 7 and the bearing 8 is C2 and the total surface roughness of the inner periphery surfaces of the rotary shaft 7 and the bearing portion 8 is So, the rotary shaft 7 and the bearing 8 are constituted under a size condition that satisfies the expression of C2≤2So. COPYRIGHT: (C)1991,JPO&Japio
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