| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration in viscosity of grease, prevent the volume of the grease from decreasing over time, reduce maintenance, and reduce maintenance costs in an oilless natural gas compressor using a bearing having the grease encapsulated therein. SOLUTION: This natural gas compressor uses the oilless bearing having the grease encapsulated in rotary bearing parts 3, 12. The grease encapsulated in the bearing has a PFPE system as a base material expressed by F-[CF(-CF<SB>3</SB>)-CF<SB>2</SB>-O]<SB>n</SB>-CF<SB>2</SB>CF<SB>3</SB>(n=7 to 60 in the expression), and contains PTFE as a thickener, and sodium nitrite as an additive. COPYRIGHT: (C)2008,JPO&INPIT
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