| 摘要 |
<P>PROBLEM TO BE SOLVED: To materialize lubricating oil having sufficient wear resistance and provided at low cost in relation to lubricating oil used for a screw compressor and containing silicone oil as primary ingredient. Ž<P>SOLUTION: This lubricating oil is retained in the oil cooled screw compressor comprising a pair of mutually meshing rotors 2a, 2b, and lubricates and cools meshing parts of both of the rotors 2a, 2b and each of the bearing. Such lubricating oil contains silicone oil as the primary ingredient, is mixed with three or more kinds of mineral oil having different viscosity. In the concrete, mineral oil having kinematic viscosity at 40°C equivalent to VG220 in ISO viscosity grade, mineral oil equivalent to VG 32-68, and mineral oil equivalent to VG 10 are contained. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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