| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw compressor having tooth thickness of a female rotor on a discharge port side thicker than that on a suction port side. SOLUTION: In this screw compressor, air sucked from a suction port 5 is discharged from a discharge port 7 by the female rotor 3 and a male rotor 4 having mutually engaged teeth 3b and teeth 4b. Tooth thickness of a plurality of teeth 3b provided on the female rotor 3 is formed to be thicker on the discharge port 7 side than that on the suction port 5 side. Since groove volume on the suction port 5 side is increased, theoretical suction volume is increased, relative leakage of compressed air from a groove 2c in compression to the suction port 5 side is reduced, and thereby high performance of the screw compressor is contrived and the teeth 3b of the female rotor 3 are hardly bent by a pressure difference between grooves. As a result, galling and baking generated by mutual contact of the teeth 3b and teeth 4b can be prevented. COPYRIGHT: (C)2004,JPO
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