Hitachi Techno Engineering Co., Ltd.

Megumi Kawai

Kenichi Takahashi

Hiroyasu Obata

Hiroyuki Matsuno

A method of adjusting the engaged clearance between rotors of a screw compressor which has a male rotor and a female rotor inside a casing, both of the rotors being rotated while maintaining a required very small clearance using timing gears fixed individually to the rotors through shrink fitting, wherein the very small clearance between the rotors is set to a required value by loosening the shrink fitting between one of the timing gears and the rotor on which the one of the timing gears is mounted, while movement of the other of the timing gears is being restricted; and intermittently applying torques to the rotor on which the one of the timing gears is mounted using a servo motor. In this way, it is possible to obtain a screw compressor in which a very small clearance between the rotors can be set to a required value in a short time, and in which high reliability in the symmetrizing adjustment and a high compressing performance can be obtained.

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Ebina, Japan

Megumi Kawai