Method for adjusting engaged clearance between rotors of screw compressor and apparatus therefor

摘要

The present invention relates to a method of adjusting engaged clearance between rotors (2,3) of a screw compressor comprising a male rotor (2) and a female rotor (3) inside a casing (1), both of the rotors being rotated while maintaining a required very small clearance by timing gears (10,11) fixed individually to the rotors through shrinking, wherein the very small clearance between the both rotors is set to a required value by loosing the shrinking between one of the timing gears (10) and the rotor (2) fixing the one of the timing gears while the other of the timing gears is being restricted; and intermittently applying torques to the rotor fixing the one of the timing gears through a servo motor (24).;According to the present invention, it is possible to obtain a screw compressor in which the very small clearance between the rotors can be set to a required value in a short time, and which is high in the reliability of symmetrizing adjustment and high in the compressing performance.