| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw compressor reducing tooth face separating vibrations. SOLUTION: The screw compressor includes a bore portion covering the tooth parts of a male rotor and a female rotor, a plurality of actuating chambers formed by the male tooth groove of the male rotor and the bore portion of the female tooth groove of the female rotor, a discharging port provided on a side discharging compressed gas in the bore portion, and a recessed portion provided on a side discharging the gas in the bore portion and at a different position from the discharging port. On the discharging side end surface of the gas, the male rotor and the female rotor have a positional relationship wherein the contacting points of the male rotor and the female rotor exist one place on a forward moving surface and two places on a backward moving surface. When the distance from the rotation center of the female rotor to the forward moving surface is larger than the distance from the rotation center of the female rotor to a contact portion on a side close to the female rotor on the backward moving surface, the communication area of the actuating chamber and a recessed portion which are made from the contact point on the forward moving surface and the contact point on the side close to the female rotor on the backward moving surface, is larger than the communication area of the actuating chamber and the discharging port which are made from the contact points at two places on the backward moving surface. COPYRIGHT: (C)2011,JPO&INPIT
|
