ROTARY COMPRESSOR

PURPOSE:To suppress shaft vibration so as to reduce noise by making the direction where magnetic attraction applied to a shaft by the electromagnetic force of a motor is made minimum orthogonal to the direction of load force applied to the shaft by compression so as to make a chamber supporting part direction coincide with the direction of resultant force of the above two. CONSTITUTION:Taking into consideration for a chamber 2 which becomes a sounding body the direction of magnetic attraction generated by electromagnetic force and the direction of load force generated by load drive and the direction of actual shaft vibration caused by gyro effect where a shaft 7 receives load force while rotating, positional relationship is determined so that the effect of two external forces applied to the shaft 7 is made minimum, in order to reduce the vibration of the shaft 7. It is thus possible to reduce the vibration of the chamber 2 and further make the direction of chamber vibration generated by two external force coincide with the supporting direction of the chamber 2 for the purpose of making the resultant force direction of two external forces meet the supporting direction of the chamber 2, so as to absorb vibration in a supporting system and reduce vibration and noise caused by in the vibration of the shaft.