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|1. (WO2017154771) SCREW COMPRESSOR|
|Applicants:||KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
A screw compressor 1 is provided with: a compressor body 2 in which a screw rotor 3 is accommodated in a rotor casing 4; a motor 6 in which a rotator 6a and a stator 6b are accommodated in a motor chamber 20, the motor 6 for rotationally driving a rotor shaft 21 through use of a motor shaft 31; axial liquid supplying parts 10, 37 provided on an anti-rotor side of the motor shaft 31; a motor shaft cooling part 33 which is a cavity extending in the axial direction inside the motor shaft 31, the motor shaft cooling part 33 for cooling the motor shaft 31 by circulating a cooling liquid through the inside of the cavity thereof; and a liquid outlet part 21d positioned on a rotor side of the motor shaft 31 or a motor 6 side of the rotor shaft 21 and fluidically connected to the motor shaft cooling part 33 so as to extend radially inward from an outlet opening 21f formed in an outer surface of the motor shaft 31 or the rotor shaft 21.