To provide a screw compressor having a high gas leakage suppressing effect.
The screw compressor includes a radial seal portion C in which a screw rotor 2 and a bearing holder 6 are opposed to each other in the radial direction, and a thrust seal portion D in which the screw rotor 2 and the bearing holder 6 are opposed to each other in the axial direction. A screw seal 10 for generating the pumping action in the direction toward a high-pressure area of an outer circumferential portion from the low-pressure side as the screw rotor 2 is rotated is provided on an outer circumferential surface of a high-pressure side shaft end portion 4 of the screw rotor 2 in the radial seal portion C. A surface groove 20 for forming an oil seal to suppress leakage of refrigerant gas to the low-pressure side is formed in one of opposing surfaces of the thrust seal portion D.
Kiyoshi Yasushima
Takanashi Norio
Motoki Shandong
Taku Ogawa
Murata Kensei
Moto Otani