Hitachi Industrial Equipment Systems Co., Ltd.

Yuki Ishizuka

Toshiaki Yabe

Masayuki Kasahara

Yuuji Itou

Kazumasa Kanai

Sho Nikaido

Compressor

Provided is a multi-stage screw compressor with which an intermediate shaft section of a rotor can be made shorter. A two-stage screw compressor includes a front-stage compressing mechanismwhich has a front-stage male rotorA and a front-stage female rotorB, and which compresses air, and a rear-stage compressing mechanismwhich has a rear-stage male rotorA and a rear-stage female rotorB, and which further compresses the air compressed by the front-stage compressing mechanism. The front-stage male rotorA and the rear-stage male rotorA are configured to be coaxial, and the front-stage female rotorB and the rear-stage female rotorB are configured to be coaxial. An axial delivery pocketof the front-stage compressing mechanismand an axial intake pocketof the rear-stage compressing mechanismare arranged in a positional relation of partly overlapping with each other in the axial direction of the rotor, and are separated from each other by a separating wall

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Tokyo, Japan

Yuki Ishizuka