Hitachi Industrial Equipment Systems Co., Ltd.

Sho Nikaido

Takeshi Tsuchiya

Kotaro Chiba

Kohei Sakai

Toshiaki Yabe

Masayuki Kasahara

Yuki Taniyama

Shotaro Sano

Yuki Ishizuka

A suction flow path of a screw compressor includes a male-side flow path that opens in an axial direction with respect to working chambers in a suction process on the male rotor side and extends from a starting end positioned on one side of a virtual plane to a first termination end positioned on the other side; and a female-side flow path on the female rotor side that extends from the starting end to a second termination end positioned on the other side of the virtual plane. The male-side or the female-side first flow path wall is configured such that at least a partial area in a range from the starting end to the first or the second termination end is closer to a male-side or female-side rotor lobe section from the starting end side toward the first or second termination end side.

Screw compressor with improved suction flow

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

Multi-stage screw compressor

Growing community of inventors

Tokyo, Japan

Sho Nikaido