Hitachi Industrial Products, Ltd.

Hitachi, Ltd.

Takuma Ueno

Hitoshi Yamamoto

Tetsuya Yoshida

Kazuyuki Yamaguchi

Taiju Katayama

Shichao Peng

Leakage of a working fluid from a shaft sealing device of a turbomachine which handles a liquid as the working liquid is reduced and also unstable fluid force which acts on a rotor is reduced. For this purpose, the turbomachine has a rotor having an impeller, a bearing which rotatably supports the rotor, a casing which contains the rotor therein and forms a stationary flow passage, and the shaft sealing device which reduces the leakage of the working fluid through a gap part between the casing and the rotor. The working fluid is a liquid. A plurality of axial grooves which are intermittently arranged in axial direction and circumferential direction of the rotor with a land part being interposed are provided in an inner circumferential surface of the shaft sealing device.

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Tokyo, Japan

Takuma Ueno