Hitachi, Ltd.

Hiroki Osumimoto

Atsushi Watanabe

Hirotaka Kameya

Shigekazu Nozawa

Masayuki Urashin

Takeshi Hida

In an oil-mist separator included by a compressor, an inlet passage directs a flow axis of a mixture gas including a mist of lubrication oil and a gas to be taken out of the compressor with a pressurized condition when the mixture gas reaches a chamber, and a discharge port for discharging the gas from the chamber opens in the chamber.

Compressor with oil-mist separator

The screw compressor according to the invention is provided with a main casing having male and female rotors , a discharge casing having a discharge passage for compressed gas discharged from the rotors, and an oil reservoir for accumulating oil separated from the compressed gas. The discharge casing is provided with a cylindrical oil separating space section formed therein so as to communicate with the discharge passage, which discharge passage is connected in a tangential direction of the oil separating space section. Further, a discharge port is provided so as to communicate with the oil separating space section, and a cylindrical member is further provided in the oil separating space section so as to be concentric therewith. The oil separating space section and the oil reservoir are connected to each other through a communication passage having a cross-sectional area smaller than that of the oil separating space section.

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Shimizu, Japan

Hiroki Osumimoto