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1. (WO2018079196) OIL-FREE SCREW COMPRESSOR

Pub. No.:    WO/2018/079196    International Application No.:    PCT/JP2017/035651
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sat Sep 30 01:59:59 CEST 2017
IPC: F04C 29/02
F04C 18/16
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
株式会社神戸製鋼所
Inventors: TSUBOI, Noboru
壷井 昇
NAKAMURA, Hajime
中村 元
HAMADA, Katsunori
濱田 克徳
Title: OIL-FREE SCREW COMPRESSOR
Abstract:
An oil-free screw compressor (1) is provided with: a screw rotor (11); a motor (21); a rotor casing (15) that defines a rotor chamber (10a); a motor casing (25) that defines a motor chamber (20a); a connection chamber (30a) provided between the rotor chamber (10a) and the motor chamber (20a); a communication part (32c) that connects the motor chamber (20a) and the connection chamber (30a); a second oil discharge port (32b) that discharges oil from the connection chamber (30a); and an oil line that forcibly circulates a lubricant oil by causing an oil pump (43) to flow the lubricant oil so as to supply the lubricant oil from an oil tank (41) to a second bearing (14), a third bearing (23), and a fourth bearing (24), and to return the lubricant oil to the oil tank (41) via a first oil discharge port (25b) and the second oil discharge port (32b).