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Patent Searching and Data


Title:
OIL-FREE SCREW COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2018/079196
Kind Code:
A1
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).

Inventors:
TSUBOI NOBORU
NAKAMURA HAJIME
HAMADA KATSUNORI
Application Number:
JP2017/035651
Publication Date:
May 03, 2018
Filing Date:
September 29, 2017
Export Citation:
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Assignee:
KOBE STEEL LTD (JP)
International Classes:
F04C29/02; F04C18/16
Foreign References:
JPH02145695U1990-12-11
JPH0443891A1992-02-13
JP2004044606A2004-02-12
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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