Importance

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Abstract

A screw compressor for compressing a working medium is designed to be provided with: first and second screw rotors that suck, compress, and deliver the working medium; a first bearing that freely rotatably supports one end side of the first screw motor whose one end side is coupled to a rotating shaft of a power source; a casing that houses the first screw rotor and the first bearing; a shaft sealing member that is located on an opposite side of a tooth profile unit for the first screw rotor relative to the first bearing inside the casing and seals a through hole in the casing, through which a shaft of the first screw rotor coupled to the output shaft of the power source is inserted; a partition wall that isolates the first bearing from the shaft sealing member inside the casing; and a liquid supply route that is provided in the casing and has a first liquid supply opening for supplying a lubricating liquid to the first bearing and a second liquid supply opening for supplying the lubricating liquid to the shaft sealing member.

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First Claim