| 摘要 |
Provided is an oil-cooled type screw compressor having a compressor body for compressing a suction gas and discharging the compressed gas. The compressor body comprises rotor shafts mounted individually on screw rotors in a rotor casing and extending to the two sides of the screw rotors, disc-shaped thrust plates for rotating integrally with the rotor shafts, sealing members for sealing the thrust plates rotatably while spacing them from the screw rotors and for defining a first space and a second space on the two sides of the thrust plates, thrust bearings arranged individually in the first space and the second space, an oil feed passage communicating with such one of the first space and the second space as is located on the side to apply a force against the thrust force to the thrust plates when boosted, for establishing the communication between the space inside and an oil feed source, an oil discharge passage communicating with such one of the first space and the second space as is located on the side to apply a force against the anti-thrust force to the thrust plates when boosted, for establishing the communication between the space inside and an oil discharge target, and an oil distribution passage for distributing the oil between the first space and the second space.
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