Patent ID: 8845311
Filing Date: 2014-09-30
Classification: F01C,F04C

Abstract:
1. A screw compressor comprising: a screw rotor having a plurality of helical grooves; a casing containing the screw rotor; a slide valve arranged in an opening of the casing, the slide valve defining at least part of a discharge port from which compressed gas is discharged; and a gate rotor having gates meshing with the plurality of helical grooves of the screw rotor to compress gas in compression chambers and to discharge the gas from the discharge port after being compressed in the compression chambers, the compression chambers being defined by the plurality of helical grooves, the casing, and the gates, the discharge port being divided into a first port and a second port by a first partition wall provided in the slide valve when two adjacent helical grooves of the plurality of helical grooves are open to the discharge port as a result of rotation of the screw rotor, with one of the two adjacent helical grooves being open to the first port and the other of the two adjacent helical grooves being open to the second port, and the casing and the slide valve, in combination, defining a discharge passage arranged to communicate with the discharge port, the discharge passage being formed downstream of the discharge port with respect to a fluid flow direction.