SCREW COMPRESSOR Russian patent published in 1994 - IPC

FIELD: manufacture of compressors. SUBSTANCE: mounted in working chamber of housing in sliding bearings are drive and driven rotors forming the end chambers on the suction end between bearing and rotor; end chambers are connected with pressure source for unloading the rotors of axial forces. One of rotors is made stepped forming together with bearing the circular and end chambers isolated from each other. One chamber is brought in communication with the high-pressure source and other chamber is brought in communication with low-pressure source. Isolated circular chamber of driven rotor and end chamber of drive rotor are brought in communication with the high-pressure source. End chamber of driven rotor is brought in communication with the low-pressure source. EFFECT: enhanced reliability. 2 cl, 3 dwg