Patent ID: 6022203
Filing Date: 2000-02-08
Classification: F04C

Abstract:
A variable displacement screw-type compressor comprising at least one primary rotor and at least one secondary rotor arranged in a common housing (12), said primary and secondary rotors being in mesh with each other for conveying a medium under compression from an inlet channel (62) to an outlet channel, the inlet channel (62) being delimited by at least one housing segment (38, 40, 42, 44) slidable in the housing (12), a sealing side of the segment facing the rotors and following a flow envelope defined by the rotors, said at least one housing segment (38, 40, 42, 44) being guided and slidable in a well (46) disposed transverse to axes (26, 28) of said rotors, the housing segment (38, 40, 42, 44) being biased by a spring (84, 86), and a control cam (88, 90, 92, 94) being provided for displacing the housing segment (38, 40, 42, 44) against the bias of the spring (84, 86).