Patent ID: 6572354
Filing Date: 2003-06-03
Classification: F04C

Abstract:
Screw compressor comprisinga compressor screw housing, a closure wall at an outlet side of said housing, two screw rotors with intermeshing screw bodies arranged in said compressor screw housing, shaft sections arranged on both sides of said screw bodies, said screw rotors being mounted by means of said shaft sections in bearing housings arranged on both sides of said compressor screw housing, a seal preventing parasitic flow of compressed working medium between (i) an intermediate portion of the respective shaft section adjoining an end of the respective screw body at a pressure side and extending as far as a bearing section and (ii) an inside surface of an opening provided in said closure wall and surrounding said intermediate portion, said seal being arranged essentially in close proximity to an edge of the corresponding opening facing the respective screw body, within a third of an extension in a direction of an axis of rotation of the opening adjoining said edge facing the respective screw body, and an indentation provided in said intermediate portion adjacent to the end of the respective screw body at the pressure side and located opposite an edge of said opening, said seal comprising a sealing ring seated in a groove and movable radially in relation to said groove.