A screw compressor with a sealing device and a screw compressor with such a screw compressor

摘要

The scroll compression device includes a first scroll member (11) having a first base plate (13) and a first spiral winding (14); a second volute element (12) having a second base plate (15) and a second spiral winding (16), one of the first and second volute members (11, 12) being configured to perform an orbital motion by relative to the other element of the first and second volute elements, the first and second volute elements (11, 12) meshing with one another and delimiting compression chambers (17); and a sealing device (28) arranged in an end face (19) of the first spiral winding (14) and having a sealing surface configured to cooperate with the second base plate (15). The sealing device (28) is configured to allow fluid flow from an upstream compression chamber to a downstream compression chamber through the sealing surface when the pressure in the upstream compression chamber exceeds the pressure prevailing in the compression chamber. the downstream compression chamber, and the sealing device (28) is configured to prevent fluid flow from a downstream compression chamber to an upstream compression chamber through the sealing surface when the pressure in the downstream compression exceeds the pressure prevailing in the upstream compression chamber.