Patent ID: 6540480
Filing Date: 2003-04-01
Classification: F04D

Abstract:
A compressor comprising a housing defining an inlet and an outlet, and an annular imperforate compressor wheel having an outside diameter and mounted for rotation about an axis within a chamber defined by the housing between the inlet and the outlet, the front of the compressor wheel facing said inlet and a portion of the back of the compressor wheel being set into an annular recess defined by a wall of said housing, said compressor wheel having a plurality of blades extending from the front side of said compressor wheel, the outside diameter of the recess being greater than the outside diameter of the recessed portion of the compressor wheel defining an annular clearance gap around the recessed portion of the compressor wheel, wherein the outside diameter of the recess is at least 1.05 times the outside diameter of the recessed portion of the compressor wheel.