CENTRIFUGAL COMPRESSOR AND SUPERCHARGER WITH THE SAME, AND OPERATION METHOD FOR CENTRIFUGAL COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a centrifugal compressor which lowers metal temperature by cooling an impeller while securing sealability of a labyrinth seal part, and a supercharger with the same.;SOLUTION: In a centrifugal compressor including an impeller 20 which rotates on an axis L and a labyrinth seal part 1 which seals the part between a wall part positioned on the back side of the impeller 20 and the back of the impeller 20, the labyrinth seal part 1 has labyrinth grooves which are a plurality of circumferential grooves centering on the axis L, and at least one of the plurality of labyrinth grooves has a cooling hole for circulating a cooling medium.;COPYRIGHT: (C)2014,JPO&INPIT