Patent ID: 6039535
Filing Date: 2000-03-21
Classification: F04D

Abstract:
A fluid machine having a rotary shaft, at least one centrifugal impeller operatively mounted on the rotary shaft, and a casing which is arranged so as to cover the centrifugal impeller;wherein one of said rotary shaft and said centrifugal impeller is provided with one of a plurality of first fins and a plurality of second fins which are spaced from the first fins in an axial direction of the fluid machine and the other of said rotary shaft and said centrifugal impeller is provided with the other of the plurality of first fins and the plurality of second fins, a part of the casing opposing said first fins is configured to be subjected to abradable coating to-be-bitten, and said casing and said first fins define therebetween a clearance which is smaller than a clearance defined between said casing and the second fins.