Patent ID: 6162015
Filing Date: 2000-12-19
Classification: F04D,F05D

Abstract:
A centrifugal type fluid machine comprising: a radial impeller which is attached to a main shaft and which rotates together with said main shaft, a diffuser which is located on an outer periphery of said radial impeller and guides a flow of a fluid coming out of said radial impeller so that it is directed outward to recover static pressure, a diffuser vane formed on said diffuser, and a stage which forms a bent passage for guiding an outward flow coming out of said diffuser to an inward flow and a return passage for gathering inward the flow coming out of said bent passage and for guiding it to an inlet of a radial impeller of the next stage, which are mounted in multiple stages in the axial direction; characterized in thatsaid diffuser vane is formed so that a vane outlet angle at a side plate end of a plurality of stages of said diffuser is larger than a vane outlet angle at a core plate end.