Patent ID: 6736594
Filing Date: 2004-05-18
Classification: F01D,F04D

Abstract:
An axial-flow type hydraulic machine, comprising:a casing, in which an axial flow impeller having a plural number of blades is disposed in a freely rotatable manner; a casing liner being provided on an inner surface of said casing in an axial direction, in a freely rotatable manner; and a plural number of flow passages being formed on the inner surface of said casing liner aligning in peripheral direction thereof, for connecting between an inlet side of said impeller and an inside of blade residing region in a pressure gradient direction, wherein said casing liner is movable in the axial direction, so as to changing said flow passages in position thereof, to vary an interference length defined between said impeller, whereby making flow rate of fluid flowing in said flow passages into the pressure gradient direction being adjustable.