| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal fluid machine that can reduce a shaft thrust load.SOLUTION: A centrifugal fluid machine includes: a casing; a disk-like hub stored in the casing, rotates on a surface vertical to a rotary shaft, and includes a back surface facing the casing; and an impeller having a plurality of vanes fixed to an opposite back surface of the hub, from an outer circumference of which working fluid flows and in which the working fluid is flowed out to an opposite direction of the back surface of the hub. A ring-shaped member is provided on a surface facing the back surface of the hub of the casing to be operable toward the back surface of the hub. |
