| 摘要 |
<p>An impeller for a rotary fluid machine of centrifugal type is disclosed which is adapted to be constructed as a liquid pump or gas compressor. The impeller comprises a disc having a boss which is fitted on a drive shaft, and a plurality of blades which are uniformly spaced apart circumferentially and axially projecting from at least one side of the disc. Each blade has a front and a rear surface, and a fluid path is defined between the front surface of a blade and the rear surface of an adjacent blade. The fluid path is distributed in a region from around the boss and extending to the outer periphery of the disc. the width of the fluid path decreases gradually from around the boss toward the outer periphery of the disc, but the fluid path has a constant depth. The front and the rear surface of each blade are substantially distributed on arcs having different radii of curvature which are struck from a common center point. Center points associated with different blades are disposed on a single imaginary circle which is concentric with the disc. </p> |
