| 摘要 |
A single port pump impeller includes two pump vanes diverging arcuately and radially from a suction eye to form one open expanding chamber, and includes a blocking wall for closing the remaining, opposite expanding chamber. The two vanes are contained within parallel spaced apart shrouds. The shrouds include increased wall thickness regions to dynamically balance the impeller. The blocking wall can include a small aperture for providing a small stream of liquid to flow into the otherwise closed expanding chamber to prevent cavitation at a distal end of an adjacent vane. Alternately, the otherwise blocked expanding chamber can be filled with a solid material having substantially the same weight as the fluid being pumped, e.g., water, to prevent cavitation at the outside edge of one of the adjacent vanes. |
