| 摘要 |
There is disclosed herein an impeller for a centrifugal pump such as water pumps for automotive internal combustion engines or a centrifugal pump for liquids other than water. The impeller has a circular base and a series of similar vanes extending vertically from the base. Each vane extends rearwardly from its inner end to its outer end with respect to the direction of rotation of the rotor and is wider at its midpoint than its ends. The leading edge of each vane is concave at least at its inner end while the trailing edge of each vane is convex.
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