| 摘要 |
An impeller (126) for a centrifugal pump (120) includes a radially inner hub (136), and a plurality of blades (130) extending straight and along a direction that is perpendicular to a rotational axis of the impeller (126). The blades (130) extend from a radially outer end to a radially inner end, and define a generally frustoconical envelope. A flow control feature (132) having a curved upper surface is formed between the radially inner end of the blades (130) and the hub (136). There is additional material (140) on a rotationally trailing side of the blades (130) and the flow control feature (132), such that the trailing side additional material (140) adds to the thickness of each of the blades (130) and the control feature (132). The control feature (132) is of a generally uniform thickness. |
