| 摘要 |
<p>The invention concerns a pump impeller of a centrifugal- or a half axial type meant to pump liquids, mainly sewage water. According to the invention, the pump impeller comprises a hub (1) provided with one or several vanes (2) the leading edges (3) of which being strongly swept backwards . The size of the sweep angle ( alpha ) varies between 35 and 65 degrees at the connection with the hub (1) and 55 and 85 degrees at the periphery (5) <IMAGE></p> |
