| 摘要 |
The invention concerns a pump impeller of a centrifugal- or a half axial typ e meant to pump liquids, mainly sewage water. According to the invention, the pump impeller comprises a hub (4) provided w ith one or several vanes (5) the leading edges (6) of which being strongly swept bac kwards. The periphery (8) of the leading edge is displaced 125-195 degrees relative to its connection (7) to the hub (4). |
