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 (1) provided w ith one or several vanes (2) the leading edges (3) of which being strongly swept bac kwards. The size of the sweep angle (.alpha.) varies between 35 and 65 degrees at th e connection with the hub (1) and 55 and 85 degrees at the periphery (5)
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