| 摘要 |
The invention concerns a pump 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 (4) provided with one or several vanes (5) the leading edges (6) of which being strongly swept backwards . One or several feeding grooves (8) being arranged in the surrounding pump housing (1) in a surface (7) opposed said vanes. <IMAGE> |
