| 摘要 |
The invention concerns a device for a centrifugal pump impeller to be used when pumping polluted liquids. A cover disc (5) on the impeller (3) opposite the inlet (4) is provided with balancing openings (12) for balancing the axial force. The flow (F2) through said openings is used for rinsing the leading edges (7) of the vanes (6) where pollutions tend to collect. <IMAGE> |
