AN IMPELLER FOR A CENTRIFUGAL PUMP, A CENTRIFUGAL PUMP AND A USE THEREOF

摘要

The present invention relates to an impeller (40) for a centrifugal pump, a centrifugal pump and a use thereof. The present invention relates especially to a novel closed impeller (40) structure for a centrifugal pump. The impeller (40) is characterized by pump-out vanes (48) on the rear shroud and pump-out vanes (50) on the front shroud (44). The front pump-out vanes (50) are dimensioned according to a specific formula. The centrifugal pump utilizing the impeller (40) of the present invention is suitable for pumping both clean liquids and solids-containing liquids like for instance fibrous suspensions of pulp and paper or board industry.