Impeller of a centrifugal pump comprises blades whose profiles perpendicular to their longitudinally running center lines are approximately trapezium-shaped

摘要

The impeller (1) of a centrifugal pump comprises blades (2) whose profiles perpendicular to their longitudinally running center lines are approximately trapezium-shaped. The convex blade surfaces (4) are describable by a plurality of straight lines parallel to the impeller axis (10).