Centrifugal pump has blade whose region adjoining inlet edge has higher elasticity than remaining area in order to bend out from rest position through flow forces

摘要

The pump has at least one bladed rotor wheel (1) where the region (6) of the blades (3) adjoining the inlet edge (7) has a higher elasticity than the remaining area (8) so that the higher elastic region can be bent out from its rest position through the flow forces. The region of higher elasticity can be up to half the length of the blades. The bending region of the blades can be made from a high polymer plastics or rubber material.