COUPLING ELEMENT FOR AN ECCENTRIC SCREW ROTOR

摘要

The invention relates to a coupling element (10, 100) for the connection of a helix-shaped eccentric screw pump rotor (50) to a drive shaft, comprising a drive shaft receiving portion (11) and an oppositely arranged rotor connecting portion (10a), which is designed in the form of a hollow cylinder (12, 112) for receiving a rotor end (50a), the hollow cylinder (12, 112) comprising at least two inner circumferential surfaces (B) which are complementary to the rotor (50) and have a radius (R2) which is determined in relation to the cross-sectional center of the hollow cylinder (12, 112).