Coupling element for an eccentric screw rotor
AssigneeNETZSCH Pumpen & Systeme GmbH
InventorsMikael Tekneyan, Philipp Nübl, Stefan Weigl, Helmuth Weber, Markus Rosam
Life of this patent
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Abstract
A coupling element for connecting a helix-shaped eccentric screw pump rotor to a drive shaft, with a drive shaft receiving portion and a rotor connecting portion arranged at an opposite end of the coupling element from the drive shaft receiving portion, the rotor connecting portion is constituted as a hollow cylinder for receiving a rotor end of the screw pump rotor, wherein the hollow cylinder has at least two inner circumferential surfaces which are complementary to the rotor and have a radius which is fixed with respect to the cross-sectional center of the hollow cylinder.
Claims15
A coupling element for connecting a helix-shaped eccentric screw pump rotor to a drive shaft, comprising:
- a drive shaft receiving portion, and
- a rotor connecting portion arranged at an opposite end of the coupling element from the drive shaft receiving portion,
- the rotor connecting portion is constituted as a hollow cylinder for receiving a rotor end of the screw pump rotor,
- wherein the hollow cylinder has at least two inner circumferential surfaces which are complementary to the rotor and have a radius which is fixed with respect to the cross-sectional centre of the hollow cylinder,
- wherein at least one surface section with a larger inner radius than the radius is present between the inner circumferential surfaces.
A rotor connecting device, comprising:
- a helix-shaped eccentric screw pump rotor, and
- a coupling element for connecting the helix-shaped eccentric screw pump rotor to a drive shaft, having a drive shaft receiving portion and a rotor connecting portion arranged at an opposite end of the coupling element from the drive shaft receiving portion,
- the rotor connecting portion is constituted as a hollow cylinder for receiving a rotor end of the screw pump rotor,
- wherein the hollow cylinder has at least two inner circumferential surfaces which are complementary to the rotor and have a radius which is fixed with respect to the cross-sectional centre of the hollow cylinder
- wherein at least one surface section with a larger inner radius than the radius is present between the inner circumferential surfaces.
Dependencies are inferred from the claim text.