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US 4,780,066 AGranted
Centrifugal pump having a magnetic coupling
AssigneeSulzer Brothers Limited
InventorsUlrich Bolleter, Erich Klaui
Life of this patent
Estimating the term…
Abstract
The centrifugal pump has a pump rotor unit which is housed within an impeller chamber and which is driven by a permanent magnet coupling having magnetic pole units and pole shoes outside the impeller chamber. The pole shoes define a gap into which an annular part of an end cover of the pump housing projects and into which a magnetizable annular part of the pump rotor unit projects to complete the magnetic flux circuit.
Claims17
A centrifugal pump comprising
- a pump rotor unit disposed within an impeller chamber;
- a permanent magnet coupling for driving said rotor unit, said coupling including a pair of magnetic pole units outside said impeller chamber and defining an annular gap therebetween and a magnetizable part on said rotor unit inside said impeller chamber and within said annular gap to complete a magnetic flux circuit;
- and
- a cover between said rotor unit and said pole units closing said impeller chamber and having an annular pocket receiving said magnetizable part of said rotor unit.
1 more element
A centrifugal pump comprising
- a pump rotor unit disposed within an impeller chamber;
- a permanent magnet coupling for driving and rotor unit, said coupling including a pair of permanent magnet pole units outside said impeller chamber and defining an annular gap therebetween and a magnetizable part on said rotor unit inside said impeller chamber and within said annular gap to complete a magnetic flux circuit;
- and
- having an annular pocket receiving said magnetizable part of said rotor unit.
1 more element
A centrifugal pump comprising
- a pump rotor unit disposed within an impeller chamber;
- a permanent magnet coupling for driving said rotor unit, said coupling including a pair of magnetizable pole shoes outside said impeller chamber and defining an annular gap therebetween, a common permanent magnet ring of permanent magnetic material connected to said pole shoes and a magnetizable part on said rotor unit inside said impeller chamber and within said annular gap to complete a magnetic flux circuit;
- and
- a cover between said rotor unit and said pole shoes closing said impeller chamber and having an annular pocket receiving said magnetizable part of said rotor unit.
1 more element
Dependencies are inferred from the claim text.