Rolls-royce Akteibolag

Rolls-royce Aktiebolag

Kongsberg Maritime Sweden Ab

Per Nahnfeldt

Gunnar Styrud

Anders Lobell

Andreas Eriksson

Joakim Karas

Oliver Nailard

Jörgen Persson

A method and a device for protecting an electric motor in a pod unit for propulsion of marine vessels against shaft bending shocks when the blades of the pod propeller hit ice blocks or other hard objects, said motor having a drive shaft, a rotor and a stator, said shocks tending to momentarily bend the drive shaft () to such an extent that the rotor () will come into contact with the stator. The rotor is prevented from coming in detrimental contact with the stator by providing at least two members, which together form a radial plain bearing having mating arcuate bearing surfaces, which during normal operation of the motor are spaced from one another by a gap and come in contact with one another only at extreme loads with short durations.

Method of and a device for protecting a motor in a pod against shaft bending shocks

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Karlstad, Sweden

Per Nahnfeldt