Rim-driven propulsion pod arrangement

Details Rim-driven propulsion pod arrangement Rim-driven propulsion pod arrangement

2005-01-04

2005-01-04

Olson, Lars A. (Department: 3617)

Marine propulsion

Electric drive for propelling means

C310S087000

Reexamination Certificate

active

06837757

ABSTRACT:
In the embodiments described in the specification, a rim-driven propulsion pod arrangement has a cylindrical housing with a duct providing a flow path for water and a rotor assembly supported from a central shaft and containing a rotating blade row and driven by a rim drive permanent magnet motor recessed in the housing. An array of vanes downstream from the rotating blade row is arranged to straighten the flow of water emerging from the rotating blade row. Radial bearing members on the rotor have a hardness less than that of the shaft on which the rotor is supported and relatively soft protrusions are provided in the space between the rotor and the housing to limit excursion of the rotor. A thrust bearing has wedges arranged to form a water wedge between facing surfaces of the rotor and the rotor support during rotation of the rotor.

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