ASSEMBLY FOR REDUCING FRICTION LOSS IN A PROPELLER OR TURBINE IN A CURRENT OF WATER

摘要

Assembly for use as a ship propeller (11) or a turbine in a current of water, comprising a propeller section (15) with at least one propeller blade (15a), a rotor part (25) arranged about and co-rotating with the propeller section (15), which rotor part (25) in its periphery comprises magnet devices (27) or windings for the generation of magnetic fields, so that the rotor part (25) constitutes the rotor of an electric motor and/or generator. The assembly further comprises a stator part (23) that surrounds the rotor part (25), which stator part (23) comprises magnet devices or windings (29) for generation of magnetic fields. The assembly is adapted for the supply of gas in at least one gap (31) between the rotor part (25) and the stator part (23), for displacement of any liquid in the gap (31) for the reduction of frictional forces in the gap (31) during rotation of the rotor part (25) in relation to the stator part (23).