Cooling unit for one or two rotors of one or two electric motors arranged in gondola to drive propellers, has supply pipe for cold water in propeller cap and radial bores or pipes to heat source

摘要

The cooling unit has a supply pipe (3) for cold water arranged centrally in a propeller cap (1), which is at least partly sealed with a propeller axle formed as a hollow shaft (7). Radial bores or pipes to the heat source are guided from the supply pipe or after a recess from a long central bore (8) in the shaft. The hollow shaft has a larger diameter between the cap and the recess near the motor, so that a coaxial hollow space (12) to the cap is open, to guide warm water to the radial pipe. By rotating the cap, propeller and rotor, the warm water is pushed out through openings in the outermost cap edge, by centrifugal force.