| 摘要 |
The invention relates to a ship's propulsion and/or azimuth steering arrangement surrounded by water, said unit comprising an electric motor (5) in a chamber (4) formed by the unit walls, a propeller shaft (7) associated with the electric motor having a propeller (8) fitted outside the chamber (4). Arrangement includes means (12, 17) for pressurizing the chamber with air or some other pressurizing medium, the thermal conductivity of which increases with the pressurization. The invention also relates to a method for managing fluid flows in the propulsion and/or steering unit of the aforementioned kind, wherein the chamber (4) is sealed (10, 16, 26) on the one hand against the water pressure from outside and on the other hand, correspondingly, against other compartments (11, 15) of the ship. The chamber (4) is pressurized by means of a flowing medium, and monitoring of the pressure in the chamber (4) is performed, and the composition of the medium escaping from the chamber (4) in a controlled manner is monitored (20). Further, the invention comprises a method for improving the cooling by means of a pressurized gaseous medium.
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