| 摘要 |
A rotatable propeller drive ( 1 ) for a boat, where the propeller drive ( 1 ) includes an upper fixing plate ( 4 ) adapted for rotationally fixed attachment to the hull bottom ( 2 ) of the boat. A lower underwater housing ( 6 ) is provided on which at least one propeller ( 10, 10 a, 10 b) is mounted, which underwater housing ( 6 ) is mounted rotatably in the fixing plate ( 4 ) about an essentially vertical axis of rotation ( 8 ). An exhaust duct ( 50 ) is provided with an exhaust exit ( 14 ) located in the underwater housing ( 6 ). The exhaust duct ( 50 ) has an upper duct section ( 54 ) which extends through the fixing plate ( 4 ) and has an outlet opening ( 62 ) located in proximity to an opposite inlet opening ( 60 ) in a lower duct section ( 56 ) which extends through the underwater housing ( 6 ). One of the outlet opening ( 62 ) and inlet opening ( 60 ) overlaps the other at least within a limited first rotation angle range for the propeller drive ( 1 ). A sliding seal arrangement ( 58 ) is adapted for sealing between the upper ( 54 ) and lower ( 56 ) duct sections, where the sliding seal arrangement ( 58 ) includes a sealing element ( 64 ) accommodated in a seat ( 66 ) around one of the outlet opening ( 62 ) and inlet opening ( 60 ). The sealing element ( 64 ) has a contact surface ( 68 ) for sliding contact with an opposite sliding seal surface ( 70 ) around the other of the outlet opening ( 62 ) and inlet opening ( 60 ).
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