| 摘要 |
The propulsion unit (100) comprises, a casing (20), a shaft (31), a propeller (37), an annular housing (40) and a rim drive electric motor (50). The casing (20) is rotatably supported at a hull (10) of a vessel. The shaft (31) is rotatably supported with bearings (32, 33) within a lower portion (22) of the casing (20). A propeller (37) is attached to an outer end (31A) of the shaft (31) protruding from the lower portion (22) of the casing (20). The annular housing (40) surrounds an outer perimeter of the propeller (37) and forms a duct (45) for water flowing through the interior of the annular housing (40). The rim drive electric motor (50) comprises a rotor rim (51) provided on an outer perimeter of the propeller (37) and a stator (52) provided within the annular housing (40). Standard oil lubricated roller bearings (32, 33) can be used on the shaft (31) within the casing (20). The axial (X) length (L1) of the propulsion unit (100) can be made short and a high torque can be achieved. |
