| 摘要 |
The invention relates to a vessel comprising a hull (1) and a cylindrical turret well (3). The vessel can weathervane around a geostationary turret (4) located in the turret well. At least one swivel (7) is supported on the turret. According to the invention, the inner wall (10) of the swivel is connected to rotation drive means (18), which can thereby be reduced in size and which allow the full swivel weight to be transferred directly to the turret. In one embodiment the inner wall (10) of at least one swivel, preferably the walls of a swivel stack, is rotatably connected to a swivel support structure on the turret via a bearing (17). The rotation drive means (18) are adapted for rotating the inner walls (10) in conjuction with the vessel. In this way relative displacements between the swivel (7) and the turret (4) are reduced such that the layout of the pipe lines connected to the swivel can be simplified by the omission of expansion loops. As the weight of the swivel is carried by the turret, the rotation and pipe support structure can be relatively small. In a second embodiment the outer walls of the swivel stack are fixedly connected to the turret. In this way separate rotational drive means for the outer walls can be omitted. <IMAGE> |
