Abstract: The present invention relates to a steering arrangement for ships with a water jet unit, comprising a steering device that is pivotable about an essentially vertical shaft having a first center line, at least one hydraulic cylinder articulately connected at a first end of the hydraulic cylinder to the attachment flange of the water jet unit, a turning device connected to the shaft for attachment to a second end of the hydraulic cylinder at a distance from the shaft, a reversing device for pivoting the steering device, the reversing device being arranged about an essentially horizontal shaft, an additional hydraulic cylinder arranged to act on the reversing device, the additional hydraulic cylinder following the movement of the steering device, characterized in that all the hydraulic cylinders are arranged within a sheltered space located above the extension of the vertical shaft.

Abstract: The present invention relates to a jet propulsion unit (1) for propulsion of a waterborne craft comprising at least one impeller pump (3) with a pump housing (4) in which an impeller shaft (22) or ajournal (21) connected to said impeller shaft (22) is is rotatably journalled in bearings, and an impeller (7) blades (24), the impeller (7) being fixed to said impeller shaft (22) or journal (21) so as to follow the rotation of the impeller shaft (22), the impeller blades (24) being arranged at the impeller ( ) with a play of the blades (25) between each impeller blade (24) and the inside (15) of the pump housing (4). According to the invention the jet propulsion unit (1) also comprises an axially adjustable thrust bearing (27) arranged to cooperate with the impeller shaft (22) for adjusting said play (25).

Abstract: The invention comprises a propulsion system for ships comprising an impeller (13, 14), a stator shell (1), and a impeller housing (3) for achieving a waterjet, a shaft (11, 12) for the propulsion of the impeller (13), and a bearing arrangement for the shaft (11, 12) in the stator shell (1), and preferably a sealing (15) of the shaft (11, 12) in the impeller housing (3), wherein said bearing arrangement comprises at least one sliding bearing unit (25; 26) intended to carry axial load, and which sliding bearing preferably is water lubricated.

Abstract: A propulsion system for ships having an impeller (13, 14), a stator shell (1), and an impeller housing (3) for achieving a water jet, a shaft (11, 12) for the propulsion of the impeller (13), and a bearing arrangement for the shaft (11, 12) in the stator shell (1), and preferably a sealing (15) of the shaft (11, 12) in the impeller housing (3), wherein the shaft (11, 12) consists of a light weight shaft, which has considerably lower bending rigidity than a homogenous, conventional steel shaft, and the driving force is transmitted via at least one non-flexible coupling (11B, 12A) and via the bearing arrangement which is rigid as to bending and handles the axial load, to the stator shell (1), such that a high power density is achieved.