AXIALLY ADJUSTABLE THRUST BEARING FOR JET PROPULSION UNITS

摘要

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 housi ng (4) in which an impeller shaft (22) or ajournal (21) connected to said impeller shaft (22) is rotatably journalled in bearings, and an impeller (7) blades (24), the impetter (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 wi th the impeller shaft (22) for adjusting said play (25).