Arrangement for attaching a rudder to a rudder shaft, a rudder shaft, a rudder shaft and a method for dismantling a rudder shaft from a rudder shaft

摘要

The present invention concerns an apparatus and method for attaching a ship rudder to a rudder shaft. The rudder shaft includes a cylindrical portion and an expanded flange part with a cylindrical portion, followed by a conical portion. The rudder includes a rudder element and a flange element for attachment to the rudder element. The flange element includes an internally cylindrical portion for mating, sliding and sealingly surrounding the cylindrical portion of the rudder shaft and an internally cylindrical portion for sliding, mating arrangement around the cylindrical portion of the flange part of the rudder shaft. The rudder element also includes a conical opening for mating attachment to the conical portion of the conical portion of the rudder shaft. It is provided channels for applying hydraulic pressure between the expanded flange part of the flange element, and means for tightening the flange element to the rudder element. Furthermore the invention comprises a rudder shaft for a ship rudder, a ship rudder with a conical opening, and a method for disassembly of a ship rudder from a rudder shaft.