A system for attaching a ship rudder shaft and a method for disassembly of a ship rudder from a rudder shaft

摘要

The present invention concerns an apparatus and method for attaching a ship rudder to a rudder shaft (1). The rudder shaft (1) includes a cylindrical portion (2) and an expanded flange part (3) with a cylindrical portion (4), followed by a conical portion (5). The rudder includes a rudder element (6) and a flange element (8) for attachment to the rudder element (6). Flange element (8) includes an internally cylindrical portion (9) for mating, sliding and sealingly surrounding the cylindrical portion (2) of the rudder shaft (1) and an internally cylindrical portion (7) for sliding, mating arrangement around the cylindrical portion (4) of the flange part (3) of the rudder shaft. The rudder element (6) also includes a conical opening (21) for mating attachment to the conical portion of the conical portion (5) of the rudder shaft (1). It is provided channels for applying hydraulic pressure between the expanded flange part (3) of the flange element, and means (10) for tightening the flange element (8) to the rudder element (6). Furthermore the invention comprises a rudder shaft (1) for a ship rudder, a ship rudder with a conical opening, and a method for disassembly of a ship rudder from a rudder shaft (1).