摘要:
A method for the maintenance of a ship or platform propulsion assembly includes providing a hull insert forming a watertight housing located within a hull of a ship except for an opening. A motor is in the hull external to the housing and a thruster is external to the hull. A telescopic driving shaft sealingly passes through one of the walls of the housing to operatively connect the motor and the thruster to transmit movement to the thruster. Moving the thruster includes retracting the thruster into the housing through the opening. A separable submersible movable hatch is lowered by removable hanging cables. The submersible movable hatch externally engages the housing and sealingly closes the opening to close the housing and form a watertight closed chamber. Fluids within the closed chamber are evacuated even when the hull is floating and partially submersed, with the thruster at least partially in air.
摘要:
A method for the maintenance of a ship or platform propulsion assembly includes providing a hull insert forming a watertight housing located within a hull of a ship except for an opening. A motor is in the hull external to the housing and a thruster is external to the hull. A telescopic driving shaft sealingly passes through one of the walls of the housing to operatively connect the motor and the thruster to transmit movement to the thruster. Moving the thruster includes retracting the thruster into the housing through the opening. A separable submersible movable hatch is lowered by removable hanging cables. The submersible movable hatch externally engages the housing and sealingly closes the opening to close the housing and form a watertight closed chamber. Fluids within the closed chamber are evacuated even when the hull is floating and partially submersed, with the thruster at least partially in air.
摘要:
A propulsion assembly of a ship or floating platform (1) uncommonly capable of a simple construction and reduced overall dimensions, comprises: - a hull insert (2), or trunk, forming a housing (3), or propeller case, located within a hull (4) of a ship or platform; said housing (3) being a housing watertight with respect to the hull in all the walls (5) thereof, except for an opening (6) opening externally to the hull (4) of the ship or platform; - a motor (7); - said motor (7) being arranged in said hull (4), but externally to said housing (3), and being arranged stationary with respect to said hull (4); - a thruster (8), for example, a propeller foot; said thruster (8) being suitable to be arranged externally to said hull (4) to generate a propulsion thrust on said ship or floating platform; - a telescopic driving shaft (9); - said telescopic driving shaft (9) passing sealingly through one of the walls (5) of said housing (3) to operatively connect said motor (7) and said thruster (8) and to transmit the movement from the motor to the thruster for the movement of said thruster (8); said thruster (8) being retractable within said housing (3) passing through said opening (6); - a submersible movable hatch (10) in a separate piece and completely disconnectable from said thruster (8) and said housing (3); - said movable hatch (10) being suitable to associate externally to said housing (3), passing externally to said hull (4), and sealingly close said opening (6) of said housing (3), closing said housing (3) and forming a watertight closed chamber (11) with respect to the outside of said hull (4); - a fluid evacuation device (12) for evacuating fluid (13) that is present within said closed chamber (11) so as to arrange said thruster (8), when retracted in said housing (3) closed by said hatch to form said closed chamber, at least partially in air.