A sealing arrangement for a vessel a propulsion unit a vessel and a method for sealing a propeller shaft of a vessel

摘要

The sealing device of the present invention comprises a propeller shaft 31 rotatably supported by at least one bearing 41, a water seal 100 disposed on the propeller shaft 31, an axial direction XX from the water seal, A first oil seal 200 disposed on the propeller shaft adjacent to the bearing at a distance A2 spaced from the first oil seal 200, an intermediate compartment 300 extending between the water seal and the first oil seal and filled with gas, A first pressure sensor (91) for measuring the pressure of seawater acting on the shaft, a second pressure sensor (92) for measuring the pressure of the gas in the intermediate compartment, and a second pressure sensor Pressure system 500, wherein the pressure of the gas in the intermediate compartment is maintained at a lower level compared to the pressure of seawater acting on the propeller shaft.