STERN TUBE SEALING SYSTEM STERN TUBE SEALING DEVICE SHIP AND STERN TUBE SEALING METHOD

摘要

A stern tube sealing system for preventing the leakage of lubricating oil in a stern tube covering a propeller shaft, the stern tube sealing system comprising: a tubular housing into which the propeller shaft is inserted; A second seal ring which is housed in the housing at the forward side of the first seal ring and slidably contacts the outer peripheral surface of the liner and forms a first air chamber between the first seal ring and the first seal ring; An air supply unit for supplying air to the first air chamber at an air pressure equal to or higher than a stern side sea water pressure of the first seal ring and a lubricant circulation unit for circulating the lubricant oil into the stern tube at an oil pressure lower than the seawater pressure System is provided.