SEALING DEVICE FOR ROTARY SHAFT OF SHIP'S PROPELLER

摘要

PROBLEM TO BE SOLVED: To provide a sealing device that simply guarantees heat radiation, satisfies required conditions as an opposing sliding surface for a packing ring, and is favorable in terms of costs.SOLUTION: Shaft bushes (2a, 2b) are formed of at least two bushes arranged concentrically with each other and formed of different materials. The outer part (2a) of the shaft bush is formed of an abrasion resistant material while the inner part (2b) of the shaft bush is formed of a high-conductivity material. A wall thickness from the outer part (2a) to the inner part (2b) is set to a dimension of 1:10 to 1:3.