25. State about intermediate shaft & bearing?

a. Intermediate shaft

-Intermediate shaft connects thrust shaft and tail shaft.

-Depending on arrangement of engine room, may have one, many intermediate shafts or not.

+If engine room is arranged in middle of the ship, the shaft line may have two or more intermediate shaft, but almost ship engine room is placed at the aft of the ship and there is only one intermediate shaft.

-Steel is material to make the intermediate shaft.

- Normally, each intermediate shaft has one bearing. Figure 2.12 illustrates structure of the intermediate bearing. Oil is used to lubricate for the bearing. White metal is material to make the bearing. When operating, attention must be paid to the bearing such as oil temperature, oil level, oil quality, and condition of sealing ring.

-In some ship, may be use muff coupling (refer Marine auxiliary machinery 7th edition book).

b. Intermediate bearing

-Normally, each intermediate shaft has one or two bearing.

-Oil is used to lubricate for the bearing. White metal is material to make the bearing surface.

When operating, attention must be paid to the bearing such as oil temperature, oil level, oil quality, and condition of sealing ring.