Aft system layout
The aft seal comprises of three major assemblies i.e.
· 3 or 4 rubber seal rings.
· A metal housing or casings which hold the rubber seal rings, and
· A chrome steel liner, which rotates with the propeller and shaft.
The metal housing/casing is made up as a
series of rings, which are identified in order from
the stern frame moving Aft, as
· Casing flange.
· Intermediate ring.
· Support ring.
· Cover.
The three rubber seal rings are fitted between these metal housing/casing rings and bolted together.
The liner is of a high quality chromium steel that is highly resistant to corrosion and wear.
The forward seal comprises of four major assemblies i.e.
· Two rubber seal rings.
· A metal housing or casing which holds the rubber seal rings.
· A liner which rotates with the shaft, and
· A clamp ring, which holds the liner.
The metal housing/casing is made up of a
series of rings, which are identified in order from the
stern tube moving forward, as
· Casing flange.
· Intermediate ring.
· Cover
As with the aft seal, the seal rings are fitted between the casing/housing rings to form an oil tight seal
when the assembly is bolted together.
The liner material provides excellent wear resistance and lip lubricating properties. Alternatively, the liner
may be supplied in chrome steel or even ceramic coated if these options are required.
The split clamp ring, when fitted, clamps to the shaft providing rotation to the liner, which is bolted to it.
Forward system layout
