SHAFTING SYSTEM : Stern Tube Seal (recovery chamber)

Recovery chamber

Recovery chamber is a simple-structure recovery system perfectly shuts off oil leakage out of the ship that might develop into a violation of MARPOL Annex I. The pressure on the recovery chamber is set under the seawater pressure and stern tube oil pressure in order to maintain sealing effect. The aft seal recovery chamber is connected to engine through a recovery piping. Under certain conditions, seawater or lube oil in the stern tube will penetrate the sealing rings and enters the recovery chamber. It is then will be recovered into the engine room through the recovery piping.

Source: Kobelcomarine

SHAFTING SYSTEM : Stern Tube Casting pictures

Stern Tube Casting


Aft and Fwd casting

             


 Stern frame

SHAFTING SYSTEM : Stern Tube Seal

A device that creates a nonleaking union between two elements.

TYPE: OIL LUBRICATING STERN TUBE SEAL

AFT SEAL

• A Sealing between Seawater & Stern Tube L.O
  

FWD SEAL

• A Sealing between Stern Tube L.O & Engine Room

Sealing effect;

• Through the force of pressed sealing ring lip on rotating chrome liner.
  

• Through the sea water pressure & lube oil pressure
  

• Through the tightening force of spring & sealing ring elasticity

Source:kobelcomarine

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