STERN BEARINGS -- IN SERVICE MEASUREMENTS OF TAILSHAFT ATTITUDE, BEARING CLEARANCE AND OTHER PARAMETERS

Tests carried out on the split stern bearing of a 280,000 tdw VLCC are described and discussed in this paper. The purpose of the tests was to establish the tailshaft attitude within the bearing, the minimum bearing clearance, the axial movement of the shafting, the lubricating oil pressure variation at the outboard oil seal and various stresses in the bearing assembly and associated hull plating. The measurements cover both ballast and full load operation under a variety of main engine speeds and weather conditions and were obtained during normal commercial operation without any special manoeuvres being carried out for test purposes. The main findings of the tests were the unexpected effects of hull deflexions, the likelihood of achieving better shaft alignment by carrying out the alignment procedure at ballast draft and the fact that the tailshaft frequently runs in the oil ways normally cut into stern bearings.

• Corporate Authors:

  Intec Press Limited

  3 Station Parade
  Whyteleafe, Surrey,   England 
• Authors:
  • Crombie, G
• Publication Date: 1976

Media Info

• Features: References;
• Pagination: p. 17-25
• Serial:
  • Tanker and Bulker International
  • Volume: 2
  • Issue Number: 10
  • Publisher: Intec Press Limited

Subject/Index Terms

• TRT Terms: Alignment; Bearing tests; Bearings; Deflection; Excavation; Hulls; Lubrication; Oceans; Oil seals; Propeller shafts; Shaft bearings; Shaft sinking; Shafts (Machinery); Sterns
• Old TRIS Terms: Bearing lubrication; Hull deflections; Marine applications; Shaft alignment; Stern bearings; Tailshaft assemblies; Tailshafts
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00156858
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 2 1977 12:00AM