Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on the Stern Bearing Damage and Shaft Alignment for 37K DWT Product/Chemical Tanker

37K DWT 석유화학제품 운반선의 선미관 베어링 발열 사고 및 축계정렬에 대한 연구

  • 박금성 (현대글로벌서비스 마린서비스부) ;
  • 고창익 (모베나코리아) ;
  • 정재욱 (현대글로벌서비스 마린서비스부) ;
  • 남군식 (파나시아 스마트서비스본부) ;
  • 채준식 (파나시아 스마트서비스본부)
  • Received : 2020.09.06
  • Accepted : 2021.01.13
  • Published : 2021.04.20
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Abstract

Together with the emerging of the Eco-ship, the application of large-diameter and high-efficiency propeller required more careful attention than before in the design of the shafting system. After the adoption of Environmentally Acceptable Lubricants (EAL) to the stern tube lubrication oil, a number of aft stern tube bearing accidents have been reported, and a variety of institutions have actively conducted research on the cause relationship. This study attempted to find the cause of the accident by measuring the alignment of the shafting system of a medium-sized product/chemical tanker with aft stern tube bearing damage and analyzing the reaction force of each bearing. In addition, a reasonable solution to the correction of the shaft alignment was suggested and the feasibility was reviewed. Through various measured data and analysis, the actual installation of shafting system was slightly different from the design drawing condition, but it was found that each bearing load distribution was within the allowable range. Therefore, it was confirmed that the cause of this accident was due to the dissatisfaction the misalignment slope of aft stern tube bearing rather than the effect of the bearing overload. As a solution to this cause, countermeasures such as double slope were suggested in the aft stern tube bearing, and the characteristics of EAL also seem to have an indirect effect.

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References

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