Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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The Causes of Bolt Breakage During the Tightening of Impellers in Water Jet Propulsion Systems

워터제트 추진기 임펠러 체결용 볼트파손 원인 분석 연구

  • Jung, Sang-Jin (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Oh, Shini Il (Zeus Institute Development Division 1) ;
  • Hur, Jang-Wook (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
  • 정상진 (금오공과대학교 기계시스템공학과) ;
  • 오신일 (주식회사 제우스 연구소 개발 1부) ;
  • 허장욱 (금오공과대학교 기계시스템공학과)
  • Received : 2019.06.03
  • Accepted : 2019.07.04
  • Published : 2019.10.30
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Abstract

A water jet propeller is a key component that generates propulsion during the start of a naval vessel. When failure or breakage occurs, the vessel cannot operate. Recently, a flow analysis and structural analysis were conducted to understand the cause of damage to a bolt on a water jet. In particular, the stress and strain acting on the fastening bolt (impeller shaft and tail shaft) were examined to determine the extent of misalignment between the impeller shaft and the tail shaft of the water jet propeller. The study determined that stress and strain were concentrated on the impeller shaft and the tail shaft bolt. The alignment of the propeller impeller shaft and the tail shaft increased significantly in response to the tail shaft bolt. Failure of the tail shaft bolt fastening can lead to misalignment between the impeller shaft and the tail shaft.

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References

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