Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Root cause analysis of sticking in hydraulically actuated multi-disc friction clutch for ship propulsion

선박 추진용 유압작동식 다판 마찰클러치 고착현상 고장탐구

  • Jeong, Sang-Hu (Division of Land system Center, Defense Agency for Technology & Quality) ;
  • Kim, Jeong-Ryeol (Department of Marine Systems Engineering, Korea Maritime and Ocean University) ;
  • Shin, Jae-Won (Department of Land system center, Defense Agency for Technology & Quality)
  • Received : 2017.03.23
  • Accepted : 2017.05.26
  • Published : 2017.05.31
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Abstract

This study performs a root cause analysis of the sticking that occurs in the hydraulically actuated wet type multi-disc friction clutch in a ship's diesel engine propulsion system that uses rubber elastic coupling. The fishbone method was used to study the sticking through dismantling investigation of the reduction gear and clutch, investigation of the components, and onboard system tests including nondestructive testing. The friction plate sticking is caused by the slip due to friction heat resulting from the leakage of control oil through cracks in the assembled hollow shaft. The friction plate cooling oil also leaks simultaneously through the crack, and partial sticking occurs due to the hot spots in the friction plates. These are caused by insufficient amount of cooling oil due to oil leakage.

본 연구는 고무 탄성커플링을 적용한 특수선의 디젤엔진 추진체계에서 유압작동식 다판, 습식 마찰클러치의 고착에 대한 원인분석 내용이다. 클러치 고착원인 분석을 위해 피쉬본((fish bone) 방법으로 클러치 및 감속기어 분해조사, 선박 탑재상태에서의 체계 시험 및 부품 조사, 비파괴 시험 등을 통해 수행하였다. 마찰판 고착은 클러치 중공축의 크랙부를 통해 제어오일 누설로 인한 슬립, 마찰열 발생에 의해 발생되었다. 마찰판 냉각 오일 또한 크랙부를 통해 동시에 누설에 기인한 유량부족으로 클러치 마찰판은 국부적인 눌러붙임이 발생하는 핫스팟(hot spot)에 의해 고착되었다.

Keywords

References

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