Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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A Study on the Improvement of Wear Resistance of Roller Tappet Assembly using Finite Element Analysis

  • Hun-Kee Lee (Dept. of Mechanical System Engineering, Republic of Korea Naval Academy) ;
  • Hui-Sun Ahn (Technology Solution Center, STX engine Co. Ltd) ;
  • Myeong-Chul Park (Dept. of Avionics Engineering, Kyungwoon University)
  • Received : 2024.10.29
  • Accepted : 2024.11.21
  • Published : 2024.11.29
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Abstract

This study is on the improvement of wear resistance of roller tappet assembly which is applied to V-956 engine. Although the TBO(Time Between Overhauls) of the engine and roller tappet assembly is more than 9,000 engine operating hours, about 60% engines which were operated within TBO suffered severe wear on roller tappet assembly and failed to operated normally. To find out the cause of wear of these roller tappet assembly, finite element analysis was performed using ABAQUS based on the investigation into roller tapper assembly and the operating conditions of V-956 engine. As a result, it was found that wear occurred due to the low hardness value of the roller surface under certain operating conditions, and based on the analysis results, we proposed the optimal hardness value for improving wear resistance on the surface of the roller tappet assembly. The results of this study were applied to the mass production of the corresponding roller tappet assembly and are currently in use.

본 연구는 해군 함정에 사용되는 V-956 엔진에 적용된 롤러 타펫 조립체의 내마모성 개선에 대한 연구이다. 해당 엔진 및 롤러 타펫 조립체의 창정비 주기는 엔진 가동시간으로 9천 시간 이상으로 규정되어 있음에도 불구하고, 창정비 주기 내 다수(약 60%)의 엔진에서 롤러 타펫 조립체의 극심한 마모 및 이로 인한 엔진 정상 작동 곤란 현상이 발생되었다. 이러한 롤러 타펫 조립체의 마모 원인을 규명하기 위하여 롤러 타펫 조립체 및 V-956 엔진의 운용 환경에 대한 분석을 바탕으로 ABAQUS를 활용하여 유한요소해석을 수행하였다. 유한요소해석 결과 특정한 운용 조건에서 롤러 표면의 낮은 경도값으로 인하여 마모가 발생함을 밝혀내었으며, 해석 결과에 기반하여 롤러 타펫 조립체 표면의 내마모성 개선을 위한 최적의 경도값을 제안하였다. 본 연구 결과는 해당 롤러 타펫 조립체의 국산화 개발로 이어져 양산에 적용 중에 있다.

Keywords

Acknowledgement

This study was conducted with support of the research fund from the academic research project of the Republic of Korea Naval Academy's Ocean Research Institute in 2024.

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