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싱글 립실과 더블 립실의 유막 두께에 관한 수치적 연구
김태환(Taehwan Kim),김한구(Hangoo Kim),심종현(Jonghyun Shim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2007 한국트라이볼로지학회 학술대회 Vol.2007 No.6
The most important thing is the obtainment of stable sealing capacity and durability on the design for lip seal. Thus studies on the oil film thickness and design of oil film should be performed fundamentally and sufficiently. But unfortunately it is very difficult to design oil film through the FEM analysis and experimental method. Because the oil film varies variously due to diversity of circumstances. This paper presents the numerical result of the oil film thickness with various factors.
디스크 브레이크의 트라이볼로지적 특성에 관한 실험적 연구
김청균(Chungkyun Kim),조승현(Seunghyun Cho),한주현(Joohyun Han),강현준(Hyunjoon Kang),김도현(Dohyun Kim),김한구(Hangoo Kim),이일권(Ilkwon Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper surface profile, roughness and hardness were experimented for study of tribological characteristic of automotive disk brake. In this work, 5 specimens were employed for roughness test as a function running distance. Despite the fact that brakes must operate under a variety of environmental conditions, most research has worked in laboratory with ideal condition. This paper investigated the average roughness of disk brakes which are actually operated in automotive. Average roughness decreased with running distance from 0 to about 10,000㎞ due to unevenly contact surfaces between disk brake and pads. But that has been increased with running distance from about 10,000 to 20,000㎞ due to loss of solid lubrication film and higher contact pressure between two rubbing surfaces.
김태환(Taehwan Kim),김한구(Hangoo Kim),김도현(Dohyun Kim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.11
This paper presents the numerical results of the contact force and durability with optimized design of lip seal. Using the finite element method based on the Ogden model, the contact force and durability of lip seals were analyzed to illuminate the effect of various shaft interferences and the shape of lip seals. And the optimized design is performed through the Taguchi method. The results show that No.5 model is the best model. And the interference, angle and displacement(d) is important factors.
립 실의 최적화 설계에 따른 접촉력 및 내구성 비교 해석
김태환(Taehwan Kim),김한구(Hangoo Kim),김도현(Dohyun Kim),김청균(Chungkyun Kim) 한국트라이볼로지학회 2006 한국트라이볼로지학회 학술대회 Vol.2006 No.6
This paper presents the numerical results of the the contact force and dulability with optimized design of lip seal. Using the finite element method based on the Mooney-Rivlin model, the contact force and dulability of lip seals were analyzed to illuminate the effect of various shaft interferences and the shape of lip seals. And the optimized design is performed through the Taguchi method. The results show that No.4 model is best model. And the inteference, angle and round is important factors.
주행거리에 따른 디스크 브레이크의 마찰 마멸 특성 연구
김청균(Chungkyun Kim),조승현(Seunghyun Cho),한주현(Joohyun Han),강현준(Hyunjoon Kang),김도현(Dohyun Kim),김한구(Hangoo Kim),이일권(Ilkwon Lee) 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.38 No.-
In this paper surface profile, roughness and hardness were experimented for study of friction wear characteristic of automotive disk brake considering running distance. In this work, 5 specimens were employed for roughness test as a function running distance. Despite the fact that brakes must operate under a variety of environmental conditions, most research has worked in laboratory with ideal condition. This paper investigated the average roughness of disk brakes which are actually operated in automotive. Average roughness decreased with running distance from 0 to about 10,000㎞ due to unevenly contact surfaces between disk brake and pads. But that has been increased with running distance from about 10,000 to 20,000㎞ due to loss of solid lubrication film and higher contact pressure between two rubbing surfaces.
디젤 엔진에서 밸브 스템계의 표면 조도에 따른 오일 누설 특성에 관한 실험적 연구
이일권(Ilkwon Lee),김시영(Siyoung Kim),국창호(Changho Kook),김청균(Chungkyun Kim),김도현(Dohyun Kim),김승철(Seungchul Kim),김한구(Hangoo Kim),문학훈(Hakhoon Moon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper is for study on the leakage including with surface roughness in the valve stem system of diesel engine. This paper is for study on the oil leakage including with surface roughness in the valve stem system of diesel engine. In the leakage 1, the surface roughness was very dense, but leakage quantity of oil showed growing a trend. In the leakage 1 and 2, when the surface roughness was more scabrous, the control of oil leakage verified that fact is more advantageous. In the leakage 3, the sample verified more favorable for control of oil leakage that the surface roughness of valve stem was not soft. The experimental result of leakage 4 verified that lost a pocket effect that is a role for oil storage existing in the range of surface roughness in leakage 3. As a result, the oil leakage quantity knew increasing a tendency. In the showing from this experimental results, the condition of surface roughness being the most suitable for oil leakage control can conclude with 0.26~0.48㎛.
자동차 스티어링 시스템의 트라이볼로지적 특성에 관한 고장 사례 연구
이일권(Ilkwon Lee),전윤수(Yoonsoo Chun),김청균(Chungkyun Kim),김한구(Hangoo Kim),이병관(Byungkwan Lee),김영규(Younggyu Kim),김도현(Dohyun Kim),강현준(Hyunjoon Kang),한주현(Joohyun Han) 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.11
The purpose of this paper is study and analysis the failure examples for tribological characteristics of automotive steering system. When the revolution of inner tie-rod and ball joint is bad, the steering wheel is difficult for action. Decreasing this condition, the driver must inhibit non-pavement and abnormality road riding. Also, resulting sticking phenomenon identification by oil leaking of oil power steering pump, the driver must keep not only riding condition of normal road but also thoroughly vehicle management according to inspection period. Finally, to decrease failure of system by damaging of power steering belt, the belt have to preserve profit tension.