Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A study on lubrication characteristics between piston ring and cylinder bore of bent-axis type piston pump for vehicle

차량용 사축식 피스톤 펌프의 피스톤 링과 실린더 보어간의 윤활특성에 관한 연구

  • Jung, Jae-Youn (Division of Mechanical & Aerospace System Engineering and RCIT, Chonbuk National University) ;
  • Cho, Ihn-Sung (Division of Mechanical & Aerospace System Engineering, Chonbuk National University) ;
  • Song, Kyu-Keun (Division of Mechanical & Aerospace System Engineering, Chonbuk National University) ;
  • Baek, Il-Hyun (Department of Precision Mechanical Engineering, Chonbuk National University) ;
  • Oh, Seok-Hyung (Division of Mechanical Engineering, Kunsan National University) ;
  • Jung, Seok-Hoon (Department of Automobile, Byuksung College) ;
  • Jeong, Yong-Wook (TongMyung Mottrol co., ltd.)
  • 정재연 (전북대학교 기계항공시스템공학부, 공업기술연구센터) ;
  • 조인성 (전북대학교 기계항공시스템공학부) ;
  • 송규근 (전북대학교 기계항공시스템공학부) ;
  • 백일현 (전북대학교 정밀기계공학과 대학원) ;
  • 오석형 (군산대학교 기계공학부) ;
  • 정석훈 (벽성대학 자동차과) ;
  • 정용욱 (동명모트롤(주))
  • Published : 2007.10.31
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Abstract

The bent-axis type piston pump which is driven by the piston rod works on the way that the piston rod drives the cylinder block, so the taper angle of the piston rod and the swivel angle between the cylinder block and the shaft are very important design factors. If the above factors cannot satisfy the conditions of optimum design, the friction loss between the cylinder bore and the piston increases, and the pump can even fail to work under conditions of severe friction and wear. Since the piston reciprocates in the cylinder bore with high velocity, and at the same time it rotates on its own axis and revolves on the center of the cylinder block, the decrease of the volume efficiency generated on account of the leakage between the cylinder bore and the piston. Therefore, to prevent this case, the piston ring is designed at the end of the piston, and the friction characteristics between the piston ring and the cylinder bore are in need of research due to its great influence on the performance of piston pump. Thus, in this paper, the elastic hydraulic oil's lubrication analyses of the film thickness, the pressure distribution, and the friction force, and so on, have been performed, and the lubrication characteristics between the piston ring and the cylinder bore are explored by the results of the numerical analysis, and it is contributed to realize the higher efficiency and the more advanced performance of the bent-axis type piston pump.

Keywords

References

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