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

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Lubrication Effect of Journal Bearing according to its Eccentricity and Attitude Angle

베어링 편심도와 자세각에 따른 저어널 베어링의 윤활효과

  • Kim, Jong-Do (Industry-Academic Cooperation Foundation, Jungwon University) ;
  • Wang, Yi-Jun (Dept. of Mech. Design Eng., Pukyong National University) ;
  • Yoon, Moon-Chul (Dept. of Mech. Design Eng., Pukyong National University)
  • 김종도 (중원대학교 산학협력단) ;
  • 왕일군 (부경대학교 기계설계공학과) ;
  • 윤문철 (부경대학교 기계설계공학과)
  • Received : 2015.06.30
  • Accepted : 2015.09.09
  • Published : 2015.10.31
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Abstract

The thickness of adsorbed molecular layers is the most critical factor in studying thin-film lubrication, and it is the most essential parameter that distinguishes thin-film from thick-film lubrication analysis. The thin film between the shaft and bearing surface within a very narrow gap was considered. The general Reynolds equation has been derived for calculating thin-film lubrication parameters affecting the performance of the circular journal bearing. Investigation of the load-carrying capacity and pressure distribution for the journal bearing considering the adsorbed layer thickness has been carried out. A Reynolds equation appropriate for the journal bearing is used in this paper for the analysis, and it is discussed using the finite difference method of the central difference scheme. The parameters, such as eccentricity and attitude angle, are used for discussing the load-carrying capacity of the journal bearing. The results reported in this paper should be applied to analysis of the journal bearing with different lubrication factors. The steady-state analysis of the journal bearing is conducted using the Reynolds model under thin-film lubrication conditions. For a journal bearing, several parameters, such as a pressure, load capacity, and pressure components of the bearing can be obtained, and these results can be stored in a sequential data file for later analysis. Finally, their distribution can be displayed and analyzed easily by using the MATLAB GUI technique. The load-carrying capability of the journal bearing is observed for the specified operating conditions. This work could be helpful for the understanding and research of the mechanism of thin-film lubrication.

Keywords

References

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