Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study on Clearance Behaviors with Micro Scaled Lubricant Aeration under the Dynamically-Loaded Condition

동하중 조건에서 마이크로 크기의 공기 혼입 윤활유의 틈새 거동 연구

  • Jang, Si-Youl (School of Mechanical and Automotive engineering, Kookmin University)
  • 장시열 (국민대학교 기계자동차공학부)
  • Published : 2006.02.01
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Abstract

This work analyzes the behaviors of aerated lubricant in the gap between con-rod bearing and journal. Aerated lubricant influences two major factors on the film formation. One is the density characteristics of the lubricant due to the volume change by the bubbles and the other is the viscosity characteristics of the lubricant due to the surface tension of the bubble. Those two major factors surprisingly increase the load capacity in certain ranges of bubble sizes and densities. Modified Reynolds' equation is developed with the consideration of aerated ratio in the lubricant and journal locus is computed with the Mobility method after the computation of two dimensional pressure distributions over the bearing area.

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References

  1. Nikolajsen, J. L., 'The effect of Aerated Oil on the Load Capacity of a Plain Journal Bearings,' STLE, Tribology Transactions, vol. 42, no. 1, pp. 58-62, 1999 https://doi.org/10.1080/10402009908982190
  2. Nikolajsen, J. L., 'Viscosity and Density Models for Aerated Oil in Fluid-Film Bearings,' Tribology Transactions, Vol. 42, pp. 186-191, 1999 https://doi.org/10.1080/10402009908982207
  3. Booker, J. F., 'Dynamically Loaded Journal Bearing : Mobility Method of Solution,' ASME Journal of Basic Engineering, pp. 537-546, Sept. 1965
  4. Streeter, V. L., Fluid Mechanics, McGraw-Hill, New York, 1958
  5. Hamrock, B. J., Fundamentals of Fluid Film Lubrication, McGraw-Hili, Inc., 1994
  6. Jang, S. and Park, Y., 'Study on the Effects of Aerated Lubricant on the Journal Traces in the Engine Bearing Clearance,' International Journal of Automotive Technology, Vol. 6, No.4, pp.421-427, 2005