Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Numerical Analysis of Misaligned Finite Line Contacts EHL Problem

Misalignment가 있는 유한한 선접촉 EHL 문제의 수치해석

  • Park, Tae-Jo (School of Mechanical & Aerospace Engineering, ERI, Gyeongsang National University)
  • 박태조 (경상대학교 기계항공공학부.공학연구원)
  • Received : 2010.07.25
  • Accepted : 2010.08.15
  • Published : 2010.10.31
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Abstract

The rollers of cylindrical roller bearing are axially profiled to relieve high edge stress concentration caused by mainly their finite length and by misalignment. In this paper, a numerical analysis is carried to study the EHL of misaligned (tilted) rollers with axially profiled ends. Using a finite difference method with non-uniform grids and the Newton-Raphson method, the highly nonlinear EHL problems are systematically solved. Physically consistent solutions are obtained for moderate load, material parameters and very small misalignment. For different misalignment angles, contours and sectional plots of pressure and film shape near both edge regions are compared. The asymmetric pressure distributions and film shapes show that the EHL results of finite line contacts are highly dependent upon very small amounts of roller misalignment. Especially, the effect of misalignment on the EHL pressure distribution is much higher than the film shapes.

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References

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