Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Finite Difference Analysis of Dynamic Characteristics of Negative Pressure Rectangular Porous Gas Bearings

음압 직각 다공질 공기베어링의 동특성에 관한 유한차분 해석

  • Hwang Pyung (School of Mechanical Engineering, Yeungnam University) ;
  • Khan Polina (Department of Mechanical Engineering, Graduate School, Yeungnam University) ;
  • Lee Chun-Moo (Department of Mechanical Engineering, Graduate School, Yeungnam University) ;
  • Kim Eun-Hyo (Department of Mechanical Engineering, Graduate School, Yeungnam University)
  • 황평 (영남대학교 기계공학부) ;
  • 콴폴리냐 (영남대학교 대학원 기계공학과) ;
  • 이춘무 (영남대학교 대학원 기계공학과) ;
  • 김은효 (영남대학교 대학원 기계공학과)
  • Published : 2006.04.01
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Abstract

The numerical analysis of the negative pressure porous gas bearings is presented. The pressure distribution is calculated using the finite difference method. The Reynolds equation and Darcy's equation are solved simultaneously. The air bearing stiffness and damping are evaluated using the perturbation method. Rectangular uniform grid is employed to model the bearing. The vacuum preloading is considered. The pressure in the vacuum pocket is assumed to be a constant negative pressure. The total load, stiffness, damping and flow rate are calculated fur several geometrical configurations and several values of negative pressure. It is found that too large vacuum pocket can result in negative total force.

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References

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