Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Frictional Loss Analysis of a Reciprocating Compressor with Thrust Ball Bearing

스러스트 볼 베어링이 적용된 왕복동형 압축기의 마찰손실 해석

  • Kim, Tae-Jong (School of Mechanical Engineering, Pusan National University)
  • 김태종 (부산대학교 기계공학부 및 기계기술연구원)
  • Received : 2011.01.10
  • Accepted : 2011.03.03
  • Published : 2011.04.30
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Abstract

In this paper, a study on the frictional losses and dynamic behaviors of a reciprocating compression mechanism used in small refrigeration compressor is performed. In the problem formulation of the compressor dynamics, the viscous frictional force between piston and cylinder wall is considered in order to determine the coupled dynamic behaviors of piston and crankshaft supported on a thrust ball bearing. The solutions of the equations of motion of the reciprocating mechanism along with the time dependent Reynolds equations for the lubricating film between piston and cylinder wall and lubricant films of the journal bearings are obtained simultaneously. The hydrodynamic forces of journal bearings are calculated using finite bearing model and G$\hat{u}$m-bel boundary condition. And, a Newton-Raphson procedure was employed in solving the nonlinear equations of piston and crankshaft with a thrust ball bearing. The results explored the effects of design parameters on the frictional losses and dynamic stability of the compression mechanism.

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References

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