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Analysis of oil pumping in a reciprocating compressor.

Author(s) : LÜCKMANN A. J., ALVES M. V. C., BARBOSA J. R. Jr

Summary

The immediate provision of lubricant oil to the radial and thrust bearings and to the piston-cylinder gap in reciprocating refrigeration compressors is a crucial reliability issue following compressor start-up. The aim of this paper is to present a hydrodynamic analysis of the lubricant oil pumping system of a reciprocating compressor using computational fluid dynamics. In this system, oil is pumped from the sump through a reed-type centrifugal pump located at the bottom end of the shaft. The oil flows initially as a climbing film on the internal surface of the shaft before it is directed to the external surface where it flows along a helix channel carved on the shaft wall. The model was implemented on the commercial package fluent using the volume of fluid method to resolve the free-surface oil flow. Parameters regarding the oil behavior during start-up, such as the time required to reach steady-state operation and the associated oil mass flow rate are explored in the manuscript.

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Details

  • Original title: Analysis of oil pumping in a reciprocating compressor.
  • Record ID : 2008-2458
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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