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Analytical and CFD modeling of the fluid flow in an eccentric-tube centrifugal oil pump for hermetic compressors.

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

Type of article: Article, IJR article

Summary

A model is presented for calculating the volume flow rate in an eccentric-tube centrifugal oil pump for reciprocating compressors. The oil pump assembly consists of a pick-up tube with an inclined inlet that is mounted off-center with the crankshaft symmetry axis. The pick-up tube is connected to the shaft channel, a helical groove machined on the crankshaft that facilitates the supply of lubricant to the bearings. The analytical models for the pick-up tube and shaft channel were developed independently and were coupled via a numerical procedure to determine the steady-state volume flow rate in the assembly. The steady-state results were verified against a CFD model, which was also used to evaluate the fluid flow in the oil pump assembly during a start-up transient. A parametric analysis was conducted to quantify the influence of some oil pump geometric parameters, such as the pick-up tube diameter and the shaft eccentricity.

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Pages: 1905-1915

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Details

  • Original title: Analytical and CFD modeling of the fluid flow in an eccentric-tube centrifugal oil pump for hermetic compressors.
  • Record ID : 30009796
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 7
  • Publication date: 2013/11

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