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The effect of phosphate additives on the lubrication of rolling element bearings in a refrigerant environment.

Author(s) : RUOMAS R., ISAKSSON O.

Type of article: Article, IJR article

Summary

Chlorine free replacement refrigerants, HFC (hydrofluorocarbons) and HC (hydrocarbons), have shown less lubricating properties. Phosphate based additives were used to improve the lubricity with refrigerant R134a, demonstrating positive effects. In the paper, the ability to form lubricating film and wear of two additives, phosphate ester and acid phosphate, was investigated in a bearing test apparatus. The results show that phosphate additive in polyolester oil, in an R134a environment, increases the lubricating film and reduce wear. Surface topography during the initial run-in changes to a more favourable profile with lower root-mean square angle and longer wavelengths that promote load-carrying capacity and film build-up.

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Pages: 28-36

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Details

  • Original title: The effect of phosphate additives on the lubrication of rolling element bearings in a refrigerant environment.
  • Record ID : 2006-2875
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 1
  • Publication date: 2007/01

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