Systematic investigations on the influence of viscosity index improvers on EHL film thickness

B. R. Höhn, K. Michaelis, F. Kopatsch

Research output: Contribution to specialist publicationArticle

3 Scopus citations

Abstract

The lubricant film thicknesses of a number of polymer-containing oils and their base oils were measured systematically in a twin-disk test rig. In addition, the base oil viscosity and the concentration of the polymers in the base oil were varied. All polymer-containing oils formed lower film thicknesses than a straight mineral oil of the same kinematic viscosity over a wide range of operating conditions. As a result, short-chain polymers in high concentration in the base oil turned out to be significantly more effective in the contact than long-chain polymers in low concentration with the same viscosities.

Original languageEnglish
Pages30-39
Number of pages10
Volume18
No6
Specialist publicationGear Technology
StatePublished - Nov 2001

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