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Effective Viscosity of Polymer Thickened Oils in Gear Lubrication-Part II
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English
Abstract
Based on IAE gear OK load tests and Shell four ball wear tests of oils thickened with several polymers, it was concluded that the effective viscosity* in such concentrated contacts is governed by the partial permanent viscosity loss in the limited area of the contact. The fact that sheared oils, which were designed to have a finished permanent viscosity loss as would occur in such concentrated contacts, showed similar OK loads and wear scar diameters also proved the validity of the above mechanism as proposed in the previous paper(1)**.
Citation
Hoshino, M. and Nakayama, T., "Effective Viscosity of Polymer Thickened Oils in Gear Lubrication-Part II," SAE Technical Paper 852114, 1985, https://doi.org/10.4271/852114.Also In
References
- Hoshino M. Nakayama T. “Effective Viscosity of Polymer Thickened Oils in Gear Lubrication.” SAE Paper 811205
- Taki T. “Effects of Lubricating Oil on Pitting Durability of Gear.” Journal of JSLE 28 8 1983 603
- du Parquet J.P.R. “Time Dependence of Polymer Oils Shear Thinning, Theoretical and Practical Consequences” SAE Paper 770437
- Walker D.L. Sanborn D.M. Winer W.O. “Molecular Degradation of Lubricants in Sliding Elastohydrodynamic Contacts” Trans. ASME, J. Lub. Tech. 97F 3 1975 390
- The Research Committee on Lubricated Wear of JSLE “Results of Cooperative Study on Common Test Oils. (1)-(4)” Journal of JSLE 27 10 1982 739 27 12 1982 894 28 1 1983 33 28 6 1983 437