%0 Journal Article
%T Partial EHL friction coefficient model to predict power losses in cylindrical gears
%A Aitor Arana
%A Ibai Ulacia
%A Jon Larra£¿aga
%J Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
%@ 2041-305X
%D 2019
%R 10.1177/1350650118778655
%X The accurate prediction of friction coefficient and power losses in the gear mesh is a key subject to several gear-related fields of study. However, there is still not a unified method for large ranges of operating conditions, different gear geometries and lubricant types. The current paper meets this demand by modelling partial EHL friction with an asperity-fluid load sharing approach where fluid traction is calculated with the Ree-Eyring equation and the reference stress behaviour is predicted from piezoviscosity coefficient. It will be shown that only an accurate description of the lubricant¡¯s viscosity behaviour is required to compute friction in gears. Finally, mesh power losses are predicted considering thermal effects and numerical predictions are compared to experimental results showing good agreement
%K Cylindrical gears
%K friction coefficient
%K power losses
%K partial EHL
%U https://journals.sagepub.com/doi/full/10.1177/1350650118778655