Operational limit conditions of the spur gears in lubricated modes

9th International Conference on Tribology

Benilha, S.^1 ; Belarifi, F.^1,2

Institut de Maintenance et Sécurité Industrielle, Université d'Oran, 2. B.P 170, El M'Naouer Oran, Algeria^1

Laboratoire des Sciences de la Matiere Condensé (Equipe de Tribologie et Nano Tribologie), Université d'Oran1, B.P 1524, El M'Naouer Oran, Algeria^2

关键词: International standards;    limit condition;    Mixed lubrication;    Operating condition;    Operation conditions;    Operational limits;    Stribeck curve;    Tribological parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/295/1/012017/pdf
DOI  :  10.1088/1757-899X/295/1/012017

来源: IOP

【 摘 要 】

The calculation of the gear teeth resistance, shows the using of a certain number of coefficients determined experimentally and which are accepted by the various international standards. However, this kind of calculation determines the gears by excess material and does not support the tribological parameters of operation. We propose in this work the support of these parameters, to determine the limit operation conditions of the spur gears, using the equivalent geometry. This is represented by two cylinders, which geometrically models of the contact between two teeth of a gear and whose lubrication is generally in mixed lubrication mode. The concept of Mc cool is used to determine the distribution of the load and the friction force, which are distributed in liquid (elastohydrodynamic) and solid domains and interact with each other. The phenomenon of interaction between the two domains is used, to predict the tribological limit conditions of operation. The proposed model is based on the resolution of elastohydrodynamic equations for the determination of load and friction as well as the deduction of mixed friction by tracing the Stribeck curve. This is calculated by the model of the decomposition of the patterns profile of rough surfaces in contacts. The results of non-dimensional calculations allow us to deduce the boundary conditions and can be adapted for any type of gear pair defined according to pre-established operating conditions.