Functional Retention Performance Analysis of Textured Topography Under Elastohydrodynamic Lubrication Interface
In order to study the functional characteristics of the textured surface in the practical working process under the condition of elastohydrodynamic lubrication(EHL),the contact pair composed of smooth ball and rough plane was con-sidered as the research object,three groups of textured surfaces with different micro-pit area ratio and the same depth-di-ameter ratio were designed.The amplitude reduction curve was established according to the point contact isothermal elastic lubrication theory,and the changes in the functional characteristics of the contact interface caused by the elastic deforma-tion of the textured surface was predicted under different working parameters by the fast Fourier transform.The arithmetic mean of surface height Sa and average empty volume Vvv in the ISO 25178 were used to characterize the change process of functional characteristics,and the friction test of the textured surface was carried out in MMW-1000 friction and wear tes-ting machine,the variation law of functional characteristics of surface topography with load and speed was studied.The re-sults show that with the change of load,speed and other working parameters,elastic deformation occurs at the elastic con-tact interface,the deformation changes 3D topography parameters and functional characteristics of the textured surface,and the change of topography parameters is related to the variation law of friction coefficient under different working conditions.In the study of textured surface under elastohydrodynamic lubrication conditions,the functional retention performance of the microstructure of real contact surface can be better measured by combining with the three-dimensional topography parame-ter system.
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