The Conceptual Model for Increasing Wear Resistance and Lubrication Efficiency for Non-conformal and Conformal Friction Units from the Standpoint of Micro-EHD Theory

Abstract

A conceptual model for improving wear resistance and lubrication efficiency for non-conformal and conformal friction units operating under extreme operating conditions with insufficient lubrication, which causes micro-EHD breaks in the lubricating layer during the transition to different modes from fluid to boundary friction, taking into account the multifactorial nature of the task of assessing contact-mechanical rheological and physicochemical aspects according to the criterion evaluation for the realization of stable micro-EHD lubrication according to the criterion of lubrication mode, selection of the optimal microgeometry for the contact-mechanical properties of the stress-strain state of friction surfaces in the actual plane according to the criterion of microgeometry; increasing the share of hydrodynamic pressure of lubricating layers relative to the contact pressure on the protrusions of micro irregularities by the pressure criterion; taking into account rheological parameters for changing the piezoelectric viscosity coefficient with increasing pressure by the rheological criterion; assessing the appearance of a plastic-strain state by the plasticity criterion; modifying and adjusting the qualitative and quantitative chemical composition of components in the lubricating medium to reduce the average local temperature of friction surfaces by the temperature criterion.