Mikosyanchyk O. The assessment of tribotechnical parametes of lubricant in bordered oil condition of the local contact.

The dissertation is dedicated to the rise of machinery’s reliability and long-life by improving tribotechnical characteristics of the friction knot, what is based on the selection of oil’s fractional structure, polyfunctional dopands and additions and establishing of qualitative and quantitative kinetics' regularities of a forming and adaptation of the bordered spheres on the activated surface of the metal and also based on reological, antifrictional and anti-worn figures of lubricants. In the work there are determined loaded, kinematical and temperature conditions (stationary and unstationary regimes) in which oils of different fractional structure acquire properties of non-Newton liquids during their contact. And reological characteristics are the main criterion of the lubricant efficacy and the efficacy of anti-frictional and anti-worn properties. It is established the influence of concentration of the organic substances and unorganic substances on the mechanism of forming and nature of the adsorbed spheres. The mathematical model is offered in this work and gives an opportunity to predict the reliability of tribomechanical system on the principle of regression equation, which determines the dynamic of wear of the friction surface and the kinetics of the forming of boarding spheres that depends on the exploitational and constructional factors. Key words: tribotechnical parameters; reological antifrictional and anti-worn properties; non-Newton liquid; mikrosolidity; mathematical model.