The technique of calculating the radial sliding bearings of infinite and finite length running on a double-layer stratified lubricant is presented. The technique is based on the use of the self-simulated variable that allows obtaining the exact self-similar problem solution both in polar and in cylindrical coordinates, as well as the parameter value characterizing the interface of the stratified layers. These tasks are complicated by the simultaneous consideration of the lubricant viscosity-pressure relation, the presence of the friction-adapted sup-porting profile of the bearing bush, and the effect of the axial lubricant feed in the finite-length bearing. As a result, com-putational models are obtained for two-layer stratified lubri-cants the numerical analysis of which allows establishing the impact of variables on the basic bearings performance – components of the bearing capacity vector, friction forces, as well as optimal values of the reference profile parameter, the lubricant supply, and its viscous ratio in the stratified layers
radial bearing, double-layer lubricant, axial lubricant feed, viscosity-pressure relation, bearing capacity, friction force, stream functions, self-similar solution
Введение. Как известно [1–3], при наличии в смазочной жидкости частиц присадок или продуктов износа, а также за счет пристенной адсорбции и ориентации молекул, вблизи опорной поверхности подшипниковой втулки происходит стратификация смазочного материала на слои с различной вязкостью. Слоистое течение вязкой несжимаемой жидкости в зазоре упорного и радиального подшипников рассматривалось в работах [4–9]. Существенный недостаток существующих методик заключается в том, что в расчетной модели не учитывается зависимость вязкости от давления. При больших значениях давления в смазочном слое вязкость смазки существенно возрастает и возникает необходимость учета зависимости вязкости от давления.
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