Опір коченню платформи по котках

Abstract

UK: Розглянуто питання опору коченню. На відміну від традиційного підходу до розрахунків опору коченню, в одержаних залежностях уведено механічні характеристики контактувальних тіл. Це дозволяє підбирати раціональні як геометричні параметри котків, так і механічні характеристики контактувальних поверхонь під час розрахунків опору кочення.

EN: Problem statement.Scientists has long given considerable attention to the resistance with the movements of bodies onthe rolls. The results of their research have already become classics, but this topic is still relevant. Analyzing of the resent research.Coulomb formulated theclassic law of friction bearings. But the physics of the process of rolling resistance was, though not fully disclosed by Hertz in the work «About the contact of elastic bodies». Tabor tried to combine the ideas of Coulomb's theory with the contact deformation of Hertz. Based on their research Tabor proposed dependences of determinations of the coefficients of rolling friction. But these formulas were unsuitable for the calculation of rolling resistance. Research objective. To determine the rolling resistance of platform for boilers depending on the form rollers and mechanical characteristics of the contacting bodies with using friction coefficients of rolling. Conclusions. Design scheme: the platform on which the load that rests on rollers cylindrical shape or rollers like balls, which roll on a horizontal surface. For the movement of the platform with the load it is necessary to put power which is the power of resistance. We got the dependences of the rolling resistance of the rollers' forms and also the geometrical and mechanical characteristics of bodies. We found that the rolling resistance of the corners –balls with the same mechanical and geometrical characteristics on several times greater than the rollers –cylinders. It should be appreciated that increasing the diameters of rollers leads not only to a reduction in the rolling resistance, but also to non–used durabilities of materials. Dependences allow to obtain the rational geometrical parameters of the rollers or rational rolling resistance.