Моделирование процесса износа эволютного профиля зуба звездочки цепной втулочно-роликовой передачи

Abstract

When using chain drives in dusty conditions, and for sprockets of the drive wheels for tracked vehicles, to the forefront the problem of accelerated abrasive wear of working teeth profiles. It is proposed to solve this problem using evolute chain mesh, which can ensure the reduction of sliding velocities and contact pressure. A method for the synthesis of tooth form by constructing Bobillier. The solution of the differential equation that describes the profile stars, obtained numerically by the Runge-Kutta method in the system MathCAD using the built-in function Rkadapt. Approximation of the profile with the help of a third-order Bezier curve was made. The methods are developed: determining sliding velocities in the chain engagement; calculating the curvature radius of the tooth profile based on differentiating the Bezier curve; determination of contact stress by H. Hertz formula. Mathematical model of the sprocket tooth wear is developed. Method of evaluation the resource chain drive on the criterion of wear resistance of the tooth profile is proposed.