PROGRAM CALCULATION OF EFFECTIVE CONTACT AND BENDING CRITERIONAL STRESSES OF TEETH OF NOVIKOV GEARING

Abstract

The article presents the full version of the NOVGOST computer program for determining the effective contact and bending phase criterional stresses of Novikov gearing teeth with basic profile according to GOST 15023–76, developed in the system MAPLE 17. The program reproduces the process of real multipoint engagement of Novikov gearing, which takes into account the inevitable errors in the manufacture and assembly of a gear pair, dependent on the assigned degree of accuracy, as well as the rigidity of the teeth themselves and the associated parts of the gearbox – shafts and bearings. The program is based on the results of solving a 3D contact problem to determine the phase dependences of the effective contact and bending stresses, as well as rigidity of teeth from the ends of the teeth, when the contact area is positioned anywhere along the length of the tooth, including the end of gear rim, taking into account the influence of the latter on the listed parameters through the coefficients of influence. With the help of the presented program partial forces in real multipoint engagement are determined, acting on each contact area and, In this way, phase criterional stress are calculated, determining the load-bearing capacity and service life of Novikov՚s gearing. The program laid the opportunity to set the parameter of the longitudinal modification of the teeth, optimal selection of which allows significantly reduce the criterional stress and thereby significantly improve working capacity projected gearing. The program can be very useful for designing and manufacturing in production competitive in the global market gearboxes with high technical economic indicators, equipped with Novikov gearing.