Optimization of the support structure of large axial-radial bearing of overhead type manipulator

Large axial-radial bearings are widely used as means of attachment of slewing mechanisms of cranes and heavy machinery. In case of an inadequate support structure these loadings can hinder proper functioning of the slewing bearing or even lead to its terminal failure. In the paper support of a large-radial bearing mounted on an overhead type manipulator was optimized with the goal of minimization of the peaks of the reaction forces acting between the bearing ring and the bearing support and of increase of the uniformity of the reaction forces. A finite element model of the overhead travelling manipulator was established and the support structure reinforcement configuration was successively optimized. In the final solution maximum tensile and compressive reaction forces were reduced by 13 % in comparison to the initial solution. Also the uniformity of tensile and compressive maximal reaction forces was improved by 74 % and 70 %, respectively.