Manufacturing Technology 2019, 19(6):979-983 | DOI: 10.21062/ujep/406.2019/a/1213-2489/MT/19/6/979

Modelling of Roller-raceway Contacts in the Slewing Bearing Taking into Account Asymmetrical Load Transfer Through a Roller

Marek Krynke

Czestochowa University of Technology. ul. J.H. Dabrowskiego 69, 42-201 Czestochowa. Poland

During the operation, a slewing bearing is always subjected to a set of combined loads. It is the source of deformation of ball-raceway contacts, rings, and even supporting structures. In practice, deformation of rings and supporting structures is often neglected for simplification, that is, they are supposed to be ideally stiff. To take elasticity of rings and supporting (fixed) structures into consideration, the finite-element method (FEM) is applied. In slewing bearings, a great number of contact pairs are present on the contact surfaces between the rolling ele-ments and raceways of the bearing. In order to improve the computational efficiency of load distribution of large roller slewing bearing, a computa-tional model using one-dimensional finite elements (nonlinear elements) is presented in this paper. In this model, each roller is simulated by a group of nonlinear elements truss, which has the same load-deformation perfor-mance with solid roller-raceway contacts. The results show that a group of parallel springs can be used to replace the solid roller and simulate the line contact performance between the roller and raceway. Obtained results are presented as graphs.

Keywords: Slewing bearing, Load distribution, Contact zone, FEM

Published: December 1, 2019  Show citation