Research on load distribution optimization of main bearing of shield machine based on nonlinear spring contact force model
MA Caibing
CHEN Guanci
Abstract：[Objective]The main bearing of the shield machine bears complex concentrated loads(including huge axial force and overturning moment).To improve the finite element simulation efficiency of the slewing bearing and reduce its maximum contact load,a non-planar structure design method for the inner ring raceway of the bearing was proposed.[Methods]Taking the three-row cylindrical roller bearing as the research object,the finite element analysis was carried out by adopting the modeling method of equivalent cylindrical rollers with nonlinear springs.The internal contact load distribution and overall deformation characteristics were obtained under the combined loads of typical working conditions.[Results]The results show that the equivalent modeling method effectively can reduce the calculation scale and shorten the calculation time;the contact loads of the upper and lower rows of rollers present an approximately symmetrical distribution;compared with the maximum contact load of the circular raceway bearing,the maximum contact load of the non-planar raceway bearing is reduced by about 9%,and the roller load distribution is more uniform with all values decreased.Reference value is provided by this study for prolonging the service life of the bearing.
Keywords：Three-row cylindrical roller bearingNonlinear springLoad distributionNon-planar racewayFinite element
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 49-56 )