Abstract
Three-row roller slewing bearings are the core components of large-scale rotating equipment. It has a large structural size and is subjected to heavy loads, which requires extremely high carrying capacity. The effect of finite element mesh size on the carrying capacity accuracy of three-row roller slewing bearing is investigated. A local finite element model is established to analyze the contact area between the roller and the raceway, which is compared with the Hertz contact theory to verify the reasonable mesh size of the finite element model. The local spring finite element model is established, and the effect of the mesh size on the offset and the declination of the upper and lower raceway is investigated; The overall finite element model of the slewing bearing is established to analyze the effect of the mesh size and the nonlinear spring stiffness on the carrying capacity accuracy. The whole circle deformation of the ring and the load distribution is investigated to determine the reasonable mesh size. This article provides a method and idea for the verification of the three-row roller slewing bearing finite element model, which is beneficial to improve the calculation accuracy of the bearing capacity of the three-row roller slewing bearing.
Highlights
The local and overall finite element models of three-row roller slewing bearing are established to study the effect of finite element mesh sizes on the carrying capacity accuracy in this paper
The carrying capacity accuracy of the raceway is evaluated by comparing the average contact stress of different contact lengths between the roller and the raceway with the Hertz contact theory in this paper, which avoids the impact of the chamfer of the roller on the calculation results
The local and overall finite element models of a three-row roller slewing bearings are established in this paper
Summary
It is a large-sized structure (a maximum diameter of 40 m) and subjected to a combination of large axial, radial and overturning moment loads. The finite element model needs to be verified, and the mesh size of the finite element model is of great significance for the calculation of the carrying capacity accuracy of the three-row roller slewing bearing. The local and overall finite element models of three-row roller slewing bearing are established to study the effect of finite element mesh sizes on the carrying capacity accuracy in this paper. The method to improve the calculation accuracy and efficiency of the carrying capacity of the slewing bearing is studied, which is of great significance to the design of the slewing bearing and the practical application of the engineering
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