Optimization design of structural parameters of single-row four-point contact ball slewing bearing

The single-row four-point contact ball slewing bearing has a large structure and is subjected to heavy load, which requires extremely high carrying capacity. The structural parameters of the ball diameter and the number of balls are optimized with the fixed size of the inner and outer rings of the slewing bearing. Numerical methods based on static bearing capacity and fatigue life are used to optimize the structural parameters of the slewing bearing. The finite element model and the local finite element model of the slewing bearing are established to analyze the carrying capacity of different structural parameters. The Hertz contact theory and the experiment are used to compare the theoretically calculated load distribution, contact stress, contact area and deformation. Optimization of structural parameters of the slewing bearing is beneficial to improve the carrying capacity and service life, which provides an important reference for designers.

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