Research on Fault Mechanism of Pendulum Shear Bearing Based on Stress and Thermal Analysis and Finite Element Simulation Technology

Abstract

After using the bearings (NSK, FAG) of different manufacturers with the same external dimensions for a pendulum reducer bearing for thin steel slab continuous casting and rolling production line of a steelmaking plant, the bearing failure occurs in a short period of time, which seriously affects the safe operation and production efficiency of the equipment. According to the structure of the pendulum shear and its working characteristics, this paper analyzes its load characteristics and conducts on-site measurement of the force parameters of the pendulum shear. And using the classical bearing friction theory such as Hertz law, the contact pressure and the heat rate between the inner ring and the roller of different types of bearings are analytically calculated. Based on field measured force energy parameter data and analytical calculation results, the finite element technique is used to simulate the dynamics of the pendulum shear drive system and the temperature field, and the real reason for the bearing failure is obtained. According to the analysis of the research results, the replacement of the same size bearing (SKF) with better mechanical response performance is a reasonable measure to effectively solve the problem of short-term failure of the bearing.