Dynamic modeling of the dual-impulse behavior produced by a spallon the outer race of a ball bearing considering impact forces
LUO Maolin, GUO Yu, WU Xing
Key Laboratory of Vibration and Noise under Ministry of Education of Yunnan Province, Faculty of Mechanical and Electrical Engineering,
Kunming University of Science and Technology, Kunming 650500, China
Abstract:The dynamic modeling for a bearing is a theoretical foundation for investigating the interrelation of the dual-impulse behavior induced by a spall on the inner or outer race with the size of the spalling area.A certain bearing with a spall on its outer race was chosen to be the studied object and the overall passing process of the rolling elements across the outer race spall area was deeply analyzed.On this basis, the time-varying deflection excitation function produced by the outer race spall was obtained, and then the formula including the ratio of ball diameter to spall length for calculating the impact force of the rolling elements striking the spall edge was developed.As a result, a novel dynamic model of the ball bearing with a localized spall on its outer race was proposed based on the Hertzian contact theory, which considers the time-varying displacement mechanism and the impact force excitation due to the outer race spall.The solution to the dynamic equations was carried out using the Runge-Kutta numerical integration method.The comparison of the simulated results and the experimental results of the hybrid ceramic ball bearing with an outer race spall shows good effectiveness of the proposed dynamic model which incorporates impact forces in predicting the dual-impulse time interval and the characteristic defect frequency.
罗茂林,郭瑜,伍星. 考虑冲击力的球轴承外圈剥落缺陷双冲击现象动力学建模[J]. 振动与冲击, 2019, 38(14): 48-54.
LUO Maolin, GUO Yu, WU Xing. Dynamic modeling of the dual-impulse behavior produced by a spallon the outer race of a ball bearing considering impact forces. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(14): 48-54.
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