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| Dynamic load characteristics of rolling bearing under acceleration condition |
| TU Wenbing, LIANG Jie, LUO Ya, ZHOU Jianmin, ZHOU Shengtong |
| School of Mechatronic and Vehicle Engineering, East China Jiao Tong University, Nanchang 330013, China |
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Abstract The dynamic effect of moving parts of rolling bearing plays an important role in load distribution and performance of rolling bearing, especially, under variable speed conditions.Here, taking a deep groove ball bearing as the study object, its dynamic model was established considering clearance, centrifugal force and gravity of rolling element, dynamic effect of rolling element and inner race.The operation process of the rolling bearing under acceleration condition was dynamically simulated to analyze dynamic load distribution characteristics of rolling element and their mechanism under the action of radial loads, and effects of clearance, inner race mass and angular acceleration on dynamic load of rolling element were revealed.The study results showed that under acceleration condition, the load distribution curve of rolling element is no longer symmetric along the load action line and has fluctuates with different degrees, especially, in the late stage of acceleration process; the maximum contact load of rolling element basically keeps unchanged in the early stage of acceleration process, but fluctuates and rises in the later stage, and the unstable motion of inner race in acceleration process causes the change of contact load of rolling element; the change degree of dynamic load in acceleration process increases with increase in radial clearance and inner race mass, and increase in angular acceleration makes the change of dynamic load more severe in the later stage of acceleration process; the study results can provide a theoretical basis for load calculation and design of rolling bearing.
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Received: 29 July 2020
Published: 15 May 2021
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