Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (10): 1431-1439.DOI: 10.12068/j.issn.1005-3026.2023.10.009

• Mechanical Engineering • Previous Articles     Next Articles

Dynamic Modeling and Property Analysis of Ball Bearings with Shaft Current Damage

LI Xiao-peng, QU Xing-chao, LI Bai-tao, SU Jing   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Published:2023-10-27
  • Contact: LI Xiao-peng
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Abstract: Aimed at the wind turbine ball bearings, a shaft current damage model in the form of pits is proposed to investigate the influence of the shaft current pit damage on the bearings’ dynamic characteristics. A damage model with length, width and depth is established based on the half-sine and piecewise excitation functions to describe the different damage degrees of the shaft current. The dynamic model of the bearings with shaft current damage is built to study the influence of the pit size, the pit shape and the external load on the vibration properties of the bearings. The effect of the shaft current damage with different damage degrees on the load distribution of the bearings is investigated by the contact analysis. The correctness of the proposed model is verified by comparing the results from the numerical simulation and the experiment. The results show that the shock excitation and the periodic phenomenon caused by the shaft current pit damage can be accurately described by the proposed model. With the shaft current damage increasing, the vibration response and the contact force of the bearings increase, and the stability becomes worse.

Key words: shaft current; damage model; bearing; load; dynamics

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