Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (3): 382-391.DOI: 10.12068/j.issn.1005-3026.2023.03.011

• Mechanical Engineering • Previous Articles     Next Articles

Stiffness Fluctuation Characteristics of Ball Bearings with Misalignment and Ball Distribution Error

XU Hong-yang1, YANG Yang1, WANG Peng-fei2, MA Hui1,3   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. China North Vehicle Research Institute, Beijing 100072, China; 3. Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Revised:2021-12-29 Accepted:2021-12-29 Published:2023-03-24
  • Contact: MA Hui
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Abstract: Bearing misalignment may result in cage fractures and ball distribution errors. In order to analyze the effects of misalignments and ball distribution errors on the bearing stiffness fluctuation, considering the external loads and misalignments of inner and outer races, a quasi-static model of deep groove ball bearings with ball distribution errors is proposed. Based on the proposed model, the effects of ball distribution errors on the fluctuation characteristics of radial, axial and overturning stiffness of deep groove ball bearings under the condition of misaligned inner and outer races and external loads are further analyzed. The results show that the stiffness of the bearings fluctuates with the period of the ball passing through the outer race, that is, VC (variable compliance) vibration under the condition of the misaligned outer race and external loads. At this time, because of the existence of ball distribution errors, the bearing stiffness significantly fluctuates with the cage rotation period. The misalignments of the inner race rotating with the spindle cause the bearing stiffness to fluctuate by half of the inner race rotation period. The stiffness fluctuation amplitude increases due to the ball distribution errors.

Key words: misalignment; ball distribution error; ball bearing; stiffness; quasi-static model

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