Abstract
The interference fit of the front and rear bearings inner rings have a significant effect on dynamic characteristics of spindle rotor system. In order to study the interference amount variation of bearing inner ring under different working conditions, a bearing interference fit model is established considering centrifugal displacement and thermal displacement. The temperature simulation model of spindle is proposed, which can analyze the relationship between temperature and thermal displacement. Newton iteration method is utilized to solve the bearing dynamic model, and the interference effect on dynamic characteristics of the bearing has been explored in detail. The results reveal that the bearing inner ring initial interference will tend to decrease with the increase of speed, and the influence of temperature and centrifugal force are significant. In addition, the reliability of the proposed model is verified by different temperature and vibration experiments. Under high speed condition, the interference amount between bearing and shaft should be appropriately increased. The bearing interference fit research is helpful for the dynamic characteristics analysis of bearing, which can be considered as a guide in spindle rotor system fit mode.
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Acknowledgements
This research was funded by the National Natural Science Foundation of China [Grant Nos.: 52175107 and 52005352], Exchange project of the Fourth China-Ukraine Intergovernmental Meeting [Grant No. 35] and Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University [Grant No.VCAME202008].
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Wang, Z., Wang, Z., Bai, X. et al. Effect of interference fit on dynamic characteristics of spindle rotor system. J Braz. Soc. Mech. Sci. Eng. 44, 316 (2022). https://doi.org/10.1007/s40430-022-03545-4
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DOI: https://doi.org/10.1007/s40430-022-03545-4