Numerical investigation of subsynchronous vibration in floating ring bearings

作者：Wang, Yan; Ren, Xiao-dong; Li, Xue-song^*; Gu, Chun-wei

来源：Proceedings of the Institution of Mechanical Engineers - Part J: Journal of Engineering Tribology , 2018, 232(11): 1390-1401.

DOI：10.1177/1350650117753915

• Hydrodynamic lubrication
• computational fluid dynamic
• air entrainment
• floating ring bearing

Floating ring bearings are popular among turbochargers due to their simplicity and reliability. The disappearance of subsynchronous vibration with the increase of shaft speed in a low oil-supplied pressure floating ring bearing is reported by Hatakenaka and Yanai. This finding may help eliminate the noise and decrease the loss of turbochargers. This work aims to explain this phenomenon in the low oil-supplied floating ring bearing using computational fluid dynamic. Steady computational fluid dynamic calculation is conducted to validate the effect of air entrainment. Transient computational fluid dynamic calculation method with mesh motion method is established. The subsynchronous vibration of the shaft can be obtained by discrete Fourier transform analysis. The results are validated by comparing them with those in the literature. It is found that the disappearance of the subsynchronous vibration is the result of the change in lubricant properties caused by the air entrainment.

• 出版日期2018-11
• 单位清华大学