Analysis of Heating Performances for Ultra-High Speed Electric Spindle Bearings Based on the Energy Theory of TEHL in Point Contact State

Abstract:

To analyze the lubricating state and the heating performances of the spindle bearings in ultra-high speed electric spindles, taken the characteristics of oil-air lubrication into account and based on the theories about rolling bearing dynamics and thermal elasto-hydrodynamic lubrication in point contact state, a model was built with the energy method for analyzing the heating performances the ball elements on both raceways in spindle bearings. An equation was derived for calculating the total quality of heat produced in a bearing. The influences of some basic factors such as the running speed, the axial preload, the oil viscidity, the design contact angle of bearing, and the ball materials and so on are analyzed on the heating performances in a bearing. The results show that it is easy to come into being elasto-hydrodynamic lubrication state for a bearing running in an ultra high-speed and lubricated by oil-air. It is also shown that the higher speed is, the more the quality of heat produced inside the oil films in the elasto-hydrodynamic lubrication state will be, which will bring the bearings working conditions worse.

• Periodical: Applied Mechanics and Materials (Volumes 37-38)
• Pages: 135-140
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.37-38.135
• Online since: November 2010
• Authors: Song Sheng Li, Zhi Hong Hu, Peng Zhou, Peng Chen, Xiao Yang Chen, Jia Ming Gu, Li Xia Fu
• Keywords: Energy Theory, Heating Performance, Spindle-Bearings, TEHL, Ultra-High Speed

References

[1] S.S. Li, G. Zhang, X.Y. Chen and L.X. Yang: Lubrication Engineering, Vol. 5 (2004), pp.162-165 (in Chinese).

[2] D.P. Yan, W.Y. Hou and K. Zhang: Mechanical Engineer, Vol. 12 (2005), pp.110-111 (in Chinese).

[3] K. Ramesh and S.H. Yeo: Journal of Materials Processing Technology, Vol. 127 (2002), pp.191-198.

[4] X.Q. Jiang, J.J. M and L.C. Zhao: Bearing, Vol. 8 (2000), pp.1-4 (in Chinese).

[5] X.L. He, W.L. Xiong and H.W. Huang: Machine, Vol. 6 (2003), pp.15-17 (in Chinese).

[6] P. Ma, J.K. Li and D.N. Li: Mechanical Engineer, Vol. 4 (2004), pp.12-14 (in Chinese).

[7] G.C. Chen, L.Q. Wang and L. Gu: Journal of Navigation Dynamics, Vol. 1 (2007), pp.163-168.

[8] S.S. Li: Study of the Dynamic Cheracteristics about the Bearing-rotor System of Ultra high-speed Electric Spindles (Ph.D., Shanghai University, China 2006).

[9] S.S. Li, S.Y. Liu and Z.X. Li: Lubrication Engineering, Vol. 3 (1996), pp.26-28 (in Chinese).

[10] S.Z. Wen and P.R. Yang: Elasto-hydro Dynamic Lubrication (Tsinghua publishing company, China 1992).

[11] P.R. Yang: Hydro-lubrication (Industry of national defense publishing company, China 1998).

[12] H.Y. Sun: Analysis of Elasto-hydro Dynamic Lubrication in the coditions of High-speed and Over Loading (M.S., Qingdao engineering college of construction, China 2002).

[13] S.S. Li, T. T Zuo and Z.H. Hu: The 13th International manufacturing conference (Dalian, china, September 21-23, 2009). Vol. 8 No. 628-629, pp.83-88.