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Comparison of experiments and simulations of thermal characteristics of a bearing-rotor system

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Abstract

The hydrostatic spindle system is the main internal heat source of the machine tool, thus it is very significant to study the thermal behaviors of the hydrostatic spindle system. The purpose of this study is to investigate the effect of viscosity-temperature effect of lubricant on the temperature fields of hydrostatic bearing oil film and spindle thermal deformation. To study the effect of temperature rise of hydrostatic bearing oil film on the hydrostatic spindle and bearing bush, empirical equations, CFD, and experimental methods are used in this paper. Firstly, the temperature rise of hydrostatic bearing is obtained by the theoretical calculation method. Secondly, based on the CFD, the temperature field of lubricating oil film is compared and analyzed with consideration of viscous temperature effect and constant value of viscosity. Based on the fluid-thermal-solid coupling method, the thermal deformation of the spindle is analyzed. Finally, the experimental platform of the hydrostatic spindle is built and the accuracy of the simulation results was verified. The study shows that when the viscosity-temperature effect is considered, the values of oil film temperature rise and spindle thermal deformation are closer to the experimental values, and the error rates of bearing temperature and spindle thermal deformation are smaller than those when the viscosity is fixed.

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Data availability

Data in the paper are not related to other published datasets. This paper lists some relevant data of the method in the figures and tables, and other data are available from the corresponding author upon request.

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Funding

This research was funded by the National Natural Science Foundation of China Grant No. (51875005 and 51475010).

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Authors and Affiliations

  1. Beijing Key Laboratory of Advanced Manufacturing Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China

    Dongju Chen, Jia Li, Kun Sun, Ri Pan & Jinwei Fan

  2. Beijing Institute of Control Engineering, Beijing, China

    Yuhang Tang

Authors
  1. Dongju Chen
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  2. Jia Li
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  3. Yuhang Tang
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  4. Kun Sun
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  5. Ri Pan
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  6. Jinwei Fan
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by DC and JL. The first draft of the manuscript was written by JL and all authors (DC, JL, YT, KS, RP, and JF) commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Dongju Chen or Yuhang Tang.

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Technical Editor: Daniel Onofre de Almeida Cruz.

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Chen, D., Li, J., Tang, Y. et al. Comparison of experiments and simulations of thermal characteristics of a bearing-rotor system. J Braz. Soc. Mech. Sci. Eng. 45, 207 (2023). https://doi.org/10.1007/s40430-023-04118-9

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  • DOI: https://doi.org/10.1007/s40430-023-04118-9

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