Volume 31 Issue 1
Jan.  2016
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SHI Xiu-jiang, WANG Li-qin, GU Le, ZHENG De-zhi, ZHAO Xiao-li. Thermal elastohydrodynamic lubrication analysis of aero-engine mainshaft ball bearing based on quasi-dynamic[J]. Journal of Aerospace Power, 2016, 31(1): 233-240. doi: 10.13224/j.cnki.jasp.2016.01.030
Citation: SHI Xiu-jiang, WANG Li-qin, GU Le, ZHENG De-zhi, ZHAO Xiao-li. Thermal elastohydrodynamic lubrication analysis of aero-engine mainshaft ball bearing based on quasi-dynamic[J]. Journal of Aerospace Power, 2016, 31(1): 233-240. doi: 10.13224/j.cnki.jasp.2016.01.030

Thermal elastohydrodynamic lubrication analysis of aero-engine mainshaft ball bearing based on quasi-dynamic

doi: 10.13224/j.cnki.jasp.2016.01.030
  • Received Date: 2014-05-24
  • Publish Date: 2016-01-28
  • Taking aero-engine mainshaft ball bearing under typical high speed and load conditions as cases, the motion and loaded states of micro-contact region were obtained based on quasi-dynamic analysis, and the minimum film thickness(MFT) was estimated with Hamrock-Dowson(H-D) formula and ZHAI Wenjie thermal modified formula; meanwhile, the MFT under various conditions was acquired through thermal elastohydrodynamic lubrication(EHL) analysis. Comparing the MFT of experiment testing, H-D, ZHAI Wenjie and numerical analysis, the EHL status was ensured by film thickness ratio. Results indicate that H-D and ZHAI Wenjie's MFT have large difference with experiment results, but numerical analysis shows a well agreement with experiment data and the error is within 10%.The operating condition effects on EHL property were discussed. Results indicate the global film pressure increases and the thickness decreases in the presence of radial load; the film pressure decreases and the thickness increases with the increase of speed, but the trend becomes slower.

     

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