Volume 48 Issue 6
Jun.  2022
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GAO Ning, LI Huacong, HONG Linxiong, et al. Reliability analysis of journal bearings inside aero-gear pump based on AK-IS method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(6): 1057-1064. doi: 10.13700/j.bh.1001-5965.2020.0713(in Chinese)
Citation: GAO Ning, LI Huacong, HONG Linxiong, et al. Reliability analysis of journal bearings inside aero-gear pump based on AK-IS method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(6): 1057-1064. doi: 10.13700/j.bh.1001-5965.2020.0713(in Chinese)

Reliability analysis of journal bearings inside aero-gear pump based on AK-IS method

doi: 10.13700/j.bh.1001-5965.2020.0713
Funds:

National Science and Technology Major Project 2017-V-0013-0065

More Information
  • Corresponding author: LI Huacong, E-mail: lihuacong@nwpu.edu.cn
  • Received Date: 26 Dec 2020
  • Accepted Date: 07 May 2021
  • Publish Date: 20 Jun 2022
  • To study the hydrodynamic lubrication reliability of journal bearings inside aero-gear pumps running at high speed and with low medium viscosity, an elastohydrodynamic lubrication (EHL) model considering elastic deformation of bearing bush is established by coupling Reynolds lubrication equation with influence matrix. Considering the uncertainty caused by the size tolerance and operating conditions of journal bearings, the peak pressure of hydrodynamic lubrication, which is closely related to the lubrication characteristics of journal bearings, is taken as the reliability criterion. The AK-IS method combining adaptive Kriging and importance sampling is used to calculate the reliability and sensitivity of the hydrodynamic lubrication characteristics of journal bearings. The results show that considering bearing deformation, the pressure peak value of journal bearings is 15.04% lower than that of rigid bearings, and hence the influence of EHL on hydrodynamic lubrication of bearings cannot be neglected. The results also show the accuracy and efficiency of the AK-IS based reliability analysis of hydrodynamic lubrication of journal bearings. Moreover, the degree of the effect of various uncertainties on the reliability of hydrodynamic lubrication is different, with the radius clearance of bearings being the most sensitive to reliability, and the rotational speed the least.

     

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