| Citation: | CAO Saisai, YANG Haisheng, LUO Bin, et al. Dynamic analysis of aero-engine spindle ball bearings with thermal-mechanical coupling[J]. Journal of Aerospace Power, 2024, 39（12）：20220890 doi: 10.13224/j.cnki.jasp.20220890
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In order to analyze the dynamic characteristics of aero-engine bearings more accurately, a thermal-mechanical coupling dynamic model of aero-engine spindle ball bearings was established based on the dynamic theory of rolling bearings and heat transfer theory. Then, the dynamic differential equations were solved using the GSTIFF variable step size integral algorithm, and the effects of bearing oil supply and temperature on bearing temperature and bearing dynamics were analyzed. The results showed that the dynamic characteristics of ball bearings were greatly affected by bearing heat generation when ball bearings were running at high speeds. When the oil supply increased, the bearing temperature and the collision force between the ball and the cage were reduced. However, too much oil supply could lead to an increase in bearing cage vibration. The oil supply temperature mainly affected the bearing temperature and lubricating oil viscosity. The acting force between the cage and the guide ring decreased with the increase of the oil supply temperature. The bearing cage vibration was minimal when the oil supply temperature was 120 ℃.
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