Abstract：The finite element method and the finite difference method were used to solve the Reynolds equations, energy equations and temperature-viscosity equations together for a journal floating ring bearing. The inner and outer fluid film pressure distribution, temperature distribution and viscosity distribution were calculated and the pressure was integrated to calculate the bearing stiffness and damping coefficients. The unite dynamic equations were established for the shaft and floating ring, and the thermal instability criteria was derived for a single-mass rigid symmetric rotor system using energy equations and Routh－Hurwitz method. The results show that there are several temperature peaks in the inner and outer film pockets, and both of ends temperature are higher than the pocket center temperature. Inner and outer minimum fluid film thickness and threshold speed fall rapidly while the inlet temperature is increasing. The lubricant temperature rise is an important factor causing the floating ring bearing fluid film to rupture and be instable, so the lubricant thermal effect should be considered into the bearing performance analysis.
杨帅，郭红，张泽斌. 热效应对径向浮环轴承最小油膜厚度及稳定性影响研究[J]. 振动与冲击, 2020, 39(18): 215-222.
YANG Shuai,GUO Hong,ZHANG Zebin. Thermal effect on the minimum film thickness and stability for a journal floating ring bearing. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(18): 215-222.
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