进油温度和轴颈转速对径向滑动轴承特性参数的影响

Effect of Oil-inlet Temperature and Rotor Rotary Speed on Characteristic Parameters of Hydrodynamic Radial Bearings

建立了径向滑动轴承的数学模型,推导了径向轴承的Reynolds方程、能量方程、油膜厚度方程和黏温方程。利用Fortran语言编制了程序,计算了油膜轴承的压力分布、温度分布以及特性参数,研究了进油温度和轴颈转速对轴承特性参数的影响。结果表明:最高油膜温度、最小油膜厚度和最大油膜压力等特性参数的位置所对应的角度随转速的增加有增大的趋势,随进油口温度的增加,其位置基本不变。特性参数位置的准确计算可以为滑动轴承特征参数的精确测量提供参考。

Mathematical model of hydrodynamic radial bearings was built up.Reynolds equation,energy equation,oil film thickness equation and viscosity-temperature equation about this type of the bearing were derived.A program was compiled by Visual Fortran language,which was used to calculate oil film pressure distribution,temperature distribution and characteristic parameters about radial bearings.Effect of oil-inlet temperature and rotor rotary speed on characteristic parameters of radial hydrodynamic bearings was investigated.Results indicate that corresponding position angle of such characteristic parameters as the highest temperature,the minimum thickness and the maximum pressure of oil film has a tendency to increase with the increasing of rotor rotary speed,and its position remains basically the same value with the increasing of oil-inlet temperature.Accurate position of characteristic parameters calculated can provide the reference for precise measurement of characteristic parameters about hydrodynamic bearings.