铁磁性流体自密封润滑滑动轴承特性的研究

Study of the performance of the composite journal bearing sealed and lubricated with ferrofluid

建立了铁磁性流体自密封润滑滑动轴承静动特性的计算模型，用差分法对轴承的油膜压力方程、温度方程以及轴瓦导热方程进行了联立求解，计算和分析了该模型轴承在不同偏心率和不同长径比等工况下的静动特性。结果表明，在小偏心率和小长径比条件下，采用该模型轴承是可行的，轴承油膜温度比有端泄轴承的相应值高，轴承转速是影响油膜温度的主要因素。

The theoretical computation model of the composite journal bearing sealed and lubricated with ferrofluids is established. The oil film pressure distribution, temperature field and heat conduction equation of the bearing liner are jointly calculated. The static and dynamic properties of the bearing under the condition of different eccentricities and ratios of width to diameter are obtained and discussed. The results show the feasibility of this type of bearing for smaller eccentricities and ratios of width to diameter, and that the oil film temperature of the bearing, which is more subject to be influenced by the rotating speed, is higher than that of the bearing with leakage flow. The key problem of the development and application of the bearing is to design more reasonable and effective types of seal structure.