推力轴承支承方式及间隙影响研究

The Influence of Supporting Pattern and Oil Film Clearance on Hydrodynamic Thrust Bearing

研究了推力轴承支承方式及油膜间隙对推力轴承性能的影响,利用Newton-Raphson法编制差分计算程序,求得了推力轴承Reynolds方程和二维能量方程的数值解,得到了不同支撑方式下瓦块的油膜厚度、压力分布和温度分布。计算结果表明,点支承扇形瓦推力轴承的热力学性能要好于线支承扇形瓦推力轴承,同时支承处的油膜厚度对瓦块的承载能力影响很大。可以通过控制每个瓦块支承处的油膜厚度,避免推力轴承内部偏载的发生,降低推力瓦块的最大温升。

The influence of different supporting patterns and oil film clearance on hydrodynamic thrust bearings were investigated. A numerical calculation program was developed to solve Reynolds equation, together with two-dimensional energy equation for hydrodynamic thrust bearing. Newton-Raphson computation technique was adopted in this program to solve the partial differential equations numerically. The numerical result of oil film thickness, pressure and temperature distributions on thrust pad were investigated for line supported pad and point supported pad. Results show that the performance of point supported pad is better than that of line supported pad ;the oil film clearance of each pad has much influence on the loading and it is much important to prevent any large clearance difference for each pad which will induce loading imbalance and higher temperature on individual pad.