多瓦可倾瓦轴承的瞬态热弹流润滑性能分析  

Transient Thermal Thermal Elastohydrodynamic Lubrication Performance of Multi-tilting-pad Journal Bearing

作　　者：余谱[1] 汪久根[1] 王庆九[1] 

机构地区：[1]浙江大学机械工程学系,浙江杭州310027

出　　处：《润滑与密封》2014年第1期5-8,共4页Lubrication Engineering

基　　金：浙江省自然科学基金重点项目(Z1100475);国家自然科学基金项目(50775202);浙江省滑动轴承工程技术研究中心建设计划项目(2012E10028)

摘　　要：建立多瓦可倾瓦轴承瞬态热弹流润滑的数学模型,分析多瓦可倾瓦轴承在启动阶段的瞬态润滑性能,通过计算得到轴承由初始位置运动到平衡位置的轴心运动轨迹,并得到平衡位置时轴承的各项润滑性能参数,包括油膜厚度、流体动压力、瓦面温度与瓦面热弹变形等。结果表明,在开机启动阶段,轴心轨迹需要经历一段时间历程才能收敛于平衡位置,在载荷较小情况下,热变形对润滑性能的影响要比弹性变形大。A mathematical model of the multi-tilting-pad journal bearings in terms of thermal elastohydrodynamic lubri- cation （EHD） was established, and the transient lubrication performance of multi-tilting-pad journal bearings was analyzed. The orbit of shaft center from initial position to equilibrium position was obtained with full numerical simulation, and the lubrication performance at equilibrium position was studied, including film thickness, hydrodynamic pressure, temperature and thermal distortion and elastic deflection of pad face. The results show that the shaft center needs a quite long time to a- chieve the equilibrium position, and thermal distortion has a greater influence on the lubrication performance compared with the elastic deflection under a light load.

关 键 词：多瓦可倾瓦 瞬态 轴心轨迹 热效应 热弹流润滑 

分 类 号：TH117[机械工程—机械设计及理论]