可倾瓦轴承瓦块摆动特性  

Swing characteristic of pads in tilting pad bearing

作　　者：王永亮[1] 刘占生[1] 钱大帅[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2011年第9期62-66,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(10632040)

摘　　要：研究可倾瓦轴承瓦块摆动几何关系,基于分离变量法建立了有限长轴承油膜压力模型及瓦块力矩平衡方程,获得瓦块摆角与轴承参数之间的函数关系;以瓦块包角为80°、支点偏移量为0.5的四瓦块可倾瓦轴承为研究对象,计算分析其瓦块的摆动特性.理论推导表明,瓦块静平衡摆角只与瓦块结构参数、轴颈相对瓦块偏心率、间隙比有关,而与轴颈转速、油膜粘度等无关;数值仿真结果表明,当瓦块结构参数一定时,瓦块静平衡摆角随原始偏心率增大呈先增大后减小趋势,随轴承间隙比增大呈线性增加趋势.研究结果为建立工程实用的可倾瓦轴承非线性油膜力模型提供理论依据.The geometric relations of pad on tilting-pad bearing were studied,the relationship between tile pendulum angle and structural parameters were established by the oil-film force model of finite length tilting pad bearing and equilibrium equation,and the basic law of tile pendulum angle change was analyzed.The study shows that the tile pendulum angle is determined by the pad structural parameters,the eccentricity ratio of tilting pad bearing and the clearance ratio,but independent of shaft rotating speed,viscosity of lubrication oil,etc.A case study of a tilting pad bearing with 80 deg pad arc angle,0.5 offset was performed to illustrate the law of tile pendulum angle varies with eccentricity ratio and clearance ratio.It is revealed that,when the structural parameters of tilting pad bearing are constant,the tile pendulum angle increases first and then decreases with the original eccentricity ratio increases,and increases linearly with the increasing of bearing clearance ratio.

关 键 词：可倾瓦 瓦块摆动 原始偏心率 间隙比 

分 类 号：TH133.3[机械工程—机械制造及自动化]