圆轴承流体润滑热效应模型及其应用  

Thermohydrodynamic Model and Application of Circular Journal Bearing

作　　者：刘大全[1] 张文[1] 郑铁生[1] 

机构地区：[1]复旦大学力学与工程科学系,上海200433

出　　处：《润滑与密封》2005年第4期122-125,165,共5页Lubrication Engineering

基　　金：国家自然科学基金重大项目(19990510);国家重点基础规划项目(G1998020316).

摘　　要：提出了对轴向解析、周向有限元压力分布的有限宽圆轴承模型进行流体动力润滑热效应分析的方法。该方法采用绝热边界条件,能量方程无需与雷诺方程迭代求解,即可确定出油膜沿周向方向的平均温度场和粘度场分布;基于变分不等方程理论,雷诺方程采用一维直接解法求解。应用提出的方法计算了流体润滑热效应对进油槽位于水平方向两侧的圆轴承承载系数、偏位角和压力分布的影响,与工程上的标准数据计算结果吻合,方法简单适用,节约计算量。An analysis method of the thermohydrodynamic model of finite circular journal bearing which is defined by analysis formula in the axial direction and distributed by finite element in the circumferential direction was presented.The energy equation and the Reynolds equation are uncoupled.The temperature and viscosity field in the circumferential can be obtained by imposing an adiabatic boundary condition on the bush inner surface.Based on the theory of variational inequality,a direct solution method of one-dimensional problem is developed which efficiently solves the Reynolds equation.As an application, thermohydrodynamic solutions of the dimensionless load-carrying capacity,pressure distribution and the attitude angle for circular journal bearing with two axial grooves in the horizontal direction were presented.Results were authenticated by comparison with engineering standard data.The simple new method possesses a high efficiency in solving applied engineering problems.

关 键 词：圆轴承模型 绝热边界条件 平均温度场 直接解法 

分 类 号：TH133.3[机械工程—机械制造及自动化]