螺旋槽旋转密封环润滑状态转变预测  

Prediction of Lubrication Condition Transition for Spiral Groove Rotary Seal Rings

作　　者：赵一民[1] 胡纪滨[1] 吴维[1] 苑士华[1] 

机构地区：[1]北京理工大学车辆传动重点实验室,北京100081

出　　处：《机械工程学报》2013年第9期75-80,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51175031;51175038)

摘　　要：针对螺旋槽旋转密封润滑状态随转速变化,建立分析润滑特性的数学模型。采用有限体积法对雷诺方程进行数值离散,基于贴体坐标变换与质量守恒边界条件,获得了流体润滑模型。采用分形接触模型描述混合润滑状态时的粗糙峰接触特性。数学模型能够对混合润滑和流体润滑状态下的润滑特性进行模拟,获得了全转速范围内摩擦因数的变化规律,并得到了试验验证。得到了脱开转速,并拟合脱开转速随入口油压变化的规律曲线,利用该曲线能有效判断密封摩擦副润滑状态转变的转速。For the lubrication condition transition with speed variety of spiral groove rotary seal ring, a theoretical lubrication model is established. By applying the finite volume method to numerical discretization, and based on boundary fitted coordinate transformation and mass conservation boundary conditions, a film lubrication model is obtained. In the mixed lubrication state, the asperity contact properties are described by fractal contact model. Mixed and hydrodynamic lubrication are involved in the theoretical model, by which the variation of the frictional coefficient in the whole speed range is acquired and verified by experiment. separation speed is obtained, and the curve of separation speed changes with the oil pressure of entrance is fit. The curve can effectively judge the speed of the lubrication state change for the spiral groove rotary seal ring.

关 键 词：旋转密封 混合润滑 流体动力润滑 脱开转速 

分 类 号：TH117[机械工程—机械设计及理论]