基于流固耦合的旋转轴唇型油封流场特性及泵汲率研究  

Study on Flow Field Characteristics and Pump Drainage Rate of Rotary Shaft-lip Seal Based on Fluid-solid Coupling

作　　者：温智炜 闫素英[2] 苏世良 李霁舟 Wen Zhiwei;Yan Suying;Su Shiliang;Li Jizhou(School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]内蒙古工业大学能源与动力工程学院,呼和浩特010051

出　　处：《流体机械》2020年第4期6-11,共6页Fluid Machinery

基　　金：国家创新创业训练计划基金项目(201910497117)。

摘　　要：为研究具有回油沟的橡胶旋转轴唇型密封的流动行为与回油机制,构建润滑油与橡胶的流固耦合模型,对其进行流场、唇部应力、变形及其影响因素分析,并通过试验进行验证。结果表明:以泵汲率作为油封性能指标,在转速1000~6000 r/min范围内,试验测量与数值计算的泵汲率均随着转增加而提高,且在高转速下,流固耦合模型预测的泵汲率比刚体模型更接近实验值。回油沟长度或宽度增加时,有助于高压累积,增加了空气侧与油侧的压差,造成流速加快,单位时间内将有较大流量通过油膜,因此增大泵汲率。但在相同的参数变动率下,接触宽度对泵汲率影响效果不明显,当回油沟与唇尖角度增大时,泵汲率呈现递减趋势,当回油沟角度减少25%时,泵汲率约提高50%。In order to study the flow behavior and oil return mechanism of rubber rotary shaft lip seal with oil return groove,a fluidsolid coupling model of lubricant and rubber was established,and its flow field,lip stress,deformation and its influencing factors were analyzed,Which verified by experiments.The results show that:Taking the pumping rate as the performance index of oil seal,the pumping rate measured by experiment and calculated by numerical calculation increases with the increase of rotation speed in the range of 1000 r/min to 6000 r/min.And the pumping rate predicted by the fluid-solid coupling model is closer to the experimental value than that predicted by the rigid body model.When the length or width of the return ditch increases,the pump swabbing rate can be increased,but the effect of the contact width on the pump swabbing rate is not obvious under the same parameter change rate.When the angle between the return groove and the lip tip increases,the pump draw rate shows a decreasing trend.

关 键 词：流固耦合 旋转轴唇形密封 流场 泵汲率 

分 类 号：TH3[机械工程—机械制造及自动化] TB42[一般工业技术]