唇形油封动态散热仿真研究  

Simulation Research on Dynamic Heat Dispersion of Lip Seal

作　　者：赵良举[1] 张佳佳[1] 杜长春 苏晓燕[1] 

机构地区：[1]重庆大学动力工程学院,重庆400030 [2]重庆杜克高压密封件有限公司,重庆400039

出　　处：《计算机仿真》2011年第11期324-327,392,共5页Computer Simulation

基　　金：中央高校基本科研业务费资助项目(CDJZR11140002);重庆市自然科学基金资助项目(CSTC2007BB6184)

摘　　要：研究优化油封结构,提高散热效果,由于唇形油封在工作时与轴摩擦生热导致温度升高,容易造成材料破坏而引起油封的失效。在汽车实际运动过程中,由于封抱轴力太大,使部件温度升高,造成部件磨损。目前对于油封的散热机理还没有确切的认识。针对油封的高温失效问题,为优化油封的散热结构,提出建立了描述其固液传热的二维轴对称模型,利用Flu-ent软件的RNG k-ε湍流模型对油封的散热进行仿真。结果显示随着轴速的增加,摩擦面上的温度逐渐增加,摩擦面上温度最高点位于中心位置靠近空气侧,温度最低点位于润滑油侧的端点上,空气侧的温度分布整体高于润滑油侧的温度分布。油封唇口与轴之间产生的热量主要通过润滑油、轴被带走,通过空气带走的热量较少。通过研究或为油封有效散热提供了科学依据。The high working temperature of lip seal caused by friction can result in invalidation of lip seal because of the material damage.Researching the principle of heat dispersion of lip seal helps to choose parameters properly.But now the principle has not been understood clearly because the process relates to the knowledge of different subjects.To optimize lip seal＇s frame about heat dispersion,aiming at the invalidation of lip seal with high temperature,an axisymmetric two-dimensional model was established to describe the heat dispersion between solid and fluid and calculated with RNG k-ε turbulence model by the Fluent software.The results show that with the increase of shaft speed,the temperature increases on rubbing surface gradually.The highest temperature on rubbing surface appears at the center close to air side,while the lowest temperature appears on the endpoint near the engine oil.As a whole,the temperature distribution of air is higher than that of engine oil.The heat generated between lip seal and shaft is dissipated by engine oil and shaft mostly.Heat dissipation by air can be neglected.The experiment proves that the researching results help to choose designing parameters properly.

关 键 词：唇形油封 流体 摩擦 散热 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]