基于分形理论的接触式机械密封端面摩擦热模拟计算  

Simulation Calculation of Frictional Heat of the End Face of Contact Mechanical Seals Based on Fractal Theory

作　　者：房桂芳 魏龙 张鹏高 Fang Guifang;Wei Long;Zhang Penggao(Fluid Sealing Measurement and Control Engineering Research and Development Center of Jiangsu Province,Nanjing Polytechnic Institute,Nanjing 210048,China)

机构地区：[1]南京科技职业学院,江苏省流体密封与测控工程技术研究开发中心,南京210048

出　　处：《流体机械》2020年第5期38-43,共6页Fluid Machinery

基　　金：江苏省高校自然科学研究项目(17KJB530007);江苏省第五期“333工程”科研项目(BRA2017482)。

摘　　要：通过模拟计算,分析工作参数和端面形貌分形参数对接触式机械密封端面摩擦热的影响.基于机械密封端面接触分形模型,考虑密封端面摩擦热、摩擦系数、端面温度之间相互影响的关系,提出了密封端面摩擦热的耦合计算方法.对内流式部分平衡型机械密封端面摩擦热的影响因素进行了计算分析.结果表明,随着弹簧比压或密封流体压力的增大,密封端面摩擦热线性增大;随着转速的增大,密封端面摩擦热近似线性增大,且密封端面越光滑,摩擦热的增量越大;随着端面分形维数的增大或特征尺度系数的减小,密封端面摩擦热非性线增大,且随着密封端面趋于光滑,摩擦热的增幅变大.The effects of the working parameters and the end face fractal parameters on frictional heat on the end faces of contact mechanical seal were analyzed by simulation calculation.Based on the contact fractal model of seal end face,and taking into account the mutual influencing relationship between frictional heat,friction coefficient and temperature of seal face,the coupling calculation method of frictional heat was proposed.Influencing factors of frictional heat for partial balance mechanical seal with inward leakage were analyzed by calculation.The results indicate that the frictional heat of seal face increased linearly with increasing spring pressure and sealant pressure;and increased approximately linearly with increase of rotating speed,and the smoother the seal face,the greater the increase.Frictional heat of seal face increased nonlinearly with increasing fractal dimension or decreasing characteristic length scale,and the increasing magnitude of frictional heat became bigger as the seal face becomes smoother.

关 键 词：机械密封 端面 摩擦热 模拟计算 分形理论 影响因素 

分 类 号：TH136[机械工程—机械制造及自动化] TH117.1