摘要
基于流量因子统计学方法建立油封唇口的混合流体润滑模型,耦合油封的能量守恒方程及黏温方程,通过迭代求解获得油封唇口的温度分布、不同转速下油封唇口的最高温度及温差变化情况;对比分析考虑和不考虑温差情况下油封各项密封性能。结果表明:随着转速的增大,唇口最高温度线性递增,而唇口温差先增大后减小;油封工作时,唇口区域的温度先迅速升高后下降,越靠近唇尖的位置温度越高;与不考虑温度的情况比较,考虑温度变化的影响时密封区域的油膜厚度减小,油膜承载力下降,不利于密封。
Based on the statistical method of flow factor,a mixed fluid lubrication model of oil seal lip was established.The energy conservation equation and viscous-temperature equation of oil seal were coupled.The temperature distribution of oil seal lip,the maximum temperature and temperature difference of oil seal lip under different rotational speeds were obtained by iterative solution.The sealing performances of oil seal with and without considering the temperature difference were compared and analyzed.The results show that with the increase of rotational speed,the maximum lip temperature is increased linearly,while the lip temperature difference is increased first and then decreased.When oil seal works,the temperature in the lip area is increased rapidly first and then decreased,and the closer it is to the lip tip,the higher the temperature is.Compared with the case without considering temperature,when considering the influence of temperature change,the thickness of oil film in the sealing area is decreased and the lubrication state is deteriorated,and the bearing capacity of oil film is decreased,which is not conducive to sealing.
作者
张付英
杨俊梅
水浩澈
董城城
ZHANG Fuying;YANG Junmei;SHUI Haoche;DONG Chengcheng(College of Mechanical Engineering,Tianjin University of Science&Technology,Tianjin 300222,China;Key Laboratory of Integrated Design and On Line Monitoring of Light Industry and Food Engineering Machinery and Equipment in Tianjin,Tianjin 300222,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2020年第5期49-54,共6页
Lubrication Engineering
基金
天津市自然科学基金重点项目(17JCZDJC38800).
关键词
油封
唇口温度
温度变化
密封性能
oil seal
lip temperature
temperature change
sealing performance
