摘要
利用有限元模拟得到油封唇口的柯西接触应力和接触宽度,并计算得到油膜厚度;建立二维轴对称CFD数值模型,考虑油封橡胶的导热和散热作用,模拟油封唇口温度场分布;通过红外测温实验对模拟结果进行验证。CFD数值模拟结果表明:生热率、唇口最高温度和油封唇口与轴表面最大温差都随轴转速增加而增加;生热率和油封唇口与轴表面最大温差随油温增加而减小,唇口最高温度随油温增加而增加;油温对油膜厚度的影响大于轴转速对油膜厚度的影响,而转速是影响唇口最高温度的最主要因素;考虑油封橡胶的导热和散热作用,能够更加真实地反应出油封的摩擦生热和散热机制。红外测温实验结果与CFD数值模拟结果的偏差小于2%,说明CFD数值模拟得到的油封温度场与实际相符。
The contact Cauchy stress and contact width simulation, and the oil film thickness was calculated. A two of oil lip seal were simulated by finite element numerical dimension CFD numerical model was built to simulate the temperature field of oil seal with considering the effects of thermal conduction and dissipation of oil seal rubber, and the simulated results were verified by infrared temperature measurement experiments.The results of CFD simulation show that the heat production rate, the maximum temperature of the seal lip and the maximum temperature difference between oil seal lip and shaft surface are all increased with the increasing of shaft speed. The heat production rate and the maximum temperature difference between oil seal lip and shaft surface are reduced with the increasing of oil temperature, but the maximum temperature of the seal lip is increased.The effect of oil temperature on oil film thickness is larger than that of rotating velocity of a shaft ,while the velocity is the main factor influencing the maximum temperature of an oil lip seal.The mechanism of thermal generation by friction and thermal dissipation can be shown more truly when considering the effect of thermal conduction and dissipation of oil seal rubber.The difference between infrared temperature measurement experiment results and CFD simulation results is less than 2%,indicating the temperature field simulated agrees well with the actual temperature field.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第11期41-46,共6页
Lubrication Engineering
基金
重庆市自然科学基金项目(CSTC2007BB6184)
中央高校基本科研业务费项目(CDJZR11140002)
关键词
油封
黏性生热
温度场
红外测温
oil lip seal
viscous heating
temperature field
infrared temperature measurement
