摘要
密封环端面温度是影响静压式干气密封性能的重要因素,可以直接表征密封的工作状态。采用有限元分析软件,通过求解传热方程的方法,建立静压式干气密封环的温度场分析模型,分析异常接触条件下与正常工作条件下密封环端面的温度分布及特点。结果发现:异常接触条件下的密封环端面温度比正常工况条件下高约76.6%;膜厚增加会使密封环端面温度小幅下降,转速增加会使密封环端面温度大幅升高;腔体压力升高会使端面温度小幅下降,腔体温度升高也会使端面与腔内温差增大。分析温度场对密封性能的影响,发现随着温度的增加,密封开启力缓慢增加,而泄漏量和刚度均有所下降。提出通过温度监测的方式对密封运行状态进行实时监控的方法,并通过试验验证了该方法的可行性。
The temperature of seal ring ending face is an important factor affecting the performance of hydrostatic dry gas seal,which can directly represent the working state of seal.The temperature field analysis model of the hydrostatic dry gas seal ring was established by solving the heat transfer equation with finite element analysis software,and the temperature distribution and the characteristics of the seal ring end face under abnormal contact conditions and normal working conditions were analyzed.The results show that the temperature of sealing ring end face under abnormal contact condition is about 76.6%higher than that under normal working condition.The temperature of the seal ring end face slightly decreases with increase of film thickness,and the temperature of the seal ring end face significantly increases with the increase of rotating speed.The temperature of the end face slightly reduce with the increase of cavity pressure,and the temperature difference between the end face and the cavity increases with increase of cavity temperature.The influence of temperature field on sealing performance was analyzed.It is found that with the increase of temperature,the sealing opening force increases slowly,while leakage and stiffness decrease.The method of real-time monitoring of seal running state through temperature monitoring was proposed,and the feasibility of this method was verified by experiments.
作者
贾宇宁
李双喜
张敬博
宋玉鹏
JIA Yuning;LI Shuangxi;ZHANG Jingbo;SONG Yupeng(School of Electromechanical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2022年第12期16-24,共9页
Lubrication Engineering
基金
国家重点研发计划项目(2018YFB2000800)。
关键词
静压式干气密封
温度场
状态监测
密封环
hydrostatic dry gas seal
temperature field
condition monitoring
sealing ring
