斜面型自补偿油封的热-结构耦合分析  

Thermal-structural coupling analysis of inclined self-compensating oil seal

作　　者：张乐 何立东[1] 明玉周 王晓东 贾兴运 王文昊 ZHANG Le;HE Li-dong;MING Yu-zhou;WANG Xiao-dong;JIA Xing-yun;WANG Wen-hao(Chemical Safety Education Engineering Research Centre,Beijing University of Chemical Technology,Beijing 100029,China;China Institute of Atomic Energy,Beijing 100029,China;Inner Mongolia Power Machinery Institute,Hohhot 010011,China)

机构地区：[1]北京化工大学化工安全教育部工程研究中心,北京100029 [2]中国原子能科学研究院,北京100029 [3]内蒙古动力机械研究所,内蒙古呼和浩特010011

出　　处：《机电工程》2023年第7期1054-1060,共7页Journal of Mechanical & Electrical Engineering

基　　金：中国博士后科学基金资助项目(2020M670113);北京市自然科学基金资助项目(3224066)。

摘　　要：传统唇形油封在使用过程中,存在不耐高温、耐磨性能差、摩擦生热高、使用寿命短等问题,为此,提出了一种使用斜面型自补偿油封代替传统的唇形油封的方法,利用数值分析软件进行了油封的热-结构耦合分析,探究了摩擦温度对油封热应力的影响规律。首先,利用数值分析软件建立了斜面型自补偿油封的动力学模型,采用热-结构耦合的分析方法,进行了油封温度场的求解;然后,引入温度场对油封应力进行了求解,对比分析了相同工况下唇形油封和斜面型自补偿油封温度场的区别;最后,搭建了高压高转速密封实验台,使用PT100温度传感器、瞬态液晶测量等新技术,进行了密封点-面测温,开展了斜面型自补偿油封温升特性的实验研究。实验结果表明:斜面型自补偿油封摩擦温升较唇形油封低,唇形油封的高摩擦生热性及材料的高弹性造成了唇形油封热应力集中,影响了唇形油封的使用寿命;在相同工况下,斜面型自补偿油封较唇形油封摩擦温升低,转子转速每增加1000 r/min,唇形油封的温度平均上升16.9%,斜面型自补偿油封的温度平均上升14.1%;转子转速在3000 r/min~4000 r/min时,斜面型自补偿油封稳定时的温度比唇形油封低21.1%~26.3%。研究结果表明:在相同工况下,斜面型自补偿油封的温升要低于唇形油封;斜面型自补偿油封的低摩擦温升,对于提高密封的使用寿命具有指导意义。Aiming at the shortcomings of traditional lip seal,such as low temperature resistance,poor wear resistance,high friction heat generation and short service life,a method of replacing the traditional lip oil seal with inclined self-compensating oil seal was proposed,and the thermal-structural coupling analysis of oil seal was carried out by using numerical analysis software,to explore the influence law of friction temperature on thermal stress of oil seal.Firstly,the dynamic model of the inclined self-compensating oil seal was established by using the numerical analysis software.The thermal structural coupling analysis method was used to solve the temperature field of the oil seal.Then the temperature field was solved for the oil seal stress,so as to compared and analyzed the difference between the temperature field of the lip seal and the inclined self-compensating oil seal under the same working condition.Finally,a high-pressure and high-speed sealing test-bed was built,and the new technologies such as PT100 temperature sensor and transient liquid crystal measurement were used to measure the sealing point-surface temperature.The experimental study on the temperature rise characteristics of inclined self-compensating oil seal was carried out.The experimental results indicate that the friction temperature rise of the bevel self-compensating oil seal is lower than that of the lip seal.The high friction heat generation of the lip seal and the high elasticity of the material cause the thermal stress concentration of the lip seal and affect the service life of the lip seal.Under the same working condition,the friction temperature rise of the inclined self-compensation seal is lower than that of the lip seal.For every 1000 r/min increase in rotor speed,the temperature of the lip seal rises by an average of 16.9%,and the temperature of the inclined self-compensation seal increases by an average of 14.1%.When the rotor speed is 3000 r/min~4000 r/min,the temperature of inclined self-compensation seal is 21.1%~26.3%lower th

关 键 词：唇形油封 耐磨性能 使用寿命 热-结构耦合分析 瞬态液晶测温 摩擦温度 油封热应力 油封温度场 

分 类 号：TH134[机械工程—机械制造及自动化] TB42[一般工业技术]