超低温结晶器磁流体密封设计及仿真优化分析  

Design and simulation optimization analysis of magnetic fluid sealing for ultralow temperature crystallizer

作　　者：孟睿 朱维兵[1] 王和顺[1] 颜招强 MENG Rui;ZHU Wei-bing;WANG He-shun;YAN Zhao-qiang(School of Mechanical Engineering,Xihua University,Chengdu 610039,China;Zigong Zhaoqiang Sealing Products Industrial Co,Ltd,Zigong 643000,China)

机构地区：[1]西华大学机械工程学院,四川成都610039 [2]自贡兆强密封制品实业有限公司,四川自贡643000

出　　处：《磁性材料及器件》2024年第3期69-76,共8页Journal of Magnetic Materials and Devices

基　　金：四川省国际港澳台科技创新合作项目(2024YFHZ0338)。

摘　　要：针对传统密封应用在结晶器时存在泄漏及磨损等难题,以连续冷冻结晶器为研究对象,设计一种带有升温功能的新型磁流体密封装置。通过有限元软件对磁场及温度场进行分析,得到关键参数对密封耐压值的影响;采用正交实验法对参数进行优化,并采用控制变量法分析不同热水质量流率及密封间隙对磁流体温度的影响。结果表明:结构参数对密封性能的影响程度依次为:密封间隙>永磁体高度>永磁体宽度>槽宽>齿宽>齿高;优化后各结构参数为密封间隙0.3mm、极齿宽度1.2mm、槽宽3.6mm、极齿高度3.2mm时,密封耐压值为0.503MPa,高于优化前的0.384MPa;由于工况温度较低,为保障磁流体密封正常工作,需通入质量流率大于0.1kg/s的常温水。Aiming at the problems of leakage and wear in the mold in traditional sealing applications,a new magnetic fluid sealing device with heating function is designed with continuous freezing crystallizer as the research object.The magnetic field and temperature field are analyzed by finite element software,and the influence of key parameters on the sealing pressure withstand value is obtained.The orthogonal experimental method was used to optimize the parameters,and the control variable method was used to study the influence of different hot water mass flow rates and sealing gaps on the temperature of magnetic fluids.The results show that the influence of structural parameters on the sealing performance is as follows:sealing gap>permanent magnet height>permanent magnet width>groove width>tooth width>tooth height.After optimization,when the structural parameters are 0.3 mm sealing gap,1.2 mm pole tooth width,3.6 mm groove width and 3.2 mm pole tooth height,the sealing pressure resistance value is 0.503 MPa,which is higher than 0.384 MPa before optimization;due to the low working temperature,in order to ensure the normal operation of magnetic fluid sealing,room temperature water needs to be introduced and the mass flow rate must be greater than 0.1 kg/s.

关 键 词：超低温结晶器 磁流体密封 正交实验 密封耐压 温度场 参数优化 

分 类 号：TN713[电子电信—电路与系统]