隔气式磁流体水密封寿命的实验研究  

Lengthening of Magnetic Fluid Sealing-Life with Self-Developed Gas Isolator:An Experimental Study

作　　者：王虎军[1] 何新智[2] 张艳娟 Wang Hujun;He Xinzhi;Zhang Yanjuan(China University of Labor Relations,Beijing 100048,China;School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Mechanical-Electronic and Vehicle Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]中国劳动关系学院,北京100048 [2]北京交通大学机械与电子控制工程学院,北京100044 [3]北京建筑大学机电与车辆工程学院,北京100044

出　　处：《真空科学与技术学报》2020年第12期1197-1201,共5页Chinese Journal of Vacuum Science and Technology

基　　金：中国劳动关系学院校级科研一般项目(20XYJS008);国防科技创新特区项目(编号:18-163-21-Ts-001-007-01)。

摘　　要：磁流体旋转密封液体时,因磁流体与被密封液体界面存在稳定性问题,密封寿命较低。为提高其密封性能,设计了隔气式磁流体密封,避免磁流体与被密封液体直接接触,研究了该结构的密封原理,搭建了隔气式磁流体密封实验台,在该实验台上进行了磁流体密封水的耐压能力实验和密封寿命实验。理论与实验研究结果表明,隔气式磁流体密封结构对水的密封寿命明显延长,在各转轴转速下连续稳定工作120 h不泄漏,密封性能明显优于磁流体与被密封液体直接接触时的密封性能。The influence of the self-developed compressed gas isolator,inserted between the magnetic fluid and sealed water,on the sealing life was theoretically analyzed and experimentally investigated with the lab-built test platform for design optimization of gas isolator.The critical pressure and sealing life of magnetic fluid seal were measured.The results show that the newly-designed gas isolator significantly increases the magnetic fluid sealing life because of the effective isolation of magnetic fluid and water and because of the removal of unstable interface of magnetic fluid and water.The measured and calculated results were in good agreement.To be specific,tested at different shaft rotation speeds and at different pressures for a time longer than 120 h,no leakage had been ever observed.We suggest that the newly-developed gas isolator may be of some technological interest in application of magnetic fluid seal for sealing a variety of aqueous solutions.

关 键 词：磁流体密封 密封液体 气体隔离 密封寿命 

分 类 号：TB43[一般工业技术]