磁性液体性能及运行工况对密封耐压值的影响  

Influence of Magnetic Liquid Properties and Operating Conditions on the Pressure Withstand Value of Sealing

作　　者：陈芳 张杰 李正贵 李望旭 邓波 闫盛楠 颜招强 CHEN Fang;ZHANG Jie;LI Zhenggui;LI Wangxu;DENG Bo;YAN Shengnan;YAN Zhaoqiang(School of Energy and Power Engineering,Xihua University,Chengdu Sichuan 610039,China;Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu Sichuan 610039,China;Zigong Zhaoqiang Sealing Products Industrial Co.,Ltd.,Zigong Sichuan 643020,China)

机构地区：[1]西华大学能源与动力工程学院,四川成都610039 [2]西华大学流体及动力机械教育部重点实验室,四川成都610039 [3]自贡兆强密封制品实业有限公司,四川自贡643020

出　　处：《润滑与密封》2024年第5期129-135,共7页Lubrication Engineering

基　　金：国家自然科学基金面上项目(52079118)。

摘　　要：为研究不同种类磁性液体及密封工况对密封效果的影响,以Fe_(3)O_(4)为磁性颗粒,以链状氟醚油为基液,制备一系列不同颗粒含量、基液分子量的磁性液体,对磁性颗粒及磁性液体的结构、性能进行表征,在搭建的密封试验台上测试磁性液体种类及运行工况对密封耐压效果的影响。结果表明:制备的磁性颗粒粒径为纳米级,呈近球形形貌,具有较高的饱和磁化强度,磁性液体具有较好的分散稳定性;随颗粒含量增加、基液分子量增大,密封耐压值先增大后减小;在颗粒质量分数为30%、基液分子量为4600 g/mol时,密封耐压值最高;随主轴转速增大,密封耐压值逐渐减小;随密封时间延长,密封耐压值先减小后趋于稳定。For research the effect of ferrofluids types and sealing conditions on the sealing effective,Fe_(3)O_(4) used as mag-netic particles,the chain PFPE-oil used as base liquid,and a series of ferrofluids with different particle concentrations and different molecular weights of base liquid were prepared,and the effects of the type of ferrofluids and operating conditions on the sealing pressure resistance were obtained.The structures and performances of magnetic particles and ferrofluids were characterized.The ferrofluids types and sealing conditions were test on the built sealing test bench.The results show that the prepared magnetic particles have nanometer size,near-spherical morphology,high saturation magnetization,and the fer-rofluid has good dispersion stability.With the increase of particle content and molecular weight of base liquid,the sealing pressure increases first and then decreases.When the mass fraction of particles is 30%and the molecular weight of the base liquid is 4600 g/mol,the withstand value of sealing pressure is the highest.With the increase of spindle speed,the sealing pressure value decreases gradually.With the extension of sealing time,the sealing pressure value decreases first and then becomes stable gradually.

关 键 词：磁性液体 密封耐压值 饱和磁化强度 密封寿命 分散稳定性 

分 类 号：TH136[机械工程—机械制造及自动化]