磁流体油膜轴承油的粘度特性研究  

Research and Analysis of Viscosity Properties for Magnetic-fluid-lubrication Oil-film Bearing Oil

作　　者：姜宏伟[1] 张亚南[2] 王建梅[2] 左正平[2] 张艳娟[2] 

机构地区：[1]太原重工技术中心太原重型机械集团,太原030024 [2]太原科技大学机械工程学院,太原030024

出　　处：《太原科技大学学报》2016年第5期400-405,共6页Journal of Taiyuan University of Science and Technology

基　　金：山西省自然科学基金项目(201601D011049);山西省专利推广实施资助专项(20161005);山西省研究生教育创新项目(2015113)

摘　　要：为了研究磁流体油膜轴承油的粘度特性,采用NDJ-5S数显旋转粘度计测定了不同磁场和温度作用下其粘度大小的变化情况;理论计算得到了磁流体的粘温特性以及磁粘特性曲线,结果表明,理论值与实验值相吻合。同时磁流体粘度随着磁场的增大而增大,随着温度的升高而减小。磁场较弱时会出现磁粘滞后现象,分析原因是外加磁场对链状结构的形成和分裂影响结果。当温度高于T℃后,粘度的增加主要取决于外加磁场的大小,与温度关系较小,说明在高温条件下通过控制磁场调节粘度是可行的。提供了一种通过电流控制磁场来改变磁流体粘度的方法,为油膜轴承油磁流体润滑性能的分析提供参考和依据。In order to study the viscosity properties of magnetic fluid used in oil-film bearing, the NDJ-SS digital viscometer was adopted to measure the viscosity of magnetic fluid under different magnetic field and different tem- perature. The results show that compared with the experimental value, the curve of viscosity-temperature properties and magnetic-viscosity properties for magnetic fluid in theoretical calculation shows that both are coincident with each other. Meanwhile, the oil-film viscosity will increase with the increase of the magnetic field, and decrease with the increase of the temperature. The appearance of magnetic stick hysteresis with the weakening magnetic field is the result of the formation and division of the chain structure affected by magnetic field. When the temperature is higher than T℃, viscosity increase mainly depends on the applied magnetic field, and has less relationship with the temperature, which means that controlling the magnetic field to adjust viscosity under the high temperature con- dition is feasible. This paper provides a method which can change magnetic liquid viscosity by current control field, and can provide reference and basis for further research on the lubricating performances of oil film.

关 键 词：磁流体 磁场 粘度特性 理论验证 

分 类 号：TM714[电气工程—电力系统及自动化]