作　　者： ; ; ; ; ;

机构地区： 北京交通大学机械与电子控制工程学院

出　　处： 《润滑与密封》 2009年第12期48-51,共4页

摘　　要： 在磁流体密封理论及磁场和磁场力计算理论的基础上,用Pro/E和Ansys软件联合建立密封结构的三维模型并用Ansys软件计算磁场分布和磁场力。在验证了计算方法的可行性后,计算某典型的三槽四齿密封结构在密封间隙分别为0.1mm和0.2mm时多种偏心量下的磁场分布和转轴受力。结果表明,磁流体的密封耐压随偏心率的增加而减小,且间隙越小,耐压对偏心量的变化越敏感;转轴受到的磁场力随偏心率的增大而增大,且依赖关系近似呈线性。进一步的分析表明,转轴偏心时受到磁场力的作用不是轴承失效的主要原因。 Based on the theory of magnetic fluid seal and the theory of calculation of magnetic field and magnetic force, three-dimensional models of sealing structure were build using Pro/E and Ansys software, and the magnetic field and mag- netic force were calculated in Ansys. After the feasibility of the calculation method was verified, magnetic field and magnet- ic force exerted on the shaft in an typical sealing structure with three teeth and four grooves were calculated when the seal- ing gap was 0. 1 mm and 0. 2 mm in different eccentric value. The results show that the pressure capability of magnetic flu- id seal decreases with the increase of eccentricity and the pressure capability changes more sensitively with the gap when the gap is smaller. The magnetic force exerted on the shaft increases linearly with the increase of eccentricity and this force is so small that it is not the main cause of bearing failure.

关 键 词： 磁流体 密封 转轴偏心 磁场力

领　　域： [一般工业技术]