摘要
采用ANSYS有限元分析软件进行了较大密封间隙的典型三极齿磁流体密封结构的磁场有限元分析, 并将密封间隙的磁通密度分布分为轴向和径向分别进行分析和讨论。结果表明: 在靠近导磁轴的一侧, 中间极齿附近磁通密度差值远小于靠近极齿侧的差值; 同时密封间隙处存在显著的、会造成磁性液体纳米粒子浓度梯度分布的径向磁通密度梯度。这两个效应使靠近导磁轴一侧的区域成为密封截面上最薄弱环节, 是造成较大密封间隙的磁流体密封性能下降的主要原因。
The magnetic field of the typical magnetic fluid sealing structure with three pole teeth aside and big sealing gap was analyzed by element analysis software produced by ANSYS company. Magnetic flux density distribution analysis along the paths, parallel and perpendicular to the sealing gap direction respectively, was performed. The results show that the difference between the maximum and minimum flux density in the area near the magnetic shaft is less than that in the area near the pole teeth at the middle pole teeth region. The flux distribution grade along the radial direction is very notable, which can result in grade distribution of the magnetic nano-particle concentration. Both effect mentioned above make the near shaft region the weakest area of the whole sealing gap section.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2005年第1期79-81,共3页
Lubrication Engineering
