本文首先介绍了作者以前总结出的一套较为完整的磁流体真空转轴动密封结构设计的计算方法，然后针对几种常见的具体工况，提出密封结构最优化设计的目标，其中包括：最佳密封总体结构型式的选择；极齿设置在极靴上和设置在转轴上两种不同结构的比较；密封间隙的最优化取值；耐压值最大的结构优化计算和二轴向长度最短的结构优化计算。以上优化设计结果都可直接用于磁流体真空转轴动密封的具体工程设计之中。 In this paper, the author first introduces a set of more complete magnetic fluid vacuum shaft dynamic seal structure design calculations, and then for several common specific conditions, the proposed seal structure optimization design goals, including: the best Sealing the overall structure of the type of choice; polar teeth set in the pole piece and set in the shaft on the two different structures of comparison; optimal sealing gap value; maximum withstand voltage structure optimization calculation and the structure of the shortest two axial length Optimization calculation. The above optimization design results can be directly used in the magnetic fluid vacuum shaft dynamic seal of the specific engineering design.