【摘要】 为解决磁性液体高速密封时离心力导致的磁性液体流失以及耐压传递过程中磁性液体损失引起的密封性能下降，设计一种分瓣式交错对齿型磁性液体密封结构。通过有限元磁场仿真分析该结构在密封间隙内与极齿处的磁场分布，结合磁性液体密封理论耐压公式对比分析密封间隙与永磁体矫顽力对该结构耐压能力的影响。结果表明：分瓣式交错对齿型磁性液体密封结构具有良好的聚磁效果，相较于传统磁性液体密封结构在单位轴向密封长度下拥有更强的密封性能，理论耐压提高了72%;该结构的耐压能力随着永磁体矫顽力的增加而增加，随密封间隙的增加而下降，当矫顽力从860 kA/m增大到1 060 kA/m时，耐压能力增加了110%。更多还原

【Abstract】 To address the issues of magnetic liquid loss caused by centrifugal force during high-speed sealing and the decline in sealing performance due to magnetic liquid loss during pressure transmission, a split staggered pair teeth magnetic liquid seal structure was designed.Through finite element magnetic field simulation, the magnetic field distribution within the sealing gap and at the pole teeth of this structure was analyzed.Combined with the theoretical pressure resistance formula of magnetic liquid seals, the effects of the sealing gap and the coercivity of permanent magnets on the pressure resistance capability of the structure were comparatively analyzed.The results indicate that the split staggered pair teeth magnetic liquid seal structure exhibits excellent magnetic focusing effects, offering superior sealing performance per unit axial sealing length compared to traditional magnetic liquid seal structures, with a theoretical pressure resistance increase of 72%.The pressure resistance capability of this structure increases with the enhancement of the coercivity of permanent magnets and decreases with the enlargement of the sealing clearance.Specifically, when the coercivity increases from 860 kA/m to 1 060 kA/m, the pressure resistance capability increases by 110%.更多还原