论文部分内容阅读
为了解决大间隙条件下磁性液体密封耐压能力低的难题,本文在阶梯式迷宫密封的基础上创造性地提出了一种新型阶梯式磁性液体密封结构。初步设计了一种聚合型阶梯式磁性液体密封结构和一种与其具有相同结构参数的普通磁性液体密封结构,采用试验的方法研究了两种密封结构的密封耐压性能,并对结果进行了分析与比较。结果表明:当轴向密封间隙宽度为0.4 mm且径向密封间隙宽度从0.4增加到0.7 mm时,聚合型阶梯式机油基磁性液体密封性能较普通磁性液体密封耐压性能分别提高了0%,11%,50%和70%;当径向密封间隙高度为0.7 mm且轴向密封间隙宽度从0.4增加到1 mm时,聚合型阶梯式机油基磁性液体密封性能分别提高了70%,50%,80%和20%。大间隙聚合型阶梯式磁性液体密封的耐压性能不仅取决于径向密封间隙的高度,还取决于轴向密封间隙的宽度。
In order to solve the problem of low pressure resistance of the magnetic liquid seal under large clearance conditions, this paper presents a novel ladder-type magnetic liquid seal structure creatively on the basis of stepped labyrinth seal. A polymeric ladder-type magnetic liquid sealing structure and an ordinary magnetic liquid sealing structure with the same structural parameters were preliminarily designed. The sealing pressure-proof performance of the two sealing structures was studied by the test method, and the results were analyzed Compared with. The results show that when the axial seal gap width is 0.4 mm and the radial seal gap width is increased from 0.4 to 0.7 mm, the polymerized stepped oil-based magnetic liquid sealing performance is improved by 0% over the ordinary magnetic liquid seal respectively, 11%, 50% and 70%, respectively. When the radial seal gap height is 0.7 mm and the axial seal gap width is increased from 0.4 to 1 mm, the polymerized stepped oil-based magnetic liquid sealing performance is improved by 70% and 50% , 80% and 20%. The pressure resistance of large-gap polymeric ladder-type magnetic fluid seals depends not only on the height of the radial seal gap but also on the width of the axial seal gap.