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针对立式真空搅拌器主轴密封在特殊工况下易出现泄漏，而现有密封手段难以有效解决这一问题的现状，设计一种新型的迷宫-磁流体组合式密封装置。采用有限元数值仿真方法，研究密封间隙中的磁场分布规律，得出该装置的理论耐压值为0.375 MPa。运用单因素分析法，探究密封间隙、齿槽宽度、极齿高度及极齿宽度对密封耐压性能的影响，借助响应面优化法对结构参数开展优化设计。研究结果表明：密封耐压值随极齿高度和极齿宽度的增加先增大后减小；随密封间隙增大而减少，随齿槽宽度的增加，先增加后趋于平稳；优化后密封结构参数为密封间隙0.1 mm、极齿高度1.89 mm、极齿宽度1 mm、齿槽宽度3 mm，密封耐压值达到0.555 MPa，远高于实际工况对密封压力的要求，满足密封需求。
Abstract：To address the leakage issues prone to occur in the main shaft seals of vertical vacuum agitators under special operating conditions, and the inadequacy of existing sealing methods in effectively resolving this problem, a novel labyrinth-magnetohydrodynamic composite sealing device has been designed. Using finite element numerical simulation, the magnetic field distribution patterns within the sealing gap were investigated, yielding a theoretical pressure resistance value of 0.375 MPa for this device. Single-factor analysis was employed to investigate the effects of seal clearance, tooth slot width, pole tooth height, and pole tooth width on the seal's pressure resistance. Response surface optimization was then used to refine the structural parameters. Results indicate that the seal's pressure resistance initially increases with greater pole tooth height and width before decreasing;decreases with increasing seal gap; and increases initially then stabilizes with increasing tooth slot width. The optimized seal parameters are: seal gap 0.1 mm, pole tooth height 1.89 mm, pole tooth width 1 mm, and tooth slot width 3 mm. The resulting seal pressure resistance reaches 0.555 MPa, significantly exceeding the operational pressure requirements and meeting sealing demands.
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基本信息:
DOI：10.13922/j.cnki.cjvst.202510009
中图分类号:TB42
引用信息:
[1]李俊超,朱维兵,龙泉行,等.立式真空搅拌器磁流体密封设计及优化[J].真空科学与技术学报,2026,46(03):237-246.DOI:10.13922/j.cnki.cjvst.202510009.
基金信息:
四川省国际港澳台科技创新合作项目（2024YFHZ0338）
2025-12-10
2025-12-10
2025-12-10