磁流体密封技术在基于超导线圈真空热处理装备中的研究进展

Research Status of MHD Sealing Technology in Vacuum Heat Treatment Equipment Based on Superconducting Coils

磁流体密封具有无摩擦、无污染、寿命长等优势,在真空密封方面具有广阔的应用前景。结合工程应用实际,本文简述了磁流体密封技术的原理、特点,国内外磁流体密封技术研究现状及产品和磁流体密封在真空装备中的应用情况,介绍了超导线圈热处理装备和工艺发展现状以及现有磁流体密封结构在超导线圈密封中存在的缺陷,并提出了一种基于超导线圈的真空热处理装备用水冷磁流体密封装置,该装置可以达到无间隙密封,只需足够的冷却水即可保证热平衡,能有效降低成本。

Magnetic fluid sealing technology has natural advantages such as no friction,no pollution and long life,it has broad application prospects in vacuum sealing.Combining with the practical engineering application,the principle and characteristics of magnetic fluid seal,the research status and products of MHD sealing technology at home and abroad,and the application of magnetic fluid sealing in vacuum equipment are described.The development status of the heat treatment equipment and technology of superconducting coils and the defects of existing magnetic fluid sealing structures in the sealing of superconducting coils vacuum heat treatment furnace are introduced,and a new type of water-cooled magnetic fluid sealing device for vacuum heat treatment furnace was proposed.This device can achieve gapless sealing and only enough cooling water is needed to ensure thermal balance,which can effectively reduce the cost.