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Xiaolong Yang,Yuting Liu,Ruibo Zhang,Shanghan Gao 한국자기학회 2021 Journal of Magnetics Vol.26 No.4
To improve the self-repairing capability of common magnetic fluid seal structures after rupture due to excessive differential pressure in small clearance conditions and to verify the superiority of diverging stepped magnetic fluid seals, a diverging stepped magnetic fluid seal device with single magnetic source was tested. The effect of injection volume, clearance and numbers of teeth on the self-repairing performance of a diverging stepped magnetic fluid seals was investigated experimentally and compared with a common magnetic fluid seal. The experimental results indicate that the self-repairing performance of one stepped magnetic fluid seal device is better. The repair rate of a diverging stepped magnetic fluid seal structure decreases first and then increases with the increase of injection volume, and a minimum value is reached near the saturation value. The smaller the sealing gap and the fewer the number of bore teeth, the higher the repair rate of this structure.