Studies of Magnetic Fluid Plane Sealing in Split Sealing Device

doi:10.3901/JME.2018.05.149

Abstract

Abstract: Changing pole shoe in the experiment, assembling and using of the existing split sealing device increased the cost and reduced the efficiency. To solve this problem, a split magnetic liquid sealing structure that combines magnetic liquid rotary sealing with magnetic fluid plane sealing is designed. Based on Kirchhoff's first law and the theory of Ohm's law of magnetic circuit, magnetic liquid plane sealing pressure performance theory is deduced. According to different seal gap and different pole shoe teeth width, a simulated calculation is conducted to get the magnetic field strength in the gap of plane sealing structure, using finite element method. The results show that this structure has good sealing ability. Seal gap and tooth width are the key parameters that affect the sealing performance, and the larger the sealing gap, the more serious magnetic leakage phenomenon, the lower the sealing performance. The sealing performance is the best when the tooth width is 0.4 mm, and is very low when the tooth width is over 1.6 mm. The theoretical analysis and simulation results provide reference for performance evaluation of different sealing devices and prediction of interfacial failure critical pressure.

Key words: finite element, plane sealing, sealing performance, split magnetic liquid sealing, structure parameter

CLC Number:

TH136

ZHANG Huitao, LI Decai. Studies of Magnetic Fluid Plane Sealing in Split Sealing Device[J]. Journal of Mechanical Engineering, 2018, 54(5): 149-155.

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