Abstract

Magnetic fluid is used for sealing because of its strong magnetic response. However, magnetic particles are aggregated at the pole tooth in the nonuniform magnetic field, which results in a change in sealing performance. This paper uses the coupling simulation of the magnetic-flow field and the diffusion equation to solve the magnetic particle concentration distribution with the different rotating speeds. The sealing performance of different magnetic particle concentration distributions is calculated using the multi-physical field coupling and the dynamic mesh method. The results show that the particle concentration inhomogeneity degree is influenced by rotating speed, particle size, and volume fractions. Besides, the increasing particle concentration inhomogeneity degree increases the sealing performance.

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