Key points are not available for this paper at this time.
The magnetic fluid seal (MFS) is a novel sealing technique that offers numerous benefits such as non-wear, long life, zero leakage, etc. There are numerous potential applications for it in the fields of energy and chemical industry, aerospace, machinery and electricity, etc. However, compared with a mechanical seal, the pressure of MFS is relatively low, which greatly limits its application promotion. Therefore, in this paper, a magnetic fluid sealing device with a dual magnetic source (present MFS) is firstly designed to improve the sealing pressure. Secondly, the effects of different sealing gaps, pole tooth heights, pole tooth angles and pole tooth eccentricity distances on the sealing pressure are investigated through numerical simulations to obtain the better combination of structural parameters for sealing performance. Finally, a test rig was built to confirm the reliability of the new device, and the results show that the new device’s sealing pressure is significantly higher than the conventional MFS’ at the same rate of rotation, with a maximum increase of 1.69 times and 1.71 times in sealing gas and liquid, respectively. This paper provides a reference for the improvement of sealing pressure of MFS in engineering applications.
Qing et al. (Tue,) studied this question.