Numerical and experimental study of the ultimate pressure and self-repairing capability of diverging magnetic fluid seal with stepped pole pieces

Abstract

Abstract With the objective of enhancing the performance of magnetic fluid seal in scenarios with large clearance, an innovative design of a diverging magnetic fluid seal with stepped pole piece has been developed. In contrast to the ordinary magnetic fluid seal, this new seal has advantages such as simple structure and high ultimate pressure. This study investigated the influence of different sealing gaps, step number and step height on both the ultimate pressure and self-repairing capability of the sealing device. The results indicate that the experimental and theoretical values of the new seals have similar trends, and their ultimate pressure and self-repairing capability are closely related to these parameters. These findings confirm the excellent sealing performance of the sealing device.