Influence of temperature on the sealing mechanism and sealing performance for magnetic fluid seal with opposite pole teeth in different environments

Abstract

To investigate the influence of temperature on the pressure transfer mechanism and failure mechanism for magnetic fluid seal (MFS) with opposite pole teeth (OPT), a sealing device with water circulation channel was designed. Sealing mechanism and performance of the sealing device at different temperatures were experimentally investigated under gas and vacuum environments, respectively, and comparison with the experimental results at normal temperature. Theoretical pressure resistance was calculated according to the theoretical pressure resistance formula for MFS with temperature coefficient. The results show that temperature affects the trend of pressure difference variation for the MFS-OPT. As temperature decreases, self-stability of the magnetic fluid film improves, while pressure resistance and self-healing capability of the MFS-OPT become more pronounced.