Research on Parameters Optimization of Rectangular Pole Teeth for Magnetic Fluid Seals

Abstract To optimize the magnetic fluid seal design, the single-factor method is usually used to study the effect of the rectangular pole teeth structure parameters on the sealing capacity of the magnetic fluid seal by current research, and the design formula is obtained. However, the supporting data is too few to make the results universalizable. In this paper, to obtain a wider range of applicable design formulas, a large number of modeling and simulation experiments are conducted using the co-simulation analysis experimental method of MATLAB and COMSOL. The influence of structure parameters of rectangular pole teeth and the coupling effects of the structure parameters on the sealing capacity of sealing devices has been studied under different lengths of pole piece (L p ) and seal gap (L g ). The results explain the influences of tooth height (L h ), tooth width (L t ), groove width (L s ), and their coupling effects on the theoretical sealing capacity of magnetic fluid seals, and more widely applicable design formulas for pole teeth structure parameters are given. The design formulas can help to obtain good design parameters directly or reduce the optimization range when the magnetic fluid seals need to be optimized to meet the miniaturization and lightweight requirements of magnetic fluid sealing devices or improve the sealing capacity under the same seal size.