两种新型磁流体密封水结构的试验研究

为满足实际应用中对磁流体密封装置轴向尺寸的限制要求,设计了2种新型的磁流体密封结构,即轴向-端面组合结构和轴向内增密封齿结构。对2种密封结构的磁路进行了有限元分析,并通过密封水试验研究了影响轴向-端面组合结构和轴向内增密封齿结构的密封承压能力的一些因素及其影响规律。研究结果表明这2种新型的磁流体密封结构可以明显提高单位体积磁流体密封装置的承压能力;与传统轴向密封结构相比,轴向-端面组合密封结构对离心力更为敏感;随着转速的增加,其承压能力比传统轴向密封结构的承压能力下降更快。

The Experimental Study on Two Kinds of New Structures of Magnetic Fluid Sealing Water

Two kinds of new magnetic fluid sealing structures, the shaft-direction and section-direction combined sealing structure and the shaft-direction gear-adding sealing structure were designed,to meet the limit to the size of sealing equipments in practice.The decisive factors affecting on the pressure tight ability of the two kinds of new sealing structures and their regularities were studied by sealing water experiments,and the magnetic field distribution of the two kinds of new sealing structures was analyzed by ANSYS computation method.The results show that the two kinds of new sealing structures both can improve the pressure tight ability per volume of magnetic fluid sealing devices.Compared with the traditional shaft-direction sealing structure,the shaft-direction and section-direction combined sealing structure is more sensitive,so its pressure tight ability descendes faster than that of the traditional shaft-direction sealing structure with the increase of the rotate speed.