磁性液体密封与迷宫密封组合密封的结构设计及优化

Design and Optimization of Combined Magnetic Fluid Seal and Labyrinth Seal

目前,磁性液体密封作为一种新型密封方式,具有零泄漏、无污染、寿命长等优点,但存在着耐温差和耐压差能力相对较弱,高速工况下容易失效的问题。而迷宫密封作为传统密封方式,具有泄漏量大的缺点,但适用于高温、高压和高速的工况,可以很好地弥补磁性液体密封的缺点。因此,设计了磁性液体密封与迷宫密封组合密封的结构,对极靴和轴套的结构尺寸进行正交试验和响应曲面法优化,得到了使组合密封结构耐压值最大的结构尺寸,为高温、高压、高速工况实现零泄漏密封提供了理论基础。

At present,as a new sealing method,magnetic fluid seal has the advantages of zero leakage,no pollution and long life,but it is relatively weak when the temperature or pressure is high and it is easy to fail under high-speed working conditions.As a traditional sealing method,labyrinth seal has the disadvantage of large leakage,but it is suitable for high-temperature,high-pressure and high-speed working conditions,so it can make up for the shortcomings of magnetic fluid seal well.Therefore,the combined seal structure of magnetic fluid seal and labyrinth seal is designed,and the structural size of pole shoe and shaft sleeve is optimized by orthogonal test and response surface method.The structural size that could maximize the pressure resistance value of the combined seal is obtained,which may provide a theoretical basis for zero-leakage sealing under high-temperature,high-pressure and high-speed conditions.