一种新型组合密封系统的实验研究

 介绍了一种新型组合密封系统——气体螺旋槽与铁磁流体组合密封型式.在分别对这两种密封型式研究基础上,进行了组合密封实验.实验表明,这种密封型式可以达到从零速到设计转速整个范围内均具有所需要的密封能力.在高速旋转密封时,螺旋槽有效地抑制了铁磁流体的飞溅,并在铁磁流体破裂时,使其迅速恢复密封能力.所以该组合密封具有无污染、高可靠性等特点.同时指出,通过调节这两种密封型式的结构设计参数,可以满足不同的密封要求.这些性质是其它非接触式密封所做不到的.

Experimental Study on a New Type of Combined Seal System

A new type of combined seal system with ferromagnetic flow and gas along cylindrical spiral groove is proposed in this paper. Based on the study of the two seals respectively, experiments on the combined seal system are carried out. Results show that the seal system has enough seal ability to fulfil the speed limit from zero to designed value. At high speed, gas seal can prevent the splash of ferromagnetic flow effectively and restore the seal ability when the seal film of ferromagnetic flow breaks up, so it is a pollution free and reliable seal. It is also revealed that the combined seal is characterized by being adapted to diverse seal occasion by adjusting structural design parameters. The performances are beyond the reach of other kind of non contact seals.