离心式烟道风机轴承箱密封结构改造

Transformation of sealing structure of bearing box of centrifugal flue fan

分析了某离心式烟道风机频繁发生泄漏的原因,指出了填料式密封寿命短、易泄漏、磨轴、外界污染物入侵轴承箱等缺点。提出使用金属迷宫式轴承保护器进行密封改造,避免了原填料密封因预紧力施加不均衡造成的密封泄漏,在实际生产中取得了良好效果。

This paper analyzed the causes for frequent leakage of centrifugal flue fan, pointed out the defects such as short life, easy leak, grinding shaft and invasion by external pollutants. It proposed to use metallic labyrinth bearing protector to make seal innovation, and these avoided seal leakage caused by imbalance of pre-tightening force by the original packing seal, and obtained good result during actual production.