马鞍山钢铁公司二钢厂8吨侧吹转炉,进风管内径Φ400毫米,风压0.9公斤/厘米~2,转速0.6转/分,介质为空气。进风管和旋转轴的耳轴之间,原用填料密封(图1),生产中常因填料磨损或被风吹得一无所剩而造成漏风,被迫停炉重填盘根而影响生产。为此我们设计了一套自封式迷宫密封装置(图2),于1975年安装使用,至今效果良好,寿命很长。 Ma’anshan Iron and Steel Company II steel mill 8 tons side blowing converter, inlet diameter Φ400 mm, wind pressure 0.9 kg / cm ~ 2, speed 0.6 r / min, the medium is air. Into the air duct and the shaft between the trunnion, the original packing seal (Figure 1), production often due to packing wear or was blown by the wind caused by air leakage, was forced to stop re-packing furnace and affect production . To this end, we have designed a self-sealing labyrinth seal (Figure 2), which was installed and used in 1975 and has achieved good results and long service life.