1.前言我矿提煤主井5m单绳提升机,设计箕斗提升重量6t。后来,因产量逐年增加,箕斗改装为7.5t,同时把原设计使用的φ43.5mm钢丝绳改用φ46mm作主绳。这样,该提升机卷筒多年来经常在满负荷或超负荷下运行。后来,在运行中发现有“咔—咔”混杂响声。钢板卷筒和筒壳内的加强环和支撑板都有损坏,多处不同程度的开裂。开始,在年度大修中,采用普通焊接法焊接后,继续使用,运转不久还是开裂。 2.修复新工艺最近几年,在每年季节大修时,采用碳弧气 1. Foreword Mine coal mine shaft 5m single rope hoist, design skip to enhance the weight of 6t. Later, due to the increase of output year by year, Skip conversion was 7.5t, while the original design of the φ43.5mm wire rope switch to φ46mm as the main rope. In this way, the hoist reel has been operating at full capacity or over capacity for many years. Later, found in the operation of “carbazole - carbazole” noise mixed. Reinforcing rings and supporting plates in the steel drum and shell are damaged and cracked to varying degrees. Beginning, in the annual overhaul, using ordinary welding method of welding, continue to use, running or cracking soon. 2. Repair the new process In recent years, the annual season overhaul, the use of carbon arc gas