颚式破碎机因使用不当或检修不及时，常常会出现皮带轧或飞轮与偏心轴滚键，使皮带轮、飞轴内孔受损而报废。由于此类件为铸铁类，采用补焊方法不但造价高，而且也容易出现裂纹，使修复失败。我们在实践中总结出了一套简易稳妥的方法，即：扩内孔、镶过盈套及打定位螺钉。扩内 Jaw crusher due to improper use or maintenance is not timely, often there will be belt rolling or flywheel and eccentric shaft rolling key, the pulley, the shaft bore damage and scrapped. Because of this type of cast iron, the use of welding method not only high cost, but also prone to cracks, so that repair failed. In practice, we summed up a simple and secure method, namely: expansion of the hole, set over the sleeve and set the set screws. Expand within