牙轮钻几种常见故障的排除ＫＹ──２５０牙轮钻是露天矿常用的穿孔设备，常有故障发生。结合我矿使用情况介绍几种常见故障的处理方法。ｌｏｐ电动机的速度上不去原因在于；（１）给定控制绕组的顺序接反。其控制绕组接法应为串联顺接，如果接反。其控制电流方向改变，输... Exclusion of several common fault roller cone drill KY ─ ─ 250 cone drill is commonly used in open-pit mining perforation equipment, often failure. Combined with mine usage describes the treatment of several common faults. The reason why the speed of the lop motor does not go up is that: (1) the order of the given control windings is reversed. The control winding connection should be connected in series, if reversed. Its control current direction change, lose ...