从1992年4月份以来,我段先后发生4起东风,型机车风扇偶合器泵轮、涡轮叶片严重破损毁坏的扫膛故障,造成临修4件,机车停时50h,影响了我段正常的运输任务.1故障现象 (l)东风了型220号机车于1991年g月出厂,1992年9月1日乘务员预报中冷风扇有异音。回段拆检滤清器,网罩有铝屑。分解偶合器,泵、涡轮叶片严重破损,传动 Since April 1992, there have been 4 wind turbine locomotive fan coupling pump wheels and serious damage to the swell failure caused by serious damage to the turbine blades, resulting in 4 temporary repairs. The locomotive stopped for 50 hours and affected my normal section Transport mission .1 Fault phenomenon (l) Dongfeng 220 locomotive factory in 1991 1991, forecasters in September 1, 1992 forecast abnormal cooling fan fan. Back to dismantle the filter, net cover aluminum scrap. Decomposition couplings, pumps, turbine blades severely damaged, drive