我公司有一台美国卡特彼勒950B轮式装载机,在工作中发动机突然发出异响,随后转速下降,排气管冒黑烟。初步判定和拆检,是发动机涡轮增压器叶轮轴断了。进一步检查发现,压气机叶轮前端面叶片有缺损。为防止叶轮碎片进入气缸内,遂将气缸盖打开进行了清理,但没有沿气流相反方向检查进气管和空气滤芯。 装上新增压器后,该机工作了约4h,发动机又出现冒黑烟和无力现象,有时增压器还发出异响声。再次拆检增压器发现,叶轮轴径向间隙明显变大,压气机叶轮前端面叶片有损伤。于是怀疑是进气管内有异物造成。后经清理进气管和拆下 My company has a United States Caterpillar 950B wheel loader, the engine suddenly issued a strange sound at work, then the speed decreased, the exhaust pipe black smoke. Preliminary determination and dismantling, the engine turbocharger impeller shaft is broken. Further examination revealed that there was a defect in the blade at the front of the compressor impeller. To prevent impeller debris from entering the cylinder, the cylinder head was opened for cleaning, but the intake and air filters were not checked in the opposite direction of the airflow. Installed on the new supercharger, the aircraft worked for about 4h, the engine appeared black smoke and weakness, and sometimes the supercharger also issued a different sound. Check again supercharger found that the impeller shaft clearance significantly larger, the front of the impeller impeller blade damage. So it is suspected that there is a foreign body into the trachea. After cleaning the intake pipe and removed