收修回稿日期:2003 07 111　问题的提出　　涡轮增压器内部结构精密,工作环境较为恶劣,而且工作时转速极高,是机车的易损部件。我们段每年都因增压器故障而造成多起机破和临修,尤其是增压器的大破损造成了很大的经济损失和恶性事故。2　统计分析　　我们段配属DF4B型机车62 Remedy Received: 2003 07 111 The problem Turbocharger internal structure of the sophisticated, more harsh working conditions, but also work at high speed, the locomotive is a vulnerable component. Every year, our section of turbocharger caused more machine breakage and temporary repair due to turbocharger failure. In particular, the great damage to the turbocharger caused great economic losses and serious accidents. 2 Statistical Analysis Our section is equipped with DF4B locomotive 62