前言 1132型的l69叶片,在汽轮机上使用很广,其事故率也高。华厂四台汽轮机上装有八级,共计976片。其中东汽厂两台N75—90机各装一级,北重厂两台N100—90机各装三级。从一九七九年开始,我们花了四年时间,将八级169叶片全部加以改造。一、改前状况从一九七九年三月#~1机首次大修开始,我们先后发现有四级169叶片发生不同程度的损伤(事故率达50％)。其中,有47片铆头裂、断或围带甩脱,并有3片叶片的外包小 Foreword 1169-type l69 leaves, the turbine is widely used, the accident rate is high. China Factory four turbines with eight, a total of 976. One East Motor Factory two N75-90 each equipped with a North Heavy Factory two N100-90 each equipped with three. From 1979 onwards, we spent four years transforming all eight levels of 169 leaves. First, the situation before the change From March 1979 # 1 machine first overhaul began, we have found 169 levels of four different degrees of damage (accident rate of 50%). Among them, there are 47 rivets split, off or shroud rejection, and a small outsourcing of three leaves