哈尔滨汽轮机厂生产的5万、10万、20万瓩汽轮机均采用了苏联设计的169mm动叶片。运行中曾多次地出现围带飞脱、叶片铆钉头断裂,个别叶片断裂和叶根外包小角裂纹等事故。本文针对上述事故情况予以分析并指出该叶片的改进措施。一、叶片的事故情况苏联设计的169mm叶片,在国内和国外使用的范围很广,有14种机型,27个级别。在我国使用情况如下: Harbin Turbine Factory production of 50,000, 100,000, 200,000 瓩 steam turbine are used in the Soviet Union designed 169mm rotor blades. Occurred several times during operation, such as troublesome circumcision, rupture of blade rivet heads, breakage of individual leaves and small-angle crack in root outsourcing. This paper analyzes the above accidents and points out the improvement measures of the blade. First, the accidental situation of the leaves 169mm blades designed by the Soviet Union, a wide range of domestic and foreign use, there are 14 kinds of models, 27 levels. The usage in our country is as follows: