论文部分内容阅读
在美国,有许多汽轮机已运行25年或者甚至更长。对这些汽轮机组(包括火电和核电)而言,汽轮机叶片事故特别是低压叶片事故是汽轮机强迫停机的主要原困之一。典型的叶片事故有:①叶片型面的裂纹,②拉金损坏,③围带裂纹或损坏,④叶根裂纹,⑤转子/叶片的附件裂纹,⑥司太立合金片松动等。在汽轮机低压缸最后4级叶片上都产生过上述事故。
In the United States, many turbines have been in operation for 25 years or longer. For these steam turbines (including thermal power and nuclear power), the accident of turbine blades, especially the low-pressure blade, is one of the main problems of forced shutdown of steam turbines. Typical blade accidents are: ① blade surface cracks, ② pull the gold damage, ③ crack or damage the shroud, ④ root leaf cracks, ⑤ rotor / blade attachment cracks, ⑥ Division too Stan alloy loosening. The above-mentioned accident occurred on the last four blades of the turbine LP cylinder.