汽轮机转子缺陷分析和安全性评估

Defect Analysis and Safety Assessment of Turbine Rotor

文章以线弹性断裂力学为基础,结合国内外相关含缺陷转子安全性评估方面的研究,编制了汽轮机转子缺陷评估方法。以某联合循环汽轮机高压转子为例进行安全性评估,结果表明在正常运行工况下,这些缺陷不会引起一次性断裂且缺陷的疲劳裂纹扩展次数远远大于机组要求的寿命次数。

Based on linear elastic fracture mechanics and domestic and foreign research on safety evaluation of defective rotors,a method of turbine rotor defects evaluation is developed in this paper.Taking a high pressure rotor of combined cycle turbine as an example,the safety evaluation results show that these defects will not cause one-time fracture under normal operation conditions and the fatigue crack propagation times of defects are far greater than the required life times of the unit.