某型燃气轮机低压压气机六级后集气腔裂纹故障原因分析及改进措施
Fault Analysis and Improvement Measures for Cracks in the Gas Gathering Chamber of a Gas Turbine's Low Pressure Compressor Sixth Stage Rear
马建强 1张澄源 1王振坤 1马正军1
作者信息
- 1. 中国船舶集团有限公司第七○三研究所,黑龙江哈尔滨 150078;船舶与海洋工程特种装备和动力系统国家工程研究中心,黑龙江哈尔滨 150078
- 折叠
摘要
针对某型燃气轮机低压压气机六级后集气腔裂纹故障,分别进行生产过程检查、焊缝检查及安装应力、焊接残余应力、热应力及振动应力分析.综合分析结果表明:低压六级后集气腔裂纹故障的主要原因为高压压气机前卸荷腔向低压六级放气的管路与机组发生共振,在共振应力和热应力共同作用下产生高周疲劳,最终导致距离法兰较近的焊缝位置发生开裂;放气管经改型和放置支架后,消除了因管路共振产生的疲劳应力,故障得以排除,截至目前,机组已安全运行约1 500 h.
Abstract
Regarding the cracks failure in a gas turbine's low pressure compressor sixth stage rear gas gathering chamber,production process inspection,weld inspection and analyses of installation stress,welding residual stress,thermal stress and vibration stress were conducted separately.The comprehensive analysis results indicate that the cracks failure in a gas turbine's low pressure sixth stage rear gas gather-ing chamber is caused by resonance from the high pressure compressor front unloading chamber to the low pressure compressor sixth stage vent pipe and the unit,high cycle fatigue occurs under the combined ac-tion of resonance stress and thermal stress,and cracking occurs at the weld seam location closer to the flange.The fatigue stress caused by pipe resonance is eliminated and the fault is eliminated after the re-lief pipe is modified and the support is added.So far,the unit has operated safely for about 1 500 hours.
关键词
燃气轮机/裂纹故障/原因分析/改进措施Key words
gas turbine/crack failure/cause analysis/improvement measures引用本文复制引用
出版年
2024
NETL
NSTL
万方数据