汽轮机低压缸隔板裂纹的补焊修复措施

华电技术 ›› 2012, Vol. 34 ›› Issue (1): 41-42.

汽轮机低压缸隔板裂纹的补焊修复措施

杨占君1，王丽朋2

1.甘肃电力科学研究院，甘肃兰州730050； 2.兰州西固热电有限责任公司，甘肃兰州730060

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-01-25 发布日期:2012-01-25

Repair welding measures of cracks on diaphragm of steam turbine lowpressure cylinder

YANG Zhanjun1, WANG Lipeng2

1.Gansu Electric Power Research Institute, Lanzhou 730050, China; 2.Lanzhou Xigu Cogeneration Power Company Limited, Lanzhou 730060, China

Received:1900-01-01 Revised:1900-01-01 Online:2012-01-25 Published:2012-01-25

摘要/Abstract

摘要： 某电厂 #2汽轮机在大修时发现，低压缸第6级隔板存在1条长约35mm的表面裂纹，直接影响了机组的安全运行。对隔板材料进行综合分析后，决定采用冷焊法对该缺陷进行挖磨和补焊。介绍了补焊工艺、准备工作、防范措施及检验手段。隔板补焊后经过一个大修周期的运行，补焊部位未出现新的缺陷，证明采用该补焊工艺完全能够保证补焊后的隔板安全运行。

关键词: 汽轮机, 隔板, 裂纹, 灰口铸铁, 冷补焊, 安全运行

Abstract: During overhaul of steam turbine No.2 of a power plant, it was found that there is an about 35mm surface crack in sixth stage diaphragm of the lowpressure cylinder, which influences on unit safe operation directly. According to comprehensive analysis of the material of the diaphragm, it was decided to repair the defect by dig grinding and patch weld, and to adopt the cold welding method for the patch weld. The patch weld process, the preparing work, the preventive measures and the inspect method were introduced. The repaired diaphragm had operated for an overhaul period, and there was not new defect occurred in the patch welded position. This shows that the patch weld technology can ensure safe operation of the repaired diaphragm completely.

Key words: steam turbine, diaphragm, crack, grey cast iron, cold repair welding, safe operation

杨占君;王丽朋. 汽轮机低压缸隔板裂纹的补焊修复措施[J]. 华电技术, 2012, 34(1): 41-42.

YANG Zhanjun;WANG Lipeng. Repair welding measures of cracks on diaphragm of steam turbine lowpressure cylinder[J]. Huadian Technology, 2012, 34(1): 41-42.

[1]	邓辉. 高温再热器出口联箱管座角焊缝开裂原因分析[J]. 华电技术, 2019, 41(8): 74-77.
[2]	陈啸，徐威，刘利，陈鑫. 某600MW机组汽轮机异常振动的分析及处理[J]. 华电技术, 2019, 41(7): 64-66.
[3]	贤建伟，代术建. 300MW亚临界汽轮机快速结垢原因分析及处理[J]. 华电技术, 2019, 41(5): 78-.80.
[4]	张大佳，杨鹏. 6F.01燃气轮机液压油系统调试故障分析及处理[J]. 华电技术, 2019, 41(3): 29-31.
[5]	王敏1，王杰2. 600MW超临界机组凝汽器真空度低的原因分析及治理[J]. 华电技术, 2019, 41(3): 59-61.
[6]	侯家绪，周书康，李艳军. 某电厂低压转子末二级叶片开裂原因分析[J]. 华电技术, 2019, 41(2): 28-31.
[7]	宋馨. 汽轮机轴封蒸汽温度波动原因分析与解决方案[J]. 华电技术, 2019, 41(2): 46-48.
[8]	王治辉，宋志强，王钢锋，于泳. 铜川照金电厂汽轮机汽流激振的原因分析及处理[J]. 华电技术, 2019, 41(2): 46-48.
[9]	马仁婷. 全容量给水泵汽轮机保护系统可靠性分析及优化措施[J]. 华电技术, 2019, 41(10): 60-63.
[10]	罗云，薛荣波，晁俊凯，任海彬，贺学军. 660MW间接空冷机组小汽轮机改造[J]. 华电技术, 2019, 41(10): 76-80.
[11]	刘冠军. 东汽X300P型汽轮机轴向间隙计算及胀差大原因分析[J]. 华电技术, 2019, 41(1): 40-44.
[12]	于淑慧. 高背压供热改造中给水泵汽轮机控制方式研究[J]. 华电技术, 2019, 41(1): 64-66.
[13]	冯光明. 除氧器进汽逆止阀失效暗藏机组跳闸风险[J]. 华电技术, 2019, 41(1): 72-73.
[14]	刘强. 汽轮机安全监视系统设备存在的问题及防范措施[J]. 华电技术, 2018, 40(9): 30-31.
[15]	虞涌. 600MW汽轮机全实缸汽封间隙调整工艺[J]. 华电技术, 2018, 40(9): 44-46.