某82MW空冷汽轮发电机转子槽底垫条移位故障原因分析及处理  

Causal Analysis and Treatment of Rotor Bottom Spacer Bar Displacement Fault of a Certain 82 MW Air-cooled Turbo-generator

作　　者：侯中峰 王晖 茹芬 王家驹 谢玮 刘瞻 任民 唐琪川 HOU Zhongfeng;WANG Hui;RU Fen;WANG Jiaju;XIE Wei;LIU Zhan;REN Min;TANG Qichuan(Xi′an Thermal Power Research Institute Co.,Ltd.,Xi′an 710054,China;China Huaneng Tongxiang Gas-Turbine Thermal Power Co.,Ltd.,Jiaxing 314513,China;AVIC Xi′an Aviation Brake Technology Co.,Ltd.,Xi′an 710065,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]华能桐乡燃机热电有限责任公司,浙江嘉兴314513 [3]航空工业西安航空制动科技有限公司,陕西西安710065

出　　处：《电工技术》2023年第21期190-193,共4页Electric Engineering

摘　　要：我国汽轮发电机制造经过近30年发展,虽然制造质量及运维水平有相当程度的提升,但一些新的情况逐渐凸显,如火电机组频繁调峰运行、老旧机组接近服役时间。受上述两项为代表的因素的影响,越来越多的发电机隐蔽性缺陷逐渐显现出来,且有增多趋势,因此有必要进一步收集信息,梳理问题,以提高发电机设备的可靠性。研究了一起频繁调峰运行机组的82 MW空冷汽轮发电机转子槽底垫条多处移位故障,结合现场故障检查及返厂检查情况进行了原因分析。处理故障时,为限制槽底垫条移位,在转子每槽底匝导线出槽口位置焊接铜挡块,以阻挡槽底垫条及槽衬在槽内窜动,为发电机安全运行提供保障。After nearly 30 years of development,the manufacturing quality and operation and maintenance level of turbo-generators in China have been elevated to a considerable extent,but some new situations have gradually become prominent.For example,the thermal power units operate frequently in peak load regulation,and old units are close to its service time ultimate.Affected by the above two factors,more and more hidden defects of generators have gradually emerged and exhibited an increasing trend.Therefore it is necessary to further collect information and sort out problems to improve the reliability of generator equipment.This paper mainly studied the multiple displacement faults of the rotor slot bottom spacer bar of a certain 82 MW air-cooled turbo-generator with frequent peak load operation,and the fault cause was analyzed based on field fault inspection and factory inspection.In order to limit the displacement of the spacer bar at the bottom of the slot,the copper block was welded at the slot outlet of the bottom turn wire of each rotor slot to prevent the bottom spacer bar and slot insulation from shifting in the slot,providing guarantee for safe operation of the generator.

关 键 词：发电机转子 槽底垫条 移位 

分 类 号：TM31[电气工程—电机]