大型发电机定子槽楔松动压力检测法  

Pressure Detection Method for Stator Slot Wedge Loosening of Large Generator

作　　者：李星念 陈志波[1] 王建涛 窦普[1] 陈威 肖鸿坤 LI Xingnian;CHEN Zhibo;WANG Jiantao;DOU Pu;CHEN Wei;XIAO Hongkun(Institute of Optoelectronic Technology,Chinese Academy of Sciences,Chengdu,Sichuan 610209,China;China Nuclear Power Operations Co.,Ltd.,Shenzhen,Guangdong 518124,China)

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]中广核核电运营有限公司,广东深圳518124

出　　处：《广东电力》2024年第11期102-108,共7页Guangdong Electric Power

基　　金：国家重点研发计划项目(2020YFB1709700)。

摘　　要：对于使用波纹板固定的发电机定子槽楔松动问题,目前常见的检测方法过于依赖检测人员经验和电子设备,给检测结果带来了人员操作上的误差,为此提出针对槽楔松动的压力检测法。使用电子万能试验机对2块波纹板叠加组成的试样进行压缩试验,将所得载荷位移曲线通过液压缸面积换算得到压强位移曲线,根据曲线得出判断槽楔松紧度的临界值,得出:对待测槽楔加压至16 MPa,槽楔径向移动值在0.01~1.00 mm为合格,此时波纹板处于压缩状态;槽楔径向移动位移大于1.00 mm为不合格,此时波纹板与槽楔或导体线棒之间存在间隙。建立波纹板槽楔结构模拟体,对不同压缩状态下的波纹板槽楔结构,使用敲击法、模拟仿真以及IRIS Power公司开发的槽楔松紧检测仪对压力检测法进行验证。不同检测方法的结果一致性较高,证明了压力检测法检测槽楔松紧度的可适用性和准确性。Regarding the issue of loosening of stator slot wedges fixed by corrugated plates in generators,the current common detection methods rely too much on the experience of detection personnel and electronic equipment,which brings errors in personnel operation to the detection results.For this reason,this paper proposes the pressure detection method for slot wedge loosening.The compression test was completed using an electronic universal testing machine on a specimen composed of two corrugated plates superimposed.The obtained load displacement curve was converted into a pressure displacement curve through hydraulic cylinder area conversion,and the critical value for judging the tightness of slot wedge was obtained through the curve.Finally,it is concluded that the measured slot wedge is pressurized to 16 MPa,when the radial movement value of the slot wedge is 0.01~1.00 mm,it is qualified,and the corrugated plate is in a compressed state.If the radial displacement of the slot wedge is greater than 1.00 mm,it is unqualified,there is a gap between the corrugated plate and the slot wedge or the conductor rod in this case.A simulation body of the slot wedge structure of the corrugated plate was then established,and the corrugated plate groove-wedge structure under different compression conditions was verified by tapping method,simulation and the slot wedge tightness detector developed by IRIS Power company.Different methods are used to verify the results,and the obtained consistency is high,which proves the applicability and accuracy of the method to detect the tightness of the slot wedge.

关 键 词：波纹板结构 槽楔松动 压力检测法 形变量 紧固程度 

分 类 号：TM307[电气工程—电机]