水轮机转轮叶片裂纹实时在线检测研究  

Study on Real-time and Online Detection of the Cracks of Turbine Runner Blade

作　　者：单宁[1] 刘霞[2] 

机构地区：[1]武警工程学院装备运输系,陕西西安710086 [2]西北工业大学机电学院,陕西西安710072

出　　处：《压电与声光》2011年第5期714-716,共3页Piezoelectrics & Acoustooptics

基　　金：武警工程学院基础研究基金资助项目(WJY201032)

摘　　要：水轮机转轮叶片长期工作在恶劣环境下,易产生疲劳裂纹,导致重大事故发生。该文设计一非本征型光纤法布里-珀罗(F-P)干涉腔结构,研究了F-P腔的光学干涉模型,设计了F-P腔的初始腔长,并基于光纤声发射传感技术建立了水轮机转轮叶片裂纹实时在线检测系统,进行实验研究。结果表明,该系统能有效实现水轮机转轮叶片的实时在线检测,操作简单,实现容易,成本低,易于工程实用化。Since the turbine runner blade works in the badly conditions long time, the fatigue cracks can be caused and can lead to the serious accident. The structure of the extrinsic optical fiber Fabry-Perot （F-P） interferL ence cavity has been designed in this paper. The optical interference model of F-P cavity was studied. The original length of F-P cavity has been designed. A real-time and online detection system of the cracks of the turbine runner blade was fabricated by using the optical fiber acoustic emission sensing technology and the experiment study has been carried out. The results showed that the system could realize the real time and online detection of the cracks of the turbine runner blade efficiently. The proposed system has the features of easy-to-operate, low cost, simple to fabricate and easy-to-engineering applications.

关 键 词：水轮机 转轮叶片 光纤 声发射技术 裂纹 

分 类 号：TG115[金属学及工艺—物理冶金]