采用超声相控阵技术检测汽轮机转子叉型叶根

汽轮机叶片作为火力发电厂金属监督检验的重要部件,其叉型叶根结构复杂且检测面狭小,常规检测方法难以实现不拆除检测。笔者采用超声相控阵检测技术,制作了专用超声相控阵换能器来控制换能器各阵元的聚焦、扫查,对获得的数据进行软件分析并制定检测方案,从而实现了对叉型叶根的二维成像检测。利用该检测技术能快速、直观、有效地检测出裂纹缺陷,为确保汽轮机安全运行,防止叶片断裂提供了有力保障。

Ultrasonic Phased Array Test of Steam Turbine Fork Type Blade Root

The Stream turbine is the essential equipment under metal supervision and test in power plant.The fork type blade root on service is complex and its surface for defection is narrow,so it is difficult without dismantling in routine test.By adopting the ultrasonic phased array testing technology and preparing the special ultrasonic phased array transducer,a detection scheme was developed through software analysis of the data received from transducer array elements for focusing and scanning,two-dimensional imaging detection was realized for the fork type blade root.By this scheme,the crack defect could be detected quickly,directly and effectively,ensuring the safe operation of steam turbine through preventing blade fracture.