叉型叶根超声相控阵检测技术研究

Research on Ultrasonic Phased Array Applied in Fork Root

依据超声相控阵检测技术的原理,分析相控阵换能器各个参数对超声辐射声场的影响,结合汽轮机叶片叉型叶根的特点,研制了专用超声相控阵检测换能器和楔块。针对叉型叶根结构特点拟定分区扫查方式,实现对叶根检测部位的全覆盖检验,应用超声相控阵成像技术,使检测结果直观,易于判断。

The effects of transducer’s parameters on the radiate ultrasonic sound field were studied by the principle of ultrasonic phased array testing technology.Also,on the account of the character of the steam turbine blade root of fork type,a special set,consisting of a transducer and a wedge,was researched.The fork root’s whole coverage testing can be fulfilled,and the visual results can make the judging easy.