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为了对综放面几何形状相对复杂的大型机电设备及其组件进行精准探伤,基于综放支架进行无损检测的必要性,提出一维线性超声相控阵无损检测技术。以ZFG10000/23/37H型综放支架活柱探伤为依据,研究了相控聚焦和相控延时接收的基本原理,并结合单一阵元的归一化声压函数,分析正弦增益加权变迹技术在降低旁瓣对输出波形清晰度影响方面的重要意义。最后以五家沟煤矿5201综放面焊缝开裂的掩护梁探伤为实践,阐述超声相控阵无损检测技术的构成和检测工艺。实例应用表明:一维线性超声相控阵无损探伤技术能够对掩护梁内部微裂隙和表面贯通裂隙进行精准的定位和定量,并能够根据三维图像输出结果准确判定裂隙的发展方向和贯通趋势。
In order to carry out precise flaw detection on the large mechanical and electrical equipment with complex geometric shapes and its components, a one-dimensional linear ultrasonic phased array non-destructive testing technique based on the necessity of non-destructive testing of fully mechanized top-coal caving support was proposed. Based on the test of ZXFG10000 / 23 / 37H fully mechanized top-coal caving support, the basic principle of phase-controlled focusing and phase-controlled delay receiving is studied. Combined with the normalized sound pressure function of single element, The importance of technology in reducing the influence of side lobes on the output waveform sharpness. At last, the testing of the protective beam of the weld cracking in the 5201 fully mechanized caving mining face in Wujiagou coal mine is practiced. The composition and testing technology of the non-destructive testing technology of ultrasonic phased array are expounded. The application of the example shows that the one-dimensional linear phased array non-destructive flaw detection technology can accurately locate and quantify the micro-cracks and the surface through-fractures in the shield beams and can accurately determine the development direction and penetration trend of the fractures according to the output results of the three-dimensional images.