Ultrasonic detection device for cracks of direct-drive wind driven generator spindle

The ultrasonic detection device for cracks of a direct-drive wind driven generator spindleis characterized by comprising more than one row of ultrasonic probes (1), and the ultrasonic probes (1) are arranged in a spindle (2). The ultrasonic probe is installed in the spindle, generated waves are transmitted into the spindle, whether the spindle generates cracks or not is analyzed according to ultrasonic waveforms, the crack growth condition of the stress concentration part of the spindle is monitored in real time, and spindle faults can be found as soon as possible. The ultrasonic probes are arranged in a multi-row fan-shaped manner, so that the detection sensitivity can be improved. Therefore, ultrasonic detection can be carried out on the interior with stress concentration of the spindle,and the detection effect is better. 一种用于直驱式风力发电机主轴裂纹超声检测装置，其特征在于：包括1排以上的超声波探头（1），超声波探头（1）设置在主轴（2）内部。本发明将超声波探头安装在主轴内部，所产生的波向主轴内部传播，根据超声波波形分析主轴是否产生裂纹，实时监测主轴应力集中部位裂纹生长情况，能够及早发现主轴故障。超声波探头设计为多排扇形排列，能够提升检测灵敏度。因此本发明能够针对主轴应力集中的内部进行超