WEDGE LOOSENING INSPECTION DEVICE FOR DYNAMO-ELECTRIC MACHINE

• Main Authors: MIZUNO DAISUKE, FUKUSHIMA KAZUHIKO, NAKAMURA KOHEI, MORIMOTO YOSHIHIRO, NAGAYA WATARU
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2019
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

In diagnosis of wedge loosening due to wedge impact in a dynamo-electric machine, there is little change in impact sound waveform with respect to a change in the amount of wedge loosening, and a slight difference in the amount of wedge loosening is difficult to distinguish. The present invention is therefore configured so that the wedge is impacted by an impact part in a state in which the wedge is pressed by a pressing part for pressing the surface of the wedge, and a high-frequency impact sound is reduced, whereby the amount of change in the magnitude of the impact sound with respect to a change in the amount of wedge loosening is increased, and the amount of wedge loosening is determined by the impact sound acquired by an impact sound acquiring part. 在通过旋转电机的楔形件击打进行的楔形件松动诊断中，由于击打音波形相对于楔形件松动量的变化发生的变化较小，很难对楔形件的松动量的微小差异进行判别，因此，在通过对楔形件的表面进行按压的按压部，对楔形件进行了按压的状态下，利用所述击打部对所述楔形件进行击打，并减小高频率的击打音，从而扩大击打音的大小相对于楔形件的松动量的变化发生的变化量，根据通过击打音获取部获取到的击打音，对楔形件松动量进行判断。