CAJ | 학술논문

针对低速重载回转支承故障检测的难点问题，对一台已服役36年的门座起重机转柱式回转支承进行声发射检测，确定了上支座滚道声发射信号衰减曲线及传感器的安装位置。通过现场试验获得空载、半载和满载4种工况下门座起重机回转支承上支座滚道声发射信号，对幅值、持续时间、能量等典型参数特征和典型定位信号波形频谱特征进行了分析，以期为后续研究工作提供一定指导。
침대저속중재회전지승고장검측적난점문제，대일태이복역36년적문좌기중궤전주식회전지승진행성발사검측，학정료상지좌곤도성발사신호쇠감곡선급전감기적안장위치。통과현장시험획득공재、반재화만재4충공황하문좌기중궤회전지승상지좌곤도성발사신호，대폭치、지속시간、능량등전형삼수특정화전형정위신호파형빈보특정진행료분석，이기위후속연구공작제공일정지도。
In view of difficulties in fault diagnosis of low-speed heavy-load slewing bearing,the acoustic emission tes-ting is performed for the column-type slewing bearing of portal crane in service for 36 years,to determine the decay curve of acoustic emission signal from the upper bracket raceway and installation positions of the sensor.The acoustic emission sig-nals from the upper bracket raceway of slewing bearing of portal crane under the conditions of no-load,half-load,full-load are get by site tests,with further analysis of the typical parameter characteristics and wave spectrum signature of typical po-sitioning signal such as amplitude,duration,energy,etc.,providing certain guidance for successive research.