摘要
大型回转机械设备运行过程中由于负荷变化引起轴系振动变化现象极为常见,异常振动往往由负荷变化引起的轴承-转子系统传递扭矩、热状态等工况的变化激发。将负荷激振机理与三维全息谱技术相结合,充分运用三维全息谱表述的轴系振动信息,识别不同故障的三维全息谱特征,为识别负荷激发的振动故障提供了新方法。对热弯曲故障与标高故障进行了机理和三维全息谱特征分析,现场数据验证结果表明,通过机理分析得出的三维全息谱特征对负荷引起的振动故障具有良好的识别能力。
It is extremely common for a large-sized rotary machine to undergo a vibration change of its shafting resulting from a load variation during its operation.An abnormal vibration is often triggered by a change of such operating conditions as the transfer torque and thermal state,etc.of a bearing-rotor system experiencing load variations.The authors have combined the load-induced vibration mechanism with three-dimensional holographic spectrum technology and fully utilized the shafting vibration information indicated by a three-dimensional holographic spectrum to identify the three-dimensional holographic spectrum characteristics of different faults,thus providing a new approach for discriminating load-induced vibration faults.The mechanism and three-dimensional holographic spectrum characteristics of a thermal bending and elevation fault have been analyzed.The verification results obtained from on-site data show that the spectrum characteristics in question resulting from a mechanism analysis enjoy a good ability to identify load-induced vibration faults.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2008年第5期462-467,共6页
Journal of Engineering for Thermal Energy and Power
基金
国家863计划(2006AA042429)
国家自然科学基金资助项目(50475084)
关键词
全息谱
振动
热弯曲
标高
负荷
holographic spectrum,vibration,thermal bending,elevation,load
