摘要
针对某化工厂隔膜压缩机排气管路运行中存在的严重振动问题,对其排气管路建立了气流脉动和振动模态分析模型,进行了管路内脉动激振力和管路结构模态分析。结合现场测试数据,找到了管路振动的原因,并提出了解决方案。对比改造前后管路的振动情况,结果表明:原管道振动严重处,改造后管路内气流脉动引起的最大激振力从343N减小到36N,管路一阶结构固有频率从4.7 Hz提高到了14.7 Hz。改造后实际运行管路振动测试数据显示,管路振动有明显改善,管路最大振动速度从原来的44 mm/s减小到了3.7 mm/s,完全满足安全生产要求,改造效果良好。
In order to attenuate the severe vibration of a diaphragm compressor exhaust pipeline in a chemical plant, the acoustic model of the exhaust flow and the finite element model were built to analyze the pulsation exciting forces and the mechanical natural frequencies, respectively. Based on the simulation results and filed test results, the cause of the severe vibration was located and a method was proposed to eliminate the severe vibration. After the elimination method was carried out, the maximum exciting force on the exhaust pipeline reduced from 343N to 36N and the first order mechanical natural frequency increased from 4.7Hz to 14.7Hz. The actual operating vibration data of the reformed pipeline shows that the amplitude of vibration speed was greatly decreased and The maximum vibration speed decreased from 44 mm/s to 3.7 mm/s. The maximum vibration speed of the exhaust pipeline was total- ly acceptable and satisfying.
作者
吴晗
冯健美
彭学院
WU Han FENG Jian-mei PENG Xue-yuan(School of Energy and Power Engineering, Xi＇an Jiaotong University, Xi＇an 710049, China)
出处
《压缩机技术》
2016年第5期28-33,共6页
Compressor Technology
关键词
隔膜压缩机
气流脉动
管道振动
模态分析
diaphragm compressor
flow pulsation
pipeline vibration
modal analysis
