某天然气增压机振动故障诊断及处理  

Fault Diagnose and Disposal of Vibration on Natural Gas Compressor

作　　者：白云山 马金铭 龙颜长 田鑫 郝建刚 BAI Yunshan;MA Jinming;LONG Yanchang;TIAN Xin;HAO Jiangang(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou,Zhejiang 310037,China;Tianjin Huadian Junliangcheng Power Co.,Ltd.,Tianjin 300000,China)

机构地区：[1]华电电力科学研究院有限公司,浙江杭州310037 [2]天津华电军粮城发电有限公司,天津300000

出　　处：《东北电力技术》2022年第1期37-40,共4页Northeast Electric Power Technology

基　　金：国家重点研发计划专项(2019YFF0216101,2019YFF0216105)。

摘　　要：针对某燃机发电厂天然气增压机在运行过程中出现的严重振动波动问题,详细介绍了机组的振动特征,指出造成机组振动波动的原因为自激振动。通过对运行参数、振动频谱分析及增压机效率计算,进一步明确了振动过大的原因为增压机运行中出现了气流激振,对其结构及运行方式进行研究,精确推断出再循环阀存在严重内漏问题。通过停机检修,发现再循环阀芯与阀体间存在1 cm间隙,占其通流面积的40%。因此,证实了所采用的诊断方法和故障处理措施对同类型机组的振动故障处理有效。To solve the vibration problem of a natural gas compressor,vibration characteristics of the unit is introduced precisely,and it points out that the cause of vibration fault is self-excited vibration.Based on the analysis of operating parameters,vibration frequency spectrum and calculation of compressor efficiency,it is further clarified that the reason of excessive vibration is airflow excitation during compressor operation.Combined with the study of unit structure and operation mode,it is accurately inferred that the bypass valve has serious internal leakage problem.It is found that there is 1 cm gap between core and body of bypass valve,and it accounts for 40%flow area.The conclusions is confirmed by inspection of the unit.The adopted diagnosis and fault-disposing measures have reference value for vibration fault disposal on similar kind of units.

关 键 词：天然气增压机 振动波动 气流激振 再循环阀内漏 

分 类 号：TM62[电气工程—电力系统及自动化]