摘要
中俄东线天然气管道工程唐山压气站在投产前对3#电动机进行空载调试的过程中,当电动机运行至3120 r/min时,励磁机端振幅快速上升并导致停机。为了解决这一问题,采用振动分析系统对励磁机端的振动图谱进行分析,判断故障原因为:励磁机端轴瓦负荷过高,导致励磁机转子局部负荷过高或局部摩擦,引起转子热弯,产生新的不平衡量而导致停机。拆卸轴瓦可见局部摩擦痕迹,验证了上述分析结果的正确性。通过调节励磁机端轴承底座高度,降低轴瓦负荷,消除了励磁机端振幅快速上升的现象,采用矢量图法对励磁机端进行平衡优化,使励磁机端振动满足API 546-2008《无刷同步电机·500 kVA及更高电压》的规定。采用该方法解决了唐山压气站3#电动机励磁机端振动过高的问题,为中俄东线天然气管道安全生产提供了保障。
In the no-load test of the 3#motor in Tangshan compressor station of China–Russia Eastern Gas Pipeline Project before commissioning,the amplitude of exciter end rose rapidly and resulted in the shutdown when the operating speed reached 3120 r/min.To solve this problem,the vibration analysis system was used to analyze the vibration spectrum of the exciter end.It was determined that the fault was caused by the high load upon the bearing bush at the exciter end,which further led to the high local load or local friction of the exciter rotor,induced the hot bending of rotor,caused the new unbalance,and further resulted in shutdown.Local friction marks was found during removal of the bearing bush,and the above analysis conclusion was verified.Through changing the height of bearing base at the exciter end,the bearing bush load was lowered and the rapid amplitude rise at the exciter end was eliminated.The exciter end was balanced and optimized by vector diagram method to ensure that the vibration at the exciter end can meet the requirements of brushless synchronous machines-500 kVA and larger(API 546-2008).Thereafter,the problem of high vibration at the exciter end of the 3#motor in Tangshan compressor station has been quickly solved,and the safe operation can be ensured.
作者
黄恩涛
王猛
张晏博
王春明
刘超
HUANG Entao;WANG Meng;ZHANG Yanbo;WANG Chunming;LIU Chao(PetroChina Pipeline Company;PetroChina Pipeline Compressor-Set Maintenance,Repair&Overhaul Center)
出处
《油气储运》
CAS
北大核心
2020年第5期565-569,共5页
Oil & Gas Storage and Transportation
基金
中国石油管道公司科技攻关项目“基于设备全面国产化的压气站一键启停技术研究及应用”,20180108。
关键词
励磁机
负荷
热弯
不平衡
矢量图法
exciter
load
hot bending
unbalance
vector diagram method
