[Purposes]Generator set#1 in a certain power plant experienced excessive amplitudes in the electric motors of cooling water pumps A and B,surpassing the specified standard values.Moreover,the vibrations were unstable,with an increasing trend in amplitude,which poses a significant risk to the safe and stable operation of the equipment.To eliminate abnormal equipment vibrations and ensure safe and stable operation,it is necessary to conduct vibration monitoring and analysis.[Methods]Through moni-toring and analysis with a vibration analyzer,it was determined that loose grounding bolts,motor base plate deformation,and ineffective grouting of the foundation were the reasons for the excessive ampli-tudes in the electric motors.[Findings]After tightening the grounding bolts,the amplitudes in all direc-tions of the cooling water pump B electric motor decreased within the standard range.As there was no plan for a shutdown in the near future,it is impossible to grout the motor foundation or replace the base plate.Therefore,a creative fastening components was devised.[Conclusions]This fastening component can effectively solve the problem of excessive vibration caused by deformation of the platform and lack of grouting in the foundation.
关键词
定冷水泵电动机/基础松动/二次灌浆/地脚螺栓/紧固组件
Key words
stator cooling water pump motor/looseness of the foundation/secondary grouting/rag bolt/the fastening components
维普
万方数据