With the increase of new energy capacity,the depth and frequency of peaking of thermal power units are also increasing,which leads to an increase in non-conventional vibration fault.In view of the abnormal increase of low-pres-sure rotor vibration during the normal peak-shaving operation of No.2 unit in a factory,the cause analysis and diagnosis are carried out,it is pointed out that the water intake of low pressure shaft seal is the main cause of abnormal increase of vibration and bending of low pressure rotor.The vibration problem caused by bending of low-pressure rotor is reduced by dynamic balance on site.The vibration problem of the unit can be solved by strengthening the monitoring of shaft seal temperature and other parameters in operation.
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维普
