Diagnosis and Treatment of Large Rotor Vibration Fault for Ultra-supercritical 1030MW Steam Turbine
According to the vibration fault of a 1030MW turbine-generator set after comprehensive trans-formation during commissioning,the diagnosis,analysis and treatment work are carried out.Through the analysis of the spectrum diagram and trend diagram collected during the start-up process,combined with the changes of the shaft seal body temperature and the temperature of the low pressure cylinder descaling water,it is found that the rotor thermal bending and dynamic and static interaction are the main reasons for the large vibration of the rotor,while the rotor mass imbalance is the secondary reason.In addition,the concrete measures to solve the vibration are given,which not only deals with the nozzle of low pres-sure cylinder and the steam supply pipe of shaft seal,but also adjusts the balance state of shaft system of rotor.This provides reference and reference for vibration fault handling in the start-up stage of such modified models in the future.
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