A MONITORING SYSTEM FOR ROTOR LIFE EXPENDITURE OF A STEAM TURBINE OF 330MW

摘要

A monitoring system of rotor life expenditure for a steam turbine of 330MW is presented in this paper. Life expenditure due to creep and low cycle fatigue is calculated with rotor stresses on both outer and inner surfaces evaluated by means of mean integral temperature and temperatures of both rotor's outer and inner surfaces by measuring inner cylinder metal temperature of stage 1, inlet steam pressure and temperature as well as exhaust steam pressure. Furthermore , such a monitoring system is designed to be foundation for predictive maintenance based on rotor's life expenditure.