Analysis of High Temperature Creep Strength of High Pressure Steam Valves
High-pressure steam valves are important equipment for thermal power generating units,a 660 MW unit of the main steam temperature can reach 538 ℃,the valve operates at high temperatures and high pressures,subject to the action of temperature and steam pressure,high-temperature creep is likely to occur,and when serious,can lead to creep damage,causing accidents.The research process for the unit's high-pressure steam valve to carry out high-temperature creep strength analysis,first of all,to introduce the principle of creep and its three typical stages.Then through numerical simulation to explore the valve on the parts of the high-temperature creep stress.The results show that,with the occurrence of the creep process,the valve gradually release energy,high stress phenomenon in the creep after a significant decline,can reach a stable state of creep.
high pressure steam valvehigh temperature creep strength analysisstress field analysistemperature field analysis
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