The Research Of Condition Of Operating Change And The Safe Function For 300MW Steam Turbine

The research object of this text is N300 -16.7/537/537-5 type of steam turbine which ismade by East Steam Turbine Factory, we carry on changing the work condition by COBOLand stress analysis. We introduce the detailed principle of changing the work conditioncharacteristic of steam turbine rotor, and adopt to face to the object type development toolDELPHI to draw up the work condition point according to the analysis procedure, andintroduce to draw up principle to combine the analysis result with attach form of the form,providing the basis of circulatation for the spot. This text will use a limited unit method ofANSYS machine to imitate a calculation about the temperature field to the 300 MW steamturbine rotor and stress field, giving with the calculator output's sketch form calculation result,passing to the analysis that computes a result, find out dangerous piece noodles withcorrespond of stress value in the starting process. At last, according to the result ofcalculating and analysis , we will analyse influence factor of thermal stress and life span tosteam turbine rotor, and get how is reasonable to control thermal stress of steam turbine rotor,the life span etc. to have the conclusion of the safety reference value.