タービン発電機の熱的バランス法 : 熱的振動因子と熱的バランス法

概要

論文の詳細を見る
A middle-load thermal power turbine generator frequently exceeds its critical speed, and it must be balanced at the critical speed carefully. Also, it is desirable to thermally balance the generator rotor at a factory to reduce the shaft vibration stroke caused by a load change at rated speed. In particular, when the generator capacity exceeds 500MVA, the generator rotor shifts from the secondary mode to the tertiary mode, and the in-phase unbalanced sensitivity increases due to the thermal bending of the shaft and other causes. As a result, thermal balancing is required in addition to conventional mechanical balance. This study presents a method for adjustment in order to decrease the thermal vibration stroke. By analyzing the kind of thermal cause in vibration phenomena and diagnosing the rotor condition with a vibration measuring equipment, it was possible to predict the cause of the thermal vibration and decrease its stroke. By this method, a satisfactory vibration level was achieved for 600MW〜700MW class turbine generators.
社団法人日本機械学会の論文
1996-08-25