Аналіз причин пошкодження турбогенераторів та гідрогенераторів шляхом визначення скаладнонапруженного стану деталей

Abstract

The analysis of possible causes of emergency situations in the operation of large electric machines at different operating modes was carried out in order to find the ways of improvement of Turbogenerators and Hydrogenerators reliability. Due to the fact that the generators shall be free from damage and residual deformations and withstand for 2 minutes emergency increasing of rotational speed of 20 % above rated one, and upon the inquiry of the Customer, the generators can be manufactured that allow emergency increasing of rotational speed up to 30% higher than the rated one, it is necessary to carry out calculations of complicated stressed state by the methods of finite elements and CFD.