不同配汽方式下汽轮机调节级后转子的热应力分析.pdf

5 1 4 V ol. 5 1 N o. 4 2009 8 TURB INE TECHNOLOGY A ug. 2009 李 勇, 聂玉火 (东北电力大学能源与机械工程学院, 吉林 132012) : , , , , : ; ; ; : TK267 : A : 100 15 884 ( 2009) Th erm al S tress Analysis of S team Turb ine R otor beh ind th e G overn ing Stage in D ifferen t G overn ing M odes L I Y ong, N IE Y uhuo ( Schoo l o Energy R esources and M echanica l Eng ineering, N o rtheast D ianliU n iversity, J ilin 1320 12, Ch ina) A bstrac t: A t present, there are still som e mi po rted steam turbines tha t are orig inal designed to operate in thro ttling gove r n ing, w h ich lead to the low e ic iency o steam turb ine at part load. In o rder to enhance econom ica l per o rmance o steam turbine, it has to be turned into nozzle govern ing. In this paper, irstly, the chang ing o temperature beh ind the govern ing stage in di erent governing modes are ana ly zed, then tem pera ture ield and therm a l stress ie ld o the roto r beh ind the gov e rning stage in di erent steam d istr ibu tion m odes are calculated. F ina lly, the determ in ing m ethod o the v ariab le load ve loc ity is show ed w hen the contro lling m ode is changed rom throttle to nozzle. K ey w ord s: steam turb ine; govern in g m odes; govern in g stage; th erm a l stress , , 0 , , 1 , , , , 300MW , , , [ 1]