蒸汽轴向流动对汽轮发电机组轴系扭振响应的影响  

The Torsional Vibration Response of Steam Turbo-Generator Shaft System in Account Steam Flowing

作　　者：黄树红[1] 刘峻华[1] 高伟[1] 晏水平[1] 

机构地区：[1]华中理工大学,武汉430074

出　　处：《动力工程》2000年第4期778-781,共4页Power Engineering

基　　金：国家"九五"攀登计划 !PD952 1 90 7资助项目; 国家重点基础研究专项经费! G1 9980 2 0 31 9资助

摘　　要：对在汽轮机高压和中压调节阀快关动作后蒸汽沿轴向流动过程对轴系扭振响应的影响进行了研究。轴系的计算模型采用连续质量模型。外激励模型是考虑了汽轮机 DEH系统、热力系统以及单机对无穷大电网的机电耦合数学模型。对 3 0 0 MW汽轮发电机组的仿真计算表明 ,考虑蒸汽流动导致的激励扭矩沿汽轮机轴向瞬时变化时 ,对轴系的扰动和轴系扭振的激励加强 ,蒸汽载荷变化对汽轮发电机组轴系扭振的影响是较大的 ,在轴系安全评价中必须加以考虑。图 4参The research of torsional vibration of large steam turbo generator shaft system before this paper do not take into account the effect of steam flow intergrad process. In this paper, the research results about the effect of steam flow to torsional vibration of shafts after the control valves fast closing are presented. The model of shaft system is continuous mass model. The combined math model of a digital electro hydro control system, thermal cycle system and a infinite electric network is considered. The simulation of a 300MW steam turbo generator shaft system which is divided into 233 shaft sections show that the disturb and exciting become stronger to shaft and torsional vibration when taking into account the steam flow intergrad process. So the effect of steam flow to shaft torsional vibration must be think of in safety evaluation of the shaft systems. Figs 4 and refs 3.

关 键 词：汽轮发电机组 蒸汽轴向流动 轴系扭振响应 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]