汽流激振对汽轮机转子振动特性的影响  

Effect of Vibration Characteristics of Steam Turbine Rotor by Steam Flow Excited Vibration

作　　者：薛川 曹丽华[1] 司和勇 XUE Chuan;CAO Li-hua;SI He-yong(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012

出　　处：《汽轮机技术》2022年第6期451-455,共5页Turbine Technology

摘　　要：汽轮机实际运行中热、动载荷对其转子振动特性影响明显,通过集总参数法模化汽轮机高压缸转子建立各向异性支承模型,并将耦合前后前8级的汽流激振力施加在转子上,采用Riccati传递矩阵法求解并分析其对转子振动特性的影响。结果表明:考虑热、动载荷的转子涡动轨迹两端较小,中间较大;耦合热、动载荷前后转子涡动轨迹方位角都随着负荷和结点的增加而变大,且负荷越大椭圆轨迹方位角变化量越大,其中耦合后的变化更为明显。In the actual operation of steam turbine,the thermal and dynamic loads had obvious effects on the vibration characteristics of rotor.The anisotropic bearing model was established by modeling the high-pressure cylinder rotor of a steam turbine by the lumped parameter method.The steam flow excitation force of the first 8 stages before and after the coupling was applied to the rotor,and the influence of steam flow excited vibration on rotor vibration characteristics was obtained by the Riccati transfer matrix method.The results show that the two ends of the ellipse trajectory are smaller and the middle is larger considering the thermal and dynamic loads.Before and after coupling thermal and dynamic loads,the azimuth of ellipse trajectory increases with the increase of load and nodes.The greater the load,the greater the change scope of azimuth.

关 键 词：超超临界汽轮机 热、动载荷 汽流激振 转子动力特性 

分 类 号：TK264[动力工程及工程热物理—动力机械及工程]