受迷宫汽封汽流力影响的汽轮机转子动特性系数研究

The Study of Dynamic Coefficient of the Turbine Steam Rotor Affected by the Steam Flow Force on the Labyrinth Seal

用等效刚度和阻尼系数对某汽轮机迷宫汽封蒸汽对转子的流体力进行描述,归纳汽轮机转子各位置处汽封等效刚度与阻尼系数的变化规律,进而分析参数变化对机组稳定性的影响,为机组的安全稳定运行提供技术支持。分析表明:汽轮机转子不同位置处的汽封等效刚度与阻尼系数存在一定的变化规律,单纯更改汽封间隙不是提高机组转子稳定性的有效办法。

Use the equivalent stiffness and damping coefficient to describe the turbine steam force between the rotor and labyrinth seal,summarize the law of the stiffness and damping coefficient at the different position of rotor＇s steam seal.Then the stability effects of the parameter variation are analyzed,and provide technical support for safe and stable operation of the unit. It is found that the stiffness and damping coefficient variation has a law at the different position of rotor＇s steam seal,and change the steam seal＇s clearance is not a valid method to improve the stability of the rotor.