摘要
本文从流体力学基本方程出发,建立起一组描述在迷宫密封腔中气流流动情况的偏微分方程组,并应用特征线方法求得了其解.同时还按不同工作条件下密封腔内的压力分布,进行了迷宫装置刚度的计算.为了从实验方面也能对迷宫气流激振形成的迷宫装置的动力特性进行研究,设计并制造了一台可以在多种条件下进行试验的试验台.通过试验,测得了在不同工作条件下各密封腔内的压力分布,从而得到了以实测为基础的迷宫装置的刚度系数.实验还结合振动频谱分析,研究了各种参数对转子系统稳定性的影响.文中将实验结果与理论分析进行了比较,两者间的相符情况是令人满意的.
Started from the basic hydrodynamic equations, a set of partial differential equations describing the flow situation of fluid flowing through the labyrinth seal have been deduced and then solved by using the method of characteristic line. At the same time, the restoring and cross-coupling stiffness of the labyrinth seal has been calculated according to the calculated pressure distributions in labyrinth chambers under various operation parameters. Used for experimental studies, a labyrinth flow exciting testing rig which can be operated under various conditions has been established. The pressure distributions in labyrinth rig chambers have been measured under various operation conditions. From this the experimental labyrinth seal stiffness has been got. During the experiments, the vibration spectra have been recorded and analysed.The influences of various parameters upon the stability of rotor systems have been studied. The experimental and theoretical results have been compared and the coincidence between them is Satisfactory.
出处
《振动工程学报》
EI
CSCD
1990年第2期48-58,共11页
Journal of Vibration Engineering
关键词
迷宫密封
气流激振
动力系数
labyrinth seal
dynamic characteristics
flow induced exciting forces
