Abstract: This paper analyzes the dynamic problem of flexible axle relvant to screw drill tool andscrew pump,obtains the self-oscillation frequency and dynamic unstability conditions bymeans of the Calerkin method,and provides the theoretical basis for structure design andwork parameter selection of a flexible axle.

Key words: screw drill tool, screw pump, transmission shaft, dynamic analysis

摘要： 从理论上详细分析了螺杆钻具与螺杆泵中挠性轴的动态问题.借助于加权残数法获得了挠性轴的自振频率及动力学失稳条件,从而为挠性轴的结构设计及工作参数选择提供理论依据.

关键词: 螺杆钻具, 螺杆泵, 传动轴, 动态分析