单轴椭圆型振动筛动力特性的理论分析

Dynamic characteristic of single shaft inertia shale shaker

单轴椭圆型振动筛是一种结构简单和使用维修方便的钻井液固控设备。常规的单轴椭圆型振动筛具有完全对称的结构，工作状况常常不能令人满意。从理论上对非对称单轴椭圆型振动筛进行了探讨，给出了非对称单轴椭圆型振动筛筛面上各点的运动轨迹、速度及加速度，并对固相颗粒在筛面上的运移机理作了分析。指出尽管非对称单轴椭圆型振动筛更有利于钻屑的排出，运动更趋合理，但在进行结构设计时，激振中心的偏离位置不能超过极限状态，否则会导致钻屑后退。

The single shaft inertia shale shaker is one of solid control equipments which have simple structure and can be used and repaired conveniently. The conventional single shaft inertia shale shaker cannot usually provide satisfactory service owing to having a complele symmetrical structure. Non-symmetrical single shaft inertia shale shaker is investigated, and the motion trace, velocity and acceleration of every point on the screen surface are given, and the mechanism of the moving of the solids on the sereen surface is analyzed. It is pointed out that the offset of the vibrating center should be restricted to the limiting condition in structural design of the shale shaker.