二自由度振动筛运动学分析及仿真试验

以二自由度(two degree of freedom,2-DOF)振动筛试验平台为研究对象,对二自由度振动筛试验平台简化模型的运动规律及筛面上物料受力情况进行分析,并对所建立的简化模型的合理性进行验证,得到影响简化模型及物料运动的关键因素。利用ADAMS仿真软件对单自由度振动筛模型和二自由度振动筛模型进行仿真研究,结果表明:单自由度机构筛面倾角有微小的变化,二自由度机构筛面倾角在4°~10°之间变化,两个机构水平位移变化量均为65mm,其位移变化规律基本相同;单自由度垂直方向位移为7.5 mm,二自由度机构垂直方向位移变化在0~60mm之间;二自由度横向加速度大于单自由度,垂直加速度小于单自由度。

Kinematic analyses and simulation of two degree of freedom vibration screen

A three-dimensional model of 2-DOF vibration screen was established and the working principle of this vibration screen was analyzed.The model was simplified and the motion parameters were analyzed through analyzing the displacement,velocity,acceleration and the force to improve the efficiency of the screen.The rationality of the design of 2-DOF vibration screen was confirmed.A model of 1-DOF vibration screen and 2-DOF vibration screen were established with ADAMS simulation software to verify how the output freedom affects the movement of the screen.The curves of screen surface inclination,horizontal displacement and acceleration,vertical displacement and acceleration from two different screens were obtained through simulation analysis.The horizontal acceleration of 2-DOF vibration screen was larger than that of 1-DOF.The vertical acceleration of 2-DOF vibration screen was less than that of 1-DOF.It is indicated that this design requirements is reasonable.It will provide a reference for optimizing the vibration screen.