College of Mechanical and Electronic Engineering,China University of Mining and Technology,Xuzhou　 221116,China

为解决传统筛分设备在处理潮湿细粒煤炭时存在严重堵孔的问题,设计了一种单边驱动式弛张筛。根据单边驱动式弛张筛的结构和筛面弛张原理,建立了弛张筛筛面的动力学模型,研究了正、负两种张紧量对筛面动力学参数的影响。借助Matlab软件绘制出筛面中点的位移、速度、加速度特性曲面,将正、负两种张紧量对筛面动力学参数的影响加以对比分析。利用ANSYS Workbench软件对不同张紧量的筛面进行瞬态动力学分析,研究筛面中点的位移、速度、加速度最大时,筛面上各点的位移、速度、加速度分布情况。研究结果表明:随张紧量的增加,筛面的挠度减小,速度、加速度增加。当筛面张紧量选取在2 mm左右时,筛面加速度能够达到50 g,筛分效果比较理想。

In order to solve the problem of serious clogging that the traditional screening equipment has in sieving the moist fine coal,a kind of unilateral driven flip-flow screen (UDFS) was designed. Based on the structure and principle of the UDFS,a dynamic model of the UDFS surface was established,and the effects of the positive and negative tension on the dynamic parameters of the screen surface were studied. Then,the displacement,velocity and acceleration char- acteristics of the mid-surface were plotted using Matlab software,and the influence of tension amount on the dynamic parameters of the screen surface were compared and analyzed. Finally,the transient dynamics analysis of the screen surface with different tensions were carried out using ANSYS Workbench software. In addition,the distribution of dis- placement,velocity and acceleration of the screen surface were studied when the displacement,velocity and accelera- tion of the mid-surface were the largest. The results illustrate that with the increase of tension,the deflection of the screen surface decreases,the velocity and acceleration increase. When the screen surface tension is selected at about 2 mm,the acceleration can reach 50 g,and the screening effect is ideal.

ZOU Mengqi,LIU Chusheng,WU Jida,et al. Influence of tensional amount on dynamic parameters of unilateral driven flip-flow screen sur- face[J]. Journal of China Coal Society,2018,43(2):571-567.