油菜清选装置筛面气流场的分布规律研究

Distribution rules of airflow field in rape cleaning device

为探明油菜清选装置振动筛筛面上的气流场分布规律,对穿过上筛面的风速进行了测定。结果表明:沿筛面横向方向气流基本保持稳定,沿纵向方向各行风速从大到小排列为第5行、第3行、第2行和第4行。利用1stOpt软件对测得的风速值进行拟合,得到了不同风机转速条件下上筛面的风速分布方程,通过Matlab软件对方程绘图发现,气流分布大致呈前高、中部略有下降和尾部再次上升的趋势,且风机转速主要对通过筛面的气流速度产生影响,而对筛面上气流场的分布几乎没有影响。

For studying airflow field distribution rules on vibrating screener＇s surface,the airflow running through the up sieve surface were measured.Results indicate that the airflow is stable along horizontal direction,and the sequence of wind speed of each lines,from the largest to the smallest in size,is fifth row,third row,second row and fourth row along the longitudinal direction.By using 1stOpt software,to fit the wind speed values,and the wind speed distribution equation of up sieve surface under different fan speeds was obtained.Using Matlab software to convert the equation to the surface diagram,indicated that the airflow distribution tends to rise at first,slightly decline at middle part,and rise again at the end in general,and the fan rotation speed of fan mainly affect the size of the airflow velocity of up sieve and almost has no effect on the distribution of airflow field of the entire.