并联振动筛具有良好的筛分效果,其研究已成为振动筛研究的热点.为便于对其进行优化控制,需对其筛分特性进行深入研究.通过考察并联振动筛的结构及其工作过程,得到了筛分特性曲线,分别用参数回归法和最小二乘法确定其特性参数,由此建立筛分模型.将理论计算结果与实验结果对照,经误差分析可知,最大误差为0.84％,平均误差为0.26％.所得模型精度高,构建方便有效.%Parallel vibration sieves have good screening effects. They have got wide attention in sieve studying. To implement the optimal control of a parallel vibration sieve, its screening characteristics should be studied in detail. Investigating the structure of a parallel vibration sieve and its work process, its screening characteristics curve was gotten and a screening model based on parametric regression method and least-square method was proposed. The theoretical calculation results were compared with the expriment results. And error analysis was performed. The maximum error gotten this way was smaller than 0. 84%, and the average error gotten was smaller than 0. 26%. The screening model has a high precision and is easy to be implemented.
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