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利用数学模型对煤用概率分级筛的动力学参数、工艺参数和结构参数进行了仿真研究，定量考察了分配粒度和可能偏差Ｅｐ随筛分机振幅、振动频率、抛射角及筛面长度的变化关系，并得到了筛面倾角和筛孔尺寸的最佳配合．所得结论不仅从趋势上与试验发现的一致，而且给出了具体的量化结果，表明所建立的筛分数学模型可直接应用于煤用概率分级筛的设计和参数优化．
The mathematical model was used to simulate the dynamic parameters, process parameters and structural parameters of the probabilistic sieve for coal, and quantitatively investigated the relationship between the distribution size and the possible deviation Ep with the amplitude of the sifter, the vibration frequency, the angle of attack and the length of the screen surface , And get the best combination of screen angle and screen size. The conclusion is not only consistent with the trend found in the test, but also gives the specific quantification results. It shows that the established mathematical model of sieving can be directly applied to the design and parameter optimization of coal probabilistic grading sieve.