Hammer mills are widely used for grinding grain products. Screens are one of the important machine components that affect the performance of hammer mills. Generally, round-hole screens are used in hammer mills. In this study, the effects of oblong- and round-hole screens on hammer mill performance were investigated. The results showed that the mean geometric diameter, geometric standard deviation, specific surface area grinding capacity and specific energy consumption varied with the screen type, screen hole size and hammer tip speed. The particle size distribution with the oblong-hole screen was more stable, and its grinding capacity (1.481 t/h) was higher than that of the round-hole screen (1.220 t/h). The specific energy consumption of the oblong-hole screen was lower than that of the round-hole screen. The lowest specific energy consumption (2.805 kWh/t) was measured at a hammer tip speed of 60 m/s for the oblong-hole screen with a hole size of 19.8 × 2.5 mm.

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椭圆孔筛和圆孔筛对锤磨机性能的影响

锤式粉碎机广泛用于谷物产品的研磨。筛子是影响锤磨机性能的重要机械部件之一。通常，圆孔筛用于锤磨机。在这项研究中，研究了椭圆孔筛和圆孔筛对锤磨机性能的影响。结果表明，平均几何直径，几何标准偏差，比表面积磨削能力和比能耗随筛类型，筛孔尺寸和锤尖速度的变化而变化。椭圆孔筛的粒度分布更加稳定，其研磨能力（1.481 t / h）高于圆孔筛（1.220 t / h）。椭圆孔筛的比能耗低于圆孔筛的比能耗。最低单位能耗（2。