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脱粒滚筒的速度对脱粒机的脱粒质量和使用安全有很大的影响。滚筒速度过低,造成脱粒机效率低、籽粒脱不净;滚筒速度过高,不仅损伤籽粒、加大机器振动和功率消耗,而且容易发生人机事故。目前,生产使用的小型脱粒机,机型繁杂,滚筒直径不一。即使滚筒转速相同,但因滚筒直径各异,其速度也不一样。因此,笼统要求滚筒转速为多少,是不甚确切的,严格地说,滚筒速度是指滚筒外圆的线速度,因此,正确选用脱粒机皮带轮的直径应按下式计算:
The speed of the threshing drum has a great influence on the threshing quality and safety of the thresher. Drum speed is too low, resulting in low efficiency of the thresher, the grain off the net; drum speed is too high, not only damage the grain, increase machine vibration and power consumption, and prone to human-computer accidents. At present, the production of small thresher, complicated models, drum diameter varies. Even if the drum speed is the same, but the drum diameter is different, its speed is not the same. Therefore, the general requirements for the number of drum speed, is not exact, strictly speaking, drum speed is the outer cylindrical roller speed, therefore, the correct choice of thresher pulley diameter should be calculated as follows: