Authors

Abstract

In response to the problems of high glume cluster rate, significant losses, and limited adaptability during millet combine harvesting in China, an independent test bench for a single longitudinal axial-flow threshing and separation device was designed and constructed. Millet moisture content, feeding rate, and threshing drum rotational speed were selected as the influencing factors, while impurity rate, glume cluster rate, and total loss rate were used as evaluation indices. Single-factor experiments and orthogonal rotational combination tests were conducted. The experimental results show that the order of influence on impurity rate, glume cluster rate, and total loss rate is: moisture content > rotational speed > feeding rate. The optimal operating parameters obtained were: moisture content of 24.82%, feeding rate of 2.25 kg/s, and drum rotational speed of 835 r/min. Under these conditions, the impurity rate reached 31.90%, the glume cluster rate was 21.56%, and the total loss rate was 0.72%. These findings provide a technical reference for the future design and development of single longitudinal axial flow threshing and separation devices specialized for millet harvesting.

Abstract in Chinese

针对我国谷子联合收获过程中存在碎谷码率高、损失大、适应性差等问题，自行设计搭建了组合式单纵轴流脱分分离装置试验台，选取谷子含水率、喂入量、滚筒转速为影响因素，以碎谷码率、含杂率、总损失率为指标，分别进行了单因素试验和正交旋转组合试验。试验结果表明：对含杂率和碎谷码率的作用顺序为含水率>转速>喂入量，对总损失率的作用顺序为含水率>喂入量>转速。获得最优试验参数为：含水率24.82%，喂入量2.25kg/s，转速835r/min。在此条件下，含杂率为31.21%，碎谷码率为19.73%，总损失率为0.73%。试验结果为今后适用于谷子的单纵轴流脱粒分离装置的设计和研究提供参考。