Authors

Abstract

The influence of the device's structure and operating parameters, along with the material properties of millet, on threshing and separation performance forms the theoretical basis for designing and researching a single longitudinal axial flow threshing and separation device specifically adapted to millet. Therefore, a theoretical model for grain threshing and separation in a single longitudinal axial flow threshing device was established based on variable mass theory. To validate the theoretical model, single-factor tests were conducted on the feeding rate, rotational speed, and water content of Longgu 31 millet. The error analysis between the experimental and calculated values indicates that within a moisture content range of 17.14% to 32.93%, feeding rates varying from 1 to 3 kg/s, and rotational speeds ranging from 700 to 1000 r/min, the R-squared values consistently exceed 0.97. This indicates an excellent fit of the theoretical model. The theoretical model will serve as a valuable reference for the design and investigation of the single longitudinal axial flow separation device.

Abstract in Chinese

谷子的物料特性和装置的结构参数、工作参数对脱分性能的影响，是适应谷子特性的单纵轴流脱分装置设计和研究的理论依据。因此，应用变质量理论建立了谷子在单纵轴流脱分装置内的脱分理论模型，并构造了脱粒参数和分离参数的表达式。为了验证理论模型，选取龙谷31号为试验对象，在搭建的单纵轴流脱粒分离试验台上开展了谷子的喂入量、转速、含水率单因素试验，并将试验数据与模型计算数据进行误差分析，对比结果表明：当含水量为17.14%-32.93%、喂入量为1-3kg/s，转速为700-1000r/min时，试验数据与模型计算数据的R-Squared误差均大于0.97，理论模型的拟合度好。因此，理论模型将为单纵轴流脱离分离装置的设计和研究提供参考。