组合式轴流脱分装置动力学仿真

为了从力学的角度对轴流脱粒空间的脱粒机理进行进一步探讨，根据动力学原理，建立螺旋叶片板齿组合式轴流脱粒装置的动力学模型，分析稻谷在装置中受力情况，并对脱粒过程进行仿真。研究结果表明在整个脱粒过程中，谷物沿着叶片边缘螺旋线方向受力分布不均匀，当稻谷沿着螺旋叶片运行到距喂入口5～9 m区间时，此时加速度达到整个脱粒过程中的最大区域。凹板、盖板与滚筒之间的谷物受力明显高于滚筒反力和叶片反力，证明凹板与盖板参数是影响稻谷轴流脱粒的主要因素。

Dynamic simulation of assembled axial flow threshing and separating device

In order to discuss threshing mechanism of axial threshing space further from the view of mechanics, the authors explored a dynamical model of axial flow threshing device with plunk-tooth and helical vanes assembled. Based on the principle of dynamics, mechanical condition of threshing grain was analyzed, and the force that loaded on the grain was simulated in the course of threshing. Results show that the force is uneven along the edge of helical vanes. When grain moves to the area with the range from five to nine meters near to feeding entrance along helical vanes, the acceleration reaches the maximum areas during the threshing period. The force on the grain between the concave board, cover board and cylinder is evidently higher than that on the grain in other space, which indicates that the parameaters of cover board, concave board are main factors of axcial flow threshing.