Authors

Abstract

Abstract: This study addresses the inefficiency and high energy consumption of current agricultural stone pickers by introducing a novel spiral cutter tooth design. Dynamic and kinematic analyses were performed to establish the structural and motion parameters of key components, as well as the primary factors influencing operational performance. Using EDEM software, discrete element simulations were conducted with a three-factor, five-level quadratic regression orthogonal design. Stone-picking efficiency and power consumption served as evaluation metrics. Regression analysis and significance tests clarified the impact and hierarchical importance of the machine's forward speed, spiral cutter drum speed, and drum tilt angle. Multi-objective optimization of the regression model identified the optimal parameter combination: a forward speed of 0.18 m/s, a drum speed of 260 rpm, and a drum tilt angle of 30°. Field tests conducted with this optimal setup achieved a stone-picking rate of 93.71% and a stable operational power of 4.63 kW, confirming the effectiveness of the spiral cutter tooth stone picker. These findings provide a theoretical foundation and reference for the structural design and optimization of stone pickers.

Abstract in Chinese

摘 要：针对现有农田捡石机捡石率低，消耗功率大等问题，提出了一种螺旋刀齿式农田捡石机，通过动力学和运动学分析，确定了关键部件的结构参数和运动参数范围，以及影响工作性能的主要因素。利用EDEM软件开展了离散元仿真试验，采用三因素五水平二次回归正交旋转中心组合试验方法，以捡石率和消耗功率为评价指标，对机具前进速度、螺旋刀辊转速和螺旋刀辊侧倾角进行回归分析和显著性检验，明确了各因素对评价指标的影响及主次顺序，通过对回归模型进行多目标函数优化求解，得出最佳参数组合为机具前进速度0.18 m/s、螺旋刀辊转速260 r/min、螺旋刀辊侧倾角30°。使用最佳参数组合进行了土槽试验，试验结果表明：捡石率为93.71%，稳定作业时的功率为4.63 kW，螺旋刀齿式捡石机作业稳定，为农田捡石机的结构设计和优化提供理论支撑与参考。