Authors

Abstract

Understanding the soil-straw disturbance pattern of the key component parameters of the straw mixing winged chisel plow is the key to designing and optimizing the straw mixing winged chisel plow (a chisel plow for mixing and mulching straw). In this study, a straw-soil-winged chisel plow interaction model was established, and the working principle, key components of the winged chisel plow were determined based on soil bin experiment and theoretical analysis. Discrete element method (DEM) was used to study the influence of disturbance pattern of key components of the winged chisel plow on soil-straw displacement, straw mixing rate and draught force. The results show that the main components of the winged chisel plow that affect the operating efficiency of the implement are the soil lifting plate height, the wing mounting height and the wing width. The height of the soil lifting plate affects the efficiency of the winged chisel plow in secondary disturbance of soil-straw and its own performance in turning over soil, with an optimal range of 110 mm-170 mm. The installation height of the wing mounting mainly affects the position of the soil lifting plate in the soil layer. In order to achieve the best operating effect, the position of the soil lifting plate needs to meet the "lower lifting and upper turning" requirement. The optimal installation height of the wing mounting is 95 mm-145 mm. The width of the wing mainly affects the working width of the implement, and its optimal value is 180 mm-220 mm. The width of the wing mainly affects the working width of the implement, and its optimal value is 180 mm-220 mm. The established simulation relative error is within 12.60%, which can better study the disturbance pattern of soil-straw. This study may provide a reference for optimizing and designing wing-type chisel plows and subsoil shovels.

Abstract in Chinese

了解混秸双翼凿式犁关键部件参数对土壤-秸秆的扰动规律，是设计和优化混秸双翼凿式犁（一种覆混秸秆的凿式犁）的关键。本研究建立了秸秆-土壤-混秸双翼凿式犁相互作用模型，以土槽试验为基础，结合理论分析确定了混秸双翼凿式犁的工作原理与关键部件，并采用离散元法（DEM），研究了混秸双翼凿式犁关键部件的参数变化对土壤-秸秆位移、机具混埋效果以及机具牵引力的影响规律。结果表明：混秸双翼凿式犁影响机具作业效果的关键部件为抬土板高度、铲翼的安装高度与铲翼的宽度。抬土板高度影响带翼凿式犁二次扰动土壤-秸秆的效率与其本身翻转土壤的性能，最优取值范围为110mm-170mm。铲翼安装高度主要影响抬土板在土层之中的位置，为了作业效果达到最佳状态，抬土板的位置需满足“下抬上翻”，铲翼安装高度的最佳取值为 95mm-145mm。铲翼宽度主要影响机具的作业宽度，其最佳取值为180mm-220mm。建立的仿真相对误差在12.60%内，能较好的研究土壤-秸秆的扰动规律。该研究可能为优化和设计翼式凿式犁和深松铲提供参考。