Authors

Abstract

As the front-end component of the harvesting header in corn harvesters, the smooth feeding of stalks during the operation of the stalk dividing mechanism plays a crucial role in reducing the harvester’s operating losses. In this study, the mechanical properties of stalks under the action of stalk division were systematically analyzed, and a kinematic model of the stalk-stalk dividing mechanism was established. The adaptability characteristics between the layout form of the stalk dividing mechanism and single-plant stalk feeding were clarified through experimental statistics and theoretical analysis. Based on the key influencing parameters, an orthogonal test scheme was designed and field validation was conducted. A regression prediction model and a response surface model between the feeding success rate and the parameters were constructed. Validation tests were performed using the optimized parameter combination, and the results showed that the single-plant stalk feeding success rate reached 97.65%±0.08%, with the operating loss in the stalk division stage meeting the expected requirements. This study provides a theoretical basis and technical support for the parametric design and layout optimization of the stalk dividing mechanism.

Abstract in Chinese

分禾机构作为玉米收获机收获割台的前端部件，其作业过程中茎秆的平稳喂入对降低收获机作业损失具有关键作用。本研究系统分析了分禾作用下茎秆的受力特性，建立了茎秆-分禾机构的运动学模型，通过试验统计与理论分析明确了分禾机构布局形式与单株茎秆喂入的适配特性。基于关键影响参数设计正交试验方案并开展田间验证，构建了喂入成功率与参数的回归预测模型及响应曲面模型；采用优化后的参数组合进行验证测试，结果显示单株茎秆喂入成功率达 97.65%±0.08%，分禾环节作业损失符合预期要求。为分禾机构的参数化设计及布局优化提供了理论依据与技术支撑。