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播种深度稳定性分析和无耕地种植者平行四条行单元的试验验证
Jiajie Shang1, Dongmei Liu1, Xingtao Song1
1Northeast Agricultural University, College of Engineering, Harbin, Heilongjiang, 150030, PR China.
Heliyon
|October 15, 2024
概括
提高无耕种种植者播种深度的稳定性需要优化并行4条形状机制 (PFPM). 向上倾斜PFPM并增加弹力,可以提高标轮下压力 (GWD) 的稳定性和在高速时播种的一致性.
科学领域:
- 农业工程 农业工程
- 土壤力学 土壤力学
- 机械设计 机械设计
背景情况:
- 无耕种种植器表现出不良的播种深度稳定性和一致性,特别是在高速操作期间.
- 这种不稳定性与行单元分析机制的次优结构和参数选择有关.
- 平行四条形状机制 (PFPM) 理想情况下需要平行连接到地面以获得稳定性,这种条件在不均的无耕土壤中没有得到满足.
研究的目的:
- 为了提高尺寸轮下压力 (GWD) 和无耕作种植者行单元的播种深度的稳定性.
- 为了研究PFPM的倾斜角度,弹额外下压力 (SAD) 和GWD稳定性之间的关系.
- 为优化高速无耕作种植者设计和应用提供理论基础.
主要方法:
- 为PFPM开发了一个稳定状态分析矩阵方程,以分析SAD变化与倾斜角度和弹连接偏移的SAD变化.
- 使用单因素控制变量方法进行了实验室和实地测试.
- 分析了PFPM倾斜角度和SAD对播种深度稳定性的影响.
主要成果:
- 随着PFPM向上倾斜的角度,SAD非线性增加;最大SAD值达到2258.05N,具有特定的弹偏移.
- 上升8度的PFPM倾斜显著增加了GWD (高达984N),改善了GWD稳定性 (高达56.16%) 和沟深度稳定性 (高达30.00%) 在测试速度 (8-12公里/小时) 中.
- 在10公里/小时时,添加弹将平均GWD增加353N,并将GWD和沟深度稳定性分别提高了34.38%和20.00%.
结论:
- 向上倾斜PFPM和应用SAD是改善GWD和种植深度稳定的有效策略.
- 这些发现验证了理论分析,并为设计和调整高速无耕作种植机提供了实际指导.
- 优化的PFPM参数有助于在具有挑战性的无耕条件下更一致和稳定的种子放置.
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