| 王海翼,李彦彬,王圆明,张兆国,陈红,王连瑞.抛膜钉齿式残膜弧形起膜捡拾装置设计与田间模拟试验[J].干旱地区农业研究,2021,39(4):209~218 |
| 抛膜钉齿式残膜弧形起膜捡拾装置设计与田间模拟试验 |
| Design and field simulation test of throwing film nail tooth arc picking up device for residual film |
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| DOI：10.7606/j.issn.1000-7601.2021.04.27 |
| 中文关键词: 残膜回收 起膜捡拾装置 受力分析 运动机理分析 抛膜装置 钉齿式 |
| 英文关键词:recovery of residual film film collector pickup device force analysis motion mechanism analysis film throwing device nail tooth |
| 基金项目:国家重点研发计划项目（2017YFD0700604-2）；云南省重大科技专项（2016ZF001，2018ZC001-3） |
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| 中文摘要: |
| 现有残膜回收机起膜装置难以彻底刨出土壤耕层内残留的多年废弃地膜，致使地膜继续沉积，严重破坏土壤再生能力。针对现有起膜装置碎片回收率低、漏收率较高的问题，设计了一种弧形起膜捡拾装置配合抛膜弹齿式残膜回收机使用，该装置主要由输膜辊、喂入辊、U形喂入齿、起膜杆齿、弧形钉齿等组成。在阐述整体结构、具体工作原理及主要部件设计特点的基础上，通过理论计算确定主要工作部件的结构参数。对弧形起膜捡拾装置主要部件进行受力分析和运动机理分析，并建立了运动学模型，分析得出弧形钉齿运动轨迹为余摆线，根据总体机构的运动学模型和钉齿尖运动模型的对比计算，得出残膜不漏扎、不漏挑的条件。利用Comsol软件对主要工作部件进行多体动力学和多物理场田间模拟试验，追踪粒子轨迹，以平均颗粒流速、平均横向颗粒速度、质量流率及旋转轴总力矩为试验因变量进行正交仿真试验，试验结果表明最优参数组合为工作速度1.2 m·s-1、入土深度35 mm、挑膜转速55 r·min-1。该工作参数下试验结果分别为平均颗粒流速0.9738 m·s-1，平均横向颗粒速度0.0278 m·s-1，质量流率0.0091 kg·s-1，钉齿总力矩38.9576 N·m。 |
| 英文摘要: |
| It is difficult for the existing residual film recovery device to thoroughly dig out the abandoned plastic film in the plough layer, resulting in the continuous deposition of plastic film and serious damage to the soil productivity. Aiming at solving the problems of low recovery rate and high leakage rate of the existing film recovery device, an arc\|shaped film collector was designed to work with the film throwing spring tooth residual film recovery machine. The device was mainly composed of film conveying roller, feeding roller, U\|shaped feeding teeth, film producing finger, arc\|shaped nail tooth, etc. Based on the overall structure, the operational principle and the design characteristics of the main components, the specific structural parameters of the main working parts were determined through theoretical calculations. This paper analyzed the force and motion mechanism of the main components of the arc\|shaped film collector and established the kinematic model. The analysis showed that the arc\|shaped nail tooth trajectory was trochoid curve. According to the comparison between the kinematic model of the overall mechanism and the motion model of the nail tooth point, the conditions for binding and picking of the residual film were obtained. The field simulation experiments of multi\|body dynamics and multi\|physical fields were carried out on the main working parts by COMSOL, and the particle trajectories were tracked. The orthogonal simulation experiments were carried out with the average particle velocity, the average transverse particle velocity, the mass flow rate and the total moment of rotation axis as the dependent variables. The experimental results showed that the optimal parameters were working speed 1.2 m·s-1, embedded depth 35 mm, film picking speed 55 r·min-1. Under the working parameters, the test results were as follows: average particle velocity: 0.9738 m·s-1, average transverse particle velocity: 0.0278 m·s-1, mass flow rate: 0.0091 kg·s-1, total moment of nail tooth: 38.9576 N·m-1, which can improve the residual film producing and collecting effect of the device, and provide a theoretical basis for the manufacture, parameter optimization and development of the physical prototype. |
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