Authors

Abstract

To address the problems of low bale-forming rate and loose compaction during the mechanized recovery of residual plastic film in farmland, a three-stage residual film baling device was developed. Based on the discrete element method (DEM), a flexible thin-shell model of the residual film was established, and dynamic simulation and parameter optimization of the baling process were carried out using Rocky DEM software. Combined with single-factor experiments and response surface methodology, the effects of baling chamber inclination angle, belt type, belt linear speed, and upper belt inclination angle on bale integrity and compaction were analyzed. The results showed that the bale-forming rate of the three-stage device reached 99.13%, and the bale density reached 83.75 kg/m³ under the optimal conditions: baling chamber inclination angle of 30°, upper belt inclination angle of 30°, belt linear speed of 2.3 m/s, and the use of a rough-surface belt. Field validation tests showed that the average density of the residual film bales was 91.4 kg/m³, with a prediction error of only 2.23 kg/m³ compared with the simulation results. The device operated stably and reliably. This study presents a high-efficiency residual film baling device with improved bale-forming rate and compaction performance through structural optimization and parameter tuning, providing technical support for efficient recovery and pollution control of residual plastic film in farmland.

Abstract in Chinese

针对机械化农田残膜回收过程中出现的袋装率低和薄膜包装松散的问题，本研究开发了一种三阶段残膜包装装置。基于离散元方法，建立了残膜的柔性薄壳模型，并使用rockydem完成了残膜包装过程的动态模拟和参数优化。结合单因素实验和响应面分析，探讨了包装腔角度、包装带类型、线速度和上带安装角度对包装完整性和紧凑性的影响规律。结果表明，三阶段装置的包装率达到了99.13%，薄膜密度为83.75千克/立方米，当包装腔方位角为30°、上带安装倾斜度为30°、线速度为2.3米/秒且使用粗糙带时。现场验证显示，残膜袋的平均密度为 91.4千克/立方米，与模拟预测的误差仅为 2.23千克/立方米。该装置的运行稳定可靠。在本研究中，通过结构创新和参数优化，开发出了一种高回收率且结构紧凑的残膜包装装置，为农田残膜的高效回收和污染控制提供了技术支持。