To address technical bottlenecks such as insufficient seed-filling force, arching of sugarcane seed pieces, and poor filling uniformity in the seeding mechanism of a pre-cut sugarcane planter, a chain-trough belt composite seed arrangement mechanism was designed. The mechanism comprised modular components including a chain-trough conveying assembly, a polyvinyl chloride (PVC) friction belt, and a seed storage bin. The mechanism improved the driving force for seed filling by introducing a friction belt structure, solved the problem of arching and blockage, and enhanced the adaptability of the seed metering device to the morphology of sugarcane seed stems. The working principle of the seeding mechanism was systematically explained, and based on theoretical analysis, the core factors affecting seeding performance were identified as chain groove linear velocity, friction belt inclination angle, and friction belt linear velocity. The EDEM (engineering discrete element method) software, based on the discrete element method, conducted single-factor simulation experiments to reveal the influence patterns of various parameters on the seed filling qualification index and the missing filling index. Furthermore, the interaction between parameters was quantitatively analyzed through orthogonal experiments using the response surface method (box Behnken, BBD). The results show that the linear velocity of the sugarcane trough is the primary influencing factor. The optimal parameter combination is a friction belt inclination angle of 59.84°, a friction belt linear velocity of 0.63 m/s, and a sugarcane trough linear velocity of 0.10 m/s. Under these conditions, the filling qualification index of the simulation model reaches 99.01%, and the missing filling index is only 0.99%. Bench test results indicate that the average filling qualification index of the mechanism is 94.8%, and the missing filling index is 5.2%, verifying that the proposed composite seeding mechanism has good operational performance.
LIU Jiao-di, CHEN Jian-long, XING Yi-hao, XU Hong-zhen, DENG Xi-shi, DU Xiao-long.
Design and Experiment of the Chain-trough Belt Type Composite Seed Arrangement Mechanism for Pre-cut Sugarcane[J].
Science Technology and Engineering, 2026, 26(12): 4979-4990 DOI:10.12404/j.issn.1671-1815.2504213
为明确摩擦带倾角、摩擦带线速度和蔗槽线速度三因素参数范围,进行基于离散元法的EDEM(engineering discrete element method)单因素仿真试验。以新台糖44号双芽段蔗种为参考,采用多球聚合模型,按照平均直径、长度尺寸建立蔗种的颗粒模型,如图10所示。
为减少仿真过程计算量,将链槽简化为水平移动的足够长的蔗槽带,使用SolidWorks三维建模软件对蔗槽进行建模后转为IGS格式导入EDEM中,通过软件中Add Kinematic模块的Add Linear Translation功能实现蔗槽的水平移动动作。摩擦带和挡板则简化为一平面,利用仿真软件自带的建模功能按实际尺寸建立并添加相应的离散元仿真参数[20],具体如表1所示。
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