摘要
玉米果穗分配器是玉米收获机中剥皮机的重要组成部分,直接决定了玉米果穗的分配效果和剥皮胶辊的使用寿命。针对设施蔬菜收获劳动强度大和成本高等问题,结合目前我国设施蔬菜收获的机械化和全自动化程度低的现状,设计了一台多槽连续自动收获机,可实现设施蔬菜聚拢拔起、夹持输送、根茎切除全自动一体化收获。首先,阐述了设施蔬菜收获机整机结构设计及工作原理,根据成熟蔬菜的几何参数完成了关键机构的设计;然后,探索通过离散元的方法进行切割过程仿真试验与分析,搭建了刀具-蔬菜摩擦因数测试平台,对刀具与蔬菜根茎间的动、静摩擦因数进行测量,最终建立了离散元蔬菜切割模型。进行样机试验并结合正交试验方法对刀具的结构及运动参数进行优化,结果表明:切割刀具所对应的最佳结构及运动参数为双刀片距3mm、刀片转速800r/min、辅助固定刀片刀尖角度18°。
Aiming at the problems of high labor intensity and high cost of facility vegetable harvesting,combined with the current situation of my country's facility vegetable harvesting mechanization and low degree of full automation,a multi-slot continuous automatic harvester was designed,which can realize facility vegetables gathering,pulling,clamping and conveying.Rhizome removal is fully automated and integrated harvesting.Firstly,the whole machine structure design and working principle of the facility vegetable harvester are explained.The key mechanism design is completed according to the geometric parameters of mature vegetables.The simulation experiment and analysis of the cutting process are explored through the discrete element method,and the tool-vegetable friction coefficient is built.The test platform measures the dynamic and static friction coefficients between the knife and vegetable roots,and finally establishes a discrete element vegetable cutting model.Carry out prototype test and optimize the structure and motion parameters of the cutter in combination with the orthogonal test method.The best structure and motion parameters corresponding to the cutting tool are obtained as the dual blade distance 3mm,the blade speed 800r/min,and the auxiliary fixed blade tip angle 18°.
作者
高国华
赵韦东
梁永志
田钰瑄
Gao Guohua;Zhao Weidong;Liang Yongzhi;Tian Yuxuan(College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Beijing 100124,China;Guangdong Welling Motor Manufacturing Corporation,Fushan 528311,China)
出处
《农机化研究》
北大核心
2023年第1期41-50,共10页
Journal of Agricultural Mechanization Research
基金
国家重大研发计划项目(2l001014201701)。
