基于EDEM的离心式排种器排种性能数值模拟  

Numerical Simulation on Seeding Performance of Centrifugal Rape-seed Metering Device Based on EDEM

作　　者：廖庆喜[1] 张朋玲[1] 廖宜涛[1] 余佳佳[1] 曹秀英[1] 

机构地区：[1]华中农业大学工学院,武汉430070

出　　处：《农业机械学报》2014年第2期109-114,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51275197);国家油菜产业技术体系专项资助项目(CARS-13);'十二五'国家科技支撑计划资助项目(2010BAD01B06);中央高校基本科研业务费资助项目(2011PY021)

摘　　要：建立了离心式排种器的离散元仿真模型,对离心式排种器工作过程中油菜籽的运动过程进行了仿真分析,确定了油菜籽的运动规律并研究了内锥筒中种量与临界转速的关系、排种器转速与总排量的关系。仿真结果表明:随着内锥筒中的种子质量增多,临界转速呈递减趋势,而随着转速的增加,总排量呈增加趋势。仿真与台架试验验证结果一致,表明采用离散元法分析离心式排种器性能是可行的。The discrete element method （DEM） simulation model of centrifugal metering device was established, and the simulation analysis was conducted on the motion processes of rapeseeds during the centrifugal metering device working. The law of rapeseeds movement was determined, and the relationships between rapeseeds weight inside the cone and critical speed, rotational speed and seeding quantity were also studied, respectively. The simulation results showed that with the increase of rapeseeds weight in the cone, the critical speed had a decreasing trend, and the seeding quantity had an increasing trend with the increase of rotational speed. The simulation results were consistent with the test results. It showed that using DEM to analyze the performance of the centrifugal metering device was feasible.

关 键 词：离心式排种器 EDEM 数值模拟 

分 类 号：S223.2[农业科学—农业机械化工程]