基于离散元法的棉花窝眼式穴播器排种性能模拟与试验  

Simulation and Experiment for Seeding Performance of Socket Cotton Dibbler Based on Discrete Element Method

作　　者：王龙 贺小伟[1,2] 胡灿 石露[1,2] 王旭峰 何义川 汤智辉[3] Wang Long;He Xiaowei;Hu Can;Shi Lu;Wang Xufeng;He Yichuan;Tang Zhihui(College of Mechanical and Electronic Engineering,Tarim University,Alar 843300,China;The Key Laboratory of Modern Agricultural Engineering in the Ordinary Colleges and Universities of Xinjiang,Alar 843300,China;Machinery Equipment Research Institute,Xinjiang Academy of Agricultural and Reclamation Science,Shihezi 832000,China)

机构地区：[1]塔里木大学机械电气化工程学院,新疆阿拉尔843300 [2]新疆维吾尔自治区普通高等学校现代农业工程重点实验室,新疆阿拉尔843300 [3]新疆农垦科学院机械装备研究所,新疆石河子832000

出　　处：《农机化研究》2021年第1期151-156,共6页Journal of Agricultural Mechanization Research

基　　金：国家重点研发计划项目(2016YFD0200604,2016YFD02006040102);塔里木大学校长基金项目(TDZKQN201803)。

摘　　要：窝眼式棉花精密穴播器因其结构简单、运行稳定等特点在新疆南疆地区广泛使用。为了研究棉花窝眼式穴播器转速对排种性能的影响,对穴播器结构和排种过程进行了分析,基于离散元法建立了包衣棉种的颗粒模型,并运用EDEM软件对穴播器在10、20、30r/min转速下棉种颗粒的运动过程进行了仿真。仿真结果表明:在取种过程中,棉种颗粒的运动速度在进入取种孔时达到最大,相比而言转速为10r/min时取种更容易,同时会造成重播现象。设计了试验装置,进行了相同转速下穴播器的排种性能试验,结果表明:在转速为10r/min时,穴播器排种率和重播率高;在转速为30r/min时,穴播器重播率和排种率低;在转速为20r/min时,穴播器排种率高且重播率低。研究结果可为南疆地区窝眼式棉花穴播器的优化和使用提供参考。Socket cotton dibblers are widely used in South-Xinjiang because of its simple structure and stable operation.In order to study the effect of the rotation speed of the socket cotton dibbler on the seed performance,the structure and seeding process of the dibbler were analyzed.The particle model of coated cotton was established based on the discrete element method,and the movement process of cotton seed particles was simulated at 10rpm,20rpm and 30rpm of dibbler by EDEM software.The simulation results show that,the movement speed of cotton seed reaches the maximum when entering the seed hole.When the rotation speed is 10rpm,it is easier to pick up seeds,and it will cause reseeding phenomenon.Then the experiment device was designed and the seeding performance was tested at the same speed.The test results show that,When the rotating speed was 10rpm,both of the seeding and reseeding rate of the dibbler were high.When the rotating speed is 30 rpm,both of the seeding and reseeding rate of the dibbler were low.Only when the rotating speed is 20 rpm,the seeding rate was high and the reseeding rate was low.The results will provide a reference for the optimization and use of socket cotton dibbler in South-Xinjiang.

关 键 词：窝眼式穴播器 排种性能 离散元法 仿真 

分 类 号：S223.2[农业科学—农业机械化工程] S220.3[农业科学—农业工程]