摘要
针对小麦气送式集排器供种装置充种环节种子流动性差,导致充种及供种不稳定的问题,设计了一种具有等宽多边形槽齿轮的小麦供种装置。阐述了供种装置的工作原理,确定了等宽多边形槽齿轮的主要结构参数。利用EDEM仿真对比分析了不同结构型式槽齿轮对种群扰动能力、充种及供种性能的影响,结果表明,当供种轴转速为20 r/min时,在仿真的1~10 s内随等宽多边形槽齿轮边数的增加,种群平均动能均值逐渐减小,对种群平均扰动能力依次减弱,但相邻平均动能峰值间隔时间缩短,扰动种群的频率增加;等宽三边形、等宽五边形、等宽七边形、等宽九边形槽齿轮扰动下种群平均动能均值比圆形槽齿轮分别高371.32%、209.23%、91.02%、53.37%;以充种合格率((2±1)粒/孔)和漏充率(0粒/孔)为指标,等宽七边形槽齿轮充种合格率为93.98%、漏充率为2.78%,供种粒数与供种时间具有较高的线性度,充种和供种性能较优。台架试验验证了等宽七边形槽齿轮式供种装置的供种性能及对排种性能的影响,结果表明,当转速为10~60 r/min时,供种速率稳定性变异系数不高于2.14%,供种时破损率不高于0.20%,总排量稳定性变异系数不高于2.15%,排种时破损率不高于0.23%,满足小麦种子稳定供种要求。
Considering the problem that the wheat seeds have poor fluidity in the seed filling link of the seed feeding device of air-assisted centralized metering device for wheat,which leads to unstable seed filling and feeding,a seed feeding device with constant width polygon groove-tooth wheel for wheat was developed.The working principle of the seed feeding device was described.The main structural parameters of the constant width polygon groove-tooth wheel were determined.The effects of different structure types of groove-tooth wheel on seed population disturbance ability,seed filling and seed feeding performance were compared and analyzed by EDEM.The simulation results showed that when the rotating speed of the seed feeding shaft was 20 r/min,with the increase of side quantity of the constant width polygon groove-tooth wheel,the average kinetic energy of the seed population was gradually decreased,and the average disturbance ability to the seed population was decreased in turn.Nevertheless,the interval between the adjacent average kinetic energy peaks was decreased and the frequency of disturbing the seed population was increased.The average kinetic energy of the seed population under the disturbance of the constant width triangular,the constant width pentagonal,the constant width heptagonal,and the constant width nonagon groove-tooth wheel was 371.32%,209.23%,91.02%,and 53.37%higher than that of circular groove-tooth wheel,respectively.Taking the quality rate of seed filling((2±1)grain/hole)and missing rate of seed filling(0 grain/hole)as indicators,the quality rate of seed filling and missing rate of the constant width heptagonal groove-tooth wheel were 93.98%and 2.78%,respectively.The seed feeding quantity and seed feeding time had high linearity,and the seed filling and seed feeding performance were better.The bench test verified the seed feeding performance of the seed feeding device with the constant width heptagonal groove-tooth wheel and the effect of seed feeding device on seeding performance.The results showed that when the rotating speed was 10~60 r/min,the variation coefficient of seed feeding rate stability was not higher than 2.14%,the damage rate was not higher than 0.20%during feeding process,the variation coefficient of total seeding mass stability was not higher than 2.15%,the damage rate was not higher than 0.23%during seeding process,which met the requirements of stable wheat seed feeding.
作者
王磊
舒彩霞
席日晶
廖庆喜
刘嘉诚
廖宜涛
WANG Lei;SHU Caixia;XI Rijing;LIAO Qingxi;LIU Jiacheng;LIAO Yitao(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River,Ministry of Agriculture and Rural Affairs,Wuhan 430070,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2022年第8期53-63,共11页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2021YFD2000403)
国家自然科学基金项目(51975238)
中国博士后科学基金项目(2021M701340)
关键词
小麦
气送式集排器
供种装置
等宽多边形槽齿轮
wheat
air-assisted centralized metering device
seed feeding device
constant width polygon groove-tooth wheel
作者简介
王磊(1988—),男,博士后,主要从事油菜和小麦播种技术与装备研究,E-mail:wangchong12356@126.com;通信作者:廖宜涛(1982—),男,教授,博士生导师,主要从事现代农业装备设计与测控研究,E-mail:liaoetao@mail.hzau.edu.cn
