湖南农业大学学报（自然科学版）2024，Vol.50Issue(1)：71-78,8.DOI:10.13331/j.cnki.jhau.2024.01.011
基于刚柔耦合的水稻脱粒滚筒仿真分析与试验
Simulation analysis and experiment of rice threshing drum based on rigid flexible coupling
摘要
Abstract
In order to reduce the grain crushing rate and improve the cleanliness in the process of rice harvesting,three types of threshing elements,namely rod teeth,bow teeth,and cutter teeth,were designed based on the longitudinal axial flow differential segmented threshing drum.By changing the contact state between the surface of the threshing element and the grain during collision,six types of threshing rollers were obtained by rigid flexible coupling.Based on the impulse momentum theorem,the collision process between grains was analyzed.Through simulation experiments,it was found that the average normal force on grains was 28.4 N and 22.3 N,and the average tangential force on grains was 14.43 N and 8.74 N,respectively,when the rigid rod teeth and the rigid flexible coupling rod teeth came into contact with rice grains.Three-factor and three-level orthogonal test was carried out by taking the tooth shape of front roller,the rotation speed of the front roller and the rotation speed difference between the front and rear rollers as influencing factors,and the broken rate and undrained rate of rice as evaluation indexes.The test results show that the rotation speed difference between the front and rear rollers and the tooth shape of the front roller have the greatest influence on the broken rate and the un-threshing rate,respectively.The optimal combination obtained from the experiment is that the tooth shape of the front roller is bow tooth,the rotation speed of the front roller is 600 r/min,and the rotation speed difference between the front and rear rollers is 100 r/min.Compared with rigid threshing components,the average grain broken rate of rice can be reduced by 18.5%.关键词
水稻脱粒/差速滚筒/脱粒元件/刚柔耦合/破碎率/未脱净率Key words
rice threshing/differential speed roller/threshing component/rigid flexible coupling/broken rate/un-threshing rate分类
农业科技引用本文复制引用
侯杰,王修善,谢方平,刘大为,陈志刚..基于刚柔耦合的水稻脱粒滚筒仿真分析与试验[J].湖南农业大学学报（自然科学版）,2024,50(1):71-78,8.基金项目
湖南省高新技术产业科技引领计划项目(2020NK2002) （2020NK2002）
湖南省农机装备与技术创新研发项目(湘财农指[2021]47号、湘财农指[2020]107号) （湘财农指[2021]47号、湘财农指[2020]107号）
