摘要
以螺旋叶片、板齿组合式轴流脱粒与分离装置为研究对象,借助高速摄像技术对稻谷的脱粒过程和脱粒后籽粒的运动方式进行了观察,通过观察分析可知,籽粒在脱粒部件梳刷、冲击、碰撞及物料之间相互搓擦的作用下,从枝梗上分离下来,期间稻穗呈环扣状,籽粒以环扣为中心向四周散射。稻谷进入脱粒空间后迅速形成薄层,并在脱粒部件和导向叶片的联合作用下,旋转向前涌动。当稻谷层受到冲击和梳刷作用时,瞬间被压缩,随之被抛离,呈蓬松状态,使被脱下的籽粒有机会穿过蓬松茎秆层分离出去。
The process of threshing of paddy and motion manner of threshed kernels by the assembled of plank-tooth and helical vanes of axial flow threshing and separating installation was photographed on line by the high-speed photography. By observing and analyzing the reproduction of the pictures of photographed the kernels were separated from the branch with stripping, impacting, compacting, colliding by the threshing units and rubbing of the material. The rice panicle was in ring form during the threshing period and the kernels scattered from center about the ring. The paddy came into being the thin layer rapidly, rotated and surged ahead under the joint action of the threshing parts and the guide blades as they entered the, threshing space. The paddy layer was compressed instantly as it subjected stripping and rubbing and was thrown away assuming a fluffy state soon after. It made the threshed kernels have the chance to separate from the fluffy stalk layer.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第5期52-55,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
高等学校博士学科点专项科研基金资助项目(项目编号:20060223001)
关键词
联合收获机
水稻
轴流脱粒与分离装置
高速摄像
Combine, Paddy, Axial flow threshing and separating installation, High-speedphotography
