钉齿式轴流装置脱粒过程高速摄像分析

以自行研制的钉齿式轴流脱粒与分离装置为研究对象,借助高速摄像设备对脱分空间内稻谷的整体运动过程、断穗的运动和脱粒过程以及自由籽粒的运动过程进行了在线拍摄。通过高速摄像图像慢放分析得出：稻谷进入脱分空间后,错综复杂地交织在一起,在旋转钉齿和导向板的共同作用下,稻谷流沿滚筒轴向螺旋向前涌动。脱分空间内断穗的运动轨迹是抛物线,其运动不平稳,速度容易出现波动。单个自由籽粒在无外界干扰时近似作匀速直线运动,运动方向与滚筒轴线方向呈一定夹角。

High-speed Photography Analysis of Threshing Process on Axial Flow Device with Nails Teeth

Taking a self-developed axial flow threshing and separating device with nails teeth as the research object, the overall process of movement, broken rice spike movement and threshing process as well as the movement process of free kernel were photographed on line in threshing and separating space by using the high-speed photography equipment. Through the slow playing analysis of high-speed video image, it could be concluded that when the rice entered into the threshing and separating space and interweaved together, the valley logistics along the axial spiral surging moved forward under the combined action of the rotary nail teeth and guide plate. The trajectory of broken ear was a parabola and presented to be unstable and fluctuate. Single free kernel without external interference followed approximately a uniform linear motion. Its motion direction formed a certain angle with the drum axis direction.