CAJ | 학술논문

为优化差速式玉米种子脱粒机脱粒系统的有关参数,进而降低玉米种子在脱粒过程中的损伤,采用高速摄影方法对单个玉米果穗喂入与脱粒过程进行了观察分析.分析结果表明:果穗在开始喂入阶段,籽粒破碎大;在脱粒起始阶段,果穗撞击强烈,越到后段,撞击越弱;果穗在正常脱粒情况下,脱下籽粒多,籽粒运动轨迹可近似为沿直辊与果穗接触点的切线方向;而果穗非正常脱粒情况下,脱下籽粒少,籽粒运动规律呈杂乱状态,没有一定飞行方向;螺旋辊的转速偏大造成果穗的非正常脱粒加大,果穗的非正常脱粒会影响果穗的脱粒质量和脱粒效率.
위우화차속식옥미충자탈립궤탈립계통적유관삼수,진이강저옥미충자재탈립과정중적손상,채용고속섭영방법대단개옥미과수위입여탈립과정진행료관찰분석.분석결과표명:과수재개시위입계단,자립파쇄대;재탈립기시계단,과수당격강렬,월도후단,당격월약;과수재정상탈립정황하,탈하자립다,자립운동궤적가근사위연직곤여과수접촉점적절선방향;이과수비정상탈립정황하,탈하자립소,자립운동규률정잡란상태,몰유일정비행방향;라선곤적전속편대조성과수적비정상탈립가대,과수적비정상탈립회영향과수적탈립질량화탈립효솔.
I n order to optimize parameters of threshing system of seed corn thresher with different speeds threshing parts, and to decrease mechanical damage of corn seed kernel in the course of threshing, the process of feeding and threshing origination of single seed corn ear was analyzed by using high-speed photograph method. The testing results show that damage rate of kernels subjected intense impact is large in the feeding origination of seed corn ear; with threshing, impact changes more and more feeble, and damage rate of kernels becomes smaller and smaller too. Under state of ordinal threshing, large amounts of kernel is threshed and the moving track of threshed kernel follows the tangent direction of contacting dot of straight roller and ear, while under state of out-of-order threshing, the amount of kernel is small and the moving of threshed kernel presents disordering. Furthermore, large rotating speed of spiral roller results in the larger out-of-order threshing of ear, which influences the threshing quality and threshing efficiency of seed corn ear.