穴播轮中种子运动高速摄像分析

为揭示种子在穴播轮圆桶形种子室中的运动规律,应用高速摄像分析技术研究脱绒棉种在不同情况下的运动,提出了种子临界深度概念.当种子深度小于临界深度值时,种子在种子室内圈上整体滑动不上升,大于临界深度值时,种子作环流运动;种子不沿种面下落则种子在种子室内圈上整体滑动,否则种子滑动上升,并作环流运动;种子整体滑动时穴播轮转速对种子的运动无影响;做环流运动的种子形成上、下2个带动层,2个带动层之间有中心区域;安装取种器后种子被带起,穴播轮转速大于105 r.min-1时,整个种子室内的种子在种子室内圈形成一个种子圆环.

High-speed photography analysis on seed movement in seed chamber of clamping dibber wheel

To reveal the regularity of cotton-seed movement in circular ring seed-chamber of clamping precision seeding dibber wheel,high-speed photography analysis technique was employed to analyze the pattern of detinted cotton-seed movement.The conception of seed critical depth was proposed through observing the seed movement in different circumstance.The seeds slide as a whole on the inner side of seed-chamber without any seed going up when the seed depth is less than critical depth value.In the opposite situation,a circulation movement of seed is obtained in seed-chamber.If the seeds do not fall along the seed surface,seeds will slide down along the inner ring as a whole without circulation movement,or it will rise up along the inner ring with circulatory motion in seed-chamber.Seeds with circulation movement are divided into two driving layers with a seed center zone between the two seed layers.Equipped with dibbler,rotating seeds are brought up at inner side in seed-chamber,and a seed ring appears when the rotating speed of the dibbler is over 105 r·min-1.