High-peed photography analysis on seed movement in seedchamber of clamping dibber wheel
1.College of Mechanical and Electrical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China; 2.College of Mechanical and Electrical Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China
Abstract：Abstract: 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 seedchamber. 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 seedchamber, and a seed ring appears when the rotating speed of the dibbler is over 105 r·min-1.
2012, Vol. 33 
