DESIGN AND EXPERIMENTAL STUDY ON A CORN PICKING DEVICE BASED ON THE FRACTURE MECHANICS OF CORN PEDUNCLE
文献类型： 外文期刊
第一作者： Fu, Qiankun
作者： Fu, Qiankun;Fu, Jun;Chen, Zhi;Ren, Luquan;Fu, Qiankun;Fu, Jun;Fu, Jun;Ren, Luquan;Chen, Zhi
作者机构： Jilin Univ, Coll Biol & Agr Engn, Changchun, Jilin, Peoples R China;Jilin Univ, Key Lab Efficient Sowing & Harvesting Equipment, Minist Agr & Rural Affairs, Changchun, Jilin, Peoples R China;Jilin Univ, Key Lab Bion Engn, Minist Educ, Changchun, Jilin, Peoples R China;Chinese Acad Agr Mechanizat Sci, Beijing, Peoples R China
关键词： . Corn earpicking; Corn harvest; Corn harvester header; Fracture force; Fracture mechanics; Grain loss; Power consumption
期刊名称：JOURNAL OF THE ASABE
ISSN： 2769-3295
年卷期： 2023 年 66 卷 5 期
收录情况： SCI
摘要： In corn ear picking, the corn peduncles are fractured under pure tensile forces. The large force demands in the fracture brought severe grain loss, an enormous instantaneous load, and high power consumption in the corn harvest. In this paper, the fracture behavior of the corn peduncles under different tensile orientations was studied. It showed the fracture force of corn peduncle could be reduced by more than 80% when its fracture mode transformed from tensile fracture to bending fracture as long as the corn ear was deflected to the critical angle of 55 degrees. Based on this, a corn picking device was designed to reduce peduncle fracture force by deflecting corn ears to the critical angle. The optimal parameters of the designed corn picking device were determined as follows: the diameter of the snapping rollers was 20 mm, the rotating speed of the stalk rolls was 700 rpm, and the inclination angle of the corn picking unit was 28.3 degrees. A comparative test between the designed corn picking device and a commonly used corn picking device was performed. It showed the designed corn picking device could reduce grain loss, average power consumption, and peak power. This study will provide a theoretical basis and design reference for corn harvester design to reduce grain loss and power consumption.
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