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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (14): 285-290.doi: 10.11924/j.issn.1000-6850.2014-2318

所属专题： 玉米

• 工程 机械 水利 装备 • 上一篇    

玉米种子与脱粒部件碰撞过程中的接触力学分析

张新伟1,2,易克传1,2,高连兴3   

  1. (1安徽科技学院机械工程学院,安徽凤阳 233100；2安徽省玉米育种工程技术研究院,安徽凤阳 233100；3沈阳农业大学工程学院,沈阳 110866）
  • 收稿日期:2014-08-25 修回日期:2015-04-13 接受日期:2015-03-04 出版日期:2015-06-02 发布日期:2015-06-02
  • 通讯作者: 张新伟
  • 基金资助:
    安徽科技学院博士启动基金(ZRC2013397)。

Contacting Mechanics Analysis during Impact Process between Corn Seeds and Threshing Component

Zhang Xinwei1,2, Yi Kechuan1,2, Gao Lianxing3   

  1. (1College of Mechanical Engineering, Anhui Science and Technology University, Fengyang Anhui 233100; 2Anhui Insitute of Corn Breeding Engineering and Technology, Fengyang Anhui 233100; 3College of Engineering, Shenyang Agriculture University, Shenyang 110866)
  • Received:2014-08-25 Revised:2015-04-13 Accepted:2015-03-04 Online:2015-06-02 Published:2015-06-02

摘要： 为进一步分析脱粒过程中玉米种子机械应力裂纹的产生机理，为新式种用脱粒机的研制提供理论支持，运用赫兹理论和材料力学分析了玉米种子产生机械脱粒损伤的临界速度，分析了脱粒部件与玉米种子的力学接触过程，并进一步比较了不同脱粒部件与玉米种子的碰撞过程。研究发现：玉米种子与脱粒部件相互接触时的相对运动速度大于Vz时，玉米种子将产生机械应力裂纹，甚至破碎；钉齿和板齿及其上不同部位对玉米种子的力学作用效果存在明显差异；玉米种子与脱粒部件的接触面积越大，受到的打击力就越大，且钉齿对玉米种子的打击力大于板齿的打击力。

关键词: 经济性状, 经济性状

Abstract: In order to further analysis mechanical stress crack formation mechanism of corn seeds during threshing process, provide theory support for the development of new maize seed sheller. In this paper, Hertz theory and mechanics of materials were used to analyses the critical velocity of corn seeds generated flex cracks, and the contacting process between corn seeds and threshing parts, and compared the collision process between spike tooth and plank tooth and maize seeds. It is shown that corn seeds would be producing mechanical stress cracks, even broken when the relative speed of corn seeds and threshing parts touch each other is greater than Vz; there are significant different mechanical effect between different threshing parts and different parts and corn seeds; contact area of corn seeds and threshing unit greater, the impact force received by corn seeds greater, and impact force of spike tooth greater than plank tooth.