摘要
以接触力学为基础,建立了脱粒元件与稻谷对心碰撞时压缩位移和最大压力分布模型。针对不同含水率时稻谷塑性、脆性力学性质的差异,得出了稻谷与脱粒元件冲击损伤临界速度计算公式。对钉齿与镇稻10号、武香粳14、淮稻9号、镇糯653和协优084稻谷冲击损伤临界速度进行了实例计算,在试验台架上进行了实测,试验均值与理论计算基本一致。
Impact damage is the main form of rice threshing and one of the significant causes of rice injury. Based on the contact mechanics, models of the compressed displacement and the largest pressure distribution were established, as the threshing component centrally collided with a rice kernel. Due to the difference of moisture content, rice kernels plastic mechanics and brittle mechanics were different. The critical speed formula about impact damage was obtained as the rice kernel collided with the threshing element. Furthermore, the critical speed was calculated for the impact damage as to the spike tooth and the rice of zhendao10, wuxiangjingl4, huaidao9, zhennuo653 and xieyou084. Besides, experimental study was performed on the test platform which proved that the experimental mean value was by and large in according with the theoretical calculation.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2009年第8期54-57,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50475123)
江苏大学国家重点实验室培育点开发基金资助项目(NZ200706)
关键词
水稻谷粒
冲击
损伤
临界速度
脱粒
Rice kernel, Impact, Damage, Critical speed, Threshing
