期刊论文

Xie, F.(hunanxie2002@163.com)

中文

农业工程学报

1002-6819

2013

29

5

12-18

10.3969/j.issn.1002-6819.2013.05.002

国家自然基金项目资助（编号:51175173）；

本校为第一且通讯机构

柔性脱粒能减少刚性脱粒冲击所带来的水稻籽粒破损, 对柔性脱粒的研究与应用早已引起了农机研究者的广泛关注。为了比较柔性齿滚筒与刚性齿滚筒脱粒水稻的功耗差异, 该文将脱粒滚筒视为刚体, 脱粒齿视为弹性体, 脱粒过程视为柔性脱粒齿对水稻籽粒的碰撞冲击过程, 通过分析比较刚性齿与柔性齿脱粒过程中冲量矩及对水稻籽粒打击力, 建立了刚性齿脱粒滚筒与柔性齿脱粒滚筒的功耗模型, 同时通过对刚性和柔性脱粒过程碰撞冲量和动能损失的分析比较, 从理论上证明了柔性齿脱粒相对于刚性齿脱粒具有动能损失小、功耗低。试验结果表明在喂入量相同情况下, 脱粒齿直径相同的刚性齿滚筒比柔性齿滚筒的转矩...

The study and use of flexible threshing teeth are of interest to researchers in agricultural mechanization because flexible teeth appear to damage grain less than rigid teeth. For a flexible threshing tooth, consisting of an elastic beam fixed on one end, a differential equation of its deformation curve was created, the deformation of which was calculated by numerical methods, which provided necessary condition for dynamic analysis. The corresponding formulation of calculating power consumption was deduced based on theoretic analysis in this paper. The hypothesis was as follows: the threshing ...