精量播种用种子带覆膜压辊形状和轴向力分布  

Axial Force Distribution and Compression Rollers Shape of Precision Seeding Belt

作　　者：王典[1] 刘晋浩[1] 王建利[1] 吕光辉[1,2] 魏占国[3] 魏超[1] 

机构地区：[1]北京林业大学工学院,北京100083 [2]国家林业局科技司,北京100714 [3]中南林业科技大学物流学院,长沙410004

出　　处：《农业机械学报》2011年第12期88-91,132,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家林业局林业公益行业科研专项资助项目(201104007)

摘　　要：为提高窝眼轮式精量播种机压制种子带的质量,对覆膜压辊在负荷作用下其挠度变化对轴向压制力分布和大小的影响进行了研究。采用理论假设求解中高的方法,对覆膜压辊挠度变化进行补偿。通过试验测定,最优覆膜压力f为45～160 N。计算出覆膜钢辊两端施加的压制力F为3 405 N,通过差分与迭代计算确定采用抛物线补偿的覆膜压辊中高m为0.35 mm。采用试验方法测定两辊接触面沿轴线长度方向特征点的压力,结果表明两辊之间压力大小和分布情况与理论计算结果基本相同,种子带压制质量良好。For improving the pressing quality of seed belt made by the pressing rollers of the precision sowing apparatus,the influences affected by the change of the deflection of rollers on the pressing force were researched.And then,the change of the deflection was compensated with the method of setting crown,while the valve of the crown was solved by the theoretical calculation.After that,the optimum pressing force was measured in the test,and the range of which is from 45 N to 160 N.So,the force inflicted on the two sides of the roller was calculated as 3 405 N.Then,with the difference and iterative calculation,the valve of the crown was set to 0.35 mm.In the final,the force valves of the certain points along the rollers were tested in the experiment.The results showed that the valves and the distribution of the forces between the two rollers were basically same as theoretical analysis,and the effect of seed belt was good enough to pave in the woodland.

关 键 词：精量播种 种子带 覆膜压辊 挠度补偿 

分 类 号：S776.22[农业科学—森林工程]