旋耕埋草机立刀设计功能实现程度的分析  

Analysis on design functions realization degree of vertical blade for stubble burying rotary tiller

作　　者：张居敏[1] 夏俊芳[1] 贺小伟[1] 张甜[1] 张秀梅[1] 

机构地区：[1]华中农业大学工学院,武汉430070

出　　处：《华中农业大学学报》2014年第3期122-127,共6页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(51275196);公益性行业(农业)科研专项(201203059)

摘　　要：以1GMC-70型船式旋耕埋草机立刀为研究对象,分析立刀设计功能,建立立刀刃口函数曲线,并利用Matlab软件进行立刀运动学分析。结果表明:立刀当前的结构参数不能很好地与其设计功能相匹配,立刀对螺旋横刀切土节距的增加量小于螺旋横刀切土节距的1/3,立刀自身的秸秆切断效应以及辅助螺旋横刀处理秸秆等效应都比较弱;立刀对未耕土壤有破茬作用,但破茬深度约为垡片最大厚度的1/3,破茬效应较小;立刀对刀辊后方已耕土壤几乎没有碎土效应;立刀没有将垡条切断,它只切割了垡条横截面积的40%左右;立刀的4-3-4-3-4焊接排布方式没有增加自身作业机会。田间作业试验表明,旋耕埋草机是否设置立刀对作业效果没有区别,故在当前结构参数下立刀没有实现其设计功能,建议重新设计立刀。In this paper,the relationship between design purposes,functions and structure parameters for vertical blade of boat tractor 1GMC-70was analyzed.Mathematic equation of leading edge for the vertical blade was built.Vertical blade kinematics was analyzed by using software Matlab.The results show that the structure parameters of the vertical blade do not match well with its design intents. The effective cutting length of the vertical blade is less than one-third bite length of the helical blade,so its own cutting straw capability and the capability of helping helical blade to process straw are all weak. The vertical blade can break untilled soil in advance,but the cutting depth is only about one-third thickness of the helical blade′s furrow slice.Therefore,the effect of the vertical blade to break the untilled soil is small.The vertical blade can pulverize tilled soil clod behind rotor,but the effect is negligible. The vertical blade cuts only about 40% of the furrow slice′s cross sectional area,so its furrow slice breaking effect is small.The arrangement of vertical blades,which is 4-3-4-3-4,does not increase their own tillage opportunities.Field tests show that the existence of vertical blade has no impact on paddy field tillage quality.As a result,the vertical blade with current structure parameters does not achieve its design intents.It should be redesigned.

关 键 词：水田耕整 旋耕埋草机 立刀 设计 

分 类 号：S222.3[农业科学—农业机械化工程]