切纵流联合收获机田间小麦收获最优路径与速度试验

为研究切纵流联合收获机田间小麦收获时的最优行走路径和最佳前进速度,分析了割台宽度为4.75m的切纵流联合收获机在田间收获小麦时的3种典型路径,并从收获拐弯换向耗时最小的角度进行了理论推导,在田间进行前进速度与籽粒总损失速率之间的试验并建立数学模型,在室内依据等效喂入量进行前进速度与脱粒分离总功耗之间的试验并建立数学模型,得出最佳前进速度的数学模型。结果表明,切纵流联合收获机在田间应采用回转式收获路径,当前进速度为小于等于1.0m/s时,等效喂入量为小于等于7.79kg/s,籽粒总损失速率为小于等于19.33g/s,籽粒总损失率为小于等于0.609%,切纵流脱粒分离部分总功耗为小于等于83.94kW。

Optimal Path and Travel Speed of Tangential-axial Combine Harvester for Wheat

In research of the optimal walking path and best travel speed of the tangential-axial combine harvester in the field wheat threshing and separating, three typical walking paths of tangential-axial combine harvester which header width was 4.75m were analyzed. It also derived from the point of the minimum consumption of time when combine harvester turned direction at the end of the field. Experiments of the relationship between grain loss rate and the travel speed were conducted, and the mathematical model was established. So were experiments of the relationship between threshing-separating consumption power and the travel speed, and the mathematical model. Based on these experiments and mathematic model, the best travel speed formula was derived. It turned out that rotary walking path should be used to harvest the wheat by the tangential-axial combine harvester. When the harvesting travel speed was less than 1.0 m/s, the equivalent feed rate was less than 7.79kg/s, the total grain loss rate was less than 19.33g/s (that was 0.609%), and the total power consumption of the threshing-separating equipment was less than 83.94kW.