Authors

Abstract

In this study, a double-shaft type sweet potato rice-planting and rice-returning machine was designed. The structure of the whole machine as well as the key components were analyzed, and the influence of each factor on the operation quality was studied. The results of the study showed that the order of the influence of each factor on the length of broken stems and leaves and the rate of checking was as follows: roller speed > toggle clearance > toggle spacing; the order of the influence on the stubble height was as follows: toggle clearance > roller speed > toggle spacing; and the order of the influence on the rate of injury to potatoes was as follows: roller speed = toggle clearance = toggle spacing. The optimal combination of working parameters in the field test was 1944 r/min for roll speed, 132 mm for toggle spacing, and 20 mm for toggle clearance, at which the qualification rate of stem and leaf breaking length was 94.32%, stubble height was 33.61 mm, and potato injury rate was 0.26%. The relative error with the theoretical optimization value is between 0.13% and 7.14%, which meets the operational requirements of sweet potato rice transplanter.

Abstract in Chinese

本研究设计了双轴式甘薯打秧还田机。分析了整机结构以及关键部件，并研究了各因素对作业质量的影响。研究结果表明:各因素对茎叶打碎长度及格率的影响顺序为杆辊转速>拨杆离地间隙>拨杆间距，对留茬高度的影响顺序为拨杆离地间隙>杆辊转速>拨杆间距，对伤薯率的影响顺序为杆辊转速=拨杆离地间隙=拨杆间距。田间试验最优工作参数组合为杆辊转速1944 r/min、拨杆间距132 mm、拨杆离地间隙20 mm，此时茎叶打碎长度合格率为94.32%、留茬高度为33.61 mm、伤薯率0.26%。与理论优化值的相对误差在0.13%~7.14%之间，满足甘薯打秧机的作业需求。