Authors

Abstract

For rice ratooning, the lateral bud germination of the rice stubble after the first harvesting can be used to continue the next growing season, but the first harvesting machinery will crush and damage the rice stubble, resulting in the reduction of yield in the ratooning season. Righting the rolled stubble can reduce this loss, and thus a double-chain finger grain lifter was designed in this study. Then, a kinematic model and motion trajectory curve of the grain lifter was established. The influence law of the chain speed, chain spacing and the number of fingers of the rear righting chain was determined. Furthermore, taking into account the success rate and the rate of secondary damage of the righting, a full-factor bench test was performed. The best operating characteristics of the grain lifter are: chain speed of 345 r/min, adjacent chain spacing of 300 mm, and the number of gears and fingers on the rear righting chain of 3. The success rate and the secondary damage rate of the righting is 90.05% and 1.72%, respectively. A field verification test was conducted, with an average success rate of 55%. The results of this study can provide valuable reference for the righting technology of rolled rice stubble and promote the whole mechanized production of ratoon rice.

Abstract in Chinese

针对再生稻头季机械收获碾压稻茬导致再生季产量降低的问题，设计了一种再生稻机收碾压稻茬双层链排齿爪扶正装置，构建了扶正齿爪运动学模型及其运动轨迹曲线；确定了影响扶正装置工作性能的主要因素为链排转速、相邻链排间距和后扶正链排齿爪个数；进而以扶正成功率和扶正二次损伤率为评价指标，开展全因素台架试验，确定扶正装置最优工作参数组合为链排转速345r/min、相邻链排间距300mm和后扶正链排齿爪数3个，其扶正成功率为90.05%，扶正二次损伤率为1.72%；并开展了田间验证试验，田间平均扶正成功率为55%。本文研究结果可为再生稻机收碾压稻茬扶正装置研发提供参考。