Authors

Abstract

To improve the ditching performance of high-firmness grassland, a bionic root cutter based on the contour curve model of Prosopocoilus astacoides' jaw was designed, as well as a grassland root-cutting and ditching device combining the bionic root cutter with the core-share opener. The grassland ditching experiment investigated the horizontal working resistance, ditching stability, and soil disturbance of the three ditching parts. According to the trial results, when the core-share opener was used for ditching in high-firmness grassland, the ditching stability was poor, the working resistance was high, and the grassland was severely damaged. Compared with the independent configuration of the core-share opener, the ditching performance can be significantly improved by installing a root cutter in front of the core-share opener, and the effect of installing the bionic root cutter was better than that of an ordinary triangular root cutter. When the ditching depth was 5cm, 10cm, and 15cm, the ditching stability coefficient of the root-cutting and ditching device increased by 16.67%, 9.54%, and 6.18%, respectively, the horizontal working resistance reduced by 58.73%, 28.15%, and 19.84%, respectively, and the soil disturbance area reduced by 30.58%, 23.73%, and 20.21%, respectively.

Abstract in Chinese

为提高高坚实度草地的开沟性能，依据前锹甲上颚轮廓曲线模型，设计了一种新型仿生切根刀，并研制了一种将仿生切根刀与芯铧式开沟器相组合的草地切根开沟装置。通过草地开沟试验，对三种开沟部件的水平工作阻力、开沟稳定性以及草地扰动情况进行了比较分析。试验结果表明，芯铧式开沟器在高坚实度草地进行开沟作业时，其开沟稳定性较差、耕作阻力较大，对草地破坏严重。相较于芯铧式开沟器单独配置，在其前方加装切根刀可以显著提升开沟性能，且加装仿生切根刀比普通三角切根刀的效果更佳；加装仿生切根刀的芯铧式开沟器在5cm、10cm、15cm开沟深度时的开沟稳定性系数分别提高了16.67%、9.54%、6.18%，水平工作阻力分别降低了58.73%、28.15%、19.84%，土壤扰动面积分别降低了30.58%、23.73%、20.21%。