油菜种床整备开畦沟仿靴形锐角开沟犁设计与试验
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华中农业大学工学院

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国家油菜产业技术体系专项(CARS-12)、湖北省自然科学基金(2019CFB153)和湖北省农业科技创新行动项目


Design and Experiment of Rape Seedbed Preparation Ditch with Boot-like Acute Angle Groove Plough
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    摘要:

    针对长江中下游土壤黏重板结、含水率波动大及前茬水稻秸秆留存量大的复杂工况和油菜种植需开畦沟的生产要求,研制了油菜机械直播种床整备开畦沟仿靴形锐角开沟犁。选择平滑抛物线作为滑切刃口曲线,开展了仿靴形锐角开沟犁三面楔建模和犁体与土壤相互作用动力学分析,确定了滑切刃口曲线的滑切角范围为23°~67°、犁体入土角为30°、犁尖张角为60°,挡土板的长度为400mm,翼板倾角为40°~79.2°。田间试验表明,仿靴形锐角开沟犁可开出沟宽为200~400mm、沟深为175~250mm的梯形沟,沟宽及沟深稳定性均达90%以上,且翼板倾角为46°、开沟深度为183mm、作业速度为0.6m/s时,开沟作业效果满足油菜种植农艺要求,为油菜种床整备开畦沟装备设计提供了参考。

    Abstract:

    In view of the complex production conditions of heavy soil compaction in the middle and lower reaches of the Yangtze River, large fluctuations in water content, and large remaining rice straw residues, and the production requirements of rapeseed cultivation for rapeseed cultivation, an imitation shoe-shaped ditching plough used in combination with a driven plough combined rotary tiller was developed. According to the principle of the guide curve of the plow body and the modeling analysis of the three-sided wedge, a smooth parabola is selected as the sliding cutting edge curve, and the sliding angle of the sliding cutting edge curve is determined to range from 25 ° to 65 °, and the plough body entry angle is 30°. The opening angle of the plow tip is 60 °. Through the dynamic analysis of the interaction between the shoe-like sharp-angle ditch plow and the soil, the length of the fender is 400mm, and the inclination of the wing is 40 °~79.2 °. Field tests have shown that a shoe-like sharp-angle ditching plough can produce a trapezoidal ditch with a ditch width of 200~400 mm and a ditch depth of 175~250 mm. The ditch width and ditch depth stability are both above 90%, and the ditch bottom is flat. The ditch shape is obvious, when the inclination of the wing is 46 °, the ditch depth is 183mm, and the working speed is 0.6m/s, which meets the agronomic requirements of rapeseed planting, and provides a reference for the equipment design of the furrow ditch for rapeseed bed preparation

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  • 收稿日期:2020-04-23
  • 最后修改日期:2020-05-23
  • 录用日期:2020-05-25
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