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      2. 油菜種床整備開畦溝仿靴形銳角開溝犁設計與試驗
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        華中農業大學工學院

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        國家油菜產業技術體系專項(CARS-12)、湖北省自然科學基金(2019CFB153)和湖北省農業科技創新行動項目


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

          針對長江中下游土壤黏重板結、含水率波動大及前茬水稻秸稈留存量大的復雜工況和油菜種植需開畦溝的生產要求,研制了油菜機械直播種床整備開畦溝仿靴形銳角開溝犁。選擇平滑拋物線作為滑切刃口曲線,開展了仿靴形銳角開溝犁三面楔建模和犁體與土壤相互作用動力學分析,確定了滑切刃口曲線的滑切角范圍為23°~67°、犁體入土角為30°、犁尖張角為60°,擋土板的長度為400mm,翼板傾角為40°~79.2°。田間試驗表明,仿靴形銳角開溝犁可開出溝寬為200~400mm、溝深為175~250mm的梯形溝,溝寬及溝深穩定性均達90%以上,且翼板傾角為46°、開溝深度為183mm、作業速度為0.6m/s時,開溝作業效果滿足油菜種植農藝要求,為油菜種床整備開畦溝裝備設計提供了參考。

          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
        • 錄用日期:2020-05-25
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