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玉米條帶少耕作業(yè)驅(qū)動(dòng)式破茬刀設(shè)計(jì)與試驗(yàn)
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國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFD0300803)


Design and Experiment of Driving Stubble Cutter for Corn Strip with Less Tillage Operation
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    摘要:

    針對(duì)東北玉米壟作區(qū)耕整地動(dòng)土量大和春季降雨量低時(shí)土壤墑情不佳、耕作阻力大等問題,,提出一種條帶式少耕的作業(yè)方式,,并設(shè)計(jì)了驅(qū)動(dòng)式破茬刀。通過對(duì)驅(qū)動(dòng)式破茬刀的作業(yè)工況進(jìn)行受力分析得出,,當(dāng)破茬刀的滑切角大于或等于與其接觸的根茬或土壤的摩擦角時(shí),,破茬刀耕作阻力降低。結(jié)合根茬與土壤滑動(dòng)摩擦角的測(cè)量和破茬刀的運(yùn)行速度取值,,確定了刀片的刃口曲線方程,;進(jìn)一步通過分析根茬受力狀態(tài)及測(cè)定物料間摩擦角,確定驅(qū)動(dòng)式破茬刀的作業(yè)半徑為230 mm,;最后通過確定刀片的幾何尺寸,、刀軸和刀盤參數(shù)得到驅(qū)動(dòng)式破茬刀。有限元模態(tài)分析與強(qiáng)度,、剛度校核結(jié)果表明,,所設(shè)計(jì)的驅(qū)動(dòng)式破茬刀性能良好、滿足設(shè)計(jì)要求,。離散元仿真對(duì)比試驗(yàn)表明,,所設(shè)計(jì)的驅(qū)動(dòng)式破茬刀比驅(qū)動(dòng)式圓盤刀組的耕作阻力降低了19.78%、土壤拋起數(shù)量降低了13.95%,,其耕作阻力與動(dòng)土量性能均較優(yōu),。

    Abstract:

    Aiming at the phenomenon such as large amount of soil tillage, low rainfall in spring and high resistance to tillage, a striptype operation method with less tillage was proposed, and a driving stubble cutter was designed. By analyzing the working condition of the driven stubble cutter, the tillage resistance of the stubble cutter can be reduced when the sliding angle of the stubble cutter was greater than or equal to the friction angle of the stubble or soil in contact with it. Combined with the measurement of sliding friction angle between stubble and soil and the speed of stubble cutter, the curve equation of blade edge was determined. The stress state of the stubble was further analyzed and the friction angle between materials was measured, and the radius of the driven stubble cutter was 230 mm. Finally, the driven stubble cutter was obtained by determining the geometric size, cutter shaft and cutter head of the blade. Then, the finite element simulation model was used to verify the stability and performance of stubble cutter, and the discrete element simulation experiment was used to compare the performance and effect of stubble cutter operation. The results of the analysis and verification of the finite element simulation modal showed that the driven stubble cutter met the design requirements. The experimental results of discrete element simulation showed that the tillage resistance of the driven stubble cutter was 19.78% lower than that of the driven disc cutter, and the amount of soil throwing was 13.95% lower than that of the driven disc cutter. Therefore, the performance of driven stubble cutter in tillage resistance and soil moving capacity was better.

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王加一,趙淑紅,楊智杰,高連龍,楊悅乾.玉米條帶少耕作業(yè)驅(qū)動(dòng)式破茬刀設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2021,52(8):51-61. WANG Jiayi, ZHAO Shuhong, YANG Zhijie, GAO Lianlong, YANG Yueqian. Design and Experiment of Driving Stubble Cutter for Corn Strip with Less Tillage Operation[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(8):51-61.

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  • 收稿日期:2020-10-08
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  • 在線發(fā)布日期: 2021-08-10
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