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仿形彈性鎮(zhèn)壓輥設(shè)計與試驗
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國家自然科學(xué)基金資助項目(51305158)、“十二五”國家科技支撐計劃資助項目(2014BAD06B03)和吉林省科技發(fā)展計劃資助項目(20125027)


Design and Experiment of Profiling Elastic Press Roller
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    摘要:

    針對保護性耕作條件下與大豆耕播機配套的鎮(zhèn)壓輥壓實土壤不均勻、相關(guān)耕播機具縱向尺寸過長的問題,設(shè)計了一種仿形彈性鎮(zhèn)壓輥,采用彈性輻條結(jié)構(gòu),通過理論分析確定了鎮(zhèn)壓輥的主要結(jié)構(gòu)參數(shù):直徑D=450mm,寬度B=210mm,彈性輻條數(shù)量n=12。利用ADAMS軟件對鎮(zhèn)壓輥進行運動仿真,同時進行土槽試驗,采用L9(34)正交試驗,在土壤干基含水率為20%時,考察了仿形彈性鎮(zhèn)壓輥的彈簧剛度k、載荷F、作業(yè)速度v和土壤堅實度P對其鎮(zhèn)壓力波動的影響。通過ADAMS運動仿真,找到了各因素的最佳取值范圍;通過正交試驗,得到了各因素的主次順序:載荷、彈簧剛度、土壤堅實度、作業(yè)速度,最優(yōu)組合為載荷800N,彈簧剛度5N/mm,土壤堅實度15kPa,作業(yè)速度0.5m/s,模擬仿真的結(jié)果與試驗結(jié)果吻合很好。通過對比試驗,得到仿形彈性鎮(zhèn)壓輥在壟臺表面有一定傾角的情況下能更好地保證鎮(zhèn)壓的均勻性。

    Abstract:

    Considering the deficiencies in uneven soil compaction and the too long vertical size that exists in the soybean tillage sowing machine during conservation tillage, the profiling elastic press roller which adopts the elastic spoke structure was designed. The main structure parameters of the press roller were determined through theoretical analysis, which means diameter D of 450mm, breadth B of 210mm and number of spokes n of 12. The work process of the roller was simulated by using the ADAMS software, at the same time, orthogonal tests of L9(34) were performed in an indoor soil bin with moisture content (dry basis) of 20%. The effects of spring stiffness coefficient (k), total loads (F), operation speed (v) and soil compactness (P) on pressure fluctuation were determined. The optimum ranges of each factor were determined through the ADAMS motion simulation. The results of orthogonal tests showed the primacy sequence of the experiment factors were total loads, spring stiffness coefficient, soil compactness, the operation speed, and optimal levels of the experiment factors were F of 800N,k of 5N/mm,P of 15kPa and v of 0.5m/s. The simulation results are in good agreement with the experimental results in the pressure fluctuations. Under the condition of a certain inclination angle on the ridge surface, the profiling elastic press roller can better ensure uniformity of soil compaction than that of conventional roller.

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賈洪雷,王文君,莊健,羅曉峰,姚鵬飛,李楊.仿形彈性鎮(zhèn)壓輥設(shè)計與試驗[J].農(nóng)業(yè)機械學(xué)報,2015,46(6):28-34,83. Jia Honglei, Wang Wenjun, Zhuang Jian, Luo Xiaofeng, Yao Pengfei, Li Yang. Design and Experiment of Profiling Elastic Press Roller[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(6):28-34,83.

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  • 收稿日期:2014-09-29
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  • 在線發(fā)布日期: 2015-06-10
  • 出版日期: 2015-06-10
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