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      2. 聯合收獲機割臺撥禾裝置的設計與運動學仿真
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        國家自然科學基金面上項目(51875230);湖北省自然科學基金項目(2017CFC817)


        Design and kinematics simulation of pulling device on header of combine harvester
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          摘要:

          以某聯合收獲機割臺的撥禾裝置為研究對象,基于Pro/E軟件建立其幾何模型并導入ADAMS進行合理簡化,添加約束、載荷和驅動得到其虛擬樣機模型,并在此基礎上進行運動學仿真。通過建立不同驅動,對不同工況下的撥禾裝置進行仿真分析,獲得撥禾裝置的作用范圍等相關參數。結果表明,只有當撥禾輪的撥禾速比λ>1時,運動軌跡才為余擺線,形成閉合扣環從而使彈齒能夠向后推送作物莖稈;當撥禾輪的撥禾速比為1.55時,撥禾輪作用程度最接近最佳作用程度,此時可以避免不必要的落粒損失且滿足正常工作要求;撥禾輪的最大和最小前移距離都隨撥禾速比的增大而增大,禾輪的前移范圍為0.00~0.38 m。

          Abstract:

          A certain combine harvester cutting platform and grain allocation device was used to establish the geometric model based on Pro/E software and reasonably simplify by importing the model established into ADAMS. The virtual prototype model was obtained by adding constraints,loads and drives,and kinematics simulation was carried out on this basis. The range of the threshing device and other relevant parameters were obtained through the establishment of different drives and the simulation analyses of different working conditions of the threshing device. The results showed that only when the speed ratio was λ>1,the motion trajectory was cycloid,forming a closed buckle so that the spring teeth can push the crop stalk backwards. When the reel ratio of the reel is 1.55,it is closest to the best effect of the reel,which can meet the working requirements of normal work and avoid unnecessary falling loss. The maximum and minimum forward movement distances of the reel increase with the increase of pull-grain speed ratio. The forward movement range of the reel is 0.00-0.38 m.

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        肖洋軼,楊銳,李航,徐紅梅,田鵬.聯合收獲機割臺撥禾裝置的設計與運動學仿真[J].華中農業大學學報,2020,39(4):156-162

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        • 收稿日期:2019-07-14
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        • 在線發布日期: 2020-07-30
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