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首页> 外文期刊>International Journal of Agricultural and Biological Engineering >Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM
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Motion simulation and test on threshed grains in tapered threshing and transmission device for plot wheat breeding based on CFD-DEM

机译：基于CFD-DEM的小麦田间锥形脱粒传动装置中脱粒机的运动仿真与试验。

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摘要

Mechanization of field experiments is the only way to improve crop breeding and seed propagation effects. In order to further clarify and improve the working performance of tapered threshing device for plot breeding, and reduce the remaining seeds in the device, the numerical simulation was carried out on the motion process of materials in the longitudinal-axial tapered cylinder threshing and transmission device of the plot wheat breeding combine harvester based on CFD-DEM method. Simulation results showed that, threshing and transmission of particles and short stalks at axial direction could be realized under the influence of air flow. Meanwhile, the material transference and distribution rule and stream field distribution rule of air flow in the threshing and transmission device were obtained, the variations of velocity and displacement of particles and short stalks with time were obtained; the motion trajectories and forms of particles in different types of retention were also studied. At rotating speed of 1300-1600 r/min for the tapered threshing cylinder in the verification test, the particle retention rate in the enclosure was 0-0.13%, while in the simulation the particle retention rate in the enclosure was 0-0.11%, only a 0.02% difference between them. The results proved a favorable feasibility to simulate the working performance of the tapered threshing and transmission device for plot breeding through gas-solid coupling method.
机译：田间实验的机械化是改善作物育种和种子繁殖效果的唯一途径。为了进一步阐明和提高锥度脱粒装置的工作性能，减少装置中残留的种子，对纵轴锥度筒体脱粒传动装置中物料的运动过程进行了数值模拟。 CFD-DEM方法的小区小麦育种联合收割机的设计仿真结果表明，在空气流的影响下，可以实现颗粒和短茎在轴向的脱粒和传播。同时，获得了脱粒和传动装置中气流的物质传递和分布规律以及流场分布规律，获得了颗粒和短茎的速度和位移随时间的变化;还研究了不同保留类型的运动轨迹和颗粒形式。在验证测试中，锥形脱粒滚筒在1300-1600 r / min的转速下，外壳中的颗粒保留率为0-0.13％，而在模拟中，外壳中的颗粒保留率为0-0.11％，它们之间只有0.02％的差异。结果证明，通过气固耦合方法模拟锥形脱粒和传动装置用于小区育种的工作性能具有良好的可行性。

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