水稻秧盘育秧制浆刀片匀浆过程分析及其优化设计

针对现阶段水稻秧盘育秧技术中制匀泥浆效率低下的问题,采用正交设计方法、计算流体动力学数值模拟和试验分析,对不同参数刀片在水田中匀浆作业时的匀浆效果和功率损耗进行研究。结果表明:1)单刀切削幅宽为影响泥浆运动速度和功率损耗的最大因素,折弯角影响不明显;2)当刀片滑切角为50°,折弯角为115°,单刀切削幅宽为60 mm时,刀片匀浆效果好;当滑切角为30°,折弯角为135°,单刀切削幅宽为20 mm时,功率损耗小;3)刀片中心面处和刀片折弯侧0.1 m处刀片打匀泥浆效果良好;4)功率损耗仿真值与试验值平均相对误差为12.16%,在可接受范围内。

Process analysis and optimization design of blades in rice seedling raising tray for mud homogenizingXIE Yu, REN Jinbo, ZHANG Xiang*

Aimed at the problem of mud homogenizing inefficiency in rice seedling raising tray technology at present, the orthogonal design method, computational fluid dynamics(CFD)numerical simulations and experimental analyses were used to study the homogenizing effects and power consumption of blades with different parameters during mud homogenizing operation in paddy fields. The results showed that: 1)The single-knife cutting width was the biggest factor affecting the mud movement velocity and power consumption, and the effect of bending angle was not obvious; 2)When the sliding-cutting angle was 50°, the bending angle was 115° and the single-knife cutting width was 60 mm, the effect of mud homogenizing was good. When the sliding-cutting angle was 30°, the bending angle was 135°and the single-knife cutting width was 20 mm, the power consumption was the smallest; 3)The blade homogenized mud well at the center of the blade and 0. 1 m from the bending side of the blade; 4)The average relative error of power consumption between simulation value and experiment value was 12. 16%, which was acceptable.