气吸式播种器排种盘结构参数分析及优化—基于Fluent软件

Structural Parameter Analysis and Optimization of Metering Disc in Air-suction Seed Metering Device—Based on Fluent Software

根据气吸式播种器的结构及原理,运用流体知识建立数学模型,分析了真空室速度与负压的影响因素,并运用Gambit、Fluent软件模拟仿真及验证数学模型分析的可行性。同时,进行了排种器性能试验,结果表明:排种盘上吸种孔壁与轴心夹角在0°~45°增大过程中,有利于种子吸附,以及风机选型与动力匹配;排种盘上吸种孔壁与轴心夹角为30°~45°时,排种器排种效果最好。最后,分析得出数学模型、模拟数据和试验数据,为今后排种盘的设计制造及气吸式播种机动力选型提供理论依据。

According to structure and principle of air-suction seed metering device, the mathematical model is estab- lished by using fluid knowledge, and the factors influencing the velocity and negative pressure of vacuum chamber are an- alyzed. In addition, the feasibility of mathematical model analysis are simulated and verified by using Gambit and Fluent software. Finally the performance test of metering device shows that the angle between the suction hole and the axis of the seed in the row is about 0 ° - 45 °, which is favorable for seed adsorption and is favorable for fan selection and power matching, and the angle is about 30° -45° shows the best performance. The mathematical model, simulated data and test data obtained in this paper can provide theoretical basis for the design and manufacture of the seed row and dynamic selection of the air suction sowing machine.