农业机械学报2025，Vol.56Issue(7)：38-47,10.DOI:10.6041/j.issn.1000-1298.2025.07.003
气力斜盘式小麦宽苗带匀播排种器设计与试验
Design and Experiment of Pneumatic Swash Plate Wheat Wide-seedling-belt Uniform Sowing Device
摘要
Abstract
Wide-seedling-belt uniform sowing is an effective approach to improve wheat yield per unit area.To addresses the issues of poor uniformity and insufficient seedling belt width in existing wheat seeders for wide-seedling-belt,a pneumatic swash plate wheat wide-seedling-belt uniform sowing device was designed.Through theoretical analysis,a mechanical model of the seeding plate during the filling,carrying,and throwing processes was developed,which helped to identify and resolve the key factors influencing the performance of the seed metering device.Simulation tests and bench tests were conducted to determine the optimal structural and working parameters of the seed metering device.The results of the CFD simulation tests indicated that under the optimal structural parameters,specifically a hole diameter of 1.91 mm,a cylindrical hole type,and a negative-pressure suction port diameter of 32.18 mm,the flow velocity within the holes and the pressure difference across the holes were in an optimal state for seeding.The CFD-DEM coupling simulation tests further revealed that when the tilt angle of the seeding plate was set at 20°,the device exhibited an excellent population disturbance effect and minimal seed migration resistance.Furthermore,the bench tests determined that the optimal combination of working parameters was a rotational speed of 30 r/min and a suction negative pressure of 4 500 Pa.Under these conditions,the row consistency variation coefficient(RCV),total consistency variation coefficient(TCV),and sowing uniformity variation coefficient(SUV)of each row were 2.04％,1.45％,and 9.87％,respectively.These values met the requirements for wheat wide-seedling-belt uniform sowing.The findings can provide technical support for the design and application of wheat wide-seedling-belt uniform seeders.关键词
小麦/宽苗带/排种器/气力斜盘式/CFD-DEM/参数优化Key words
wheat/wide-seedling-belt/seed metering device/pneumatic swash plate type/CFD-DEM/parameter optimization分类
农业科技引用本文复制引用
赵鹏飞,邓敏,王孟盛,王择一,陀金阳,刘正道,黄玉祥,闫小丽..气力斜盘式小麦宽苗带匀播排种器设计与试验[J].农业机械学报,2025,56(7):38-47,10.基金项目
陕西省重点研发计划项目(2024PT-ZCK-52) （2024PT-ZCK-52）
