农业机械学报2026，Vol.57Issue(13)：222-233,12.DOI:10.6041/j.issn.1000-1298.2026.13.018
基于DEM-CFD的气压式高速玉米播种机工作参数优化与试验
Optimization and Experiment of Operating Parameters for Pneumatic High-speed Maize Seeder Based on DEM-CFD
摘要
Abstract
High-density planting,high-precision operation and high-speed production have become the new paradigm of modern corn production,putting forward strict requirements for sowing equipment.Pneumatic maize planters have attracted much attention because they can maintain a high seeding qualification rate even at high speeds.However,sowing operations confronted with three major challenges:unstructured environment,high agronomic constraints,and strong farming seasons,which led to complex and changeable working conditions.Improper matching of operational parameters to conditions reduced seeding quality and underutilized equipment performance.The DEM-CFD gas-solid two-phase coupling method was employed to elucidate seed motion dynamics and mechanical behavior within the seed metering device at the microscale.Air pressure,seed feed rate,and seed cleaning gap were identified as critical factors affecting seeding quality.Using single grain rate as the evaluation metric,the operating parameters were optimized for two representative corn varieties in the Huang-Huai-Hai region(Huangjinliang MY73 and Zhengdan 958)through Box-Behnken response surface methodology.The optimal parameter combinations were determined as follows:for MY73 at 12 km/h,maximum singulation rate was achieved at 4 kPa air pressure,with seed feed rate and cleaning gap set to Level 7;for Zhengdan 958 at 12 km/h,optimal performance occurred at 4.5 kPa air pressure,Level 8 feed rate,and Level 7 cleaning gap.Orthogonal test results demonstrated that air pressure,seed feed rate,and seed cleaning gap had a very significant effect on single grain rate,with obvious interactions between factors;the established regression model fit well and can accurately predict seed discharge performance.Results demonstrated significant variation in optimal parameters across varieties and operating speeds.The research result can provide a reference for parameter selection in practical operations,which can establish a theoretical foundation for automated parameter configuration in intelligent seeding systems.关键词
玉米播种机/气压式排种器/DEM-CFD/播种质量Key words
maize seeder/pneumatic seed metering device/DEM-CFD/sowing quality分类
农业科技引用本文复制引用
王家忠,康伟业,曹志兴,弋景刚,赵晓顺,刘忠军..基于DEM-CFD的气压式高速玉米播种机工作参数优化与试验[J].农业机械学报,2026,57(13):222-233,12.基金项目
河北省重大科技支撑计划项目(242N7201Z)和河北省现代农业产业技术体系建设专项资金项目(HBCT2024020205) （242N7201Z）
