农业机械学报2025，Vol.56Issue(5)：222-234,13.DOI:10.6041/j.issn.1000-1298.2025.05.021
基于CFD-DEM的气送式稻麦兼用型高速播种机种子减速器设计与试验
Design and Test of Seed Reducer for Air-fed Rice-Wheat High-speed Seeder Based on CFD-DEM
摘要
Abstract
In order to solve the problems of low seed feeding accuracy and unstable seed feeding caused by the fast seed conveying speed of the air-fed rice-wheat dual-purpose high-speed seeder,a seed reducer based on the principle of cyclone deceleration was designed.The CFD-DEM coupling simulation method was used to carry out a single factor test to determine the main structural factors and select the appropriate size range.In order to determine the structural parameters of the seed reducer,the Box-Bhnken orthogonal combination simulation test was carried out based on the single factor test results,and the results showed that the optimal structural dimensions were 82.352 num of cylinder diameter D,cylinder length Ht of 101.364 mm,exhaust port diameter Dp of 25.000 2 mm,cone length H of 67.902 5 mm,and the indica seed outlet flow velocity V,and seed vertical velocity V2 were 5.212 m/s and 0.462 m/s,respectively.The seed flow velocity V1 and seed vertical velocity V2 of japonica rice were 5.339 m/s and 0.473 m/s,respectively.The flow velocity V1 and seed vertical velocity V2 of wheat seeds were 5.341 m/s and 0.408 m/s,respectively.The results of bench verification test showed that the vertical velocity of indica rice seeds was 0.411 m/s,japonica rice seeds was 0.452 m/s,and wheat seeds are 0.457 m/s at the seed outlet,which was consistent with the simulation test results.It can be seen from the bench test of strip sowing performance that the effect of strip arrangement with seed reducer was significantly better than that without seed reducer,and the coefficient of variation of displacement uniformity of indica,japonica rice and wheat was decreased from 41.61％,25％and 37.84％without seed reducer to 9.10％,8.42％and 8.49％,respectively,which met the performance requirements of seed reducer.The results can provide guidance for improving the seeding performance of air-fed rice-wheat seeder in the future.关键词
高速播种机/稻麦兼用/种子减速器/CFD-DEMKey words
high-speed seeder/rice-wheat combined use/seed reducer/CFD-DEM分类
农业科技引用本文复制引用
臧英,张美林,黄子顺,姜有聪,钱诚,王在满..基于CFD-DEM的气送式稻麦兼用型高速播种机种子减速器设计与试验[J].农业机械学报,2025,56(5):222-234,13.基金项目
国家重点研发计划项目(2021YFD2000403)和现代农业产业技术体系建设专项资金项目(CARS-01) （2021YFD2000403）
