农业机械学报2025，Vol.56Issue(7)：82-93,12.DOI:10.6041/j.issn.1000-1298.2025.07.007
独立电驱清选的高湿小麦脱粒机设计与试验
Design and Test of Isolated-motor-driven Cleaning System for High Moisture Wheat Thresher
摘要
Abstract
Aiming at the high moisture content wheat harvested in hilly and mountainous areas represented by Guizhou,the traditional wheat thresher can not effectively realize the cleaning separation of high moisture wheat due to insufficient power.A isolated-motor-driven cleaning technology was proposed to reduce the impurity rate and loss rate for high moisture wheat cleaning in segmented harvesting.According to the working principle of the cleaning system and aerodynamic theory,the grain movement process was analyzed and the key factors influencing the wheat cleaning performance were identified.A numerical simulation model with fluid-solid coupling was constructed by integrating computational fluid dynamics and discrete element method(CFD-DEM).Taking the impurity rate and loss rate as the evaluation indexes,the influence of the tilting angle of guide tube,cross-sectional area of suction tube and negative pressure at the suction port on the cleaning performance was investigated.The non-dominated sorting genetic algorithm(NSGA-Ⅱ)was used to perform the optimization design of key parameters matching.When the tilting angle of guide pipe was 24.008 8°,the cross-sectional area of suction pipe was 179.806 2 cm2,and the negative pressure at the suction port was 873.631 6 Pa,the impurity rate and loss rate of the cleaning system were 0.92％and 0.96％,respectively.Prototype trial manufacture and experimental verification was carried out,the results showed that the cleaning impurity rate and loss rate were 1.21％and 0.82％,respectively.Compared with the traditional wheat thresher,the impurity rate was reduced by 35.98％with the loss ratio remaining no large change.The research results can provide theoretical and technical support for the research and development of high moisture wheat cleaning equipment of hilly and mountainous areas.关键词
小麦脱粒机/清选系统/CFD-DEM/NSGA-Ⅱ/优化设计Key words
wheat thresher/cleaning system/CFD-DEM/NSGA-Ⅱ/optimal design分类
农业科技引用本文复制引用
刘策,张浩天,朱俊文,王伟,张春岭,陈黎卿..独立电驱清选的高湿小麦脱粒机设计与试验[J].农业机械学报,2025,56(7):82-93,12.基金项目
安徽省高等学校科学研究项目(2024AH050467)和财政部和农业农村部:国家现代农业产业技术体系项目(CARS-03-44) （2024AH050467）
