谷物联合收获机清选系统研究现状

Research status of the cleaning system of the corn combine harvester

现阶段国内谷物联合收获机在收获过程中由于清选系统结构配置、作业参数调整不当等而导致谷物机械化收获损失率及含杂率较高。国内外谷物联合收获机清选系统的研究主要集中在清选装置结构、关键部件、气流场分布及物料运动规律等方面,为解决谷物清选装置清选效率低、总损失率和含杂率高、结构复杂等问题,提高谷物联合收获机清选系统的作业效率和性能,逐步实现信息化和智能化,结合现阶段研究现状,对试验研究中所采用的Fluent、ADAMS、CFD-DEM等软件仿真结果和田间试验结果综合分析,提出谷物清选系统结构优化的发展趋势,以期为谷物联合收获机整机结构改进提供参考依据。

At present,the loss rate and miscellaneous rate of grain mechanized harvest are higher due to the improper configuration of system structure and operation parameters.In order to solve the problems of low efficiency,high total loss rate,high miscellaneous content and complex structure,improve the operation efficiency and performance of the system and realize the informationization and intelligence step by step,the simulation results of Fluent,ADAMS,CFD-DEM and field experiments were analyzed,and the development trend of structural optimization of grain cleaning system was put forward in order to provide reference for the whole machine structure improvement of grain harvester.