Authors

Abstract

In order to address the high impurity and loss rates in the cleaning process of existing peanut combine harvesters, the design basis of the cleaning sieve was explored. Tests were conducted to determine the composition of the peanut picking fruit and the characteristics of the material suspension mixture. Additionally, the mechanical relationship between the fruit and miscellaneous mixtures and the cleaning sieve was investigated. The wind speed ranged from 8 m/s to 10 m/s, the vibration frequency ranged from 6 Hz to 8 Hz, and the inclination angle of the sieve ranged from 5° to 9°. The scavenger sieve platform was constructed and tested using Box-Behnken’s central combination test method. The optimal combination of fan wind speed (9 m/s), sieve surface inclination angle (8°), and sieve vibration frequency (7 Hz) resulted in a pod impurity rate of 1.16% and a loss rate of 1.4%. The device significantly reduces impurity content and loss rate during peanut harvesting. The study's results can serve as a reference for improving the design of the peanut combine harvester cleaning mechanism and optimizing operating parameters.

Abstract in Chinese

针对现有花生联合收获机清选环节含杂率高、损失率大等问题，探究了清选装置设计依据，开展了花生摘果脱出物料的组成成分测定试验、混合物料悬浮特性试验，并探究了果杂混合物料与清选筛力学关系，确定风速为8 m/s~10 m/s；振动频率为6 Hz~8 Hz；清选筛倾角为5°~9°。搭建形成清选筛台架并运用Box-Benhnken的中心组合试验方法开展试验并优化，得最优参数组合风机风速为9 m/s、清选筛倾角为8°、清选筛振动频率7 Hz，对应的荚果含杂率为1.16 %、清选损失率为1.4 %。该装置的作业效果显著降低了花生收获环节的含杂率和损失率，研究结果可为花生联合收获机清选机构的完善设计和作业参数优化提供参考。