Authors

Abstract

To address the high power consumption, limited load adaptability, and inadequate parameter matching of conventional axial-flow threshing devices, power-consumption tests were conducted on an axial-flow threshing device with adjustable threshing intensity using rice as the test material. The tests examined different threshing-intensity modes, separating-screen types, and operating parameters. The effects of these factors on no-load power consumption, effective power consumption, total power consumption, and mechanical efficiency were analyzed. The results showed that total power consumption was minimized when the threshing-intensity adjustment plates were fully open and the rectangular-hole separating screen was used. Total power consumption increased with increasing drum speed, deflector angle, and feed rate, but decreased with increasing concave clearance. Mechanical efficiency initially remained stable and then decreased as drum speed increased, whereas it increased with increasing deflector angle and feed rate. The specific threshing power consumption, expressed per unit feed rate, ranged from 4.4 to 5.2 kW/(kg/s). It increased with increasing drum speed, deflector angle, and feed rate, and decreased with increasing concave clearance. This study provides a reference for reducing power consumption and optimizing parameter matching in axial-flow threshing devices with adjustable threshing intensity.

Abstract in Chinese

针对传统轴流脱粒装置功耗偏高、负荷适应性差、参数匹配粗放等问题，以水稻为试验材料，在一种脱粒力度可调式轴流脱粒装置上，开展不同脱粒力度模式、分离筛板类型及不同工作参数条件下的脱粒功耗试验，分析各试验因素对空载功耗、有效功耗、总功耗及机械效率的影响规律。结果表明：脱粒力度调节板全部打开、采用长方形筛孔式分离筛板时总功耗最低；总功耗随滚筒转速、导流板角度、喂入量的增大而上升，随凹板筛间隙的增大而下降；机械效率随转速的升高先稳后降，随导流板角度及喂入量的增大而提高。装置单位喂入量脱粒功耗为 4.4～5.2 kW/(kg/s)，随滚筒转速、导流板角度、喂入速率的增加而升高，随凹板筛间隙的增大而降低。该研究可为脱粒力度可调式轴流脱粒装置低功耗优化与参数匹配提供参考。