STUDY AND EXPERIMENT ON THE OPERATIONAL ADAPTABILITY OF SLOPE CORN HARVESTERS

ABSTRACT Studies on the operational adaptability of slope corn harvesters on hilly slopes are of great significance to improve the performance and safety of the whole machine, but there are few studies on this aspect at the present. Therefore, this paper takes a self-developed small sloping land crawler corn harvester as the object combined with the special topography of the hilly sloping land and the technology adopted by the machine to make a mathematical analysis of its operational adaptability on the sloping land. Through the field test, the forward speed of the corn harvester, track wheel spacing and slope angle are used as the test factors, and the harvest loss rate of the corn ear is used as the assessment index to carry out the orthogonal test on the slope land. The analysis of the results based on the Design-expert response surface was completed. The results show that the ear loss rate of the experiment under different conditions is less than 5% of the national standard. The corn harvester has good adaptability to sloped land, which can realize the mechanized operation of corn on the hilly and sloped land, and has good agricultural production application value.摘要 针对丘陵坡地玉米联合收割机的作业适应性开展研究，对提升整机性能与作业安全具有重要意义，但当前该领域相关研究仍较为匮乏。为此，本文以自主研发的小型坡地履带式玉米联合收割机为研究对象，结合丘陵坡地的特殊地形与该机所采用的作业技术，对其在坡地的作业适应性开展数学分析。本研究通过田间试验，以玉米联合收割机前进速度、履带轮间距及坡地坡度为试验因素，以玉米果穗收获损失率为评价指标，在坡地开展正交试验，并基于Design-expert软件完成响应面法结果分析。试验结果表明，不同工况下的果穗损失率均低于国家标准的5%；该玉米联合收割机对坡地具有良好的适应性，可实现丘陵坡地玉米机械化作业，具备优良的农业生产应用价值。