切纵流联合收获机脱粒分离装置田间试验与参数优化

摘要

In order to obtain the optimal structure and operational parameters of the threshing and separation device of tangential-longitudinal combine,rice harvest in field was conducted to study influence of tangential drum-concave gap,longitudinal drum-concave gap and speed of tangential drum and longitudinal drum on the performance of total threshing-and-separation power consumption,tangential drum power consumption,longitudinal drum power consumption and entrained loss.The combine was re-constructed based on self-developed tangential-longitudinal combine and load test system was built for the combine.Optimal parameters are gained by quadric polynomial regress analysis and complex method,and tangential drum-concave gap is 30.99 mm,longitudinal drum-concave gap is 14 mm and the speed of tangential drum and longitudinal drum is 892.95 r/min and 848.95 r/min respectively.The test result showed that on the parameter' s condition,total power consumption was 39.03 kW,power consumption of tangential drum and longitudinal drum were 11.72 kW and 27.31 kW respectively and the entrained loss rate was 0.50％.Mixture distribution under tangential drum and longitudinal drum was analyzed,and it provide basis for design and optimization of cleaning unit.%为了研究切纵流联合收获机脱粒分离装置的最佳结构参数和运动参数,对履带式切纵流联合收获田间试验机进行结构改进、载荷测试系统的构建和水稻田间试验,研究切流滚筒、纵轴流滚筒间隙和切流滚筒、纵轴流滚筒转速对脱粒总功耗、切流滚筒功耗、纵轴流滚筒功耗和夹带损失率等性能的影响.并对总功耗和夹带损失率的数据进行二次多项式回归分析和复合型优化分析得到最佳参数配置:切流滚筒间隙为30.99 mm,纵轴流滚筒间隙为14mm,切流滚筒和纵轴流滚筒转速为892.95、848.95r/min.试验表明,该参数组合下,脱粒总功耗39.03 kW,切流滚筒功耗11.72 kW,纵轴流滚筒功耗27.31 kW,夹带损失率0.50％.对切流滚筒和纵轴流滚筒下方脱出混合物分布进行了研究,为清选装置的设计与优化提供了依据.