农业工程学报
農業工程學報
농업공정학보
2014年
23期
28-34
,共7页
农业机械%设计%优化%联合收割机%脱粒分离%纵轴流滚筒%分布规律
農業機械%設計%優化%聯閤收割機%脫粒分離%縱軸流滾筒%分佈規律
농업궤계%설계%우화%연합수할궤%탈립분리%종축류곤통%분포규률
agricultural machinery%design%optimization%combine harvester%threshing and separation%longitudinal-flow threshing cylinder%distribution rule
为优化设计切纵流联合收割机纵轴流滚筒的长度，该文通过设计脱粒分离长度可变的纵轴流滚筒并进行喂入量为7 kg/s的水稻脱粒分离性能和籽粒分布试验，分析纵轴流滚筒下脱出混合物的分布规律，建立纵轴流滚筒的籽粒分布方程，计算纵轴流滚筒长度；通过计算纵轴流滚筒顶盖导流板的最佳导角对纵轴流滚筒长度进行优化，确定纵轴流滚筒长度的最佳值并进行水稻脱粒分离性能试验。结果表明，在水稻喂入量为7 kg/s，纵轴流滚筒顶盖导流角为7.64°时，优化后的纵轴流滚筒长度最佳值为3159.77 mm，经优化后的纵轴流滚筒脱粒分离的籽粒夹带损失率约为0.29%。该研究为纵轴流联合收割机的纵轴流滚筒设计提供了参考。
為優化設計切縱流聯閤收割機縱軸流滾筒的長度，該文通過設計脫粒分離長度可變的縱軸流滾筒併進行餵入量為7 kg/s的水稻脫粒分離性能和籽粒分佈試驗，分析縱軸流滾筒下脫齣混閤物的分佈規律，建立縱軸流滾筒的籽粒分佈方程，計算縱軸流滾筒長度；通過計算縱軸流滾筒頂蓋導流闆的最佳導角對縱軸流滾筒長度進行優化，確定縱軸流滾筒長度的最佳值併進行水稻脫粒分離性能試驗。結果錶明，在水稻餵入量為7 kg/s，縱軸流滾筒頂蓋導流角為7.64°時，優化後的縱軸流滾筒長度最佳值為3159.77 mm，經優化後的縱軸流滾筒脫粒分離的籽粒夾帶損失率約為0.29%。該研究為縱軸流聯閤收割機的縱軸流滾筒設計提供瞭參攷。
위우화설계절종류연합수할궤종축류곤통적장도，해문통과설계탈립분리장도가변적종축류곤통병진행위입량위7 kg/s적수도탈립분리성능화자립분포시험，분석종축류곤통하탈출혼합물적분포규률，건립종축류곤통적자립분포방정，계산종축류곤통장도；통과계산종축류곤통정개도류판적최가도각대종축류곤통장도진행우화，학정종축류곤통장도적최가치병진행수도탈립분리성능시험。결과표명，재수도위입량위7 kg/s，종축류곤통정개도류각위7.64°시，우화후적종축류곤통장도최가치위3159.77 mm，경우화후적종축류곤통탈립분리적자립협대손실솔약위0.29%。해연구위종축류연합수할궤적종축류곤통설계제공료삼고。
In order to optimize the length of longitudinal-flow threshing cylinder of combine harvester, in this paper the length-adjustable longitudinal-flow threshing cylinder was designed and used to conduct rice threshing and separating performance experiments. The grain distribution rules and distribution equation under the grid concave were developed. The length of longitudinal-flow threshing cylinder was optimized by calculating the optimal deflector helical angle of cylinder cover. The optimal length of the longitudinal-flow threshing cylinder was used to conduct rice threshing and separation performance confirmatory test. The result showed that when the feeding rate was 7 kg/s, adapted deflector helical angle of 7.64°, the optimal length of the longitudinal-flow threshing cylinder was 3 159.77 mm, and then the un-separated grain loss ratio could be controlled at the range from 0.2%to 0.3%. The verification test result was about 0.29%. This study may provide a basis and method for design the length of longitudinal- flow threshing cylinder of combine harvester.
