| Design and testing of 4LZY-7 full feeding combine harvester of rapeseed |
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| DOI：10.7606/j.issn.1000-7601.2019.03.37 |
| Key Words: agricultural machinery rapeseed combine harvester mechanical loss rate impurity rate of granary mechanical crushing rate field experiment |
| Author Name | Affiliation | | YANG Yang | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | SUN Bu-gong | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Peng | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Ke-ping | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | TIAN Jia-zhuang | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Tao | College of Engineering, Gansu Agriculture University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to solve the problem of high loss rate and low operating efficiency of the machine harvesting of rapeseed in the northwestern China, a full feeding combine harvester, 4LZY-7,which can complete harvesting, threshing, separation, clearance, and storage,was designed and tested. By combining with the present rice-wheat combine harvester and the characteristics of rapeseed and the agriculture request during the harvest, we analyzed the operation mechanism of the core parts of prototype and the key parts of the prototype, the working parameters of the cutting system, the threshing system and the cleaning system were determined. The results of field experiments showed that: (1) When the working speed was between 0.8~1.2 m·s-1, the linear speed of the reel was between 1.4~1.8 m·s-1, and the speed ratio was 1.5~2.25, the loss rate of the cutting table was 2.35%. (2) When the circumference velocity of the threshing drum was between 15~20 m·s-1 and the threshing clearance was 20 mm, the threshed rate of the drum was more than 96.9%. (3) When fan outlet wind 4.07 m·s-1 and screen surface tilt angle was 16±2°, rapeseed content in screen out was 0.11%, the granary impurity rate was 2.83%. This resulted in a maximum mechanical loss rate of 3.95%, the highest impurity rate of granary of 2.83%, and a less than 0.2% of mechanical crushing rate. All of the experimental parameters and test indexes were in accordance with national and industry standards,and the testing results met the requirements of design and practical operation. |
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