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GUO Ziyi, E-mail: 13021897226@163.com
Outline
Cleaning is a critical process in the mechanized harvesting of grains and legumes, with the cleaning device in combine harvesters being the key component determining harvest quality. As agricultural mechanization advances and legume cultivation expands, the mismatch between grain combine harvesters and legume harvesting has become increasingly prominent. This results in low cleaning quality and significant losses, urgently requiring research into efficient, high-quality, low-loss cleaning technologies and devices suitable for legume harvesting. By reviewing global research progress on combine harvester cleaning systems and key component developments, which include sieve structure, motion patterns, and fan design, this study systematically examines research methodologies and findings related to airflow dynamics and material particle movement within cleaning mechanisms. It summarizes the application of intelligent technologies for process monitoring and adaptive adjustment in combine harvester cleaning systems, providing an analytical overview of grain combine cleaning technology research. By contrasting differences in seed characteristics and impurity types between legumes and grains, this section discusses the unique challenges in legume harvesting, which include susceptibility to damage, high cleaning losses, and high moisture content in separated materials, and analyzes the applicability of grain combine cleaning technology to legume harvesting. It summarizes current cleaning technologies and devices suitable for legumes. Finally, it highlights existing issues with current combined cleaning devices, including unstable cleaning performance, low adaptability, and inadequate intelligence levels. Based on these challenges, it outlines future development trends for bean combine cleaning devices. The research findings provide valuable references for enhancing the suitability of combined cleaning systems for bean harvesting.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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