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      2. 鼓形與圓柱形桿齒式縱軸流脫粒滾筒功耗對比試驗研究
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        華中農業大學

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        S2

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        國家重點研發計劃子課題(2017YFD0301404-05,2018YFD0301304-3)和中央高?;究蒲袠I務費專項基金(2662018PY038),湖北省高等學校優秀中青年科技創新團隊計劃項目(T201934)


        Comparative Experimental Study on Power Consumption of Drum and Cylindrical Rod-tooth Longitudinal Axial Flow Threshing roller
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          摘要:

          為降低功耗,同時減少脫粒滾筒堵塞,提高水稻聯合收獲機收獲效率,設計了一種鼓形桿齒式縱軸流脫粒滾筒,并對其功耗進行了仿真與試驗研究。以相同外部尺寸的圓柱形桿齒式縱軸流脫粒滾筒為對照,以脫粒滾筒旋轉軸總力矩為試驗指標,進行了基于離散元法的對比試驗,結果表明:相同喂入量下,兩種結構的脫粒滾筒旋轉軸總力矩存在明顯差異,鼓形滾筒旋轉軸總力矩小于圓柱形滾筒,且隨喂入量增大,差異越大。進行了與仿真條件一致的兩種脫粒滾筒結構功耗對比臺架試驗,結果表明:在喂入量為0.8~1.6kg/s范圍內,同比于相同外部尺寸的圓柱形滾筒,鼓形結構的脫粒滾筒功耗平均降低5%~15%。隨喂入量增加,功耗增大。該研究可為低功耗水稻脫粒滾筒的結構設計提供參考。

          Abstract:

          In order to reduce the power consumption, reduce the blockage of the threshing roller and improve the harvesting efficiency of the rice combine harvester, a drum-shaped rod-tooth longitudinal axial flow threshing roller was designed, and its power consumption was studied by simulation and experiment. The cylindrical rod-tooth longitudinal axial flow threshing roller with the same external dimensions was used as a control, and the total torque of the threshing roller rotating shaft was used as the test index. The comparative test based on the discrete element method was carried out. There is a significant difference in the total torque of the threshing roller rotating shaft of the structure. The total torque of the rotating shaft of the drum roller is smaller than that of the cylindrical roller, and the larger the difference is with the increase of the feed amount. A bench test for comparing the power consumption of two threshing roller structures consistent with the simulation conditions has been carried out. The results show that: within the feed rate of 0.8~1.6kg/s, it is comparable to the cylindrical roller with the same external dimensions and the roller structure threshing The roller power consumption is reduced by 5% to 15% on average. As the feed volume increases, the power consumption increases. Compared with the results under the simulation test conditions, the increasing trend of power consumption is different. Under the bench test conditions, the increase in power consumption is decreasing. Other laws are basically the same. Provide reference for the structure design of low-power rice threshing roller.

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        • 收稿日期:2020-08-05
        • 最后修改日期:2020-09-25
        • 錄用日期:2020-09-29
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