鼓形与圆柱形杆齿式纵轴流脱粒滚筒功耗对比试验
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国家重点研发计划项目(2016YFD030090704);中央高校基本科研业务费专项 (2662018PY038);湖北省高等学校优秀中青年科技创新团队计划项目(T201934)


Comparing power consumption of drum and cylindrical rodtooth longitudinal axial flow threshing roller
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    摘要:

    为降低功耗,同时减少脱粒滚筒堵塞,提高水稻联合收获机收获效率,设计了一种鼓形杆齿式纵轴流脱粒滚筒,并对其功耗进行了仿真与试验研究。以具有相同外部尺寸的圆柱形杆齿式纵轴流脱粒滚筒为对照,以脱粒滚筒旋转轴总力矩为试验指标,进行了基于离散元法的对比试验,结果显示:相同喂入量下,2种结构的脱粒滚筒旋转轴总力矩存在明显差异,鼓形滚筒旋转轴总力矩小于圆柱形滚筒,且随喂入量增大,差异越大。与仿真条件一致的2种脱粒滚筒结构功耗对比台架试验结果表明,在喂入量为0.8~1.6 kg/s时,随喂入量增加,滚筒功耗增大,与相同外部尺寸的圆柱形滚筒相比,鼓形结构的脱粒滚筒功耗平均降低5%~15%。

    Abstract:

    Rice is one of the staple food crops in China and one of the three staple food crops all over the world. The combine harvester has been widely used due to the improved level of riceharvesting mechanization year by year. The longitudinal axialflow threshing and separating device is of widespread use in combine harvester because of its advantages of long threshing time,soft threshing process and good adaptability. However,the device has the disadvantages of high power consumption,broken stalks and high content of impurity. The power consumption of the device plays an important part in the combine harvester. The researches on energy saving and consumption reduction have great significance for developing combine harvester with large feeding capacity,lightweight and high efficiency. In order to reduce the power consumption and blockage of threshing roller,then improve the harvesting efficiency of rice combine harvesters,a new longitudinal axialflow threshing roller with drum-shaped rod-E130tooth was designed based on the idea that the power consumption of the threshing roller can be reduced by improving the uniformity of the longitudinal axialflow threshing roller power consumption along the axial direction. Its structural parameters and motion parameters were determined by analyzing the working principle of the device. The models of power consumption and threshing roller dynamic were established by observing the process of threshing and separation. Based on the EDEM simulation analysis,the instantaneous total torque of rotating shaft of threshing roller with time was simulated and studied with feeding rate of 1.2 kg/s and rotating speed of 1 100 r/min. Taking the total torque of the rotating shaft of the threshing roller as the test index,the performance of the two kinds of rollers was compared with the feeding rate of 0.8 kg/s,1.2 kg/s and 1.6 kg/s. The results showed that the total torque of the rotating shaft of the threshing roller increased with the increase of the feeding rate for the same roller size and motion parameters. When the feeding rate increases from 0.8 kg/s to 1.6 kg/s,the total torque of the drumshaped threshing roller rotating shaft increases from 38.12 N·m to 118.99 N·m,and the cylindershaped threshing roller increased from 60.13 N·m to 189.91 N·m. Under the same feeding rate,the total torque of rotating shaft of drumshaped threshing roller is lower than that of cylindershaped threshing roller. The performance testing platform of a small longitudinal axialflow threshing and separating device was designed and built. The power consumption comparison bench test of two kind structures of threshing roller under conditions consistent with the simulation was carried out. The results showed that the power consumption of drumshaped threshing roller and cylindershaped threshing roller increased from 4.88 kW to 11.20 kW and from 5.58 kW to 12.20 kW in the feeding rate range of 0.81.6 kg/s. Compared with the cylindershaped threshing roller with the same external size,the power consumption of drumshaped threshing roller is lower than that of cylindershaped threshing roller. The results of bench test and simulation are basically consistent. It will provide a reference for designing the drum structure of the rice lowpower threshing roller.

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谢干,张国忠,付建伟,周勇,王洋,高原,王伟康,Mohamed Anwer.鼓形与圆柱形杆齿式纵轴流脱粒滚筒功耗对比试验[J].华中农业大学学报,2021,(1):202-209

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  • 收稿日期:2020-08-05
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  • 在线发布日期: 2021-02-10
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