| 玉米籽粒收获机组合筛面预筛分式清选装置设计与试验 |
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| 引用本文： | 王飞,阿力木·买买提吐尔逊,张俊三,李谦绪,徐路明.玉米籽粒收获机组合筛面预筛分式清选装置设计与试验[J].农业机械学报,2024,55(5):135-147，166. |
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| 作者姓名： | 王飞 阿力木·买买提吐尔逊 张俊三 李谦绪 徐路明 |
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| 作者单位： | 新疆农业大学;新疆农业大学；新疆新研牧神科技有限公司 |
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| 基金项目： | 新疆维吾尔自治区重点研发计划项目（2022B02016） |
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| 摘 要： | 针对目前玉米籽粒收获机不能适应15kg/s以上的大喂入量清选需要，设计了一种具备预清选功能的清选装置。首先对玉米脱出物离开螺旋输送器到达预清选筛前的玉米籽粒进行受力分析，然后对曲柄连杆机构的运动模型加以简化。其次分析玉米籽粒在筛面上的运动状态；对离心风机叶轮、蜗壳进行设计计算。采用单因素试验确定风机转速、振动频率、上筛筛孔开度取值范围；以风机转速、振动频率、上筛筛孔开度为试验因素，以籽粒含杂率和清选损失率为评价指标，设计三因素三水平中心组合试验，建立各因素与指标之间的回归模型。通过响应曲面方法对试验结果进行分析，并采用Design-Expert12对回归模型进行多目标优化。玉米脱出物喂入量为16kg/s时，得出较优组合为：风机转速1202.50r/min、振动频率5.41Hz、上筛筛孔开度18mm，在此条件下籽粒含杂率为0.79%，清选损失率为1.10%；验证试验结果表明，当风机转速1200r/min、振动频率5Hz、上筛筛孔开度18mm时，籽粒含杂率为0.82%，清选损失率为1.14%，试验值与优化值相对误差小于5%，与传统双层往复振动筛清选装置相比籽粒含杂率降低2.07个百分点，清选损失率降低2.13个百分点，证明所设计合理。
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| 关 键 词： | 玉米籽粒收获机 预清选装置 大喂入量 曲柄连杆机构 |
| 收稿时间： | 2023/10/9 0:00:00 |
Design and Experiment of Pre-screening Cleaning Device for Combined Screen Surface of Corn Grain Harvester |
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| WANG Fei,ALIMU Maimaitituersun,ZHANG Junsan,LI Qianxu,XU Luming.Design and Experiment of Pre-screening Cleaning Device for Combined Screen Surface of Corn Grain Harvester[J].Transactions of the Chinese Society of Agricultural Machinery,2024,55(5):135-147，166. |
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| Authors: | WANG Fei ALIMU Maimaitituersun ZHANG Junsan LI Qianxu XU Luming |
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| Abstract: | In view of the fact that the current corn grain harvester can not meet the need of large feeding quantity cleaning above 15kg/s, a kind of cleaning device with pre-cleaning function was designed. Firstly, the stress analysis of corn grains before the extruder leaved the screw conveyor and reached the pre-cleaning screen was carried out, and then the motion model of the crank linkage mechanism was simplified. Secondly, the motion state of corn grains on the sieve surface was analyzed. The impeller and volute of centrifugal fan were designed and calculated. The single factor test was used to determine the fan speed, vibration frequency and the value range of the upper screen opening. With the fan speed, vibration frequency and the opening of the upper screen as test factors, and the grain impurity content and cleaning loss rate as evaluation indexes, the three-factor and three-horizontal center combined test was designed to establish a regression model between the factors and indexes. The test results were analyzed by response surface method, and the regression model was optimized by Design Expert 12. When the feeding amount of corn extract was 16kg/s, the optimal combination was obtained. The test results showed that the fan speed was 1202.50r/min, the vibration frequency was 5.41Hz, and the opening of the upper screen was 18mm. Under these conditions, the grain impurity content was 0.79% and the cleaning loss rate was 1.10%. The verification test showed that the speed of the fan was 1200r/min, the vibration frequency was 5Hz, and the opening of the upper screen was 18mm. At this time, the kernel impurity content was 0.82%, the cleaning loss rate was 1.14%, the relative error between the test value and the optimization value was less than 5%, and the kernel impurity content was 2.07 percentage points lower than that of the traditional double-layer reciprocating vibrating screen cleaning device. The loss rate of cleaning was reduced by 2.13 percentage points, which proved that the design was reasonable and met the national cleaning standard. |
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| Keywords: | corn grain harvester pre-cleaning device large feeding quantity crank linkage mechanism |
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