数字农科院2.0

Measurement of the seed spacing uniformity of a seed-metering device as a function of the positive pressure inlet structural parameters based on CFD-DEM

文献类型： 外文期刊

作者： Dandan Han;Tingyi Mo;Yunxia Wang;You Xu;Lijia Xu

作者机构：

关键词： CFD-DEM coupling;Positive pressure inlet pipe;Seed-metering device;Seeding uniformity

期刊名称： Measurement: Journal of the International Measurement Confederation

ISSN： 0263-2241

年卷期： 2025 年 247 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： To investigate the impact of the positive pressure inlet pipe on the seeding uniformity, a series of coupling simulations and physical bench tests were conducted on the working process of the seed-metering device. The angles of the positive pressure inlet pipe in the XOZ plane (α) and YOZ plane (β), along with the vertical orientation, and its inner diameter (d) were utilized as test variables. The assessment metrics included seed-guiding time (tp), the variation coefficient of seed-guiding time (CVt), and the variation coefficients of seed spacing (CVs). The findings indicate that all three structural parameters significantly influenced tp, CVt, and CVs, and these can be accurately predicted using the model derived from regression analysis of the central composite design results. The optimal structural parameters identified are 71.57° for angle α, 73.17° for angle β, and 17.4 mm for inner diameter. Under these optimal working conditions, the qualified rate ranges from 90 % to 95.09 %, and the variation coefficient of seed spacing ranges from 18.71 % to 22.17 %.

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