A seed posture correction element for a high-speed soybean seed guiding device and its design method

Abstract

This invention relates to a seed posture correction element and its design method for a high-speed soybean seed conveying device, specifically for high-speed precision seeding technology. The design addresses the problem of unstable seed posture and inconsistent seed position within a single seed chamber during high-speed seeding in belt-type seed conveying devices. Key technical points include: the designed seed posture correction element consists of five parallel transverse stripes. When a soybean seed contacts the first transverse stripe, it is adjusted so that the seed's long axis is perpendicular to the direction of the seed conveying belt, thus stabilizing the seed delivery. By analyzing the seed's state during the collision deformation and recovery stages, the theoretical two-dimensional seed delivery position within the correction zone is determined. EDEM discrete element simulation software is used to conduct simulation experiments on the optimal height of the correction stripes. The tilt angle qualification rate and offset qualification rate are used as evaluation indicators. Single-factor experiments are conducted to analyze the seed displacement curve from the limiting-correction transition stage to the end of the correction stage, clarifying the effect of the correction stripe height on the lateral movement of the seed. Comparative experiments show that the posture variation coefficient and plant spacing variation coefficient of the belt seed guide device with correction elements are lower than those of the belt seed guide device without correction elements, which can meet the requirements of high-speed precision seeding operations.

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