The ability to efficiently remove impurities from harvested sugarcane billets is one of the key performance indicators of sugarcane chopper harvester. The state of motion and spatial distribution of billets thrown into the extractor fan by chopping rollers affect the process of impurity removal. However, little effort has been directed to the research of the trajectory of billets expelled by chopping rollers. Focusing on this problem, the trajectory of billets expelled by chopping rollers was studied by first theoretical analysis, followed by constructing a test bench and investigation by high-speed photography. In this paper, a test bench based on the dimensions and components of the 4GDLS-132A sugarcane combine chopper harvester was developed, encompassing the various stages of the harvesting process, including stalk conveying, chopping, impurity removal and billet expulsion. Based on projectile theory, kinematic models of billets during the throwing process were established with and without the aid of guiding channels. Following this, the relationship of the upper throwing angle and the resulting declination was obtained, and a guiding channel was designed between the chopper and extractor fan. High-speed photography was utilized to analyze and track the trajectory of expelled billets from the chopper under experimental investigation. The spatial trajectory of the billet was obtained, thereby verifying the existence of different upward throwing trajectories in three different regions during the throwing process of billets. Comparing and analyzing the trajectory at different throwing angles, it was concluded that the billet trajectory was ideal when the rotational speed of the chopper was 470 rpm and the throwing angle was 34°. Under these conditions, the angle adjusting plate of the guiding channel has a better inclination angle of 30°. The research results in this paper can provide a basis for determining the ideal relative positions of the chopper and extractor fan when designing a sugarcane harvester and also provide a reference for studying the expulsion trajectory of stalk crop segments.

中文翻译：

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甘蔗收割机切碎辊排出的钢坯轨迹的研究

有效地从收获的甘蔗坯料中除去杂质的能力是甘蔗切碎机收获机的关键性能指标之一。切碎辊将钢坯扔入抽气机的运动状态和空间分布会影响杂质的去除过程。然而，很少有人致力于切碎辊排出的坯料的轨迹的研究。针对这个问题，首先通过理论分析研究了切碎辊排出的钢坯轨迹，然后建立了试验台并通过高速摄影进行了研究。本文基于4GDLS-132A甘蔗联合斩波收获机的尺寸和组件开发了一个试验台，涵盖了收获过程的各个阶段，包括秸秆运输，切碎，杂质去除和钢坯排出。基于射弹理论，在有无引导通道的情况下，建立了抛掷过程中坯料的运动学模型。此后，获得了上抛角和所产生的偏斜的关系，并在切碎机和抽气机之间设计了一个导向通道。在实验研究中，利用高速摄影技术分析和跟踪了切碎机排出的钢坯的轨迹。获得了坯料的空间轨迹，从而验证了在坯料的抛掷过程中在三个不同区域中存在不同的向上抛掷轨迹。比较和分析不同投掷角度下的轨迹，得出的结论是，当切碎机的转速为470 rpm，投掷角为34°时，钢坯轨迹是理想的。在这种情况下，导向通道的角度调节板具有更好的30°倾斜角。本文的研究结果可为确定甘蔗收割机设计斩波器和抽风机的理想相对位置提供依据，并为研究秸秆切段的排出轨迹提供参考。