Authors

Abstract

This study introduced a vertical straw shredding device that integrates both cutting and shredding functionalities, with the crucial components of the blade designed in a bionic serrated pattern. In order to explore the interaction mechanism between the vertical cutting blade and straw, a mechanical model of the cutting force has been developed. Based on the ANSYS-LYNA software, a cutting model for straw-bionic blades has been established. Regarding the test factors, i.e., the spindle speed, blade installation angle,forward velocity, and blade tilt angle, single-factor and orthogonal tests were also performed. Furthermore, the maximum equivalent stress experienced by straw was taken as the primary evaluation index.Accordingly, the results revealed the influencing parameters to be ordered as the blade installation angle> spindle speed > forward speed > blade tilt angle. the optimized parameters for the cutting blade were determined to be a spindle speed of 1400 r/min, an installation angle of 55°, a forward speed of 4.0 km/h, and a blade tilt angle of 0°. Similarly, the optimized parameters for the shredding blade were established as a spindle speed of 1400 r/min, an installation angle of 50°, a forward speed of 4.0 km/h, and a blade tilt angle of 0°.

Abstract in Chinese

本研究设计了一种集成切断和切碎功能于一体的纵向秸秆切碎装置，关键部件刀片设计为仿生刃形式。为探究纵置切刀-秸秆互作机理,建立纵置切刀切割力学模型. 基于ANSYS-LYNA软件建立秸秆-仿生切刀切割模型，以刀轴转速、刀片安装角、前进速度和刀片倾斜角等试验因素，以切断刀和切碎刀切割秸秆过程秸秆所受最大等效应力为评价指标进行单因素和四因素四水平正交试验。试验结果表明刀轴转速、切刀安装角及行进速度对秸秆所受最大等效应力有显著影响，显著性顺序为切刀安装角>刀轴转速>行进速度>刀片倾斜角，切断刀在试验因素范围内的较优参数组合为刀轴转速1400r/min、刀片安装角55°、行进速度4.0km/h及刀片倾斜角0°，切碎刀在切割试验因素范围内的较优参数组合为刀轴转速1400r/min、刀片安装角50°、行进速度4.0km/h、及刀片倾斜角0°。