Authors

Abstract

In order to explore the interaction between the axial-flow threshing unit and the agricultural materials, the vibration signal of the axial-flow threshing unit and the stress signal of the internal threshing tooth under the dynamic threshing condition were detected by using the three-way acceleration sensors and the resistance strain gauges. The results show that under the dynamic threshing condition, the amplitude of the vibration signal along the axial direction of the threshing unit experienced a small change, but changed greatly at the feeding direction of materials and vertical direction of fixed bearings, which was mainly caused by the internal impact between the threshing unit and the materials;Under the impact of materials, the threshing element of each measuring point has a continuous peak value of stress signal, and the stress signals gradually decreased along the axial direction. This study further reveals the interaction mechanism between axial-flow threshing unit and materials from the perspective of vibration and impact, and provides new methods for the development of condition detection technology of grain harvesting equipment

Abstract in English

脱粒装置内部与物料作用情况极其复杂，为探究轴流脱粒装置与物料之间的相互作用情况，采用三向加速度传感器和电阻应变片，实现了动态脱粒工况下轴流脱粒滚筒的振动信号及内部脱粒元件的应力信号的检测。结果表明：轴流脱粒滚筒由空转变化至脱粒工况，沿物料轴向运动方向振动幅值变化较小，沿物料喂入方向和轴承座上下方向的振动幅值变化较为明显；各测点脱粒元件受冲击载荷作用而出现连续的应力峰值，且大小沿轴向逐渐降低。本研究从振动和冲击应力的角度进一步揭示了轴流脱粒装置与物料之间的相互作用机理，为谷物收获装备工况检测技术的发展提供了新的方法和思路.