【摘要】 针对小型甘蔗收获机切割器振动导致破头率高的问题,通过设计不平衡质量块构建切割器的激振源,模拟切割器的动不平衡,实现了刀盘的可控振动,并通过力学计算、仿真验证了试验的可行性。通过仿真及物理试验平台砍蔗试验,探究了刀盘振动对切割力,以及切割力对宿根切割质量的影响关系及作用机理。仿真表明,当切割力最大时,轴向切割力约占总切割力的92.6%;试验表明,振动对切割力影响显著,在1.02~1.20 mm振幅范围内切割力呈线性上升趋势;轴向切割力与宿根切割质量的相关系数为0.91~0.95,刀盘振动对甘蔗宿根切割质量的影响主要是通过轴向切割力的作用来实现的。更多还原

【Abstract】 Aiming at the small sugarcane harvester cutter ’s vibration leading to the high broken rate of sugarcane ratoon,unbalanced mass blocks were designed to build an excitation source to simulate the cutter’s dynamic imbalance and to control the cutter’s vibration. The feasibility of the tests was verified through mechanical calculations and simulations.To explore the effect of cutter’s vibration on the cutting force and the effect of cutting force on the ratoon cutting quality,both simulations and physical tests were carried out. The simulation results show the axial cutting force accounts for about92. 6 % of the total cutting force when the force reaches maximum. The test results show that the vibration has a significant influence on the cutting force and the cutting force shows a linear upward trend in the scope of the amplitude of 1. 02 —1.20 mm. The correlation coefficient between the axial cutting force and ratoon cutting quality is from 0. 91 to 0. 95. When the amplitude changes,the axial cutting force is the main influential factor on the ratoon cutting quality of sugarcanes.更多还原