小型甘蔗收获机切割器振动对切割力的影响  

Effect of the vibration of small sugarcane harvester cutters on the cutting force

作　　者：张彪[1] 李尚平[1,2] 周敬辉 钟家勤[3] 杨代云[1] 莫瀚宁 ZHANG Biao;LI Shangping;ZHOU Jinghui;ZHONG Jiaqin;YANG Daiyun;M(College of Mechanical Engineering,Guangxi University,Nanning 530004,China;College of Chemistry and Chemical Engineering,Guangxi University For Nationalities,Nanning 530008,China;College of Mechanical and Marine Engineering,Qinzhou College,Qinzhou 535000, China)

机构地区：[1]广西大学机械工程学院,南宁530004 [2]广西民族大学化学化工学院,南宁530008 [3]钦州学院机械与船舶海洋工程学院,钦州535000

出　　处：《振动与冲击》2018年第1期229-235,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51465006);广西制造系统与先进制造技术重点实验室开放课题(11-031-12S04);广西高校临海机械装备设计制造及控制重点实验室课题(GXLH2014KF-04)

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。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.

关 键 词：甘蔗收获机 振动 切割力 宿根切割质量 

分 类 号：TH16[机械工程—机械制造及自动化] S225.53[农业科学—农业机械化工程]