林木联合采育机蜂窝结构进料辊关键技术与应用性能研究  

Analyses on key techniques and application performance of honeycomb feeding roller for forest combine harvester

作　　者：曲云飞 王典[1,2] 朱旭晨 QU Yunfei;WANG Dian;ZHU Xuchen(School of Technology,Beijing Forestry University,Beijing 10083;Key Laboratory of Forestry Equipment and Automation of State Forestry and Grassland Bureau,Beijing 100083)

机构地区：[1]北京林业大学工学院,北京100083 [2]林业装备与自动化国家林业和草原局重点实验室,北京100083

出　　处：《安徽农业大学学报》2021年第3期496-503,共8页Journal of Anhui Agricultural University

基　　金：国家重点研发计划“战略性国际科技创新合作”重点专项(2016YFE0203400);中央高校基本科研业务费专项资金项目(2016ZCQ08)共同资助。

摘　　要：针对机械化采伐作业中减少木材损伤的问题,提出一种基于辊型双V蜂窝结构的进料辊。结合相关的数学公式,推导出了辊型双V蜂窝结构的动态冲击模型,并通过有限元仿真结果得到了验证。对伐木工况低速冲击下辊型蜂窝的力学与吸能特性、动态响应、结构稳定性和结构效率等应用技术指标进行探究,并引入不同结构的辊型六角蜂窝进行参照对比。低速冲击下,辊型双V蜂窝相较于辊型六角蜂窝负泊松比效应更明显,结构效率更高且抗冲击性更强,结构稳定性更好,接触力更均匀。各辊型双V蜂窝结构冲击至ε=0.3时的各应力指标均满足1600 kg以下树木采伐工况需求。这为蜂窝结构进料辊的机械化应用与减少原木损伤提供了参考。Aiming at solving the problem of reducing wood damage in mechanized cutting operation,the Roller Honeycomb Feeding Roller(RHFR)was proposed.Combined with the relevant mathematical formulas,the dynamic impact model of Roller Double V-Wings Honeycomb(RDWH)was derived and verified by the finite element simulation numerical results.The mechanical and energy absorption characteristics,dynamic response,structural stability and structural efficiency of roller honeycomb under low speed impact under logging conditions were studied,and different shaped Roller Hexagonal Honeycomb(RHH)were investigated for reference.The RDWH,benefiting from the Negative Poisson's Ratio enhancement phenomenon in deformation,possessed higher structural efficiency,stronger impact resistance,better structural stability and larger contact area.When the impact of RDWH reached toε=0.3,all the stress indexes can meet the requirements of cutting conditions under 1600 kg.This provided an important reference for mechanized application of honeycomb feeding roller and reducing log damage.

关 键 词：采育机 进料辊 农林机械 树木损伤 

分 类 号：S776.3[农业科学—森林工程]