基于离散元仿真的林间剩余物粉碎刀具设计及性能分析  

Design and Performance Analysis of Forest Residue Pulverizing Tool Based on Discrete Element Simulation

作　　者：杨春梅[1] 谭少林 丁禹程 孟繁伟 张滨 曲文 YANG Chunmei;TAN Shaolin;DING Yucheng;MENG Fanwei;ZHANG Bin;QU Wen(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学机电工程学院,哈尔滨150040

出　　处：《森林工程》2025年第2期369-378,共10页Forest Engineering

基　　金：国家林草装备科技创新园研发攻关项目(2023YG06)。

摘　　要：为提高林间剩余物粉碎效率、粉碎均匀度和机器运行稳定性,针对林间剩余物粉碎设计一种弧形斜刃粉碎刀具。通过对林间剩余物粉碎过程中受到的剪切、冲击作用进行力学和动力学分析,明确影响林间剩余物粉碎性能的主要因素及碎裂方式。基于离散元仿真试验,对比直刃刀具和斜刃刀具对林间剩余物粉碎性能的影响。仿真试验结果表明,在相同条件下粉碎林间剩余物时,相较于直刃刀具,斜刃刀具仿真的颗粒bond键数量、颗粒平均运动速度、平均粉碎功率、粉碎室壁所受的冲击和粉碎颗粒平均能量等性能指标均有所提升,使用斜刃刀具仿真粉碎程度高,粉碎粒度均匀,工作过程更加平稳。In order to improve the forest residue pulverizing efficiency,pulverizing uniformity and machine operation stability,the article designed a curved beveled blade pulverizing tool for forest residue pulverizing.Through the mechanical and kinetic analysis of the shear and impact effects on the forest residue pulverizing process,the main factors affecting the pulverizing performance of the forest residue and the fragmentation mode were clarified.Based on discrete element simulation,the effects of straight-edged and beveled-edged knives on the pulverizing performance of forest residues were compared,and the simulation results showed that,when pulverizing forest residues under the same conditions,compared with straight-edged knives,the performance indexes such as the number of particle bond keys,average particle motion speed,average pulverizing power,impact on the walls of the pulverizing chamber,and average energy of the pulverizing particles of the beveled-edged knife simulation were all improved,and the degree of pulverizing using beveled-edged knives simulation was high,with a uniform pulverizing granularity,and a smoother working process.

关 键 词：林间剩余物 粉碎 力学分析 刀具设计 离散元仿真 

分 类 号：TH122[机械工程—机械设计及理论] TK6[动力工程及工程热物理—生物能]