种薯水射流切口质量仿真分析与试验研究  

Simulation Analysis and Experimental Study on Quality of Seed Potato Water Jet Notch

作　　者：陈肖 杨振宇[1,4] 刘发英 孙卫孝[1] 韩梦杰 李学强 魏忠彩 Chen Xiao;Yang Zhenyu;Liu Faying;Sun Weixiao;Han Mengjie;Li Xueqiang;Wei Zhongcai(Shandong University of Technology,College of Mechanical Engineering,Zibo 255000,China;Shandong University of Technology,College of Electrical and Electronic Engineering,Zibo 255000,China;Shandong University of Technology,School of Agricultural Engineering and Food Sclence,Zibo 255000,China;Shandong Sider Agricultural Equipment Co.Ltd.,Dezhou 253600,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000 [2]山东理工大学电气与电子工程学院,山东淄博255000 [3]山东理工大学农业工程与食品科学学院,山东淄博255000 [4]山东思代尔农业装备有限公司,山东德州253600

出　　处：《农机化研究》2024年第10期168-174,共7页Journal of Agricultural Mechanization Research

基　　金：山东省科技型中小企业创新能力提升工程项目(2021TSGC1420);国家自然科学基金项目(52105266);中国博士后科学基金面上资助项目(2021M701801)。

摘　　要：为了获取最佳切割压力和移动速度,提高水射流种薯切块的切口质量,首先论述了水射流种薯切块和金属刀具切块的机理,分析切口拉伸及塑性流变以及切割裂纹对种薯损伤的影响;然后建立种薯、水射流离散元模型和金属刀具的实体模型;最后进行二因素三水平仿真试验,并比对水射流切块和金属刀具切块的效果。结果表明:水射流出口压力250MPa、移动速度0.5m/s时,切割效果最好;水切过程中,种薯切面受力远小于刀切过程,最大受力为刀切的1/4;种薯应力集中于切口处,种薯切块无明显受力情况;种薯块茎切口处粘结键断裂数目小于刀切过程,水切对马种薯切口损伤更小,切割质量更好。In order to obtain the best cutting pressure and moving speed,the cutting quality of water jet seed potato was improved.Firstly,the mechanism of cutting seed potato by water jet and metal cutting tool was analyzed,and the effect of cutting crack on seed potato damage was analyzed.Then,the discrete element model of seed potato,water jet and solid model of metal cutting tool were established.Finally,two factors and three levels simulation tests are carried out to compare the effects of water jet cutting and metal cutting tool cutting.The experimental results show that the best cutting effect is achieved when the water jet outlet pressure is 250MPa and the moving speed is 0.5m/s.In the process of water cutting,the force on the surface of seed potato was much less than that of knife cutting,and the maximum force was 1/4 of that of knife cutting.In the process of water cutting,the stress of seed potato was concentrated in the incision,and the seed potato cut had no obvious stress.The number of bond breakage at the tuber incision of seed potato in the water cutting process was smaller than that in the knife cutting process,and the water cutting had less damage to the incision of seed potato and better cutting quality.

关 键 词：种薯 切块 水射流 离散元仿真 

分 类 号：S223.1[农业科学—农业机械化工程]