果蔬三维切丁机改进仿真模型及试验  

Improved simulation model and test of three-dimensional dicing machine for fruits and vegetables

作　　者：靳合琦 胡建平[1] 杨德勇[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《食品与机械》2016年第7期72-75,共4页Food and Machinery

基　　金：江苏省农机三新工程(编号:NJ2013-14)

摘　　要：针对已有果蔬三维切丁断面易出现大弧形、倾斜等问题,采用虚拟样机技术,建立切丁机三维模型,并将其导入机械系统动力学分析软件ADAMS中,仿真分析推进滚筒与横切刀转速比在0.11~0.22、推进滚筒中心与横切刀中心水平间距在260~305 mm时切得的不同丁断面形状。仿真结果表明,引起切丁断面倾斜的主要因素是推进滚筒转速和横切刀转速的不匹配,当推进滚筒与横切刀之间的中心水平间距为280~300 mm、转速比n_1/n_2为0.11~0.22时,可取得较理想的切丁断面,其断面形状比较平直。为验证所得结论,在推进滚筒中心与横切刀中心水平间距290 mm、转速比为0.17条件下,分别进行10,15,20 mm 3种规格的切削性能试验,试验结果表明切出的3种规格丁断面形状规整,断面偏差小,其断面相对偏差百分数最大为12.7%,达到了国外同类先进产品质量标准。A virtual prototype technology was used to solve the problems of large arc and tilt of the diced section in three-dimensional dicing machines for fruits and vegetables,processing in this paper. A three-dimensional model was established and was imported into the mechanical system dynamics analysis software ADAMS. Different shapes of diced section were achieved when changing the rotator speed ratio from 0. 11 to 0. 22 and the central horizontal spacing between the impeller and the cross were cut from260 mm to 310 mm. Simulation results showed that the main factor causing the incline of dicing section was the mismatch of speed between the pushing rotator and the cross cutting knife. The ideal dicing section with comparatively straight shape was achieved when the horizontal spacing between the pushing rotator and the cross-cutting knife center was 280 ~ 300 mm and speed ratio was 0. 11 ~ 0. 22. And then a cutting performance test of three sizes of 10 mm,5 mm and 20 mm was conducted when the center distance is 290 mm and speed ratio is 0. 17 between the pushing rotator and cross-cutting knife. The results showed that the neat dicing section shapes with small section deviation of three sizes were cutting out,among which maximum percentage of the section relative deviation was 12. 7%,and our products could be up to the standards similar as the advanced international ones.

关 键 词：果蔬 切丁机 断面形状 仿真 试验 

分 类 号：TS255.35[轻工技术与工程—农产品加工及贮藏工程]