基于有支撑切割原理的免耕防堵装置有限元分析  

Finite Element Analysis and Experiment on Anti-blocking Device Based on Support Cutting

作　　者：卢彩云[1] 何进[1] 李洪文[1] 王庆杰[1] 张祥彩[1] 刘俊安[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2013年第S1期61-66,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51175499;51205398)

摘　　要：在我国华北一年两熟区保护性耕作地块进行播种作业时,关键是在保证防堵性能的前提下,降低能耗,提高播种性能。而有支撑切割作业时,由于外力的支撑作用,所需的切割力变小,从而能够降低能耗。以有支撑切割装置——浮动支撑式防堵装置为研究对象,采用ANSYS软件分别对其关键部件切割直刀和支撑板进行有限元静强度分析。切割直刀和支撑板承受载荷分别为切割秸秆和土壤的阻力、土壤和秸秆的支撑力,通过建立有限元模型,求解得到切割直刀和支撑板的应力分布图。结果表明,切割直刀的应力主要集中在孔心右侧x大于零区域和孔心至转折处区域,最大等效应力为2 151.2 Pa;支撑板的应力主要集中在圆弧板区域及平板靠近圆弧板的一端,最大等效应力为3.77×105Pa。田间试验表明,作业效果良好,作业过程中,切割直刀应力集中区未发生折弯,支撑板应力集中区没有发生变形。When planted in one year two crop area of China,it is important to reduce energy consumption and improve planting performance,and ensure the anti-blocking performance as well.When the support cutting was carried out,the cutting force needed became smaller because some of it was got from external force.Taking support cutting device—floated support anti-blocking device as research object,the static strength finite element analysis of key components blade and support plate was conducted with ANSYS software.The load of blade came from resistance of cutting straw and soil,and the load of support plate came from holding power of straw and soil.On the basis of established finite element model,a series of stress figures were obtained after calculation.The result indicated that the stress of blade mainly focused on x > 0 area of right hole heart,and the area from hole heart to turning place.The maximum of equivalent stress was 2 151.2 Pa.The stress of support plate mainly focused on arc plate area and flat plate area closed to the arc plate side.The maximum of equivalent stress was 3.77 × 105Pa.The field experiment showed that the machine had a good working performance and deformation was not found on the blade and support plate.

关 键 词：免耕播种机 浮动支撑 防堵装置 静强度 有限元分析 

分 类 号：S223.25[农业科学—农业机械化工程]