基于ANSYS的大耕深旋耕刀结构优化设计  

Optimal Design on Structure of Rotary Blade with Big Tilling Depth Based on ANSYS

作　　者：王荣[1] 王宏宇[2] 金镜[2] 袁晓明[2] 曹秀洪[1] 

机构地区：[1]泰州职业技术学院机电技术学院,江苏泰州225300 [2]江苏大学机械工程学院,江苏镇江212013

出　　处：《农机化研究》2015年第5期136-139,共4页Journal of Agricultural Mechanization Research

基　　金："十二五"国家科技支撑计划项目(2011BAD20B08);江苏大学高级专业人才科研启动基金项目(11JDG126)

摘　　要：通过对现有 R245旋耕刀的建模及静力学分析，以旋耕刀主导用材之一65Mn 的屈服强度为依据，确定了R245旋耕刀所承受的极限载荷与工作载荷。采用等比例放大的方法，以 GB／T5669－2008规定的 R245旋耕刀结构为基础，设计了刀尖回转半径为300mm 旋耕刀（其耕深可达20～22cm），同时以同比例放大确定了 R300旋耕刀的极限载荷与工作载荷，基于 ANSYS 软件对所设计的 R 300旋耕刀在工作载荷下的应力场进行了模拟，并基于模拟结果重点对其刀刀柄尺寸进行了优化。结果表明：当刀柄厚度增加到25mm、刀柄宽度增加到40mm后，R300旋耕刀不仅在工作载荷下不会失效而且在极限载荷下也不会失效。The limit load and service load the rotary blade bear , according to the yield strength of 65 Mn that is one of leading materials of rotary blade , were determined through modeling and statics analysis of existing R 245 rotary blade . The R300 rotary blade with 20-22 mm tilling depth was designed by adopting the amplification method in equal proportion based on the structure of R 245 rotary blade stipulated by GB/T5669-2008 .Meanwhile , the limit load and service load of the R300 rotary blade were determined with the same proportion , and the stress field of the R 300 rotary blade with the service load was simulated .Moreover, the hilt size of the R300 rotary blade was optimized based on simulated result .Re-sult shows that the optimized R 300 rotary blade is never invalidated with not only the service load but also the limit load when the hilt thickness is increased to 25mm and the hilt width is increased to 25mm.

关 键 词：旋耕刀 大耕深 优化设计 刀柄尺寸 

分 类 号：S222.3[农业科学—农业机械化工程] S220.3[农业科学—农业工程]