秸秆捆扎过程中打结钳嘴载荷试验分析  

Load Experimental Analysis of Bill Hook during Straw Baling

作　　者：陈龙健[1] 李诚[1] 张安琪[1] 李海涛[1] 张绍英[1] 韩鲁佳[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》2015年第9期128-134,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：教育部长江学者和创新团队发展计划资助项目(IRT1293);北京高校青年英才计划资助项目(YETP0317)

摘　　要：打结钳嘴是打结器承载的关键部件,为研究其在秸秆捆扎打结过程中的载荷情况,利用华德9YFQ-1.5系列压捆机开展了秸秆捆扎试验,由张力传感器、高速摄影机以及同步控制装置组成的试验方案,成功获取了秸秆捆扎过程中捆绳张力数据和捆绳对打结钳嘴的作用部位;研究构建了捆绳张力与打结钳嘴载荷的转换模型,结果显示捆绳对上颚的载荷较大,达到了314.89 N;通过上述所获得的捆绳对打结钳嘴载荷大小和作用位置,利用ANSYS对上颚进行相关有限元分析,得到上颚在捆绳张力最大时刻的应力载荷图,发现上颚安装滚子轴处和上颚拐角处均有较大的承载特性,其应力载荷分别为755.52 MPa和410.29 MPa。打结钳嘴实际工作过程中断裂位置验证了载荷分析的准确性,为优化打结钳嘴提供了基础数据支撑。Bill hook is a key part of D-bale knotter during load bearing. For the research on its mechanical analysis, baling experiment was carried out by using Huade 9YFQ - 1.5 baler. The experimental scheme of tension sensor, high-speed camera and synchronous control was firstly proposed. The rope tension and acting position between rope and knotter during crop residue baling were obtained The transfer model of rope around stump was built. The results showed that the largest loading between rope and bill hook was 314. 89 N. Based on the loading and acting position, the finite element mechanical analysis of bill hook was performed by ANSYS. The results showed that the stress concentration happened at the shaft end of bill hook and comer. The stress achieved to 755.52 MPa and 410. 29 MPa, respectively. The observed broken position of bill hook during straw baling was also compared with the results from the finite element mechanical analysis. The results showed that the simulated data agreed well with the experimental data. This study will provide basic data for the optimization of bill hook.

关 键 词：秸秆 捆扎 打结器 打结钳嘴 载荷分析 

分 类 号：S225[农业科学—农业机械化工程]