摘要
受东方蝼蛄刺状挖掘足能够高效挖掘土壤的启发,设计了大豆播种机破碎式覆土装置,以提高其碎土性能。对东方蝼蛄前足的趾爪趾长、趾尖角、趾间距、侧面的楔角进行测量,以此为依据设计了仿生碎土圆盘。破碎式仿生覆土装置由大小碎土圆盘、折弯法兰、固定机架、旋转副、减震弹簧和悬挂架组成。本覆土装置专为双行种子沟设计,可实现对大豆沟槽双侧进行覆土。对仿生碎土圆盘碎土齿进行了受力分析,并利用Ansys及Ls-Dyna软件对所设计部件进行仿真优化分析,得到碎土圆盘切削受力情况土壤的等效应力分布以及覆土过程中种子横向位移。田间试验结果表明破碎式仿生覆土装置完成了覆土功能要求,破碎率达到92.2%,平均覆土厚度为2.4 cm,平均种子行间距为10.1 cm。
Inspired by the efficient mining of soil function of the oriental mole cricket claws,crushing soil covering device was put forward to improve the performance of the broken soil. The toe claws of the oriental mole cricket forefoot and toe high angle,toe distance and lateral wedge angle were measured,on the basis of this,the bionic soil crushing disc was designed. The crushing type bionic soil covering device consisted of discs of big and small,bending flange,fixed frame,rotating pair,damping spring and suspension frame. The covering soil device was designed for double row seed groove,which can be used to cover the soil of two sides of soybean grooves. Ansys and Ls-Dyna softwares were used to simulate and analyze the designed components. Through the simulation analysis of the crushing bionic soil covering device,the soil broken process was simulated actually and intuitively. The cutting force and equivalent stress distribution of soil and lateral displacement of soil were obtained. Through the analysis of equivalent stress of broken soil,the equivalent stress was greater than the shear strength of the dry soil which ensured the broken effect on the dry soil. Field test results showed that the crushing bionic soil covering device completed the function requirements of soil covering,and had strong soil fragmentation and the crushing rate was 92. 2%,the average thickness of covering soil was 2. 4 cm,and the average seed spacing was 10. 1 cm.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2018年第2期34-40,73,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2017YFD0701103)
国家重点研发计划-政府间国际科技创新合作重点专项(S2016G4501)
关键词
大豆播种机
覆土装置
破碎式
仿生
soybean seeder
soil covering device
crushing
bionic
