Mechanics Characteristics of Tray Nursery of Tobacco Seedlings
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摘要: 为设计机械化取苗机构，以山东农业大学温室大棚培育的“革新一号”移栽期烟草钵苗为试验材料，在万能试验机上对烟苗进行了钵苗拔取、烟苗茎秆拉伸、压缩、弯曲和剪切力学性能试验。结果表明，营养基质含水率为（52.70±6.50）%时，烟苗拔取力为（2.09±1.28）N；烟苗茎秆含水率为（85.15±2.21）%时，烟苗茎秆抗拉强度为（1.96±0.68）MPa；烟苗茎秆径向抗压强度以及底部、中部的轴向抗压强度分别为（0.096±0.043）、（1.20±0.34）、（1.28±0.28）MPa；简支梁、悬臂梁弹性模量分别为（0.0042±0.0018）、（0.0130±0.0062）MPa；剪切强度为（1.64±0.39）MPa。此结果为机械化取苗机构的设计提供了理论依据。Abstract: In order to design a mechanized seedlings pickup machine, ‘Gexin 1’ tobacco seedlings, which was in nurture transplanting period, were taken from the greenhouses of Shandong Agricultural University as test material. Some mechanical properties of the seedlings such as plucking force, tension and compression intensities of the seedlings stem, bending intensity, and shearing intensity were carried out with a universal test machine. The results showed that the plucking force of tobacco seedlings was (2.09±1.28)N when the nutrient substrate moisture content was of (52.70±6.50)%;the stem tension intensity was of (1.96±0.68)MPa when the moisture content of the tobacco seedlings stem was of (85.15±2.21)%;the stem radial compression intensity and the axial compression intensity of the stem at the bottom and the central part were of (0.096±0.043), (1.20±0.34), (1.28 ±0.28)MPa, respectively;the charpy elastic modulus and the cantilever elastic modulus were of (0.0042±0.0018), (0.0130 ±0.0062) MPa;the shear intensity was of (1.64±0.39) MPa. The results provide a theoretical basis for the design of mechanized seedlings pickup machine.
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Keywords:
- tobacco seedlings /
- plucking force /
- tension intensity /
- compression intensity /
- elastic modulus /
- shear intensity
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[1] 尹国洪,陈巧敏,张瑞林. 旱地育苗栽植机械现状、发展趋势和前景[J]. 中国农机化,1997(5):9-11. [2] 张丽华,邱立春,田素博,等. 指针夹紧式穴盘苗移栽爪设计[J]. 沈阳农业大学学报,2010,41(2):235-237. [3] 孙国祥,汪小旵,何国敏,等. 穴盘苗移栽机末端执行器设计与虚拟样机分析[J]. 农业机械学报,2010,41(10):48-53. [4] 俞高红,刘炳华,赵匀,等. 椭圆齿轮行星轮系蔬菜钵苗自动移栽机构运动机理分析[J]. 农业机械学报,2011,42(4):53-57. [5] 叶秉良,俞高红,陈志威,等. 偏心齿轮-非圆齿轮行星系取苗机构的运动学建模与参数优化[J]. 农业工程学报,2011,27(12):7-12. [6] 刘继展,李萍萍,李智国. 番茄采摘机器人末端执行器的硬件设计[J]. 农业机械学报,2008,39(3):109-112. [7] 李秦川,胡挺,武传宇,等. 果蔬采摘机器人末端执行器研究综述[J]. 农业机械学报,2008,39(3):175-179. [8] 惠东志. 烟草自动移栽机取苗机构设计与试验研[D]. 长沙:湖南农业大学,2010. [9] 邓明军. 烟草的炼苗、拔苗和移栽[J]. 农家参谋,2006(3):10. [10] 李玉道,杜现军,宋占华,等. 棉花秸秆剪切力学性能试验[J]. 农业工程学报,2011,27(2):124-128. [11] 杜现军,李玉道,颜世涛,等. 棉杆力学性能试验[J]. 农业机械学报,2011(4):87-91. [12] 李世祥,丁伟,朱忠彬,等. 烟叶基础设施信息化管理系统的设计与实现[J]. 中国烟草科学,2013,34(2):99-103.
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