【摘要】 为进一步优化设计烟草钵苗移栽机的关键部件,通过对移栽期北方烟草钵苗的测定,利用数理统计方法分析移栽期烟草钵苗的物理特性,得出烟草钵苗主要物理特性指标值的变化区间及分布频率。通过剪切试验对移栽期烟草钵苗茎秆的不同部位剪切载荷、抗剪强度及剪切功耗进行测试分析,得出烟草钵苗茎秆剪切部位对剪切破坏载荷及剪切功耗均存在显著影响(α=0.05),在距烟草钵苗钵体表面5~10mm处剪切破坏载荷和剪切功耗最大,抗剪强度均值为(1.10±0.12)MPa,试验可为北方烟草钵苗移栽部件的设计提供科学依据。更多还原

【Abstract】 In order to further optimize design the key components of tobacco seedling transplanting machine through the determination of northern tobacco seedlings during transplanting period. Analyzing the geometrical and physical characteristics of tobacco seedlings by mathematical statistics and obtain the variation range of the main geometrical characteristic index value and the frequency distribution of the tobacco seedlings. Through the experiment and analysis of shear stress,shear strength and power consumption of different parts of tobacco seedlings stem in the transplanting period,it is significant that the tobacco seedling stem cutting position influence the load on the shear failure、shear strength and shear strength of power( α = 0. 05). The shear failure load,shear power and shear strength at the tobacco bowl surface 5 ~10mm are the largest,and average value of shear strength is( 1. 10 ± 0. 12) MPa. The experiment results provide a scientific basis for the design of the transplanting parts of the tobacco seedlings in northern China.更多还原