摘要
This paper focused on the influence of the shape and size of threshing frames as well as the grades of tobacco leaves on the structure of threshed leaves.The testing tobacco leaves all came from the hilly ecological region of Nanling and belonged to burnt sweet,alcoholic sweet and scent category.The comprehensive evaluating value S was taken as the test index.Results showed that,without considering the influence of tobacco grade on leaf structure,the shapes of first-stage thresher five-link frames were all hexagons,and the combination with the sizes of 3.5,3.0,3.5,3.0,3.0 inches had the highest evaluating value S of 2.49.For tobacco grade C2FH,the shapes of first-stage thresher five-link frames were also hexagons,and the evaluating value S reached the highest value of 3.40 with sizes of 3.5,3.0,3.5,3.0,3.0 inches.Comprehensive analysis showed that:3.0 inch frame performed better in controlling the percentage of large-sized strips than 3.5 inch frame did;rhombic frames were better than hexagon frames in reducing the breakage rate of tobacco leaves;different shapes or sizes of nonadjacent two-link frames can help to improve the threshing quality.
以南岭丘陵生态区-焦甜醇甜香型烟叶为实验材料,综合评价值S为指标,探讨打叶框栏形状和尺寸组合以及烟叶等级对打后叶片结构的影响。结果表明,在不考虑烟叶等级对叶片结构影响的情况下,一级框栏五联的形状均为六边形,尺寸依次为3.5、3.0、3.5、3.0、3.0英寸的组合获得最高综合评价值S,为2.49。当烟叶等级为C2FH,一级框栏五联的形状均为六边形,尺寸依次为3.5、3.0、3.5、3.0、3.0英寸时,综合评价值S最高,为3.40。综合分析得出:3.0英寸框栏比3.5英寸框栏有助于控制大片率,菱形框栏比六边形框栏有利于降低碎片率;不相邻的两联框栏采用不同的形状或尺寸有助于提高打叶质量。
基金
中国烟草总公司湖南省公司科技项目专项基金(HN2020KJ17,HN2020KJ14,HN2020KJ15,HN2020KJ16)。
