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由于菠萝植株密植、茎叶厚重、叶片重叠交错且含有丰富的韧性较强的菠萝叶纤维,因此,现有的菠萝叶粉碎还田机需重复作业两遍方能达到粉碎要求,存在作业难度较大且效率低、能耗高、压实土壤等问题。针对上述问题,该文设计了一种双辊式菠萝叶粉碎还田机。该机采用双辊式作业结构,配合双L改进型甩刀和直刀与定刀联合作业,一次工作有效对菠萝茎叶完成多次击打、切割作用,一次粉碎作业满足实际农艺需求。田间试验分析表明:菠萝叶粉碎合格率(粉碎后长度小于15 cm的菠萝叶所占的比重)稳定在90.8%,标准差为0.79,变异系数为6.22;菠萝头漏出地面高度合格率稳定在89.3%,标准差为1.43,变异系数为9.76;生产效率0.356 hm2/h,油耗54.14 kg/hm2,抛洒不均匀度0.59,整机工作可靠性、稳定性及生产指标均达到设计要求,满足实际农艺需求。
Because pineapple plant close planting, thick stems, leaves overlapping staggered and rich in toughness of the pineapple leaf fiber, therefore, the existing pineapple leaf crushing and returning machine to be repeated twice in order to achieve the smashing requirements, there are more difficult job Large and inefficient, high energy consumption, compaction of soil and other issues. In response to these problems, this paper designed a two-roll pineapple leaf crushing machine. The machine adopts double-roller operating structure, with the double L improved rejection knife and straight knife and fixed knife joint operation, a single job effectively to the pineapple stems and leaves to complete multiple hits, cutting effect, a crushing operation to meet the actual needs of agronomy. Field trial analysis showed that the passing rate of pineapple leaves (the proportion of pineapple leaves less than 15 cm in length after crushing) was stable at 90.8% with a standard deviation of 0.79 and a coefficient of variation of 6.22. The passing rate of pineapple heads at the ground level stabilized at 89.3 %, Standard deviation of 1.43, coefficient of variation of 9.76; production efficiency of 0.356 hm2 / h, fuel consumption of 54.14 kg / hm2, throwing non-uniformity of 0.59, machine reliability, stability and production targets meet the design requirements to meet the actual agronomic demand.