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| 收获期马铃薯茎秧切割强度的试验研究 |
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李晓军1,2, 孙伟1, 张涛3, 刘小龙1, 张华1
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| (1.甘肃农业大学 机电工程学院, 兰州 730070;2.甘肃畜牧工程职业技术学院, 甘肃 武威 733006;3.甘肃农业大学 农学院, 兰州 730070) |
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| 摘要: |
| 针对现有马铃薯杀秧机存在杀秧阻力大，打碎长度合格率低，带薯率高，作业效率低等问题，采用Box-Behnken试验设计原理，依照三因素三水平响应面分析方法建立切割方式、切割速度、切割高度与切割强度的数学模型，对各因素之间的交互作用进行分析，并对刀型和切割方式进行单因素试验研究。结果表明：刀型和切割方式对马铃薯茎秧的切割强度均达到极显著影响（P<0.01），锯齿刀优于光刀，滑切优于正切；切割方式，切割高度对切割强度影响极显著（P<0.01），切割速度对切割强度影响较显著，三因素的交互作用均不显著（P>0.05）；切割方式、切割高度和切割速度对马铃薯茎秧切割强度的影响依次由强到弱。 |
| 关键词: 马铃薯 切割强度 力学特性 切割试验 |
| DOI：10.11841/j.issn.1007-4333.2018.11.18 |
| 投稿时间：2018-01-27 |
| 基金项目:国家自然科学基金项目（51765004）；甘肃农业大学伏羲人才项目（GAUFX-02J01）；马铃薯产业体系（CARS-10-P18） |
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| Experimental study on the cutting strength of potato vine during harvest |
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LI Xiaojun1,2, SUN Wei1, ZHANG Tao3, LIU Xiaolong1, ZHANG Hua1
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| (1.College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou 730070, China;2.Gansu Polytechnic College of Animal Husbandry & Engineering, Wuwei 733006, China;3.Agronomy College, Gansu Agricultural University, Lanzhou 730070, China) |
| Abstract: |
| In order to solve the problems of existing potato seedling killing machine including high resistance to seedling, low rate of breaking length, high tuber rate and low operation efficiency, a Box-Behnken experimental design with three factors and three levels was performed. Parameters influencing cutting vine efficiency such as cutting type, cutting speed and cutting height were selected as independent variables. A mathematical model was established, and the effects of various parameters and their interactions were analyzed as well. The results of multi-factor test showed that the cutter and the cutting type had very significant effect on the cutting strength of potato vine (P<0.01), the cutting strength with serrated blade was smaller than smooth blade in the way of slide cutting; cutting type and cutting height had a highly significant effect on the cutting strength of potato vine (P<0.01). The cutting speed also had significant influence on the cutting strength. The interaction of the three factors was not significant(P>0.05), The order of influence on cutting strength was cutting type, cutting height and cutting speed. |
| Key words: potato cutting strength mechanical properties cutting experiment |
