李晓军,孙伟,张涛,王虎存,张旦主.收获期马铃薯茎秧切割及杀秧刀片设计与试验[J].干旱地区农业研究,2019,37(2):253~259
收获期马铃薯茎秧切割及杀秧刀片设计与试验
Design and test of potato haulm cutter at the harvest
  
DOI:10.7606/j.issn.1000-7601.2019.02.36
中文关键词:  马铃薯茎秧切割  杀秧刀片  等滑切角锯齿型切割  收获期
英文关键词:cutting of potato haulm  cutting blade  saw-tooth cutting with equal sliding angle  harrest
基金项目:国家自然科学基金资助项目(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)
作者单位
李晓军 College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou, Gansu 730070,China
Gansu Polytechnic College of Animal Husbandry & Engineering,Wuwei, Gansu 733006,China 
孙伟 College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou, Gansu 730070,China 
张涛 Agronomy College, Gansu Agricultural University,Lanzhou, Gansu 730070,China 
王虎存 College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou, Gansu 730070,China 
张旦主 College of Mechanical and Electrical Engineering,Gansu Agricultural University,Lanzhou, Gansu 730070,China 
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中文摘要:
      针对现有马铃薯杀秧机田间作业时存在杀秧阻力大、茎秧易缠绕等问题,依照Box-Behnken试验设计原理,以测试马铃薯茎秧切割强度为指标,建立了切割方式、切割速度、切割高度与切割强度的数学模型,并对各因素及其交互作用进行分析。结果表明:切割方式和切割高度对切割强度的影响极显著(P<0.001),切割速度对切割强度影响较显著(P<0.05)。应用对数螺线方程对锯齿型刀具进行进一步优化,设计了等滑切角锯齿型切割及粉碎刀片,通过对收获期马铃薯茎秧的切割及粉碎验证试验并与参照指标进行比较,结果表明:打碎长度合格率提高16.7%,留茬高度为45 mm,带薯率为0.15%,均优于参照标准。该文设计的刀片在杀秧过程中受力均匀,具有降低杀秧功耗、提高杀秧效率的作用,可以改进马铃薯杀秧机工作性能。
英文摘要:
      The existing machine for cutting potato haulm has some problems such as excessive cutting resistance,easy haulm entangling,and excessive fuel consumption. In order to solve these problems, a mathematical model for cutting type, speed, height and strength was established based on the principle of Box-Behnken test design and using the cutting strength of potato haulm as an indicator.The results showed that the cutting type and height had very significant effects on the cutting strength of potato haulm (P<0.001). The cutting speed also had significant influence on the cutting strength (P<0.05). This paper established a logarithmic spiral equation to further optimize saw-tooth blade. We designed a special equal slide-cutting angel saw-tooth blade for cutting potato haulm.The experiment of cutting and crushing potato haulm during harvest stage was carried out and compared with reference indexes. The results showed that under the same cutting conditions the qualified crush rate was increased by 16.7%and the rate of tuber-pullout was 0.15% compared with the ordinary blade and the stubble height was 45 mm. The stress was uniform in the process of removing haulm. The new design significantly reduced the fuel consumption and improved the cutting efficiency. This research has important significance in improving the performance of cutting machine for potato haulm.
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