苎麻茎秆台架切割试验与分析
为了给苎麻收割机的研制提供切割理论基础,该文进行了苎麻茎秆切割参数的试验研究。该文利用自行设计的试验台架进行苎麻茎秆的切割试验,研究往复式单动刀及双动刀切割器不同刀片几何参数（刀片长度、刀刃类型）、不同切割线速度和不同茎秆喂入速度对切割性能（切割功耗、切割质量和综合评分值）的影响。根据各个因素特点,论文采用多因素正交试验的方法确立两水平因素（刀刃类型、刀片长度和动刀组数）的最优水平组合,然后固定两水平因素的最优水平组合,以切割线速度和茎秆喂入速度为试验因素进行二次回归正交旋转设计试验来获得因素的最佳参数。根据多因素正交试验结果,采用往复式双动刀切割器,选用锯齿刃长刀片（120 mm）为最优水平...
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| Published in | 农业工程学报 Vol. 32; no. 1; pp. 68 - 76 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
农业部南京农业机械化研究所,南京,210014
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-6819 |
| DOI | 10.11975/j.issn.1002-6819.2016.01.009 |
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| Summary: | 为了给苎麻收割机的研制提供切割理论基础,该文进行了苎麻茎秆切割参数的试验研究。该文利用自行设计的试验台架进行苎麻茎秆的切割试验,研究往复式单动刀及双动刀切割器不同刀片几何参数（刀片长度、刀刃类型）、不同切割线速度和不同茎秆喂入速度对切割性能（切割功耗、切割质量和综合评分值）的影响。根据各个因素特点,论文采用多因素正交试验的方法确立两水平因素（刀刃类型、刀片长度和动刀组数）的最优水平组合,然后固定两水平因素的最优水平组合,以切割线速度和茎秆喂入速度为试验因素进行二次回归正交旋转设计试验来获得因素的最佳参数。根据多因素正交试验结果,采用往复式双动刀切割器,选用锯齿刃长刀片（120 mm）为最优水平组合。根据二次回归正交旋转设计试验结果,当切割线速度为0.878 9 m/s、茎秆喂入速度为0.862 4 m/s时,单位长度割幅切割功率最小,为281.408 4 W;当切割线速度为1.161 4 m/s、茎秆喂入速度为0.711 7 m/s时,单位面积切割失败株数最少,为5.691 1株;当切割线速度为1.092 0 m/s、茎秆喂入速度为0.722 9 m/s时,评分值最高,为86.7180分。综合试验结果,苎麻切割试验理论最佳水平组合为：切割线速度1.092 0 m/s、茎秆喂入速度0.722 9 m/s,采用往复式双动刀切割器,选用锯齿刃长刀片（120 mm）,此时单位长度割幅切割功率为318.814 5 W,单位面积切割失败株数为6.006 4株。研究结果为后续苎麻收割机切割部件的研制以及切割行走速比的选择提供了基础理论数据。 |
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| Bibliography: | In order to provide optimal theoretical cutting parameters of ramie stalk for ramie harvester, the cutting test of ramie stalk was conducted on the self-designed test bench in this paper. The test studied the influences of different geometrical parameters of blade, cutting speed, and ramie stalk feeding speed of reciprocating single movable blade cutter and double movable blades cutter on the cutting performance. The 4 groups of common blades had 2 blade lengths（81 mm,rice wheat harvester blade; 120 mm, corn harvester blade） and 2 blade edge types（smooth-edge blade and serrated-edge blade）, and the blade widths of various groups were the same（76 mm, equal to the driving distance of cutter bar on the test bench）. Therefore, 5 factors were designed in the test： cutting speed, stalk feeding speed, blade edge type, blade length, and number of movable blades. Evaluation indices determined in the test were cutting power and number of failed stubbles（not cut off or broken）; the smaller the 2 indices were, the better |
| ISSN: | 1002-6819 |
| DOI: | 10.11975/j.issn.1002-6819.2016.01.009 |