仿鼹鼠足趾排列的旋耕-秸秆粉碎锯齿刀片设计与试验

随着保护性耕作的不断发展,实际作业中对旋耕刀性能要求愈发严格,该文在国标旋耕刀基础上,将正、侧切削刃上设计成锯齿状,然后考察实际作业过程中功耗、受力以及作业质量,检测仿鼹鼠足趾排列的旋耕-秸秆粉碎锯齿刀片的田间作业功耗和作业质量。针对该锯齿刀片和国标旋耕刀片在有秸秆颗粒和无秸秆颗粒下进行仿真分析,对比可知：在有秸秆颗粒下,由于刀具要与秸秆接触并发生挤压和剪切作用,从而导致受力以及扭矩值较大。结合理论分析,利用扭矩传感器对仿生锯齿刀和国标旋耕刀进行田间试验。根据0.5 m×0.5 m地表设置不同质量秸秆,分别为0、0.375和0.75 kg（0%、50%、100%）,测定拖拉机输出扭矩以及功耗,...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. 6; pp. 43 - 50
Main Author 郭俊 张庆怡 Muhammad Sohail Memon 姬长英 赵正
Format Journal Article
LanguageChinese
Published 信德农业大学农业工程学院,登多贾姆,巴基斯坦 70060 2017
南京农业大学工学院,南京,210031%南京农业大学工学院,南京 210031
Subjects
仿生
作业质量
农业机械
扭矩
旋耕刀
离散元仿真
锯齿刀
agricultural machinery
离散元仿真
torque
仿生
作业质量
rotary blade
working quality
discrete element simulation
扭矩
serrated rotary blade
锯齿刀
bionic
旋耕刀
农业机械
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2017.06.006

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Summary:随着保护性耕作的不断发展,实际作业中对旋耕刀性能要求愈发严格,该文在国标旋耕刀基础上,将正、侧切削刃上设计成锯齿状,然后考察实际作业过程中功耗、受力以及作业质量,检测仿鼹鼠足趾排列的旋耕-秸秆粉碎锯齿刀片的田间作业功耗和作业质量。针对该锯齿刀片和国标旋耕刀片在有秸秆颗粒和无秸秆颗粒下进行仿真分析,对比可知：在有秸秆颗粒下,由于刀具要与秸秆接触并发生挤压和剪切作用,从而导致受力以及扭矩值较大。结合理论分析,利用扭矩传感器对仿生锯齿刀和国标旋耕刀进行田间试验。根据0.5 m×0.5 m地表设置不同质量秸秆,分别为0、0.375和0.75 kg（0%、50%、100%）,测定拖拉机输出扭矩以及功耗,并依照国标测试方法测定作业质量。田间试验得到扭矩与仿真变化趋势一致。当地表无秸秆和地表含50%秸秆时,锯齿刀片扭矩分别为404.05和438.33 N·m;国标旋耕刀片上扭矩分别为389.27和443.79 N·m。当地表秸秆质量分数为100%时,锯齿刀和国标旋耕刀片上扭矩分别为557.92和507.34 N·m。耕作后地表秸秆和土壤评价结果显示：不同质量含量秸秆覆盖下,仿生锯齿刀耕作后的秸秆掩埋率、土壤破碎率、长度≤15 cm秸秆比例等方面都优于国标旋耕刀。田间试验和仿真结果都显示当地表覆盖秸秆量为0%和100%时,仿生锯齿刀的扭矩高于国标旋耕刀。虽然仿生锯齿刀只在秸秆覆盖量为50%时扭矩与功耗优于国标旋耕刀,但在3种秸秆覆盖量下仿生锯齿刀的耕后地表质量都明显优于国标旋耕刀。综上考虑,在实际作业中,可适当收集田间秸秆。该研究为实现只应用一种刀片来完成旋耕和秸秆粉碎2种不同作业目标提供了参考。
Bibliography:11-2047/S
Tillage practice is one of the energy-consumed links in agricultural production,while the energy can be saved through proper management of blade geometry.In case of rotary tillage,the geometry of sidelong edge,lengthwise edge and transition edge plays a pivotal role in the energy consumption and working performance in the field.The continuous development of the conservation tillage puts forward higher requirements for the performance of rotary blade.In order to manage the rotary tillage process reasonably,the power consumption and working performance of blade should be better understood.In this paper,the sidelong edge and lengthwise edge of the national standard blade were designed as serrated ones and the bionic-shape transition edge was devised according to the arrangement of mole＇s toes,and later the power consumption and working performances of the bionic serrated blade and the national standard blade were investigated in the field.Meanwhile,the performances of both blades were also studied in so
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.06.006