引用本文:[点击复制]
[点击复制]
【打印本页】 【在线阅读全文】【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 61次   下载 224 本文二维码信息
码上扫一扫!
全履带式再生稻收割机行走底盘碾压率的模拟与分析
雷志强,张国忠,彭少兵,卢康,付建伟,查显涛,周勇
0
(华中农业大学工学院,武汉430070; 湖北省现代农业装备工程技术研究中心,武汉 430070;华中农业大学植物科学技术学院,武汉 430070)
摘要:
为减少全履带式再生稻收割机收获再生稻头季时行走底盘对留桩的碾压率(履带碾压面积与收割面积的比值),以利于提高再生季水稻产量、并改善再生季稻米品质,基于履带式车辆设计理论,以割幅Z、轨距B、履带接地长度L、履带宽度b、转向半径R0、底盘中心轴线与割台割刀纵向距离X为影响因素,建立了全履带式再生稻收割机行走底盘结构模型及其田间直行转弯碾压模型,以种植行距i,株距c,穴径br的水稻为对象,对上述各参数对碾压率的影响规律进行了分析,结果表明,其他参数相同条件下,直行时,碾压率δ1随割幅Z与履带宽度b的比值增加而减小;转弯时,全履带式再生稻收割机碾压率δ2随转向角度θ增大而减小,随转向半径R0的增大而减小;碾压率不受底盘中心轴线与割台割刀纵向距离X的影响;轨距B以及割幅Z与轨距B之差为行距和株距的公倍数时有利于减少碾压率;在相同接地比压条件下,割幅Z增加有利于减少碾压率。为减少碾压率,全履带式再生稻收割机结构设计时,在满足接地比压前提下,应减少履带宽度b和接地长度L,增大割幅Z,轨距B取行距和株距的公倍数,割幅Z与轨距B之差为行距和株距的最小公倍数,采用回转式行走路径;结合田块形状与面积,优先选用较大转向半径R0;在农艺上,建议水稻种植行距与株距有整数倍关系。
关键词:  再生稻  收割机  履带底盘  碾压率  模拟  建模
DOI:10.13610/j.cnki.1672-352x.20170811.002
基金项目:863计划子课题(2014AA10A605-8), 中央高校基本科研业务费专项(2014PY043)和湖北省水稻农技推广(4005-453150010302)共同资助。
Simulation and analysis of the stubble pushing rate by chassis of the completely tracked harvester for the ratoon rice
LEI Zhiqiang,ZHANG Guozhong,PENG Shaobing,LU Kang,FU Jianwei,ZHA Xiantao,ZHOU Yong
(College of Engineering, Huazhong Agricultural University, Wuhan 430070; Modern Agricultural Equipment Engineer Technology Research Center of Hubei Province, Wuhan 430070;College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070)
Abstract:
Reducing the rate of stubble pushing (Ratio between the pushed stubble area and the area of harvesting) by chassis of the completely tracked harvester in the mechanical harvest processing of the first crop of the ratoon rice can not only ensure the yield, but also improve the quality of the ratoon rice. Based on the tracked vehicles design theory, six influential factors were chosen to analyze: the width of the cutting range Z, the track gauge B, the length of the track on ground L, the width of the track b, the turning radius R0 , the longitudinal distance between the central axis of chassis and cuter of cutting platform X. Both a structure model of the chassis of the completely tracked ratoon rice harvester and a stubble pushing model (going straight and turning) in the field were established. Furthermore, a rice planting model was set as follows: its planting row spacing was i, hill spacing was c, and hill diameter was br in the field. And then the influences of various parameters on the stubble pushing rate were analyzed. Under the same planting conditions and the parameters of the completely tracked harvester, the results showed that the stubble pushing rate δ1 decreased with the ratio of Z to b increased when the harvester was on straight way; while on turning way, the δ2 decreased with the turning angle θ and R0 increased.
Key words:  ratoon rice  harvester  tracked chassis  the rate of stubble pushing  simulation  modeling

用微信扫一扫

用微信扫一扫