往复式双动刀灌木收割机设计与试验!  

Design and Experiment on Reciprocating Double Knife Shrub Harvester

作　　者：刘志刚[1,2] 王德成[1] 翟改霞[2] 刘贵林[2] 张宁[2] 郝兴玉[2] 

机构地区：[1]中国农业大学工学院,北京100083 [2]中国农业机械化科学研究院呼和浩特分院,呼和浩特010010

出　　处：《农业机械学报》2013年第S2期102-106,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十二五"国家科技支撑计划资助项目(2013BAD22B02);科技部科技型中小企业技术创新基金资助项目(12C26211500972)

摘　　要：针对旋转式切割器切割低龄小径级柠条时存在的茬口质量差、漏割率高、缠绕等难以适应柔弹性茎杆的问题,设计了一种利用无急回特性双曲柄摇杆机构带动两组刀片相向切割的往复式双动刀灌木收割机;分析了其割刀位移、速度、加速度与曲柄转角的关系,并对双动刀切割速比进行了分析与试验。结果表明:在机具前进速度v m为1.0 m/s、切割速比λq为1.6时收割2年生柠条效果最佳,其茬高不合格率为2.3%,破茬率为3.3%,漏割率为2.3%,重割率为2.7%,生产率为0.38 hm2/h。Aiming at poor stubble quality,high loss cutting rate and winding leakage for cutting young and small diameter caragana microphylla of rotary cutter,a kind of reciprocating double knife shrub harvester was designed,which using double crank and rocker mechanism with no fast-returning characteristic to drive two sets of knives move and cut in opposite direction.The relation between the displacement,velocity and acceleration of the cutter with crank rotation angle was analyzed.And the double-acting blade cutting speed ratio was analyzed and tested.The results showed that it was best to harvest 2 years old caragana microphylla by the machine when the machine forward velocity was 1.0 m/s and cutting speed ratio was 1.6.The fraction defective of stubble height was 2.3%,the broken stubble rate was 3.3%,the miss cutting rate was 2.3%,the recutting rate was 2.7%,and the productivity was 0.38 hm2/h.

关 键 词：双曲柄摇杆 双动刀 灌木收割机 设计 试验 

分 类 号：S776[农业科学—森林工程]