双螺旋旋耕埋草模型刀辊工作扭矩试验

Torque experiment of model rotary knife roller of double spiral rotary tillage and stubble-mulch machine

为研究双螺旋旋耕埋草刀辊对水田土壤耕整时的工作性能,以相似原理为理论依据,基于LabVIEW搭建扭矩测试平台,制作与原型大小比例为1∶2的模型刀辊,以工作扭矩为评价指标,以土壤含水率、前进速度、刀辊转速和耕深为试验因素,在室内土槽条件下对该模型刀辊的工作扭矩进行研究。单因素试验结果表明:在试验范围内,模型刀辊的工作扭矩随前进速度的增加而增大,随刀辊转速的增加而减小。选取L18(37)正交表,开展上述4因素对模型刀辊工作扭矩影响的正交试验,极差结果显示,土壤含水率、耕深、前进速度及刀辊转速对模型刀辊的工作扭矩的影响程度依次降低,方差分析结果显示,土壤含水率、耕深、前进速度对工作扭矩有极显著的影响,刀辊转速对工作扭矩影响不显著。

A model rotary knife roller based on similitude method was designed with 1/2real size to study the performance of the double spiral rotary tillage and stubble-mulch roller machine while it till in paddy soil.A test platform of 1/2size model roller for torque based on LabVIEW was designed.The indoor soil bin test of the 1/2size model roller was conducted and its working torque was chosen as evaluation indicator while moisture content of soil,forward speed,rolling speed and tilling depth were selected as influential factors.The results of single factor tests showed that torque increased with the increase of forward speed and tilling depth,and decreased with the increase of knife rolling speed in experiment range.The result of L18(37)orthogonal test showed that the influencing sequence on the knife roller torque from significant to common was soil moisture content,tilling depth,forward speed of the test platform and knife rolling speed.Soil moisture content,tilling depth and forward speed of the test platform affected significantly,while knife-rolling speed did not.It will provide a reference for the optimizing structure parameters,motion parameters and power choice of double spiral rotary tillage and stubble-mulch roller.