油菜联合收获机筛面粘附物摩擦特性

Tribological Characteristics of Adhesive Materials on Cleaning Sieve of Rape Combine Harvester

针对油菜联合收获机振动筛上的筛面粘附物堵塞筛孔、造成清选损失成倍增加等问题,分析了油菜筛面粘附物的主要成分及结构,得出了油菜筛面粘附物的尺度分布：77%集中在0.3-2.5 mm范围内,且不同尺度范围内筛面粘附物的主体成分明显不同。对油菜角果壳、主茎秆、枝茎秆和筛面粘附物与筛面基体间的摩擦特性进行了测定。结果表明：油菜茎秆、角果摩擦因数普遍随含水率的提高而增大,筛面粘附物与金属间的摩擦因数达到0.71。

The main ingredients and structure of rape adhesive materials on cleaning sieve were analyzed for sieve hole blocking and multiply increased cleaning loss caused by the adhesive materials.Size distribution of rape adhesive materials on cleaning sieve was obtained.77% of the adhesive materials＇ size were from 0.3mm to 2.5mm,and the main ingredients were distinctly different with different size range.Friction coefficient tests of rape nutshell,rape stalk the adhesive materials were carried out.It was pointed out that their friction coefficients were commonly increased with the raise of their moisture,and the friction coefficients between the adhesive materials and metal reached to 0.71.