行星啮合式防滑地轮结构参数的优化及性能试验

针对免耕播种机地轮滑移率大造成漏播,影响播种质量的问题,该文提出了一种新型的行星啮合式防滑地轮机构,并通过试验对其进行了结构参数优化。以地轮直径、地轮宽度、垂直载荷、防滑齿伸出长度作为试验影响因素,地轮滑移率为响应指标,运用二次回归旋转正交安排试验,建立了滑移率与各影响因素之间回归数学模型。通过Dedign-Expert7.1软件对试验参数进行优化,确定地轮直径626mm、地轮宽度为112mm、轮垂直载荷214kg、防滑齿伸出长度28mm为最佳参数组合,此时滑移率为0.45%,对优化结果进行验证试验。试验结果表明,机具前进速度为6～8km/h,滑移率平均值为0.497%。该研究为免耕播种机的设计提供技术支持。

Structure parameters optimization and performance experiment for planetary geared anti-sliding ground wheel

In order to solve the problem of seed missed caused by high sliding of no-tillage planter,a new planetary geared anti-sliding ground wheel was designed and its configuration parameters were optimized by experiments in this paper.The quadratic orthogonal rotational regressive tests were designed in the experiments with the ground wheel’s diameter,width,vertical load,extension of anti-sliding tooth as input parameters and sliding ratio as output parameters.The regression mathematics models between output parameters and input parameters were established and then parameters were optimized through Design-expert 7.1.The optimal combination was that diameter of the wheel was 626 mm,width of the wheel was 112 mm,vertical load was 214 kg,extension of the anti-sliding tooth was 28 mm,and the sliding was 0.45%in this condition.The verification test showed that advance speed of the implement was 6-8 km/h and the average sliding was 0.497%.The research provides a basis for technical support for designing no-tillage planter.