垂直升降式单体仿形棉花打顶机

Vertical Lift Type Single Profiling Cotton Topping Machine

针对棉花打顶的农艺要求及现有打顶机存在仿形效果不理想等问题,设计了一种垂直升降式单体仿形棉花打顶机并论述了其结构和工作原理。采用中心组合优化试验法对影响该机仿形效果与打顶质量的因素进行优化试验研究,建立了相关系数与行走速度、仿形板与切割器距离、液压泵流量间的二次回归模型。对模型响应曲面分析寻优,得到最佳结构及作业参数。结果表明:当行走速度为0.86 m/s、仿形板与切割器距离为0.543 m、液压泵流量为4.69 L/min时,相关系数为0.961,仿形效果与打顶质量最佳。经田间试验证明该优化方案可行,为垂直升降式单体仿形棉花打顶机设计提供理论依据。

For agronomic requirements for cotton topping and unsatisfactory profiling effect of the existing machine,a kind of vertical lift type single profiling cotton topping machine was designed.Its structure and working principle were proposed.Central composite test was used on the factors which had effect on profiling effect and quality of topping of the proposed machine.The quadratic regression model of correlation coefficient and walking speed,profile plate and cutting distance,and pump flows were built respectively.The optimal structural and operated parameters were obtained by analyzing the response surface of model.The results showed that,when the travel speed was 0.86 m/s,distance profile plate with cutter was 0.543 m,and the pump flow 4.69 L/min,the best profiling effect and topping quality could be achieved with a correlation coefficient of 0.961.The field test showed that the optimized program was feasible,which provided theoretical basis for design of vertical lift type single profiling cotton topping machine.