转筒与桨叶组合式日粮混合机设计与试验优化

发布时间：2018-09-13 13:18

【摘要】：根据我国推广日粮饲养技术的需要及日粮混合机自主创新研究少的现状,设计了一种由中空正十棱柱状转筒与其主轴上安装的桨叶组合而成的日粮混合机,实现日粮各组分的混合加工。为探究其混合性能,利用转筒与桨叶组合式日粮混合试验装置,以混合时间、填充率、转筒转速、桨叶回转半径为试验因素,以混合均匀度、净功耗为评价指标,采用二次回归正交旋转组合试验设计方法进行试验研究。运用Design-Expert软件建立并优化分析了试验因素与评价指标之间的回归数学模型,对优化结果进行了试验验证。结果表明:各试验因素对混合均匀度的影响由大到小依次为填充率、转筒转速、混合时间、桨叶回转半径;各试验因素对净功耗的影响由大到小依次为混合时间、转筒转速、填充率、桨叶回转半径;最佳参数组合方案为混合时间3.5 min、填充率66%、转筒转速29 r/min和桨叶回转半径236 mm,对应的混合均匀度为92.98%、净功耗为32.618 k J,比优化前分别降低了5.04%、3.31%。
[Abstract]:According to the need of popularizing the feed feeding technology in our country and the present situation of less independent innovation research on the ration mixer, a kind of ration mixer was designed, which was composed of a hollow bar-prism rotary cylinder and a blade mounted on its main shaft. The mixed processing of dietary components was realized. In order to investigate its mixing performance, the mixing time, filling rate, rotating speed, rotary radius of the blade, mixing uniformity and net power consumption were taken as the test factors, and the mixing uniformity and the net power consumption were used as the evaluation index. The design method of quadratic regression orthogonal rotation combined test was used to carry out the experimental research. The regression mathematical model between experimental factors and evaluation indexes is established and optimized by using Design-Expert software, and the results of optimization are verified by experiments. The results show that the influence of test factors on mixing uniformity is the filling ratio, rotating speed, mixing time and rotating radius of the blade, and the influence of each test factor on the net power consumption is the mixing time and the rotating speed of the rotary cylinder from the large to the small, and the influence of the test factors on the mixing uniformity is in the order of filling rate, rotating speed, mixing time, and rotating radius of the blade. The optimum parameters are as follows: the mixing time is 3.5 min, the mixing uniformity is 92.98 and the net power consumption is 32.618 KJ, which is 5.04 / 3.31, respectively, when the rotating speed of the rotary cylinder is 29 r/min and the radius of the blade is 236 mm,.
【作者单位】：东北农业大学工程学院;农业部生猪养殖设施工程重点实验室;
【基金】：国家重点研发计划项目(2016YFD0701300) 国家自然科学基金项目(51405076)
【分类号】：S817.12

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