叶板式饲料混合机混合机理分析与参数优化  

Mechanism Analysis and Parameter Optimization of Blade-type Feed Mixer

作　　者：王德福[1,2] 李超 李利桥[1,2] 李百秋 王国富[1,2] 林熠 

机构地区：[1]东北农业大学工程学院,哈尔滨150030 [2]农业部生猪养殖设施工程重点实验室,哈尔滨150030

出　　处：《农业机械学报》2017年第12期98-104,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2016YFD0701300);国家自然科学基金项目(51405076)

摘　　要：针对我国饲料混合机的发展需要及其混合机理的研究现状,对叶板式饲料混合机进行了机理分析与参数优化。通过理论分析和高速摄像研究,按物料运动特征将混合室内物料分布区域划分为蠕动区、滑动区、抛落区,其中蠕动区以剪切混合为主,滑动区以较强的剪切混合为主,抛落区以较强的剪切混合与扩散混合为主、伴随较弱的对流混合,且各个区域的位置、大小、形状受结构和运行参数的影响很大。在物料充满系数为65%的条件下(通过预试验确定),以影响混合过程的主要因素——叶板宽度、转子转速、混合时间作为试验因素,以变异系数作为评价指标,采用三因素五水平正交旋转组合试验方法进行试验。结果表明:各因素对变异系数的影响由大到小依次为转子转速、混合时间、叶板宽度;当试验参数组合为叶板宽度138 mm、混合时间4.7 min、转子转速32.5 r/min时,变异系数为3.11%。In order to promote technology progress and innovative development of feed mixers and sustainable development of feed industry in China, carrying out mixing mechanism and innovative research of feed mixers is of great significance. In view of less research of mixing mechanism of feed mixers in China,the mechanism analysis and parameter optimization of the developed blade-type mixer were carried out. Through theoretical analysis and high-speed photograph research,the conclusion could be obtained that the material distribution zone could be divided into peristalsis zone,sliding zone and throwing zone according to the material movement in the blade-type mixer. And peristalsis zone was dominated by shear mixing,sliding zone was dominated by strong shear mixing,throwing zone was dominated by strong shear mixing and diffusion mixing along with weak convective mixing. And the position,size,shape of each zone were highly affected by the structure and operation parameters of the blade-type mixer. Under the condition of loading coefficient of 65%, which was determined by preliminary experiments,blade width,rotation speed and mixing time were used as experimental factors,variation coefficient was chosen as evaluation indicator,then experiments were done based on three factors five levels orthogonal rotation combination experimental method. Results showed that the descending order of effects of various factors on variation coefficient was rotation speed,mixing time and blade width. When blade width was 138 mm,mixing time was 4. 7 min and rotation speed was 32. 5 r/min,the variation coefficient was 3. 11%. The research results of the blade-type feed mixer could provide reference for the optimum design of feed mixers.

关 键 词：饲料混合机 叶板式 混合机理 参数优化 

分 类 号：S817.12[农业科学—畜牧学]