小型轴向多点进气式饲料制粒调质器设计与试验  

Design and Experiment on Small-scale Axial Multi-point Gas Intake Conditioner for Pellet Mill

作　　者：彭飞[1] 康宏彬[1] 王红英[1] 沈祥[1] 杨洁[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业机械学报》2016年第11期121-127,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：公益性行业(农业)科研专项(201203015)

摘　　要：为实现颗粒饲料小批量生产,研究了饲料制粒机调质器工作原理和结构特点,设计了一种与小型制粒机配套的轴向多点进气式调质器。以桨叶安装角、调质轴转速、喂料转速为影响因素,调质器生产率和调质后物料温度为评价指标,按照三因素五水平正交旋转组合试验设计方法,对轴向多点进气式调质器进行了作业参数优化试验。利用Design-Expert 8.0.6软件回归分析法和响应面分析法,建立了3个因素对调质器作业评价指标的数学模型。试验结果表明,此3个因素对调质器生产率和物料温度都具有显著相关性,显著水平分别为P<0.01和P<0.001;通过响应面法对最佳参数组寻优,得到调质器最佳作业参数组合:桨叶安装角为38.1°、调质轴转速为220.6 r/min、喂料转速17.4 r/min,此方案下,调质器生产率为12.7 g/s,调质后物料温度为65.0℃,此时调质器生产率较高、物料温度在要求的加工工艺范围内。样机加工试验表明,生产率为11.8 g/s,调质后物料温度为64.0℃。Pellet mill is one of main machines in the feed processing machinery, which occupies an important position in the feed granulation processing. In order to achieve the small quantities production need of pellet feed, the working principle and structural characteristics of the conditioner were investigated, and the main parameters of key components were determined with theoretical analysis. Accordingly, the small-scale axial multi-point gas intake conditioner was designed to be compatible with the small-scale pellet mill. The blade installation angle X1 , speed of conditioner X2 , and speed of feeder X3 were selected as the influence factors, and the productivity of conditioner Y~, conditioned material temperature Y2 were selected as evaluating indicators, thus the performance optimization experiments were carried out under the quadratic orthogonal rotation design. Based on the software regression analysis Design - Expert 8.0.6 and response surface analysis method, the relationship between the two influence factors and conditioning evaluating indicator was established. The results showed that X1 , X2 and X3 were significantly correlated with YI and II2 （ P 〈 0.01 and P 〈 0. 001, respectively）. By using response surface method, the optimal aggregative index could be obtained under the condition that the blade installation angle was 38.1°, speed of conditioner spindle was 220.6 r/min, and speed of feeder was 17.4 r/min. Under this scheme, the productivity of conditioner was 12.7 g/s and the material temperature after conditioning was 65.0℃. In this case, the conditioner had the proper productivity and the conditioned material temperature was within the scope of the technical requirements. Therefore, this conditioner has good practicability in the process of conditioning small quantities of feed raw materials; the research provides references for the design of small-scale conditioner and the parameters optimization of processing technology.

关 键 词：小型饲料制粒机 调质器 轴向多点进气式 设计 试验 

分 类 号：S220.1[农业科学—农业机械化工程] TH6[农业科学—农业工程]