螺旋带式动物饲料搅拌机的结构设计与研究

发布时间：2018-06-18 07:56

本文选题：饲料搅拌机 + 混合机理　；参考：《安徽农业大学》2015年硕士论文

【摘要】：近年来,我国畜牧业得到突飞猛进的发展,饲料搅拌技术的要求也必将越来越高。根据实际养殖需求和饲料自身特性的不同,饲料搅拌设备有立式、卧式、浆式等多种结构形式。目前使用最广泛的是卧式饲料搅拌机,主要因为其生产效率高、工作可靠性强、价格便宜等特点而广受好评。本文主要以螺旋带式动物饲料搅拌机为研究对象,分析了该搅拌设备的饲料混合机理,对其关键结构参数螺旋升角、搅拌臂排列方式、搅拌轴转速等进行分析,建立了虚拟样机模型,对搅拌轴进行了静强度分析及对搅拌装置整体进行了模态分析,并对搅拌系统进行离散元数值仿真,对饲料颗粒的运动轨迹及其混合均匀度进行数值分析。1、分析搅拌设备的结构组成及混合机理,并对单位饲料颗粒进行受力分析,分别得到其在X轴跟Y轴上的分力公式,并推导出颗粒的位置方程式。2、对搅拌机主要结构的结构参数及工作参数进行研究分析,得到其关键参数的基本取值:搅拌仓体积取值为6m~3,搅龙最大直径为1867mm,底部的螺旋叶带与搅拌仓壁间隙为13mm螺旋带螺旋升角的参考取值范围为9.7°a25.2°,搅拌轴转速的最佳取值范围:20￡n￡30.95r/min。搅拌长短臂采用正排列方式,且长短搅拌臂交错排列,相位角选用90°。3、利用Pro/E软件建立螺旋带式TMR饲料搅拌机的虚拟样机,通过有限元分析法对搅拌轴进行了静强度分析,对整个螺旋带式搅拌装置整体进行了模态分析。4、利用EDEM软件对饲料搅拌机搅拌系统进行数值仿真,对饲料的运动轨迹进行了分析,得到搅拌颗粒运动矢量图,并出现了搅拌低效区;通过混合变异系数方法对饲料搅拌均匀度进行了分析,得到了当前参数条件下的最佳搅拌时长为60s。
[Abstract]:In recent years, with the rapid development of animal husbandry in China, the requirement of feed mixing technology will be higher and higher. According to the actual demand of breeding and the characteristics of feed itself, there are many structural forms of feed mixing equipment, such as vertical, horizontal, pulping and so on. At present, the most widely used is horizontal feed mixer, which is widely praised for its high production efficiency, high working reliability, low price and so on. This paper mainly takes the spiral belt animal feed mixer as the research object, analyzes the feed mixing mechanism of the mixer, analyzes the key structural parameters of the mixer, such as the helical angle, the arrangement of the mixing arm, the rotating speed of the mixing shaft, etc. The virtual prototype model is established, the static strength analysis of the mixing shaft and the modal analysis of the whole mixing device are carried out, and the discrete element numerical simulation of the mixing system is carried out. The movement track and mixing uniformity of feed particles are numerically analyzed. 1. The structure composition and mixing mechanism of mixing equipment are analyzed. The force distribution formula of unit feed particles on X axis and Y axis is obtained respectively. The particle position equation. 2 is deduced, and the structural parameters and working parameters of the main structure of the mixer are studied and analyzed. The basic values of the key parameters are obtained as follows: the volume of the mixing bin is 6 mm3, the maximum diameter of the stirring dragon is 1 867 mm, the reference range of the spiral angle between the bottom spiral blade belt and the wall of the mixing bin is 9.7 掳a 25.2 掳, and the best rotational speed of the mixing shaft is obtained. Range of values: 20n30.95r / min. The long and short stirring arms are arranged in a positive arrangement mode and staggered with a phase angle of 90 掳. The virtual prototype of the screw belt TMR feed mixer is established by using Prop / E software. The static strength of the mixing shaft is analyzed by finite element analysis. The modal analysis of the whole helical belt mixing device was carried out. The numerical simulation of the mixing system of the feed mixer was carried out by using EDEM software, and the moving track of the feed was analyzed, and the vector diagram of the agitating particle motion was obtained. The mixing coefficient of variation was used to analyze the feed mixing evenness, and the optimum stirring time was 60 s under the current conditions.
【学位授予单位】：安徽农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S817.12

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