小型可调间隙饲料制粒机设计与试验

发布时间：2019-06-14 09:20

【摘要】：为实现小批量颗粒饲料生产,设计一种小型可调间隙饲料制粒机,包括环模及配套部件、压辊及配套部件、传动机构等。该制粒机特征为:压辊调节部件位于制粒机外部,能够在不停机的状态下实时调节模辊间隙,保证颗粒饲料的连续生产。同时设计了与该制粒机配套的控制系统。基于弹塑性理论,采用有限元分析软件Abaqus内置的Drucker-Prager Cap本构模型对制粒机模辊挤压过程进行了数值模拟,模拟结果表明,模辊间隙的设置应与物料的摩擦因数相匹配,适当提高物料的摩擦因数能够避免物料内部滑移耗能,有利于提高颗粒饲料的产量和质量。制造样机并进行了生产试验,以某配方乳猪料为原料,进行制粒机作业性能指标的测定,结果表明:该制粒机生产的颗粒饲料成品含水率为13.53%,直径为3 mm,颗粒含粉率为3.27%,颗粒耐久度(PDI)为94.34%,颗粒硬度为176.03 N,生产率约为42 kg/h,各项指标均达到设计要求,满足小批量颗粒生产的要求。
[Abstract]:In order to realize the production of small batch pellet feed, a small adjustable clearance feed granulator was designed, including ring die and supporting parts, roller and matching parts, transmission mechanism and so on. The characteristics of the granulator are as follows: the roller regulating component is located outside the granulator, which can adjust the die roll gap in real time without stopping, so as to ensure the continuous production of pellet feed. At the same time, the control system matching with the granulator is designed. Based on elastic-plastic theory, the extrusion process of die roll of granulator is simulated by Drucker-Prager Cap model built in finite element analysis software Abaqus. The simulation results show that the setting of die roll gap should be matched with the friction coefficient of material, and properly increasing the friction coefficient of material can avoid the internal slip energy consumption of material and is beneficial to improve the output and quality of pellet feed. The prototype was manufactured and the production test was carried out. Using a formula milk pig as raw material, the performance index of the granulator was determined. the results showed that the moisture content of the finished product of the granulator was 13.53%, the powder content of 3 mm, particles was 3.27%, the durability of the particles (PDI) was 94.34%, the hardness of the particles was 176.03 N, and the productivity was about 42 kg/h,. To meet the requirements of small batch particle production.
【作者单位】：中国农业大学工学院;
【基金】：公益性行业(农业)科研专项(201203015)
【分类号】：S817.124

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