锤片式饲料粉碎机内自由流的流场特性分析

发布时间：2018-06-08 19:04

本文选题：粉碎机 + 粉碎腔　；参考：《饲料工业》2017年21期

【摘要】：在锤片式饲料粉碎机内部,以环流层为界,可将气流分为加速流和自由流。自由流不仅对饲料颗粒产生曳力作用,影响饲料的粉碎、破围和收集,而且对粉碎机能耗大、饲料过粉碎、饲料温升高、锤片磨损严重等问题也较大的影响。为了较为准确地预报自由流的流动状况,该文采用数值模拟的方法,对其速度场、压力场和湍动能场的分布特征和变化规律进行深入分析。结论认为,气流在粉碎腔上部的大幅度降速不利于自由流的下行,会影响饲料的粉碎、破围和收集;湍动能场的存在是引起气流大幅度降速的直接原因,可适当改进结构以减小湍动能场的分布范围。该研究结论可为锤片式饲料粉碎机的结构改进和相关领域的研究起到参考作用,也可完善锤片式饲料粉碎机研究的基础理论。
[Abstract]:In the interior of the hammer feed mill, the air flow can be divided into accelerated flow and free flow with the circumfluence as the boundary. Free flow not only has a drag effect on feed particles, but also has a great effect on crushing, breaking and collecting of feed, as well as on energy consumption of pulverizer, excessive crushing of feed, raising feed temperature, serious wear of hammer, and so on. In order to predict the flow of free flow accurately, the distribution and variation of velocity field, pressure field and turbulent kinetic energy field are analyzed by numerical simulation. The conclusion is that the large deceleration of airflow in the upper part of the comminution chamber is not conducive to the descending of free flow, which will affect the crushing, circumference and collection of feed, and that the existence of turbulent kinetic energy field is the direct cause of the large deceleration of airflow. The structure can be improved to reduce the distribution of turbulent kinetic energy field. The conclusion can be used as a reference for the improvement of the structure of the hammer feed mill and the research of the related fields, and the basic theory of the research on the hammer feed mill can also be perfected.
【作者单位】：泰山学院机械与建筑工程学院;滕州市中等职业教育中心学校;
【基金】：引进人才科研启动资助项目[Y-01-2016009]
【分类号】：S817.122

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