粉料包装机计量螺杆的结构参数优化设计

目的在不改变螺杆转速和外径的前提下,对已有包装机的计量螺杆结构参数进行优化设计,提高计量螺杆的输送效率。方法构建螺杆的输送能力模型,并分析颗粒在计量螺杆内部的运动速度。通过电镜显微镜观测典型物料颗粒微观形貌,在离散元仿真环境中构建颗粒形貌,并模拟粉状物料的计量输送过程。通过比对不同结构参数的计量螺杆输送能力,得到初选结构参数,基于粒子群优化算法得到螺杆最佳结构参数,通过仿真模拟方法对优化后的计量螺杆输送能力进行比对验证。结果优化后的计量螺杆对粉状物料输送速度为358.79 mm/s,输送效率提高了7.44%。结论通过优化结构参数和仿真模拟结合的方法,提高了粉状物料计量螺杆的输送效率,为工业企业计量螺杆的设计和加工提供基础数据参考。

挤出机计量段螺杆的优化设计

通过有限元与正交设计相结合的方法,对单螺杆挤出机计量段内物料的流动过程进行数值模拟,通过多目标优化计算得到的结果探讨螺杆的几何参数对计量段挤出过程的单耗,熔体输送速率及螺杆所受轴向力的影响,得出最优的螺杆参数因子水平组合。用此方法对螺杆的优化设计有一定指导意义,不但可缩短产品设计周期,而且减少设计成本。

注塑机塑化系统的研究进展

简述了注塑机塑化系统塑化不均的问题,综述了近年来国内外学者对注塑机塑化系统改进和完善的研究进展,阐述了目前比较先进的注塑成型理念及技术,为后人更深入的研究提供便利。

Optimization design of drilling string by screw coal miner based on ant colony algorithm

It took that the weight minimum and drive efficiency maximal were as double optimizing target,the optimization model had built the drilling string,and the optimization solution was used of the ant colony algorithm to find in progress.Adopted a two-layer search of the continuous space ant colony algorithm with overlapping or variation global ant search operation strategy and conjugated gradient partial ant search operation strat- egy.The experiment indicates that the spiral drill weight reduces 16.77% and transports the efficiency enhance 7.05% through the optimization design,the ant colony algorithm application on the spiral drill optimized design has provided the basis for the system re- search screw coal mine machine.