螺旋喂料装置密实段参数优化设计及耦合仿真

针对粉体物料螺旋输送过程中存在粉尘污染、输送效率较低的问题,为实现粉体物料脱气密实输送的效果,以粉体输送密实螺杆结合微负压真空仓的方式,对螺旋喂料装置的密实段进行结构设计及参数优化.建立螺旋喂料装置的三维模型,并选用遗传算法进行参数优化,结合EDEM-Fluent耦合仿真对所设计装置密实效果进行分析.结果表明,物料的平均质量流量约为0.831 kg/s,输送最大密度为889.299 kg/m3,最大密实百分比为20.51％,质量流量在0.783～0.883 kg/s的范围内波动,波动百分比在±6.26％以内,本装置具有较好的密实脱气效果,且在保证物料质量流量增加的同时,流量波动降低,喂料精度提高.

Parameter Design Optimization and Coupling Simulation of Dense Section of Screw Feeding Device

Aiming at the problems of dust pollution and low conveying efficiency in the screw conveying process of powder materials, in order to achieve the effect of degassing and dense conveying of powder materials, the method of powder conveying dense screw combined with micro negative pressure vacuum chamber was adopted, and the dense section of the screw feeding device was designed for structure with parameter optimization. By establishing a three-dimensional model of the spiral feeding device and selecting genetic algorithm for parameter optimization, combined with EDEM-Fluent coupling simulation, the compacting effect of the designed device was analyzed. The results showed that the average mass flow rate of the material was about 0.831 kg/s, the maximum conveying density was 889.299 kg/m3, the maximum density percentage was 20.51%, the mass flow rate fluctuated within the range of 0.783~0.883 kg/s, the fluctuation percentage was within ±6.26%, it had a good compacting degassing effect. While ensuring the increase in material mass flow, it reduced flow fluctuations and improved feeding accuracy.