基于康达效应的热缩烘箱流场分析及结构优化

目的对壁纸包装机烘箱进行建模与分析,优化烘箱结构。方法基于流体力学,建立热收缩烘箱的能量方程和运动学方程。通过数值计算得到烘箱流场分布及仿真云图,进而研究烘箱喷口、底面、回风口的流场分布及对热缩性能的影响。基于计算结果,进行回风口尺寸和结构的改进与优化,对多种拟定的改进结构进行分析计算,提取计算数据并对比确定相对最优模型。结果将确定的最优改进模型加入烘箱中进行整体模拟计算,提取优化后的计算数据,完成结构优化设计。结论优化后的壁纸包装机烘箱结构在一定程度上改进了原结构中存在的不足,能够较好地满足壁纸包装工程中的工艺需要。

Analysis and Structural Improvement of Flow Field of Heat-shrinkable Oven

The work aims to build a model of the oven of wall-paper packaging machine and analyze it, so as to optimize its structure. Based on the fluid mechanics, the energy equation and kinematics equation of the heat-shrinkable oven were established. Through numerical calculation, the oven flow field distribution and simulation cloud chart were obtained. And then the flow field distribution of oven nozzle, bottom surface and return air inlet as well as its effects on heat shrinkage were researched. According to calculation results, the size and structure of return air inlet were improved and optimized, a variety of proposed improved structures were analyzed and calculated, and the relatively optimal model was determined by extracting and comparing the calculation results. Finally, the optimal improved model was applied to the oven for integral simulation and calculation. The optimized calculation data were extracted to complete the optimal structural design. In conclusion, the oven structure of the improved wall-paper packaging machine to some extent has improved the deficiencies in the original structure, which can better meet the process requirements in wall-paper packaging engineering.