气吸式巴旦木壳仁风选装置试验与优化分析

Experiment and Optimization Analysis of Air Suction Type for Almonds Shell Kernel Sorting Device

【目的】研究采用气吸式原理研究设计气吸式巴旦木壳仁风选装置,并采用软件参数优化,为巴旦木壳仁风选装备研发与优化提供理论参考。【方法】运用有限元软件Fluent18.0,对风腔三维模型进行流体仿真,风腔内部形成局部湍流现象,调节风腔过渡口相对位置适当提高清选效率。运用数据分析软件Design Expert对风选试验数据分析和计算。研究各因素对损失率影响顺序为喂入量、振动频率和风机转速。【结果】最佳参数组合为:喂入量4 kg/min、风机转速2300 r/min、振动频率53 Hz,清选率为95.68%,损失率为2.85%。【结论】各因素对清选率的贡献率从大到小排序依次是:喂入量、风机转速、振动频率。该装置在验证试验中清选率指标明显上升。

【Objective】To achieve the purpose of separating the shell and kernel materials of almond after breaking the shell,this project aims to design the air suction type separation device based on the principle of air suction,and optimize the parameters by software.【Methods】Finite element software Fluent 18.0 was used to simulate the three-dimensional model of air cavity.The results showed that part turbulence would be formed in the air chamber during the working process,and cleaning efficiency could be appropriately improved by adjusting the relative position of the transition port of the air chamber.The air separation test data was analyzed and calculated by using data analysis software Design Expert,the influence order of each factor on the loss ratio was feeding amount,vibration frequency and fan speed;The contribution rate of each factor on the selection rate from large to small was feeding amount,fan speed and vibration frequency.【Results】Through the optimization function,the best parameter combination was obtained as follows:feeding amount 4 kg/min,fan speed 2,300 r/min and vibration frequency 53 Hz,the verification test results showed that the selection rate was 95.68%,and the loss ratio was 2.85%.【Conclusion】Through the simulation analysis,the structure is improved,the test data optimized and the working parameter i adjusted.The selection rate index of the sorting device is obviously increased during the verification tests and the research results can provide a theoretical reference for the research development and optimization on the almond shell and kernel sorting by air suction equipment.