家用豆浆机制浆流场分析及腔内结构优化

发布时间：2018-02-24 10:33

本文关键词： 家用豆浆机制浆性能湍流场功能结构数值模拟　出处：《济南大学》2014年硕士论文　论文类型：学位论文

【摘要】：家用豆浆机是一种能够制作出多种饮品的厨房家电，如豆浆、米糊、果汁等，其多样化的功能，迎合了不同人的需求而受到青睐。目前，家用豆浆机在厨房家电中已占有很大的比例。家用豆浆机的制浆性能与刀片形状、腔体结构、电机转速等因素有关，因此，很多技术研发者围绕这些因素对豆浆机粉碎腔内结构进行了改进，但仍然不够完善。计算机技术的不断升级更新，使得CFD方法在搅拌器流场中的研究逐渐趋于成熟，一些学者开始将搅拌器研究的理论应用到家用豆浆机流场的研究中。相对于传统的实验方法而言，数值模拟方法耗费小、周期短，而且具有很好的适用性，可为家用豆浆机制浆腔体内相关结构的参数优化提供依据。本文利用Solidworks软件建立了豆浆机的三维简化模型，基于多重参考系方法建立转动流场的控制方程，选用标准k-ε湍流模型实现方程式闭合求解，根据实际工况确立模型的初始条件，对流场进行模拟仿真，从而获得腔内流体的运动规律。针对不同刀片、凸筋结构参数设计正交实验及单因素实验，选择能够反映流场湍动特性的指标，利用FLUENT软件进行了仿真分析，得出最优结构组合方案。通过研究电机转速对流场的影响，对不同转速下流场的速度、湍动能分析发现，电机转速增大使流场中各参数也相应的增大，但考虑转速的增大对刀片的强度、耐久度、电机功率及噪声等因素的影响，需要综合考虑确定较合适的转速。选取一款塑料杯体的家用豆浆机进行了制浆实验，，比较不同刀片、凸筋结构下豆浆粒径分布情况，从而验证了数值模拟结果的可靠性，数值模拟方法可为企业技术改进提供一定的指导作用。
[Abstract]:The household soybean milk machine is a kitchen appliance that can produce many kinds of drinks, such as soy milk, rice paste, juice, etc. The household soybean milk machine already occupies the very big proportion in the kitchen appliance. The pulping performance of the domestic soybean milk machine is related to the shape of the blade, the structure of the cavity, the speed of the motor, and so on. Therefore, many technical researchers have improved the structure of the grinding cavity of the soybean milk machine around these factors. But it is still not perfect. With the upgrading and updating of computer technology, the research of CFD method in agitator flow field is becoming more and more mature. Some scholars began to apply the theory of agitator research to the study of the flow field of domestic soybean milk machine. Compared with the traditional experimental method, the numerical simulation method has the advantages of less cost, shorter period and better applicability. It can provide the basis for optimizing the parameters of the relative structure in the cavity of the soya bean milk machine. In this paper, the three-dimensional simplified model of soybean milk machine is established by using Solidworks software, and the governing equation of rotational flow field is established based on multi-reference system method. The standard k- 蔚 turbulence model is used to solve the equation closed. According to the initial conditions of the model, the flow field is simulated and the motion law of the fluid in the cavity is obtained. The orthogonal experiment and single factor experiment are designed for different blade and rib structure parameters. The index which can reflect the turbulent characteristics of the flow field is selected, and the simulation analysis is carried out by using FLUENT software. By studying the effect of motor speed on the flow field, the velocity and turbulent kinetic energy of the flow field at different speeds are analyzed. It is found that the increase of motor speed makes the parameters of the flow field increase correspondingly. However, considering the influence of the increase of rotational speed on the strength, durability, motor power and noise of the blade, it is necessary to consider synthetically the more appropriate speed. A domestic soybean milk machine with plastic cup was selected to carry out the pulping experiment. The particle size distribution of soybean milk under different blade and convex rib structure was compared, and the reliability of the numerical simulation results was verified. Numerical simulation method can provide some guidance for enterprise technology improvement.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM925.59

【参考文献】