便携式家用洗车器结构设计及流场分析研究

发布时间：2018-06-10 15:35

本文选题：洗车机 + 建模　；参考：《安徽工程大学》2017年硕士论文

【摘要】：洗车机由喷水刷喷水,可以快速的清洁车身上面的污渍。它具有便利快捷、性价比高等优点。但是冲刷过后车子必须用柔软的擦布或清洁的海绵进行仔细擦拭,想要把车清洗干净不仅麻烦而且浪费时间和体力,严重阻碍洗车机的使用市场。本文的家用便携式洗车机将毛巾清洁与喷头喷水结合在一起,将私家车的清洗变得更加省时省力。本文对洗车机旋转喷头内部流场采用基于CFD的流场分析方法进行数值模拟并优化,以提高洗车机的整体性能。论文对洗车机整体进行结构设计,进行了潜水泵供电电源的计算、潜水泵控制系统、桶体结构和旋转喷头结构的设计,设计二维结构图并进行洗车机旋转喷头部分的三维建模;通过软件建立旋转喷头三维模型的流体域并将求解出的流体域模型划分有限元网格,以计算流体动力学为基础,运用Fluent软件对洗车机旋转喷头的内部流场进行流体动力学仿真模拟与分析,并选取旋转喷头的关键截面的压力云图、速度云图以及速度矢量图进行分析;选定出水口直径、进口压力、分水管管径和出水口数目作为影响指标的关键结构因素,选定出水速度和旋转速度为性能评价指标设计正交实验,建立正交试验表并对每个因素水平的综合得分进行计算,之后进一步地通过极差分析法得出各个参数对旋转喷头性能指标的影响大小和每个因素水平的质量评价指标最高的结构参数,将此正交试验优化后的旋转喷头在Fluent软件中仿真分析,最后将得到的压力云图及速度矢量图与原旋转喷头结果进行对比得出其合理性;对旋转喷头进一步优化,完全采用数值计算方法计算旋转喷头工作时的压力损失并推导出出水量的公式,并进一步地对优化旋转喷头结构进行优化;最后将最优化的洗车机旋转喷头结构及洗车机其他部分进行了实物制造与试验,制造洗车机零件,并组装出样机,经过洗车试验符合要求。
[Abstract]:The car washer is sprayed with water spray, which can quickly clean up the stains on the body. It has the advantages of convenience and speed, high cost-performance ratio and so on. But after scouring, the car must be carefully wiped with a soft cloth or a clean sponge. Trying to clean the car is not only troublesome but also a waste of time and energy, seriously hampering the market for the use of car washing machines. The portable car washing machine combines towel cleaning with sprinkler water, which makes the cleaning of private cars more time-saving and labor-saving. In this paper, the flow field inside the rotary nozzle of the car washing machine is simulated and optimized by CFD based flow field analysis method, in order to improve the overall performance of the car washing machine. The whole structure of the car washing machine is designed, the power supply of the submersible pump is calculated, the control system of the submersible pump, the structure of the barrel and the rotating nozzle is designed, the two-dimensional structure diagram is designed and the 3D modeling of the rotating sprinkler part of the car washing machine is carried out. The fluid domain of the 3D model of rotary nozzle is established by software, and the fluid domain model is divided into finite element meshes, which is based on computational fluid dynamics (CFD). The fluid dynamics simulation and analysis of the internal flow field of the rotating nozzle of the car washing machine are carried out by using fluent software, and the pressure cloud diagram, velocity cloud diagram and velocity vector diagram of the key section of the rotating nozzle are selected for analysis, and the diameter of the outlet is selected. The inlet pressure, pipe diameter and the number of outlet are the key structural factors, and the outlet speed and rotation speed are selected as the performance evaluation indexes to design the orthogonal experiment. Establish the orthogonal test table and calculate the comprehensive score of each factor level. Then through the range analysis method, the influence of each parameter on the performance index of rotary nozzle and the structure parameter with the highest quality evaluation index of each factor level are obtained. The optimized rotary nozzle is simulated and analyzed in fluent software. Finally, the pressure cloud diagram and velocity vector diagram are compared with the original rotating nozzle results to obtain its rationality. The pressure loss of rotating nozzle is calculated by numerical calculation method and the formula of water output is deduced and the structure of rotary nozzle is further optimized. In the end, the optimized structure of the rotary sprinkler and other parts of the car washing machine are manufactured and tested, the parts of the car washing machine are manufactured, and the prototype is assembled, which meets the requirements after the car washing test.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH122

【参考文献】