本文選題：洗車機 + 建模��； 參考：《安徽工程大學》2017年碩士論文

【摘要】：洗車機由噴水刷噴水,可以快速的清潔車身上面的污漬。它具有便利快捷、性價比高等優(yōu)點。但是沖刷過后車子必須用柔軟的擦布或清潔的海綿進行仔細擦拭,想要把車清洗干凈不僅麻煩而且浪費時間和體力,嚴重阻礙洗車機的使用市場。本文的家用便攜式洗車機將毛巾清潔與噴頭噴水結合在一起,將私家車的清洗變得更加省時省力。本文對洗車機旋轉噴頭內(nèi)部流場采用基于CFD的流場分析方法進行數(shù)值模擬并優(yōu)化,以提高洗車機的整體性能。論文對洗車機整體進行結構設計,進行了潛水泵供電電源的計算、潛水泵控制系統(tǒng)、桶體結構和旋轉噴頭結構的設計,設計二維結構圖并進行洗車機旋轉噴頭部分的三維建模;通過軟件建立旋轉噴頭三維模型的流體域并將求解出的流體域模型劃分有限元網(wǎng)格,以計算流體動力學為基礎,運用Fluent軟件對洗車機旋轉噴頭的內(nèi)部流場進行流體動力學仿真模擬與分析,并選取旋轉噴頭的關鍵截面的壓力云圖、速度云圖以及速度矢量圖進行分析;選定出水口直徑、進口壓力、分水管管徑和出水口數(shù)目作為影響指標的關鍵結構因素,選定出水速度和旋轉速度為性能評價指標設計正交實驗,建立正交試驗表并對每個因素水平的綜合得分進行計算,之后進一步地通過極差分析法得出各個參數(shù)對旋轉噴頭性能指標的影響大小和每個因素水平的質量評價指標最高的結構參數(shù),將此正交試驗優(yōu)化后的旋轉噴頭在Fluent軟件中仿真分析,最后將得到的壓力云圖及速度矢量圖與原旋轉噴頭結果進行對比得出其合理性;對旋轉噴頭進一步優(yōu)化,完全采用數(shù)值計算方法計算旋轉噴頭工作時的壓力損失并推導出出水量的公式,并進一步地對優(yōu)化旋轉噴頭結構進行優(yōu)化;最后將最優(yōu)化的洗車機旋轉噴頭結構及洗車機其他部分進行了實物制造與試驗,制造洗車機零件,并組裝出樣機,經(jīng)過洗車試驗符合要求。
[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.
【學位授予單位】：安徽工程大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH122

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