本文選題：扭葉轉子 + 設計影響因素��； 參考：《哈爾濱工業(yè)大學》2017年碩士論文

【摘要】：航天器及空間站需要凈水系統(tǒng)進行污水凈化,而壓縮機是凈水系統(tǒng)的重要一環(huán),羅茨鼓風機可以作為凈水系統(tǒng)的壓縮機。由于空間站對產品有嚴格的重量和尺寸的限制,需要使用小型羅茨鼓風機,傳統(tǒng)大型羅茨鼓風機的設計方法無法滿足所需鼓風機的設計要求,因此需要對小型羅茨鼓風機的設計和制造方法進行研究,尤其是羅茨鼓風機中線型復雜的轉子的參數化建模、轉子設計影響因素、轉子對鼓風機性能影響以及轉子的加工等迫切需要解決的問題。本文基于嚙合原理,實現了兩種型線的扭葉轉子設計,建立了扭葉轉子空間螺旋曲面體系,進行了虛擬裝配與動態(tài)仿真,運動仿真與干涉檢驗,以確保設計的合理性,進而給出羅茨轉子的設計流程。利用CFX浸入實體法實現了羅茨鼓風機內部流場的瞬態(tài)模擬,探究了不同型線與間隙對羅茨鼓風機內部流場的影響,得到了不同間隙以及不同型線(圓弧型和改進漸開線型)對羅茨鼓風機流量脈動、氣密性等性能的影響規(guī)律,為轉子的設計提供依據。通過靜力學分析得到離心力的單獨作用對于轉子應力和變形的影響,利用Workbench進行扭葉轉子的流固耦合分析,將FLUENT流場分析結果加載至Static Structure進行分析,探究氣動壓力與熱耦合作用對轉子應力和變形的影響,得到轉子的變形規(guī)律,為羅茨鼓風機轉子間隙的設計提供參考。使用UG軟件,對改進漸開線型線扭葉轉子進行加工路徑規(guī)劃分析及加工仿真與干涉檢驗,得到了扭葉轉子的五軸聯(lián)動加工路徑,對生成的數控代碼進行專用后置處理,并通過扭葉轉子的加工實驗,驗證了刀具路徑和加工代碼的正確性。
[Abstract]:Spacecraft and space station need water purification system for sewage purification, and compressor is an important part of water purification system, Roots blower can be used as the compressor of water purification system. Since the space station has strict weight and size restrictions on the product, it is necessary to use a small Roots blower, and the traditional design method of the large Roots blower cannot meet the design requirements of the required blower. Therefore, it is necessary to study the design and manufacturing methods of the small Roots blower, especially the parametric modeling of the rotor with complex lines in the Roots blower, and the factors affecting the rotor design. The effect of rotor on the performance of blower and the processing of rotor are urgent problems to be solved. Based on the meshing principle, this paper realizes the design of two kinds of torsion blade rotor, establishes the space helical curved surface system of the torsional blade rotor, carries on the virtual assembly and dynamic simulation, the motion simulation and the interference test, in order to ensure the rationality of the design. Furthermore, the design flow of Roots rotor is given. The transient simulation of the internal flow field of the Roots blower is realized by using the CFX immersion method, and the influence of different profile and clearance on the internal flow field of the Roots blower is investigated. The effects of different clearance and different profile (circular arc and improved involute) on the flow pulsation and airtightness of the Roots blower are obtained, which provides the basis for the design of the rotor. The effect of centrifugal force on the stress and deformation of rotor is obtained by statics analysis. The fluid-solid coupling analysis of torsional blade rotor is carried out by using Workbench, and the results of FLUENT flow field analysis are loaded into Static Structure for analysis. The influence of the coupling of aerodynamic pressure and heat on the stress and deformation of the rotor is studied, and the law of the rotor deformation is obtained, which provides a reference for the design of rotor clearance of the Roots blower. By using UG software, the machining path planning analysis, machining simulation and interference testing of the improved involute rotor are carried out, and the five-axis linkage machining path of the rotor is obtained, and the generated NC code is processed specially. The correctness of tool path and machining code is verified by machining experiments of twisted blade rotor.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH444

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