本文關鍵詞：棱桿式壓縮機機組系統(tǒng)設計與試驗研究　出處：《哈爾濱工業(yè)大學》2012年碩士論文　論文類型：學位論文

  更多相關文章： 棱桿式壓縮機 機組系統(tǒng) Fluent動網格技術 性能分析 試驗研究

【摘要】：壓縮機作為重要的基礎技術裝備，它被廣泛應用在汽車、化工等多種領域。目前市場上應用比較廣泛的螺桿壓縮機存在轉子加工費用高、低轉速時工作效率低的缺點。棱桿式壓縮機是一種新型的壓縮機，工作原理與螺桿式壓縮機類似，其獨特的轉子型線使其具有比螺桿壓縮機轉子加工成本低、運行轉速低、工作效率高的優(yōu)勢。 本文對棱桿式壓縮機樣機的各個部件進行了設計。推導了容積流量、容積效率、軸功率、絕熱效率以及噴油量的計算公式，并計算出壓縮機在不同轉速運轉時的實際軸功率與噴油容積流量。分析了棱桿式壓縮機機組系統(tǒng)的工作過程，并設計了壓縮機機組系統(tǒng)。 基于CFD仿真軟件Fluent，，本文建立了棱桿式壓縮機的二維幾何模型，選取合適的計算模型和求解方法，對棱桿式壓縮機的工作過程進行模擬，得到了不同瞬時的流場分布情況。建立不同的棱桿式壓縮機模型，分析轉子中心距和齒頂間隙對排氣口壓力的影響。針對同一個棱桿式壓縮機模型，分析轉速對排氣壓力的影響。仿真結果表明，轉子中心距和齒頂間隙越大，排氣壓力就越低；對同一個壓縮機模型，轉速越高，排氣壓力就越高。 在完成了對所設計的棱桿式壓縮機的機加工和安裝調試后，進行了磨合試驗和壓縮機機組系統(tǒng)的試驗，測量了以兩種不同轉速運行時的排氣壓力。試驗結果表明，棱桿式壓縮機在2189r/min的較低轉速時即可達到0.7MPa的常用排氣壓力，由此證明棱桿式壓縮機能夠滿足實際工程應用的需要。將磨合試驗結果與機組系統(tǒng)試驗結果作對比分析，可知噴油方式對排氣壓力有影響。將機組系統(tǒng)試驗結果與仿真結果作對比分析，可知試驗數(shù)據與仿真結果基本吻合，驗證了用Fluent軟件仿真來分析流場、預測試驗結果的可行性。
[Abstract]:Compressor as an important basic technology equipment, it is widely used in automotive, chemical and other fields. At present, screw compressor is widely used in the market there is a high cost of rotor processing. The edge compressor is a new type of compressor, its working principle is similar to that of screw compressor, its unique rotor profile makes it have lower machining cost than screw compressor rotor. Low running speed and high working efficiency. In this paper, the various components of the prototype of the prismatic compressor are designed, and the calculation formulas of volumetric flow rate, volumetric efficiency, shaft power, adiabatic efficiency and fuel injection amount are derived. The actual shaft power and the volume flow of oil injection are calculated when the compressor is running at different speeds. The working process of the compressor unit system is analyzed and the compressor unit system is designed. Based on the CFD simulation software Fluent. this paper establishes the two-dimensional geometric model of the prismatic compressor and selects the appropriate calculation model and solution method to simulate the working process of the prismatic compressor. Different instantaneous flow field distribution is obtained. Different edge compressor models are established, and the effects of rotor center distance and tooth top clearance on outlet pressure are analyzed. The simulation results show that the greater the rotor center distance and the tooth top clearance, the lower the exhaust pressure. For the same compressor model, the higher the speed, the higher the exhaust pressure. After finishing the machining and installation of the designed prismatic compressor, the running-in test and the compressor unit system test are carried out. The exhaust pressure at two different speeds is measured. The test results show that the discharge pressure of the prismatic compressor can reach 0.7 MPA at the lower speed of 2189r / min. It is proved that the prismatic compressor can meet the needs of practical engineering application. The result of running-in test is compared with the result of unit system test. It is known that the fuel injection mode has an effect on the exhaust pressure. By comparing the test results with the simulation results, we can see that the experimental data are in good agreement with the simulation results. The feasibility of using Fluent software to analyze the flow field and predict the test results is verified.
【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】：2012
【分類號】：TH45

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