本文關(guān)鍵詞：主泵用靜壓機械密封的流場數(shù)值分析　出處：《西華大學》2011年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 靜壓式機械密封 控制方程 數(shù)值模擬 幾何參數(shù) 操作參數(shù) 密封性能

【摘要】：隨著人類文明的進步和全球經(jīng)濟的不斷發(fā)展,人類對能源的需求也在不斷擴大,尋找到清潔、安全、高效、可靠的新能源是人類文明發(fā)展的必由之路。核能經(jīng)過半個世紀的發(fā)展,技術(shù)日趨成熟,在軍、民領(lǐng)域都得到了廣泛應(yīng)用。 本文對核電站主泵中的軸封裝置進行了研究,主要針對一級靜壓式密封中的流場進行分析。從理論分析和數(shù)值計算模擬兩個方面對密封流場進行了研究,得出了密封端面幾何參數(shù)和密封操作參數(shù)等對密封性能的影響。具體說來包含以下幾個方面: (1)靜壓式機械密封的原理介紹。簡單說明了機械密封的發(fā)展狀況和相關(guān)應(yīng)用情況,主要對靜壓式機械密封進行了介紹。著重對主泵密封中使用的收斂錐面型靜壓密封進行了詳細說明,分析了其結(jié)構(gòu)特點和成膜原理,隨后通過圖示說明了密封的動態(tài)工作原理。 (2)流體力學的研究方法介紹,建立簡化了的流動控制方程。對流動的控制方程(N—S方程)進行了說明,并引出了對其簡化的方式。通過分析平行平面間隙內(nèi)黏性流動和對雷諾方程的推導過程,進一步闡明了流動的控制方程的物理意義和簡化方式,最后將密封流場的流動簡化為平面形式,并建立了其相應(yīng)的運動控制方程。對控制方程的數(shù)值求解方法進行了說明,闡述了有限體積法的原理和計算過程,并簡單介紹了離散控制方程的求解方法。 (3)密封流場的CFD分析。分析密封結(jié)構(gòu)特點,根據(jù)工程應(yīng)用中的實際情況確定密封的各主要形狀參數(shù)和操作參數(shù),建立二維的密封數(shù)值計算模型。使用商用CFD軟件FLUENT對密封間隙內(nèi)的流場進行數(shù)值模擬分析,通過變化參數(shù)的手段研究端面結(jié)構(gòu)參數(shù)和操作參數(shù)對密封性能的影響。將計算結(jié)果匯總并以曲線的形式描繪出來,以觀察其變化規(guī)律。 (4)流場內(nèi)的熱分布規(guī)律研究。分析了密封內(nèi)的主要產(chǎn)熱、散熱因素,建立密封流場在柱坐標系下的理論運動控制方程和能量控制方程。使用FLUENT軟件對流場進行數(shù)值模擬,得出流場內(nèi)的溫度分布規(guī)律,并討論熱變形對密封的影響。 本文主要通過數(shù)值計算的方式,對主泵用靜壓式機械密封內(nèi)的流場進行模擬。分析了各種形狀參數(shù)和操作參數(shù)對密封性能的影響,為進一步的研究工作和密封的設(shè)計提供一定的參考。
[Abstract]:With the continuous progress of human civilization and the development of the global economy, the energy demand is growing, to find a clean, safe, efficient and reliable new energy is the only way which must be passed in the development of human civilization. Nuclear power after half a century of development, technology matures, in the military, civilian areas have been widely used.
This article has conducted the research to the seal device of nuclear power plant primary pump, mainly for flow field of one hydrostatic seal were analyzed. From the theoretical analysis and numerical simulation of two aspects of the research on the flow field obtained seal seal, geometric parameters and operating parameters of sealing effect on the seal performance specifically. Include the following aspects:
(1) introduced the principle of hydrostatic mechanical seal. A brief description of the development status of the mechanical seal and the related application, the hydrostatic seal is introduced. Focusing on the convergence of the cone type hydrostatic main pump is used for sealing of detail, analyzes its structure characteristics and principle of film, then by illustrating the principle of dynamic seal.
(2) introduces the research method of fluid mechanics, a simplified flow control equation. The flow control equations (N S equation) are described, and leads to the simplifying method. Through the analysis of the viscous flow between two parallel plates and the derivation of the Reynolds equation, and further clarified the physical meaning of control the flow equation and simplified way, the seal flow field is simplified as a plane form, and established the corresponding equations. The numerical method for solving the control equations are described, explained the finite volume method principle and calculation process, and introduces the method to solve the discrete equations.
(3) CFD analysis of the flow field. Analysis of the sealing structure, sealing the shape parameters and operating parameters are determined according to the actual situation of engineering application, a two-dimensional numerical model of the seal. Using the commercial CFD software FLUENT based on the numerical simulation of the seal gap flow field, by changing the parameters of the influence of surface structure means study on the parameters and operating parameters on the sealing performance. The results will be summarized and depicted in the form of curves, to observe its change.
(4) analysis of the heat distribution. The analysis is mainly produced in the heat sealing, heat dissipation factor, establish the theory motion flow field in cylindrical coordinates and energy control equations. Using the FLUENT software of flow field numerical simulation, obtains the temperature distribution in flow field, and discusses the thermal deformation of the seal the impact.
In this paper, the flow field in the hydrostatic mechanical seal of the main pump is simulated by numerical calculation. The influence of various shape parameters and operation parameters on the sealing performance is analyzed, providing a reference for further research and seal design.

【學位授予單位】：西華大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH136

【參考文獻】

相關(guān)期刊論文 前5條

1 彭旭東;劉偉;白少先;孟祥鎧;盛頌恩;;熱彈變形對核主泵用流體靜壓型機械密封性能的影響[J];機械工程學報;2010年23期

2 王曉雪;劉瑩;李京浩;黃偉峰;王玉明;;核主泵用動靜壓波度機械密封機理[J];機械工程學報;2010年24期

3 蔡龍;張麗平;;淺談壓水堆核電站主泵[J];水泵技術(shù);2007年04期

4 洪振e，

本文編號：1396401