【摘要】：對(duì)于大軸徑機(jī)械密封裝置,機(jī)械密封的重要零部件動(dòng)、靜環(huán)端面在高壓、高速和高溫載荷條件下嚴(yán)重影響密封裝置的密封性能。本文基于ANSYS軟件,結(jié)合國(guó)內(nèi)外在機(jī)械密封性能理論上的新的研究成果,從結(jié)構(gòu)靜態(tài)和流體穩(wěn)態(tài)兩個(gè)角度建立了計(jì)算機(jī)械密封性能的有限元模型,并對(duì)密封環(huán)的軸向變形、應(yīng)力,流體的速度場(chǎng)和壓力場(chǎng)做了分析研究。 首先本文對(duì)結(jié)構(gòu)靜態(tài)分析中,以變形為切入點(diǎn),分析了單獨(dú)分析方法的不足,將機(jī)械密封模型簡(jiǎn)化成軸對(duì)稱,利用整體接觸方法,保證了受力與變形的協(xié)調(diào)。分析結(jié)果表明,機(jī)械密封端面在介質(zhì)壓力,彈簧力作用下密封端面出現(xiàn)楔形變形,然而增加了扭矩的整體接觸分析表明了,動(dòng)靜環(huán)的的外徑出的接觸力較大。總的可以看出整體接觸分析的有效地說(shuō)明了接觸端面中肯定會(huì)出現(xiàn)收斂和發(fā)散的楔形變形。 減少泄漏量是機(jī)械密封的最重要的目的之一,因此計(jì)算研究機(jī)械密封端面間隙之間的流體性能是具有現(xiàn)實(shí)意義的。本文主要基于CFX11.0流體分析軟件建立間隙流體的有限元模型,給出密封間隙流體的相關(guān)邊界條件,得到了壓力,速度和網(wǎng)格位移,說(shuō)明機(jī)械密封端面之間的流場(chǎng)流動(dòng)特性。為防泄漏問(wèn)題提供了理論依據(jù),為保證機(jī)械密封一更長(zhǎng)工作壽命長(zhǎng)期有效地運(yùn)行方面,具有現(xiàn)實(shí)意義。
[Abstract]:For the large diameter mechanical sealing device, the sealing performance of the sealing device is seriously affected by the moving and static ring end face under the condition of high pressure, high speed and high temperature load. In this paper, based on ANSYS software, combined with the new research results of mechanical seal performance theory at home and abroad, a finite element model for calculating mechanical seal performance is established from two angles of structural static state and fluid steady state, and the axial deformation and stress of seal ring are analyzed. The velocity field and pressure field of the fluid are studied. Firstly, in the static analysis of the structure, taking deformation as the breakthrough point, the deficiency of the single analysis method is analyzed. The mechanical seal model is simplified into axisymmetric and the overall contact method is used to ensure the coordination between the force and the deformation. The results show that the end face of mechanical seal appears wedge deformation under the action of medium pressure and spring force. However, the overall contact analysis with increased torque shows that the contact force of the outer diameter of the static and static ring is larger. It can be seen that the integral contact analysis can effectively explain the convergence and divergence of wedge-shaped deformation in the contact face. Reducing leakage is one of the most important purposes of mechanical seal, so it is of practical significance to calculate and study the fluid performance between the end clearance of mechanical seal. In this paper, the finite element model of clearance fluid is established based on CFX11.0 fluid analysis software, and the relevant boundary conditions of seal clearance fluid are given. The pressure, velocity and grid displacement are obtained, and the flow field characteristics between the end surfaces of mechanical seal are explained. It provides a theoretical basis for the problem of preventing leakage and has practical significance in ensuring the long working life of mechanical seal and running effectively for a long time.
【學(xué)位授予單位】：新疆大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH136

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