Φ8通径伺服阀滑阀流场的CFD仿真与分析

发布时间：2018-02-27 00:18

本文关键词： 滑阀 CFD 稳态液动力流场温度场热变形　出处：《燕山大学》2012年硕士论文　论文类型：学位论文

【摘要】：电液伺服阀是电液伺服控制系统中最关键的元件，其性能直接影响电液伺服系统的性能。电液伺服阀具有体积小、功率放大率高、响应速度快等优点。滑阀是液压伺服系统中应用最为广泛的液压放大元件。本文以Φ8通径电液伺服阀为基础，仿真分析电液伺服阀滑阀部分。目前，随着计算机技术的应用以及数值计算技术的迅速发展，用数值计算方法来研究液压系统及液压元件内部的流场分布已经能取得很好的效果。本文针对不同工况下Φ8通径电液伺服阀滑阀全流道内的流场分布、阀芯稳态液动力大小、阀杆径向力分布、滑阀温度场分布以及阀芯和阀套热变形等几个方面，采用数值模拟与理论计算相结合的方法进行较为深入的研究与分析。首先，采用计算流体动力学(Computational Fluid Dynamics，简称CFD)仿真软件，，数值模拟不同工况下Φ8通径电液伺服阀滑阀全流道内的流场特性，通过对比分析，得到工作压力和工作温度对滑阀流场特性的影响情况。其次，数值模拟不同工况下阀芯稳态液动力的情况，并与通过理论计算方法得到的阀芯稳态液动力进行对比。第三，仿真分析滑阀阀杆上径向力的分布情况，并对滑阀阀芯液压卡紧进行定量分析。最后，采用有限元分析(Finite ElementAnalysis，简称FEA)仿真软件，数值模拟滑阀温度场分布以及阀芯和阀套的热变形情况，分析热变形后阀芯和阀套之间的配合间隙情况。
[Abstract]:The electro-hydraulic servo valve is the most important component in the electro-hydraulic servo control system, and its performance directly affects the performance of the electro-hydraulic servo system. The electro-hydraulic servo valve has the advantages of small size and high power magnification. The slide valve is the most widely used hydraulic amplifying element in the hydraulic servo system. Based on the 桅 8 diameter electro-hydraulic servo valve, this paper simulates and analyzes the slide valve part of the electro-hydraulic servo valve. At present, with the application of computer technology and the rapid development of numerical computing technology, The numerical calculation method has been used to study the flow field distribution in hydraulic system and hydraulic components. In this paper, the flow field distribution in the whole channel of 桅 8 diameter electro-hydraulic servo valve slide valve and the steady hydraulic power of the valve core have been studied under different working conditions. The radial force distribution of the stem, the temperature field distribution of the slide valve and the thermal deformation of the valve core and the valve sleeve are studied and analyzed deeply by the method of combining the numerical simulation with the theoretical calculation. Firstly, the numerical simulation software of Computational Fluid Dynamics (CFDs) is used to numerically simulate the flow field characteristics of 桅 8 diameter electro-hydraulic servo valve slide valve in the whole channel under different working conditions. The effects of working pressure and working temperature on the flow field characteristics of the slide valve are obtained. Secondly, the steady fluid dynamics of the valve core under different working conditions are numerically simulated and compared with the steady fluid dynamics of the valve core obtained by the theoretical calculation method. Third, The distribution of radial force on the valve stem is simulated, and the hydraulic clamping of the valve core is quantitatively analyzed. Finally, the finite element Analysis (FEA) simulation software is used. The temperature field distribution of the slide valve and the thermal deformation of the valve core and the valve sleeve are simulated numerically. The fit gap between the valve core and the valve sleeve after the hot deformation is analyzed.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.52

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