间隙密封的性能研究

发布时间：2018-05-01 07:34

本文选题：间隙密封 + 有限体积法　；参考：《东北石油大学》2012年硕士论文

【摘要】：为了适应工业技术发展要求的不断提高和环境保护要求的日益严苛，生产设备的工作环境对间隙密封的性能提出了更高的要求。而间隙密封由于其所具有的特点在使用中仍占有较高比率。所以对间隙密封的的进行研究是十分必要的。间隙密封是利用流体通过微小间隙时产生流动阻力而达到密封效果的，属于非接触密封。与其他形式的密封相比，可大大降低密封面磨损，提高密封的可靠性，延长密封寿命，，已广泛应用于液体火箭发动机的氢涡轮泵上，高、中压离心压缩机，汽轮机或离心机等机械设备上。在阅读了大量国内外文献资料的基础上，本文着重以计算流体动力学CFD的角度从整个未简化的流体力学控制方程出发，基于有限体积法，采用FLUENT软件对间隙密封的流场进行模拟计算，解决了微尺度和宏观尺度相结合而导致的网格划分的难点；应用RNG k-ε湍流模型、SIMPLEC算法，计算了流场内部的压力分布、流体速度分布和泄漏量等特性参数；同时比较了轴套式间隙密封、锥形间隙密封和矩形间隙密封三者的流场，确定了不同形式间隙密封的密封性能。
[Abstract]:In order to meet the requirements of the development of industrial technology and the increasingly stringent requirements of environmental protection, the working environment of production equipment put forward higher requirements for the performance of clearance seals. The clearance seal still occupies a high ratio in use because of its characteristics. So it is necessary to study the clearance seal. The clearance seal is a non-contact seal which uses the flow resistance when the fluid passes through the micro gap to achieve the sealing effect. Compared with other forms of seal, it can greatly reduce the wear of sealing surface, improve the reliability of seal and prolong the life of seal. It has been widely used in hydrogen turbine pump of liquid rocket engine, high and medium pressure centrifugal compressor, On machinery such as steam turbines or centrifuges. On the basis of reading a great deal of literature at home and abroad, this paper focuses on the whole unsimplified fluid dynamics control equation from the point of view of computational fluid dynamics (CFD), based on the finite volume method. The flow field of clearance seal is simulated by FLUENT software, which solves the difficulty of meshing caused by the combination of micro scale and macro scale, and the pressure distribution inside the flow field is calculated by using RNG k- 蔚 turbulence model and simple algorithm. At the same time, the flow field of the shaft sleeve clearance seal, the cone clearance seal and the rectangular clearance seal are compared, and the sealing performance of different clearance seals is determined.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH136

【引证文献】