离心泵过流部件数字化设计与内流分析

发布时间：2018-01-19 03:16

本文关键词： 离心泵数字化设计流道几何模型网格划分数值模拟　出处：《山东理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：离心泵是一种需求量最大的通用水力机械。经过半个多世纪的发展,我国在离心泵的设计、制造方面取得了许多可喜的进步。现今,我国水泵生产企业大多为中小型企业,普遍存在资金和资源不足的问题,在技术储备、装备水平以及新产品研制能力等方面还相对落后,相比国外许多著名泵企,依然存在着较大、较明显的差距。基于此现状,本文对离心泵的水力设计、过流部件造型、流道几何模型建模、多工况数值模拟分析等进行了相关研究,旨在提高泵类产品的综合性能。本文主要研究内容如下： (1)本文基于离心泵水力设计和水力模型叶片表面型值点求解方法,利用VC++编程工具,开发了离心泵水力设计模块,实现了离心泵设计参数和叶轮叶片绘型参数的快速计算；对三维造型软件UG NX7.0软件平台进行了二次开发,借助数据库技术,完成了离心泵叶轮实体造型模块的开发,达到了从叶片三维造型、叶轮前后盖板造型到叶轮实体自动建模的整套功能； (2)本文基于离心泵过流部件的水力设计方法,利用UG NX7.0对离心泵过流区域建模,得到了离心泵流道几何模型；通过对网格划分技术的解析,利用FLUENT专用前处理软件Gambit对离心泵流道几何模型进行了详细的网格划分和边界条件的设定； (3)利用FLUENT求解器对经过网格划分处理的流道几何模型进行三种工况下的数值模拟,得出了离心泵内部流动特征信息,总结了离心泵内部流动速度和压力的变化、分布情况,对三种工况下离心泵的多项工作性能做了对比。最后,将模拟结果与实验结果进行了比较。本文研究内容的完成,可以大大缩短离心泵的设计时间,减少新产品研制中样机的制造数量,在提高了离心泵设计、制造精度的同时,增强了产品的可靠性和泵类企业的市场竞争力,具有重要的现实意义。
[Abstract]:Centrifugal pump is a kind of general hydraulic machinery with the greatest demand. After more than half a century of development, China has made many gratifying progress in the design and manufacture of centrifugal pump. Water pump production enterprises in China are mostly small and medium-sized enterprises, there are generally insufficient funds and resources, in terms of technical reserves, equipment level and new product development capacity is relatively backward. Compared with many famous pump enterprises abroad, there is still a big and obvious gap. Based on this situation, the hydraulic design of centrifugal pump, the modeling of flow components, and the geometry model of flow channel are modeled in this paper. In order to improve the comprehensive performance of pump products, the main contents of this paper are as follows: In this paper, the hydraulic design module of centrifugal pump is developed by using VC programming tool, based on the hydraulic design of centrifugal pump and the method of solving the value point of blade surface. The quick calculation of centrifugal pump design parameters and impeller blade drawing parameters is realized. The 3D modeling software UG NX7.0 software platform has been developed for the second time. With the help of database technology, the solid modeling module of centrifugal pump impeller has been developed, and the 3D modeling of the blade has been achieved. The whole function of modeling from the front and back cover plate of impeller to the automatic modeling of impeller entity; In this paper, based on the hydraulic design method of the flow passing parts of the centrifugal pump, the flow zone of the centrifugal pump is modeled by UG NX7.0, and the geometry model of the flow channel of the centrifugal pump is obtained. Based on the analysis of the mesh generation technology, the geometry model of centrifugal pump runner is divided and the boundary conditions are set by using the special pre-processing software Gambit of FLUENT. FLUENT solver is used to simulate the geometry model of flow channel in three working conditions, and the flow characteristic information of centrifugal pump is obtained. The variation and distribution of flow velocity and pressure in centrifugal pump are summarized. The performances of centrifugal pump under three working conditions are compared. Finally, the simulation results are compared with the experimental results. The completion of the research in this paper can greatly shorten the design time of centrifugal pump, reduce the number of prototype in the development of new products, improve the design and manufacturing accuracy of centrifugal pump at the same time. Enhance the reliability of products and pump enterprises market competitiveness, has important practical significance.
【学位授予单位】：山东理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311

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