环缝内衬旋流器研发与磨损模拟研究

发布时间：2018-04-09 08:53

本文选题：旋流器　切入点：计算流体力学　出处：《武汉科技大学》2016年硕士论文

【摘要】：旋流器由于结构简单、安装方便、操作便捷等优点,被广泛应用于各个工业领域。从旋流器使用以来,磨损问题一直是制约旋流器应用和发展的重要问题,受到人们的极大关注。虽然在耐磨材料方面进行了大量研究,但事实表明,旋流器磨损问题仍然存在。本文针对固液分离旋流器存在的磨损问题,通过计算流体力学技术,对旋流器壁面的磨损进行数值模拟研究,同时提出一种环缝内衬固液分离耐磨旋流器,并将环缝内衬耐磨旋流器与普通旋流器磨损进行了对比分析。首先,对旋流器磨损机理以及固液两相流计算方法、磨损模型进行了探讨,利用CFD,应用ANSYS软件中的CFX,对普通φ250mm固液分离旋流器磨损进行模拟研究。结果表明:旋流器壁面磨损主要集中在入口处、圆锥体与圆柱筒体交界处及底流口处。磨损部位呈螺旋带状不均匀分布在旋流器筒体和圆锥体壁面上,旋流器壁面入口处及底流口的磨损率较其它部位大,出现磨损率峰值。然后,根据模拟结果,针对旋流器壁面磨损问题,提出一种环缝内衬固液分离耐磨旋流器,即在旋流器内部增设环缝内衬,并对其进行了磨损模拟,将模拟结果和普通旋流器模拟结果进行对比。结果表明:由于环缝内衬的存在,大幅度降低了旋流器壁面的磨损。另外,针对环缝内衬的结构形式,提出另一种螺旋缝内衬结构,并对螺旋缝内衬旋流器磨损进行了数值模拟。将两种不同内衬结构的模拟结果及普通旋流器模拟结果进行两两相互对比,结果表明,两种带内衬的旋流器磨损都比普通旋流器磨损大幅度降低;在两种不同内衬结构形式中,环缝内衬旋流器的磨损较螺旋缝内衬结构的磨损仍有所降低,即环缝内衬结构为最优内衬结构形式,为耐磨旋流器的工业设计提供了指导。
[Abstract]:Hydrocyclone is widely used in various industrial fields because of its simple structure, convenient installation and convenient operation.Since the use of hydrocyclone, wear problem has been an important problem restricting the application and development of hydrocyclone.Although a great deal of research has been done on wear resistant materials, the fact shows that the wear problem of hydrocyclone still exists.In this paper, the wear problem of solid / liquid separation hydrocyclone is studied by means of computational fluid dynamics (CFD), and a kind of annular lining solid / liquid separation wear-resistant cyclone is proposed.The wear of annular lining wear-resistant cyclone is compared with that of ordinary cyclone.Firstly, the wear mechanism of hydrocyclone, the calculation method of solid-liquid two-phase flow and the wear model are discussed. The wear of ordinary 蠁 250mm solid-liquid separation cyclone is simulated by using CFDs and CFXs in ANSYS software.The results show that the wall wear of the cyclone is mainly concentrated at the entrance, the conical and cylindrical cylinder interface and the bottom outlet.The wear zone is distributed unevenly on the wall of the cylinder and cone of the hydrocyclone. The wear rate of the wall entrance and bottom outlet of the cyclone is higher than that of the other parts, and the wear rate peak value appears.Then, according to the simulation results, aiming at the problem of wall wear of hydrocyclone, a kind of wear-resistant cyclone with annular lining is put forward, that is, the annular lining is added inside the cyclone, and the wear simulation is carried out.The simulation results are compared with those of conventional hydrocyclone.The results show that the wall wear of hydrocyclone is greatly reduced due to the existence of annular lining.In addition, according to the structure form of annular lining, another spiral seam lining structure is proposed, and the wear of spiral seam lining cyclone is numerically simulated.The simulation results of two kinds of different lining structures and the simulation results of ordinary hydrocyclone are compared. The results show that the wear of the two kinds of hydrocyclone with inner lining is much lower than that of ordinary cyclone, and in the two different lining structures,The wear of annular lining cyclone is still lower than that of spiral seam lining structure, that is, the annular lining structure is the optimal inner lining structure form, which provides guidance for the industrial design of wear-resistant cyclone.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TQ051.8

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