泥沙泵叶轮的包覆抗磨研究

发布时间：2018-01-15 01:05

本文关键词：泥沙泵叶轮的包覆抗磨研究　出处：《太原理工大学》2012年硕士论文　论文类型：学位论文

更多相关文章： 泥沙泵 叶轮抗磨 模具设计 Moldflow

【摘要】：采砂船上的泥沙泵和清淤用的渣浆泵由于工况恶劣,泵的过流部件磨损非常严重,其核心部件叶轮的磨损最为突出。正常工作情况下,采砂船上的叶轮的使用寿命不足一周,需要频繁更换,既影响工作效率,又显著增加使用成本。本文针对叶轮的磨损问题研究减缓磨损的新方法。在广泛查阅研究国内外有关文献的基础上,提出在叶轮表面包覆一层耐磨材料来抗磨的方法。经论证确定包覆层材料用聚氨酯弹性体,采用注塑工艺成型在叶轮表面。为了保持叶轮与泵壳体的尺寸关系,同时需要保证包覆层在叶轮上能够牢固定位,包覆前应对叶轮结构进行预处理,处理后的结果需要满足叶轮的强度要求。利用三维参数化设计软件UG建立了叶轮预处理后的3D模型,在此基础上,应用“反向抽壳”功能建立了包覆层的3D模型,为成型模具的计算机辅助设计奠定了基础。包覆层的成型模具设计实属带金属嵌件的塑料成型模具的设计,需要考虑的因素较多,如嵌件(叶轮)在模内的定位,材料的流动性、收缩率等。应用模流分析软件Moldflow进行了注塑模拟分析,优化了浇口位置和成型工艺参数,然后应用UG中的注塑模向导Mold wizard研发了叶轮包覆层的成型模具,并进行了计算机模拟成型。
[Abstract]:Because of the bad working conditions, the wear of the flow passing parts is very serious, and the wear of the impeller, the core part of the pump, is the most prominent. Under the normal working condition, the sand pump on the sand mining ship and the slurry pump on the silt cleaning are very serious. The service life of impeller on sand mining ship is less than one week, which needs to be replaced frequently, which not only affects the working efficiency, but also increases the use cost significantly. In this paper, a new method to reduce the wear of impeller is studied according to the wear problem of impeller. On the basis of extensive reference to relevant literatures at home and abroad, the method of coating a layer of wear-resistant material on the surface of impeller to resist wear was put forward, and the polyurethane elastomer for coating material was determined by demonstration. In order to keep the size relationship between impeller and pump shell, it is necessary to ensure that the coating layer can be firmly positioned on the impeller, and the impeller structure should be pretreated before coating. The results after processing need to meet the strength requirements of impeller. The 3D model of impeller preprocessing is established by using 3D parameterized design software UG. The 3D model of the coating layer is established by using the function of "reverse shell pulling", which lays a foundation for the CAD of forming die. The design of forming die for coating layer is actually the design of plastic forming mould with metal insert. There are many factors to be considered, such as the positioning of the insert (impeller) in the mold and the fluidity of the material. Shrinkage, etc. The injection molding simulation analysis was carried out by using the mold flow analysis software Moldflow, and the gate position and molding process parameters were optimized. Then, the molding mould of impeller cladding layer is developed by Mold wizard, which is used in UG, and the computer simulation molding is carried out.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH38

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