本文關(guān)鍵詞：泥沙泵葉輪的包覆抗磨研究　出處：《太原理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 泥沙泵 葉輪 抗磨 模具設(shè)計(jì) Moldflow

【摘要】：采砂船上的泥沙泵和清淤用的渣漿泵由于工況惡劣,泵的過流部件磨損非常嚴(yán)重,其核心部件葉輪的磨損最為突出。正常工作情況下,采砂船上的葉輪的使用壽命不足一周,需要頻繁更換,既影響工作效率,又顯著增加使用成本。本文針對(duì)葉輪的磨損問題研究減緩磨損的新方法。 在廣泛查閱研究國內(nèi)外有關(guān)文獻(xiàn)的基礎(chǔ)上,提出在葉輪表面包覆一層耐磨材料來抗磨的方法。經(jīng)論證確定包覆層材料用聚氨酯彈性體,采用注塑工藝成型在葉輪表面。為了保持葉輪與泵殼體的尺寸關(guān)系,同時(shí)需要保證包覆層在葉輪上能夠牢固定位,包覆前應(yīng)對(duì)葉輪結(jié)構(gòu)進(jìn)行預(yù)處理,處理后的結(jié)果需要滿足葉輪的強(qiáng)度要求。利用三維參數(shù)化設(shè)計(jì)軟件UG建立了葉輪預(yù)處理后的3D模型,在此基礎(chǔ)上,應(yīng)用“反向抽殼”功能建立了包覆層的3D模型,為成型模具的計(jì)算機(jī)輔助設(shè)計(jì)奠定了基礎(chǔ)。 包覆層的成型模具設(shè)計(jì)實(shí)屬帶金屬嵌件的塑料成型模具的設(shè)計(jì),需要考慮的因素較多,如嵌件(葉輪)在模內(nèi)的定位,材料的流動(dòng)性、收縮率等。應(yīng)用模流分析軟件Moldflow進(jìn)行了注塑模擬分析,優(yōu)化了澆口位置和成型工藝參數(shù),然后應(yīng)用UG中的注塑模向?qū)old wizard研發(fā)了葉輪包覆層的成型模具,并進(jìn)行了計(jì)算機(jī)模擬成型。
[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.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH38

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