本文選題：離心式渣漿泵 + 摩擦磨損機(jī)理��； 參考：《江西理工大學(xué)》2012年碩士論文

【摘要】：離心式渣漿泵在現(xiàn)代工業(yè)中應(yīng)用極為廣泛，，本文所指的離心式渣漿泵主要是指輸送的介質(zhì)中含有固體顆粒的固液兩相混合物的泵，由于泵所輸送的介質(zhì)中往往含有大量的酸性或堿性介質(zhì)和硬質(zhì)顆粒。泵在工作過程當(dāng)中，其具有酸堿性的介質(zhì)對(duì)泵的過流件有強(qiáng)烈的腐蝕作用，而硬質(zhì)顆粒對(duì)泵過流件又有沖刷破壞作用。而所有過流件中磨損最為嚴(yán)重的則為葉輪。 論文主要基于筆者在江西耐普集團(tuán)、江西銅業(yè)集團(tuán)德興銅礦大山選礦廠實(shí)習(xí)期間對(duì)渣漿泵在實(shí)際工作中摩擦磨損以及失效的具體情況進(jìn)行研究分析。本文首先介紹了離心式渣漿泵的工作原理以及其主要構(gòu)件的工作特點(diǎn)，然后結(jié)合渣漿泵的磨損機(jī)理，從漿體性質(zhì)、粒子粒徑、硬度、形狀與密度、固體顆粒在流道內(nèi)的運(yùn)動(dòng)軌跡、運(yùn)行工況以及葉輪材質(zhì)等方面對(duì)渣漿泵的磨損影響以及影響規(guī)律進(jìn)行了系統(tǒng)的研究分析。研究指出：當(dāng)渣漿泵輸送顆粒粒徑較小或密度較小的兩相流體時(shí)，且氣蝕發(fā)生時(shí)，葉片出口處磨損較嚴(yán)重;當(dāng)渣漿泵輸送顆粒粒徑較大或密度較大的兩相流體時(shí)，葉片進(jìn)口磨損較嚴(yán)重。而后通過分析氣蝕各階段對(duì)葉片及泵體的影響，結(jié)合近似場(chǎng)勢(shì)的方程，對(duì)離心式渣漿泵葉片設(shè)計(jì)進(jìn)行相關(guān)參數(shù)的優(yōu)化設(shè)計(jì)，并用三維軟件繪制優(yōu)化后的立體效果圖。最后以優(yōu)化后的葉片為主體，進(jìn)行有限元分析，驗(yàn)證優(yōu)化后各點(diǎn)受力情況，并得出優(yōu)化后，葉片泵磨損較傳統(tǒng)的葉片要小，應(yīng)力分布也較均勻，可有效提高泵的壽命。 最后文章對(duì)渣漿泵進(jìn)行有限元分析時(shí)，建立了葉輪的有限元模型，確定了葉輪的應(yīng)力、應(yīng)變大小和分布狀況，并分別在葉輪空轉(zhuǎn)與工作時(shí)對(duì)其進(jìn)行有限元強(qiáng)度分析，結(jié)果指出：離心式渣漿泵在工作時(shí)最大應(yīng)力出現(xiàn)在葉輪輪轂與輪體的結(jié)合部位和葉片與輪盤結(jié)合部位(即葉片根部)。為葉輪的設(shè)計(jì)提供了理論依據(jù)。
[Abstract]:The centrifugal slurry pump is widely used in modern industry. The centrifugal slurry pump in this paper mainly refers to the solid liquid two-phase mixture pump which contains solid particles in the conveying medium. Because the pump transport medium often contains a large number of acid or alkaline media and hard particles. In the working process of the pump, its acid and alkaline medium has a strong corrosion effect on the flow parts of the pump, while the hard particles have the effect of scouring and destroying the flow parts of the pump. The impeller is the most worn out of all the overflowing parts. This paper is mainly based on the research and analysis of the friction and wear and failure of slurry pump in practical work during the practice period of Dashan concentrator of Jiangxi Copper Industry Group Dexing Copper Group Group in Jiangxi Province. This paper first introduces the working principle of centrifugal slurry pump and the working characteristics of its main components, and then combines the wear mechanism of slurry pump, from the slurry properties, particle size, hardness, shape and density. The influence of solid particles on the wear and wear of slurry pump was studied and analyzed systematically in the aspects of movement track, operating condition and impeller material. It is pointed out that when slurry pump conveys two-phase fluid with smaller particle size or smaller density, and when cavitation occurs, the wear at the outlet of blade is more serious, and when slurry pump conveys two-phase fluid with larger particle size or density, Blade inlet wear is more serious. Then, by analyzing the influence of cavitation on blade and pump body, combining the equation of approximate field potential, the optimization design of relevant parameters of centrifugal slurry pump blade is carried out, and the three-dimensional effect diagram after optimization is drawn with three-dimensional software. Finally, taking the optimized blade as the main body, the finite element analysis is carried out to verify the stress at each point after the optimization, and it is concluded that the vane pump wear is smaller and the stress distribution is more uniform than that of the traditional blade after the optimization, which can effectively improve the life of the pump. Finally, the finite element model of impeller is established, and the stress, strain and distribution of impeller are determined when the slurry pump is analyzed by finite element method. The results show that the maximum stress of centrifugal slurry pump occurs in the joint part of impeller hub and wheel body and the joint position between blade and wheel disk (I. E. blade root). It provides a theoretical basis for the design of impeller.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH311

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