本文選題：離心泵 + 噪聲　； 參考：《大連理工大學(xué)》2014年碩士論文

【摘要】：隨著工業(yè)水平的不斷提高,動(dòng)力機(jī)械的種類日益增多,產(chǎn)生的振動(dòng)和噪聲污染也日趨嚴(yán)重。噪聲能干擾工作或業(yè)余活動(dòng)中的語言通訊,在某些方面,噪聲能影響人的行為,它甚至能導(dǎo)致暫時(shí)性聽力損失,如果噪聲級足夠強(qiáng),還能使聽覺產(chǎn)生永久性損傷；其二,過大的振動(dòng)影響機(jī)器正常運(yùn)轉(zhuǎn),降低設(shè)備性能指標(biāo),甚至因強(qiáng)度問題引起破壞。因此振動(dòng)與噪聲控制具有重要的理論和實(shí)踐意義。 本文通過對單級單吸離心泵進(jìn)行水力設(shè)計(jì)、強(qiáng)度計(jì)算、降噪設(shè)計(jì),并對其理論設(shè)計(jì)結(jié)果進(jìn)行試驗(yàn)驗(yàn)證,主要研究內(nèi)容和結(jié)論如下。 (1)在水力模型的設(shè)計(jì)中,采用傳統(tǒng)設(shè)計(jì)方法相似換算法初步確定水力尺寸,然后通過對水力部件進(jìn)行CFD流場分析,使得整個(gè)水力流道內(nèi)流動(dòng)平穩(wěn),未出現(xiàn)明顯的旋渦,壓力等流動(dòng)參數(shù)變化平緩,水力結(jié)構(gòu)設(shè)計(jì)合理,既滿足水力性能要求,又有效減小水力噪聲,達(dá)到了預(yù)期的目標(biāo),并滿足設(shè)計(jì)的高性能要求：流量100m3/h,揚(yáng)程60m,效率75%； (2)在結(jié)構(gòu)設(shè)計(jì)中,通過常規(guī)經(jīng)驗(yàn)公式及應(yīng)力分析軟件進(jìn)行強(qiáng)度校核,其設(shè)計(jì)方向正確,方案合理可行。總體結(jié)構(gòu)緊湊,動(dòng)靜間隙、轉(zhuǎn)動(dòng)件定位方式選擇合理,在承壓件壁厚選擇上,留有一定的余量,使得泵組具有較高的安全可靠性； (3)在降噪設(shè)計(jì)中,結(jié)合水力、結(jié)構(gòu)設(shè)計(jì),并通過對離心泵噪聲源及傳遞途徑的分析,分別在泵組水力、結(jié)構(gòu)、電磁三方面采取針對性措施,來減小泵組的噪聲。 (4)將以上設(shè)計(jì)分析得出的結(jié)論,應(yīng)用到實(shí)際產(chǎn)品中進(jìn)行試驗(yàn)驗(yàn)證,試驗(yàn)結(jié)果表明：水力性能滿足要求,噪聲結(jié)果與預(yù)期的指標(biāo)相符。 研究結(jié)果為離心泵的設(shè)計(jì)、制造和實(shí)驗(yàn)測試提供了借鑒,為該類離心泵的噪聲控制提供了方法。
[Abstract]:With the continuous improvement of industrial level, the types of power machinery are increasing day by day, and the pollution caused by vibration and noise is becoming more and more serious. Noise can interfere with verbal communication at work or in amateur activities. In some ways, noise can affect human behavior. It can even lead to temporary hearing loss, and if the noise level is strong enough, it can cause permanent hearing impairment. Excessive vibration affects the normal operation of the machine, reduces the performance index of the equipment, and even causes damage due to the strength problem. Therefore, vibration and noise control has important theoretical and practical significance. In this paper, the hydraulic design, strength calculation, noise reduction design of single-stage single-suction centrifugal pump are carried out, and its theoretical design results are tested and verified. The main research contents and conclusions are as follows: (1) in the design of hydraulic model, The hydraulic dimension is preliminarily determined by the traditional design method similar conversion method, and then the CFD flow field analysis of the hydraulic components is carried out, which makes the flow in the whole hydraulic channel stable, without obvious vortex, and the change of flow parameters such as pressure is gentle. The design of hydraulic structure is reasonable, which not only meets the requirements of hydraulic performance, but also effectively reduces the hydraulic noise, achieves the expected goal, and meets the high performance requirements of the design: flow rate of 100m3 / h, lift of 60m, efficiency of 75.The (2) in the structural design, The design direction is correct and the scheme is reasonable and feasible by using the conventional empirical formula and stress analysis software. The overall structure is compact, the static and static clearance, the rotation part location mode selection is reasonable, in the pressure part wall thickness choice, has the certain allowance, causes the pump group to have the higher safety reliability; (3) in the noise reduction design, unifies the hydraulic power, Structure design, and through the analysis of the noise source and transmission way of centrifugal pump, the paper takes specific measures in hydraulic, structural and electromagnetic aspects of pump group, respectively, to reduce the noise of pump group. (4) the conclusion of the above design analysis is given. The test results show that the hydraulic performance meets the requirements and the noise results are in line with the expected targets. The results provide a reference for the design, manufacture and experimental test of centrifugal pump, and provide a method for noise control of this kind of centrifugal pump.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH311

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本文編號(hào)：2070313