本文選題：沖壓泵 + 鑄造泵��； 參考：《浙江工業(yè)大學(xué)》2011年碩士論文

【摘要】：沖壓焊接離心泵流道表面光滑、清潔環(huán)保、制造過程省時省材、水力性能優(yōu)于鑄造泵而且使用壽命長,維修替換方便等等優(yōu)點繁多,已經(jīng)成為未來泵發(fā)展的主方向。沖壓泵的效率技術(shù)指標(biāo)往往高于國家標(biāo)準(zhǔn)而鑄造泵的效率技術(shù)指標(biāo)往往低于國家標(biāo)準(zhǔn),為此,本文選取DQ100-64-22型沖壓泵為研究對象,利用CFD數(shù)值模擬的方法開展了沖壓泵與鑄造泵效率技術(shù)指標(biāo)的相關(guān)對比研究,同時對于部分結(jié)構(gòu)的方案與揚(yáng)程效率之間的關(guān)系,進(jìn)行了理論分析與試驗研究。本文的主要工作和成果如下： 1.通過查閱大量的資料,詳細(xì)介紹了國內(nèi)外在沖壓泵設(shè)計理論、設(shè)計方法上的研究成果；比較了沖壓泵和鑄造泵的設(shè)計方法及制造工藝；并對沖壓泵與鑄造泵進(jìn)行結(jié)構(gòu)對比,分析得在葉型、葉片厚度、口環(huán)間隙和葉輪粗糙度等結(jié)構(gòu)存在較大差異。 2.應(yīng)用Pro/E軟件建立DQ100-64-22型多級沖壓泵單級水力模型,利用Gambit畫流體域網(wǎng)格,定義邊界條件,然后倒入到Fluent模擬計算,分析內(nèi)流場的靜壓、速度、總壓等參數(shù),再用后處理方法通過計算得到揚(yáng)程效率等外特性參數(shù)。 3.對直葉片、倒角邊葉片、空間葉片傾斜等三種葉型模擬分析內(nèi)流場和揚(yáng)程效率。得到,葉片倒角和傾斜對于泵的影響較小；直葉片對內(nèi)流場和水力性能影響較大,但在小流量時影響很小。說明直葉片葉型適用于低比轉(zhuǎn)速；沖壓泵與鑄造泵受葉型影響較小。 4.研究不同葉片厚度d模型的模擬結(jié)果。得到,在d=2mm時內(nèi)流場流態(tài)和性能變化微�。辉阼T造泵范圍d=3mm時,內(nèi)流場和性能受影響較大。比較沖壓泵葉片厚度d=1mm與鑄造泵葉片厚度d-3mm,揚(yáng)程效率提高百分比分別為2.85%、3.34%。 5.分析口環(huán)間隙與揚(yáng)程效率關(guān)系。結(jié)果表明,口環(huán)間隙對泵腔的靜壓力和流動速度都有一定影響；沖壓泵的口環(huán)間隙為零,鑄造泵為0.25mm,比較它們在設(shè)計工況下的揚(yáng)程效率,沖壓泵提高百分比分別為5.16%、2.25%。 6.通過改變Fluent里的設(shè)置項粗糙高度,研究葉輪內(nèi)流道粗糙度對泵性能的影響。結(jié)果表明,粗糙度對揚(yáng)程效率影響比較顯著,而對內(nèi)流場變化影響不大。受粗糙度影響,沖壓泵比鑄造泵揚(yáng)程效率提高的百分點分別為2.22%和2.86%。 7.與企業(yè)合作制造樣機(jī),并在企業(yè)的試驗平臺上對部分方案進(jìn)行試驗研究。結(jié)果顯示試驗數(shù)據(jù)中揚(yáng)程普遍比模擬結(jié)果略高而效率比模擬結(jié)果稍低,但變化趨勢與模擬結(jié)果一致,證明模擬結(jié)果的可靠性。 本文對比研究沖壓泵和鑄造泵的成果只是階段性的,在此基礎(chǔ)上還需進(jìn)一步深入研究,為離心泵的發(fā)展應(yīng)用提供堅實的理論和實踐基礎(chǔ)。
[Abstract]:Stamping and welding centrifugal pump has many advantages such as smooth surface, clean and environmental protection, saving time and material in manufacturing process, better hydraulic performance than casting pump, long service life, convenient maintenance and replacement, etc., which has become the main direction of pump development in the future. The efficiency technical index of punching pump is often higher than that of national standard, and the efficiency technical index of casting pump is often lower than that of national standard. Therefore, this paper selects DQ100-64-22 type punching pump as the research object. A comparative study on the efficiency of punching pump and casting pump was carried out by means of CFD numerical simulation, and the relationship between the scheme of some structures and the efficiency of head was analyzed theoretically and experimentally. The main work and results of this paper are as follows: 1. Through consulting a lot of data, the paper introduces in detail the research results of stamping pump design theory and design method at home and abroad, compares the design method and manufacturing technology of punching pump and casting pump, and compares the structure of punching pump and casting pump. It is found that there are great differences in the structure of blade shape, blade thickness, mouth ring clearance and impeller roughness. 2. The single stage hydraulic model of DQ100-64-22 multistage punching pump is established by using Pro/E software. The boundary conditions are defined by using Gambit to draw the fluid grid, and then the static pressure, velocity and total pressure of the internal flow field are analyzed by Fluent simulation. The external characteristic parameters such as lift efficiency are obtained by post-processing method. 3. The internal flow field and lift efficiency are simulated and analyzed for three kinds of blade types, I. e., straight blade, chamfer blade and spatial blade tilting. The results show that the chamfering and tilting of the blade have little effect on the pump, and the straight blade has a great influence on the internal flow field and hydraulic performance, but it has little effect on the small flow rate. The results show that the blade shape of straight vane is suitable for low specific speed, and the impeller and casting pump are less affected by blade mold. 4. The simulation results of d model with different blade thickness were studied. It is found that the flow pattern and performance of the inner flow field change slightly at d=2mm, and that the flow field and performance are greatly affected when the casting pump is in the range of d=3mm. Comparing the thickness of stamping pump blade d=1mm with casting pump blade thickness d-3 mm, the percentage of lift efficiency improvement is 2.85% and 3.34 mm respectively. 5. The relationship between gap and lift efficiency is analyzed. The results show that the gap of orifice ring has a certain influence on the static pressure and velocity of the pump cavity, and the clearance of the punching pump is zero and the casting pump is 0.25 mm. Compared with their lift efficiency under the design conditions, the ramjet pump increases by 5.16% and 2.25% respectively. 6. The influence of impeller flow channel roughness on pump performance was studied by changing the rough height of the set term in Fluent. The results show that the roughness has a significant effect on the lift efficiency, but has little effect on the internal flow field. Under the influence of roughness, the efficiency of the head of the punching pump is increased by 2.22% and 2.86% than that of the casting pump, respectively. 7. Cooperate with the enterprise to manufacture the prototype, and carry on the test research on the test platform of the enterprise. The results show that the head of the test data is generally higher than the simulation results and the efficiency is slightly lower than that of the simulation results, but the variation trend is consistent with the simulation results, which proves the reliability of the simulation results. In this paper, the results of comparative study on punching pump and casting pump are only phased, and on this basis, it is necessary to further study, to provide a solid theoretical and practical basis for the development and application of centrifugal pump.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH311

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 朱紅耕;鄢必鵬;周濟(jì)人;;壁面粗糙度對軸流泵水力性能影響的研究[J];灌溉排水學(xué)報;2006年01期

2 柴常謙;賢英劍;尚加峰;;離心泵葉片的雙圓弧法設(shè)計分析[J];黃河水利職業(yè)技術(shù)學(xué)院學(xué)報;2008年03期

3 施衛(wèi)東;張啟華;陸偉剛;;新型井泵水力設(shè)計及內(nèi)部流動的數(shù)值模擬[J];江蘇大學(xué)學(xué)報(自然科學(xué)版);2006年06期

4 朱玉才,吳玉林,潘愛先,李莉,曲衍國,于京諾,王亮申,何希杰;離心式固液兩相流泵葉片形狀對流體動力特性影響的研究[J];機(jī)械工程學(xué)報;2004年08期

5 錢家祥　,童志成　,陳文正;沖壓泵的特點及其應(yīng)用[J];流體機(jī)械;1999年08期

6 楊軍虎,趙萬勇,金平;極低比轉(zhuǎn)速葉輪內(nèi)流體的流動分析和葉輪的設(shè)計[J];流體機(jī)械;2001年07期

7 陳魚;費振桃;蔡永雄;楊任;李文廣;;輸送清水時口環(huán)間隙對離心油泵性能的影響[J];流體機(jī)械;2006年01期

8 施衛(wèi)東,李偉,劉厚林,曹衛(wèi)東,孔繁余;國內(nèi)泵業(yè)技術(shù)現(xiàn)狀與發(fā)展趨勢[J];農(nóng)機(jī)化研究;2005年05期

9 李龍,王澤;粗糙度對軸流泵性能影響的數(shù)值模擬研究[J];農(nóng)業(yè)工程學(xué)報;2004年01期

10 劉元義;低比轉(zhuǎn)數(shù)沖壓焊接離心泵粘性設(shè)計方法及其應(yīng)用[J];農(nóng)業(yè)機(jī)械學(xué)報;2005年04期

，

本文編號：1863124