本文選題：除霧器清洗離心泵　切入點：數(shù)值模擬　出處：《華北電力大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文以某電廠脫硫系統(tǒng)除霧器清洗離心泵為例,現(xiàn)場進(jìn)行測量并得到測量數(shù)據(jù),根據(jù)泵的設(shè)計手冊利用AutoCAD制圖軟件繪制葉輪軸測圖和木模圖,對葉輪本體進(jìn)行三維建模,利用布爾運算得到葉輪流道的三維模型,再設(shè)計出與之匹配的梯形蝸殼流道模型,并將兩者進(jìn)行耦合,得到離心泵完整的三維流道。利用Gambit對離心泵完整的三維流道進(jìn)行網(wǎng)格劃分后,通過Fluent數(shù)值模擬軟件,采用SIMPLE算法并選用標(biāo)準(zhǔn)k-ε模型對離心泵流場進(jìn)行三維穩(wěn)態(tài)定常計算,把不同工況下離心泵內(nèi)部流場情況進(jìn)行比較,根據(jù)模擬結(jié)果繪制出泵的性能曲線并和現(xiàn)場運行值做對比。使用葉輪出口壓力法計算得到離心泵的徑向力與流量的變化規(guī)律。借助于ANSYS Workbench有限元軟件對離心泵葉輪轉(zhuǎn)子進(jìn)行模態(tài)分析和諧響應(yīng)分析。其中,利用模態(tài)分析對葉輪轉(zhuǎn)子系統(tǒng)進(jìn)行了材料和邊界條件的設(shè)置,并計算得到了前八階結(jié)構(gòu)的固有頻率和模態(tài)振型,分析了其振動屬性。而諧響應(yīng)分析采用模態(tài)疊加法在模態(tài)分析的基礎(chǔ)上進(jìn)一步分析,通過加載徑向力載荷條件進(jìn)行了計算,并分別對葉輪轉(zhuǎn)子結(jié)構(gòu)的某一點和整體兩種方法進(jìn)行分析,得到了葉輪轉(zhuǎn)子結(jié)構(gòu)在不同工況、不同頻率下的振動特性。
[Abstract]:In this paper, the cleaning centrifugal pump of desulphurization system in a power plant is taken as an example, the field measurement is carried out and the measurement data are obtained. According to the pump design manual, the impeller shaft mapping and wood model drawing are drawn by using AutoCAD drawing software, and the impeller body is modeled in three dimensions. The three-dimensional model of impeller runner is obtained by Boolean operation, and the trapezoidal volute flow channel model is designed, and the two models are coupled. The complete three-dimensional flow channel of centrifugal pump is obtained. After meshing the complete three-dimensional flow channel of centrifugal pump with Gambit, the three-dimensional steady steady state calculation of centrifugal pump flow field is carried out by using SIMPLE algorithm and standard k- 蔚 model through Fluent numerical simulation software. The internal flow field of centrifugal pump under different working conditions is compared. According to the simulation results, the pump performance curve was drawn and compared with the field operation value. The radial force and flow rate of centrifugal pump were calculated by using the impeller outlet pressure method. The centrifugal pump blade was calculated by ANSYS Workbench finite element software. The modal analysis of the wheel rotor is carried out and the harmonic response is analyzed. The material and boundary conditions of the impeller rotor system are set by modal analysis, and the natural frequencies and modal modes of the first eight order structures are calculated. The vibration properties are analyzed, and the modal superposition method is used to analyze the vibration properties of the vibration response, and the radial load condition is calculated by loading radial force. The vibration characteristics of impeller rotor structure under different working conditions and different frequencies are obtained by analyzing the two methods of impeller rotor structure.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH311

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相關(guān)碩士學(xué)位論文 前4條

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本文編號：1583000