本文選題：離心壓縮機(jī)　切入點：葉輪　出處：《華中科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：離心壓縮機(jī)被廣泛應(yīng)用于石油、化工和冶金等各個領(lǐng)域。作為衡量一個國家重大裝備制造業(yè)發(fā)展水平的標(biāo)志性設(shè)備之一的大型離心壓縮機(jī)技術(shù)含量高，開發(fā)、制造難度大。壓縮機(jī)的葉輪是它的核心部件，轉(zhuǎn)子組系統(tǒng)的運轉(zhuǎn)的安全性對于整個機(jī)組的可靠性有著至關(guān)重要的影響。因此，對離心壓縮機(jī)葉輪的強度應(yīng)力分析和轉(zhuǎn)子組的動態(tài)分析，是高速離心壓縮機(jī)設(shè)計中必須解決的關(guān)鍵技術(shù)問題。 本文針對某大型國產(chǎn)離心壓縮機(jī)葉輪進(jìn)行研究，利用Solidworks進(jìn)行建模，然后用有限元分析模塊對葉輪進(jìn)行數(shù)值計算。結(jié)果表明產(chǎn)品的最大應(yīng)力值在葉輪出口的葉片和輪盤的交接處。通過修改輪盤的厚度來優(yōu)化設(shè)計葉輪。計算結(jié)果表明，在保證葉輪足夠強度的情況下，通過優(yōu)化輪盤的厚度能降低葉輪的最大應(yīng)力值，這為葉輪結(jié)構(gòu)設(shè)計提供了設(shè)計準(zhǔn)則。 對某大型國產(chǎn)雙級雙吸壓縮機(jī)中的轉(zhuǎn)子組進(jìn)行動態(tài)分析，發(fā)現(xiàn)通過修改軸徑和葉輪的重量兩個參數(shù)可以避免轉(zhuǎn)子的共振現(xiàn)象。其中葉輪的重量是通過修改輪蓋的厚度來實現(xiàn)的。研究結(jié)果為如何避免發(fā)生共振現(xiàn)象提供了理論基礎(chǔ)，并為轉(zhuǎn)子組的設(shè)計提供了設(shè)計準(zhǔn)則。 本文的研究成果，，不僅對降低離心壓縮機(jī)葉輪的最大應(yīng)力值具有一定的指導(dǎo)意義，而且對優(yōu)化設(shè)計轉(zhuǎn)子組也有著一定的參考價值。
[Abstract]:Centrifugal compressors are widely used in petroleum, chemical, metallurgical and other fields. As one of the landmark equipments to measure the development level of major equipment manufacturing industry in a country, large centrifugal compressors have high technical content and development. The impeller of the compressor is its core component, and the safety of the rotor group system has a vital effect on the reliability of the whole unit. The strength stress analysis of centrifugal compressor impeller and the dynamic analysis of rotor group are the key technical problems that must be solved in the design of high speed centrifugal compressor. In this paper, the impeller of a large scale centrifugal compressor is studied, and the model is built by Solidworks. Then the finite element analysis module is used to calculate the impeller numerically. The results show that the maximum stress value of the product is at the junction of the blade and the disk at the outlet of the impeller. The impeller is optimized by modifying the thickness of the wheel. The maximum stress value of impeller can be reduced by optimizing the thickness of impeller under the condition of guaranteeing the sufficient strength of impeller, which provides the design criterion for impeller structure design. The dynamic analysis of rotor group in a large domestic double stage double suction compressor is carried out. It is found that the rotor resonance can be avoided by modifying the axial diameter and the weight of the impeller, in which the weight of the impeller is realized by modifying the thickness of the cover. The results provide a theoretical basis for how to avoid the resonance phenomenon. It also provides the design criterion for the rotor group design. The research results of this paper not only have certain guiding significance to reduce the maximum stress value of centrifugal compressor impeller, but also have certain reference value to the optimization design of rotor group.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH452

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