發(fā)布時(shí)間：2018-05-28 01:38

  本文選題：波箔式箔片氣體軸承 + 箔片結(jié)構(gòu)　； 參考：《中國科學(xué)院研究生院（工程熱物理研究所）》2011年碩士論文

【摘要】：自從1969年被Garrett AiResearch應(yīng)用于飛機(jī)空氣循環(huán)裝置上,箔片氣體軸承已經(jīng)發(fā)展了四代,軸承的承載力和穩(wěn)定性都有了大幅提高。但到目前為止,箔片軸承發(fā)展的三大難題,即高承載力；良好的高溫啟停特性；可靠的、可控的設(shè)計(jì)方法和設(shè)計(jì)準(zhǔn)則,仍然沒有得到有效地解決。國內(nèi)在箔片軸承研究中還較為落后,根本原因還是對(duì)軸承本身的動(dòng)力學(xué)機(jī)理不清楚。 本文針對(duì)箔片氣體軸承特有的箔片結(jié)構(gòu)進(jìn)行分析,研究箔片結(jié)構(gòu)如何影響軸承性能的以及不同代箔片軸承進(jìn)化的原因。主要內(nèi)容如下： (1)本文對(duì)箔片結(jié)構(gòu)的變形進(jìn)行了相關(guān)計(jì)算,考慮了波箔波紋間的相互作用、箔片結(jié)構(gòu)間的庫侖摩擦、波箔波紋曲面變形等因素,最終得到了波箔波紋的徑向剛度公式以及平箔的變形公式。 (2)本文對(duì)影響平箔和波箔變形的因素進(jìn)行了分析。包括箔片結(jié)構(gòu)的幾何參數(shù)、選用材料以及波箔結(jié)構(gòu)的分布形態(tài)。研究表明,可以通過改變以上三種參數(shù)讓箔片結(jié)構(gòu)的剛度分布更加均勻,剛度更大。 (3)本文建立了等溫條件下考慮平箔和波箔變形、箔片結(jié)構(gòu)內(nèi)庫侖摩擦和波箔波紋間相互作用的模型,通過將氣膜厚度方程和等溫氣體Reynolds方程耦合,利用MATLAB軟件編程計(jì)算。采用承載力和姿態(tài)角作為評(píng)價(jià)軸承承載性能和穩(wěn)定性的參數(shù)。計(jì)算表明,本文采用模型的計(jì)算結(jié)果與NASA試驗(yàn)結(jié)果符合的較好。 (4)本文對(duì)箔片結(jié)構(gòu)對(duì)軸承性能的影響情況進(jìn)行了分析。研究表明,箔片結(jié)構(gòu)的剛度越大,剛度分布越均勻?qū)τ诓S承的承載力和穩(wěn)定性越有好處。箔片結(jié)構(gòu)分布的改變,對(duì)于擴(kuò)大動(dòng)壓氣膜內(nèi)部高壓區(qū)的范圍,以及減弱端泄效應(yīng)有著非常大的作用。依據(jù)本文的結(jié)論,對(duì)箔片軸承結(jié)構(gòu)進(jìn)行優(yōu)化,其優(yōu)化效果非常明顯。
[Abstract]:The foil gas bearing has been developed for four generations since it was applied to the aircraft air circulation unit by Garrett AiResearch in 1969. The bearing capacity and stability have been greatly improved. But up to now, the three major problems in the development of foil bearings, namely, high bearing capacity, good high temperature start and stop characteristics, reliable and controllable design methods and design criteria, have not been solved effectively. The study of foil bearing in China is still relatively backward, the fundamental reason is not clear about the dynamic mechanism of the bearing itself. In this paper, the characteristic foil structure of foil gas bearing is analyzed, and the influence of foil structure on bearing performance and the evolution of foil bearing in different generations are studied. The main contents are as follows: In this paper, the deformation of foil structure is calculated by considering the interaction between ripples, the Coulomb friction between foil structures, the deformation of corrugated surface of foil, and so on. Finally, the radial stiffness formula of ripple and the deformation formula of flat foil are obtained. In this paper, the factors affecting the deformation of flat foil and wave foil are analyzed. It includes the geometric parameters of foil structure, the choice of materials and the distribution of foil structure. The results show that the stiffness distribution of chaff structure can be more uniform and the stiffness is larger by changing the above three parameters. In this paper, a model considering the deformation of foil and foil, Coulomb friction and ripple interaction in foil structure under isothermal condition is established. By coupling the film thickness equation with the Reynolds equation of isothermal gas, the model is calculated by using MATLAB software. Bearing capacity and attitude angle are used as parameters to evaluate bearing performance and stability. The calculation results show that the calculated results of the model are in good agreement with the NASA test results. The influence of foil structure on bearing performance is analyzed in this paper. The results show that the greater the stiffness of the foil structure, the more uniform the stiffness distribution is for the bearing capacity and stability of the foil bearing. The change of foil structure distribution plays an important role in enlarging the range of the high pressure region inside the hydrodynamic film and reducing the end leakage effect. According to the conclusion of this paper, the optimization effect of foil bearing structure is very obvious.
【學(xué)位授予單位】：中國科學(xué)院研究生院（工程熱物理研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH133.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 鄧建,胡連桃,黃昌華,孔華;箔片空氣軸承的新近技術(shù)突破與應(yīng)用進(jìn)展[J];軸承;2004年08期

2 丁增杰;氫氧渦輪泵用箔片軸承的試驗(yàn)研究[J];導(dǎo)彈與航天運(yùn)載技術(shù);1999年05期

3 王兆伍，許尚賢;徑向波箔軸承的動(dòng)特性和穩(wěn)定性分析[J];東南大學(xué)學(xué)報(bào);1995年06期

4 龔煥孫,張鴻興,周國明;徑向波箔軸承的設(shè)計(jì)計(jì)算和試驗(yàn)研究——(Ⅰ)理論分析[J];上海機(jī)械學(xué)院學(xué)報(bào);1991年04期

5 崔明現(xiàn),侯予,王林忠,陳純正;結(jié)構(gòu)剛度和阻尼對(duì)箔片軸承承載力的影響[J];潤滑與密封;2005年05期

6 崔明現(xiàn);侯予;王林忠;陳純正;;波箔軸承結(jié)構(gòu)剛度的計(jì)算[J];潤滑與密封;2006年05期

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本文編號(hào)：1944715