本文選題：波箔　切入點(diǎn)：氣體軸承　出處：《南京航空航天大學(xué)》2012年碩士論文

【摘要】：波箔軸承主要由平箔、波箔和軸承殼體組成，它是一種以柔性表面為支承的自作用式流體動(dòng)壓軸承，與傳統(tǒng)的氣體軸承相比，波箔軸承具有運(yùn)行壽命長(zhǎng)、可靠性高、承載能力大，，耐高溫能力強(qiáng)以及高轉(zhuǎn)速等特點(diǎn)。 本文以Hydresil型波箔動(dòng)壓氣體軸承為研究對(duì)象。采用殼模型計(jì)算波箔的剛度，用有限差分法、牛頓-拉普森迭代法耦合求解壓力控制Reynolds方程和氣膜厚度方程，分析轉(zhuǎn)速以及偏心率對(duì)軸承承載能力、偏位角、摩擦轉(zhuǎn)矩等靜態(tài)特性的影響。采用小擾動(dòng)法，將壓力、氣膜厚度和箔片徑向變形分別在平衡位置以位移和速度擾動(dòng)微量按泰勒級(jí)數(shù)展開(kāi)，代入雷諾方程歸類(lèi)整理出關(guān)于壓力和氣膜厚度擾動(dòng)微量的微分方程，再通過(guò)箔片變形與膜厚變化的關(guān)系以及壓力與箔片變形的平衡關(guān)系，建立壓力和膜厚擾動(dòng)微量的其他關(guān)系表達(dá)式，求解關(guān)于擾動(dòng)微量的方程，計(jì)算軸承的動(dòng)態(tài)特性系數(shù)，并討論偏心率、轉(zhuǎn)速和擾動(dòng)頻率對(duì)動(dòng)特性系數(shù)的影響�？紤]氣膜與平箔之間的熱傳導(dǎo)和軸頸的溫度變化，而忽略波箔、軸承基座等的熱傳導(dǎo)，并考慮潤(rùn)滑氣體的粘溫關(guān)系，建立關(guān)于潤(rùn)滑氣體的簡(jiǎn)化了的三維傳熱模型，通過(guò)離散氣膜的能量方程，計(jì)算氣膜的溫度分布。 實(shí)驗(yàn)方面，設(shè)計(jì)制作了箔片成型夾持裝置以及摩擦力矩的測(cè)量裝置，搭建了專(zhuān)門(mén)的彈性箔片動(dòng)壓氣體軸承實(shí)驗(yàn)臺(tái)，包括實(shí)驗(yàn)臺(tái)本體、潤(rùn)滑冷卻系統(tǒng)和測(cè)量系統(tǒng)。以鈹青銅為材料，采用專(zhuān)用模具加工制作平箔和波箔，并裝配波箔軸承。對(duì)實(shí)驗(yàn)臺(tái)的振動(dòng)特性進(jìn)行了測(cè)試及調(diào)試，測(cè)量波箔軸承的徑向位移、摩擦力矩以及氣膜的溫度場(chǎng)分布。
[Abstract]:Wave foil bearing is mainly composed of flat foil, wave foil and bearing shell. It is a self-acting hydrodynamic bearing supported on flexible surface. Compared with traditional gas bearing, wave foil bearing has long service life and high reliability. High bearing capacity, high temperature resistance and high speed. In this paper, the dynamic pressure gas bearing of Hydresil type wave foil is studied. The shell model is used to calculate the stiffness of the foil. The finite difference method and Newton-Raphson iterative method are used to solve the pressure control Reynolds equation and the gas film thickness equation. The effects of rotational speed and eccentricity on bearing bearing capacity, offset angle, friction torque and other static characteristics are analyzed. The film thickness and the radial deformation of the foil are expanded according to Taylor series by displacement and velocity perturbation at the equilibrium position respectively, and the differential equations about the perturbation of pressure and film thickness are sorted out by the Reynolds equation. Then through the relationship between foil deformation and film thickness change and the balance relationship between pressure and foil deformation, the other relation expressions of pressure and film thickness perturbation trace are established, and the equation of disturbance trace is solved, and the dynamic characteristic coefficient of bearing is calculated. The influence of eccentricity, rotational speed and disturbance frequency on the dynamic characteristic coefficient is discussed. The heat conduction between the film and the flat foil and the temperature change of the journal are considered, while the heat conduction of the wave foil, bearing base, etc., and the viscous temperature relation of the lubricating gas are considered. A simplified three-dimensional heat transfer model for lubricating gas is established. The temperature distribution of the film is calculated by the discrete energy equation of the film. In the aspect of experiment, the foil forming and clamping device and the measuring device of friction torque are designed and manufactured, and a special experimental platform of elastic foil dynamic pressure gas bearing is built, including the body of the test table. Lubricating cooling system and measuring system. Using beryllium bronze as material, the flat foil and wave foil are manufactured by special mould, and the wave foil bearing is assembled. The vibration characteristics of the test stand are tested and debugged, and the radial displacement of the wave foil bearing is measured. Friction moment and temperature field distribution of the film.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH133.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 閆靜,左敦穩(wěn),王珉;雙軸柔性滾彎過(guò)程中工件回彈的理論分析[J];兵工學(xué)報(bào);2003年03期

2 湯皎寧，謝友柏;Ni－P－PTFE復(fù)合鍍層應(yīng)用研究[J];材料保護(hù);1995年07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 姚海，陳純正，吳亦農(nóng);低溫透平膨脹機(jī)動(dòng)壓氣體軸承表面鍍層的研究[J];低溫與特氣;1994年03期

5 樊毅,劉伯威;用作氣體動(dòng)壓軸承的微晶碳化硼材料[J];粉末冶金材料科學(xué)與工程;2003年04期

6 龔煥孫;波箔軸承中波箔剛度的計(jì)算[J];上海機(jī)械學(xué)院學(xué)報(bào);1980年04期

7 賀金星;波箔軸承中波箔總靜剛度分析[J];上海機(jī)械學(xué)院學(xué)報(bào);1983年01期

8 龔煥孫,張鴻興,周?chē)?guó)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

9 龔煥孫,張鴻興,張臺(tái)維,周?chē)?guó)明;徑向波箔軸承的設(shè)計(jì)計(jì)算和試驗(yàn)研究——(Ⅱ)幾何參數(shù)計(jì)算和實(shí)驗(yàn)研究[J];上海機(jī)械學(xué)院學(xué)報(bào);1992年02期

10 趙培炎，劉政華，陳國(guó)宏，趙翔;氣體動(dòng)壓軸承氣膜剛度測(cè)試系統(tǒng)[J];航空精密制造技術(shù);1994年03期

本文編號(hào)：1674077