本文選題：壓電驅(qū)動(dòng) + 超聲懸浮��； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：非接觸式懸浮支撐是高轉(zhuǎn)速精密傳動(dòng)系統(tǒng)中重要的減摩途徑�；趬弘婒�(qū)動(dòng)的超聲懸浮技術(shù)是一種能夠有效降低摩擦并且易于控制的新型懸浮支撐技術(shù)。由于超聲懸浮技術(shù)衍生出的超聲懸浮軸承克服了傳統(tǒng)非接觸式懸浮支撐的局限,在高轉(zhuǎn)速精密傳動(dòng)系統(tǒng)的非接觸懸浮支撐領(lǐng)域優(yōu)勢(shì)顯著。本文以高轉(zhuǎn)速、低摩擦為目標(biāo),通過對(duì)懸浮承載特性進(jìn)行理論建模和實(shí)驗(yàn)測(cè)試,對(duì)新型超聲懸浮軸承的徑向承載特性開展深入研究。開展非均勻氣膜徑向承載特性研究,分析不同懸浮位置處的非均勻擠壓氣膜的結(jié)構(gòu)�；诜蔷�性聲學(xué)理論,從振動(dòng)形式、平均能量和運(yùn)動(dòng)受力三個(gè)角度解釋懸浮機(jī)理�；诹黧w動(dòng)力學(xué)理論中的理想流體雷諾方程,采用數(shù)值分析的方法對(duì)二階非線性拋物線型偏微分方程進(jìn)行差分求解,計(jì)算非均勻氣膜氣壓分布。分析壓電換能器驅(qū)動(dòng)特性參數(shù)、流場(chǎng)介質(zhì)物流屬性及輻射面輪廓結(jié)構(gòu)對(duì)懸浮承載特性的影響,選取合適的壓電換能器結(jié)構(gòu)參數(shù)及超聲懸浮軸承工況條件。從流體微元的平衡方程和運(yùn)動(dòng)方程出發(fā),推導(dǎo)沿運(yùn)動(dòng)方向上的慣性項(xiàng)并對(duì)理想流體雷諾方程進(jìn)行修正,考慮慣性效應(yīng)對(duì)邊界氣膜處壓力進(jìn)行分析。建立服從正態(tài)分布規(guī)律的表面粗糙度隨機(jī)分布函數(shù),對(duì)非均勻氣膜結(jié)構(gòu)進(jìn)行修正,基于平均流量模型重新推導(dǎo)同時(shí)考慮流體微元慣性、表面形貌及稀薄效應(yīng)因素的懸浮力模型,分析修正后的壓力流量因子隨表面紋向系數(shù)和粗糙度標(biāo)準(zhǔn)差的變化規(guī)律及表面形貌對(duì)懸浮承載特性的影響。對(duì)高速回轉(zhuǎn)工況下的氣膜懸浮力模型和動(dòng)態(tài)摩擦力矩進(jìn)行修正,揭示回轉(zhuǎn)轉(zhuǎn)速對(duì)氣膜懸浮承載特性影響�；诔晳腋≥S承的工作原理及對(duì)非均勻氣膜懸浮承載特性的分析,研制超聲懸浮軸承原理樣機(jī)。結(jié)合梅森等效電路,建立了縱彎復(fù)合型壓電換能器的聲電等效網(wǎng)絡(luò)模型。借助有限元法對(duì)壓電換能器進(jìn)行模態(tài)分析和諧響應(yīng)分析。采用阻抗分析儀驗(yàn)證壓電換能器聲電等效網(wǎng)絡(luò)模型的正確性,并依據(jù)阻抗模和相位角的測(cè)試結(jié)果對(duì)壓電換能器進(jìn)行阻抗匹配。搭建單換能器式和組合換能器式超聲懸浮軸承測(cè)試系統(tǒng),對(duì)超聲懸浮軸承開展靜態(tài)懸浮承載特性及回轉(zhuǎn)工況下動(dòng)態(tài)承載特性的測(cè)試實(shí)驗(yàn),驗(yàn)證懸浮力理論模型的正確性和揭示回轉(zhuǎn)轉(zhuǎn)速對(duì)轉(zhuǎn)子軸心軌跡及摩擦力矩的影響規(guī)律。
[Abstract]:Non-contact suspension support is an important way to reduce friction in high-speed precision transmission system. Ultrasonic suspension technology based on piezoelectric drive is a new type of suspension support technology which can effectively reduce friction and is easy to control. Because the ultrasonic suspension bearing derived from ultrasonic suspension technology overcomes the limitation of traditional non-contact suspension support, it has a significant advantage in the field of non-contact suspension support of high-speed precision transmission system. With the aim of high speed and low friction, the radial bearing characteristics of new ultrasonic suspension bearing are studied by theoretical modeling and experimental test. The radial bearing characteristics of non-uniform film are studied and the structure of non-uniform extrusion film at different suspension position is analyzed. Based on the theory of nonlinear acoustics, the suspension mechanism is explained from three angles: vibration form, average energy and moving force. Based on the Reynolds equation of ideal fluid in the theory of fluid dynamics, the second order nonlinear parabolic partial differential equation is solved by numerical analysis, and the gas pressure distribution of non-uniform film is calculated. The effects of driving characteristic parameters of piezoelectric transducer, flow field medium logistics properties and radiation profile on suspension bearing characteristics are analyzed. Appropriate piezoelectric transducer structure parameters and operating conditions of ultrasonic suspension bearing are selected. Based on the equilibrium equation and motion equation of fluid element, the inertial term along the direction of motion is derived, and the Reynolds equation of ideal fluid is modified, and the pressure at the boundary gas film is analyzed considering the inertial effect. The random distribution function of surface roughness is established, and the structure of non-uniform gas film is modified. Based on the average flow model, the suspension force model considering the inertia, surface morphology and rarefaction effect of fluid microelement is rededuced. The variation law of the modified pressure flow factor with the surface ripple coefficient and the roughness standard deviation and the influence of the surface morphology on the bearing characteristics of the suspension are analyzed. The film suspension force model and dynamic friction torque under high speed rotating condition were modified to reveal the influence of rotary speed on the bearing characteristics of film suspension. Based on the working principle of ultrasonic suspension bearing and the analysis of the bearing characteristics of non-uniform film suspension, a prototype of ultrasonic suspension bearing principle is developed. Combined with Mason equivalent circuit, the acoustoelectric equivalent network model of longitudinal bending composite piezoelectric transducer is established. Modal analysis and harmonic response analysis of piezoelectric transducer are carried out by means of finite element method. The acoustoelectric equivalent network model of piezoelectric transducer is verified by impedance analyzer, and the impedance matching of piezoelectric transducer is carried out according to the measurement results of impedance mode and phase angle. The testing system of ultrasonic suspension bearing with single transducer and combined transducer is built. The static and dynamic load bearing characteristics of ultrasonic suspension bearing are tested. The correctness of the suspension force model is verified and the influence of rotating speed on the axis trajectory and friction moment of rotor is revealed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 陳超;王均山;劉通;;超聲懸浮式陀螺的結(jié)構(gòu)設(shè)計(jì)及懸浮特性分析[J];振動(dòng).測(cè)試與診斷;2013年06期

2 潘松;王冬;黃衛(wèi)清;;基于超聲懸浮軸承的微扭矩測(cè)量系統(tǒng)[J];傳感器與微系統(tǒng);2010年07期

3 田豐君;車小紅;楊志剛;姜斌;姚雪峰;;雙向支撐超聲波懸浮軸承的設(shè)計(jì)[J];光學(xué)精密工程;2009年04期

4 景敏卿;劉恒;沈園;虞烈;;新型擠壓膜氣體軸承的研究[J];西安交通大學(xué)學(xué)報(bào);2008年07期

5 常穎,楊志剛,吳博達(dá),程光明,田豐君,彭太江;超聲波軸承懸浮性能及承載能力的實(shí)驗(yàn)研究[J];壓電與聲光;2005年02期

6 常穎,吳博達(dá),楊志剛,程光明,田豐君;超聲波懸浮推力軸承承載能力及減摩性能[J];吉林大學(xué)學(xué)報(bào)(工學(xué)版);2004年02期

相關(guān)博士學(xué)位論文 前1條

1 田豐君;基于夾心式壓電換能器的超聲波近場(chǎng)聲懸浮支撐技術(shù)研究[D];吉林大學(xué);2010年

相關(guān)碩士學(xué)位論文 前8條

1 王均山;近聲場(chǎng)懸浮式壓電作動(dòng)器及其在陀螺儀中的應(yīng)用[D];南京航空航天大學(xué);2014年

2 李繁;超聲懸浮式球轉(zhuǎn)子陀螺的動(dòng)力學(xué)設(shè)計(jì)與試驗(yàn)研究[D];南京航空航天大學(xué);2012年

3 朱達(dá)云;超聲激勵(lì)的氣體擠壓膜直線導(dǎo)軌及其控制器的研究[D];南京航空航天大學(xué);2012年

4 王冬;超聲懸浮軸承及微小電機(jī)機(jī)械特性測(cè)試技術(shù)研究[D];南京航空航天大學(xué);2010年

5 唐方圓;凹柱面支撐超聲波懸浮軸承設(shè)計(jì)與實(shí)驗(yàn)研究[D];吉林大學(xué);2009年

6 賈兵;超聲離合器的設(shè)計(jì)及應(yīng)用[D];南京航空航天大學(xué);2009年

7 車小紅;雙向支撐超聲波懸浮軸承的設(shè)計(jì)及實(shí)驗(yàn)研究[D];吉林大學(xué);2008年

8 田豐君;超聲波推力軸承理論及實(shí)驗(yàn)的初步研究[D];吉林大學(xué);2004年

，

本文編號(hào)：1866220