本文選題：水潤滑　切入點(diǎn)：飛龍軸承　出處：《青島理工大學(xué)》2015年碩士論文

【摘要】：水的粘度很小,所以用水做潤滑劑時要選用彈性模量遠(yuǎn)遠(yuǎn)小于金屬的飛龍材料制作水潤滑軸承。本文針對飛龍材料的滑動軸承,建立水潤滑的無限長線接觸彈流潤滑模型,運(yùn)用多重網(wǎng)格法來求解Reynolds方程,用多重網(wǎng)格積分法求得膜厚方程中的彈性變形項(xiàng),運(yùn)用逐列掃描法求解能量的方程,得到了不同因素影響下的水潤滑飛龍滑動軸承的彈流潤滑數(shù)值解。主要影響因素包括:溫度、表面粗糙度、微凹坑織構(gòu)、固體顆粒以及外部沖擊載荷等影響因素。首先,對水潤滑飛龍滑動軸承進(jìn)行穩(wěn)態(tài)等溫彈流潤滑分析。數(shù)值分析得到水潤滑飛龍軸承壓力和膜厚的分布規(guī)律;探討了不同載荷、轉(zhuǎn)速的大小對水潤滑飛龍軸承入口區(qū)壓力、壓力峰和膜厚的影響,并比較了三種不同塑料材料的水潤滑性能。其次,對水潤滑飛龍滑動軸承進(jìn)行考慮表面粗糙度的熱彈流潤滑分析。對比分析等溫彈流解和考慮熱效應(yīng)的彈流數(shù)值解;探討了考慮余弦表面粗糙度對水潤滑飛龍軸承壓力和膜厚的影響,以及水潤滑膜壓力和膜厚隨粗糙度幅值和波長的變化規(guī)律。第三,建立了微凹坑織構(gòu)的摩擦副模型,得到了圓弧形、矩形以及直角三角形三種微凹坑織構(gòu)下水潤滑飛龍軸承的完全數(shù)值解,討論了不同滑滾比下水潤滑飛龍軸承最小膜厚的變化,同時也分析了微凹坑織構(gòu)的深度、凹坑直徑對壓力和膜厚的影響。第四,考慮熱效應(yīng)和軸承間隙中固體顆粒的影響,對水潤滑飛龍軸承進(jìn)行流體潤滑數(shù)值分析。建立含固體顆粒的流體潤滑模型,修正Reynolds方程,數(shù)值模擬得出含固體顆粒時彈流潤滑膜壓力與膜厚的變化情況,與不含顆粒的熱解進(jìn)行對比,研究顆粒尺寸、顆粒位置及軸承相對間隙大小對存在顆粒的飛龍軸承潤滑性能的影響,進(jìn)一步研究粗糙度與固體顆粒同時存在時壓力與膜厚的分布。最后,建立了考慮不同形式的外沖擊載荷的水潤滑飛龍滑動軸承的彈流潤滑幾何模型,數(shù)值模擬了軸承在不同形式?jīng)_擊載荷如階躍、矩形和正弦沖擊載荷影響下的水潤滑膜壓力以及膜厚在不同瞬時的變化趨勢,研究沖擊載荷幅值和脈寬對水潤滑飛龍軸承潤滑性能的影響。
[Abstract]:The viscosity of water is very small, so water should be used as lubricant to make water lubricated bearing with elastic modulus much smaller than metal. In this paper, an infinite line contact elastohydrodynamic lubrication model of water lubrication is established for the sliding bearing of flying dragon. The multigrid method is used to solve the Reynolds equation, the elastic deformation term in the film thickness equation is obtained by the multi-grid integral method, and the energy equation is solved by the row by row scanning method. The numerical solution of EHL of hydrolubricated flying dragon sliding bearing is obtained under the influence of different factors. The main influencing factors include temperature, surface roughness, microcrater texture, solid particle and external impact load, and so on. First of all, the influence factors such as temperature, surface roughness, microcrater texture, solid particle and external impact load are obtained. The steady state isothermal elastohydrodynamic lubrication analysis of water lubricated flying dragon bearing is carried out. The distribution of pressure and film thickness of water lubricated flying dragon bearing is obtained by numerical analysis, and the pressure at the inlet area of water lubricated flying dragon bearing under different loads and rotational speeds is discussed. The effects of pressure peak and film thickness on the water lubricating properties of three different plastic materials were compared. The thermo-elastohydrodynamic lubrication analysis of water-lubricated flying dragon sliding bearing considering surface roughness is carried out. The isothermal elastohydrodynamic solution and the elastohydrodynamic numerical solution considering thermal effect are compared and analyzed. Considering the influence of cosine surface roughness on the pressure and film thickness of water-lubricated flying dragon bearing, the variation of hydrophilic synovium pressure and film thickness with roughness amplitude and wavelength is discussed. Thirdly, the friction pair model of microcrater texture is established. The complete numerical solution of the hydrolubricated flying dragon bearing with circular arc, rectangular and right triangle microcrater texture is obtained. The variation of the minimum film thickness of the hydrolubricated flying dragon bearing with different slip ratio is discussed, and the depth of the microcrater texture is also analyzed. The influence of pit diameter on pressure and film thickness. Fourthly, considering the thermal effect and the influence of solid particles in the bearing clearance, the fluid lubrication model of water lubricated flying dragon bearing is established, and the Reynolds equation is revised. The change of EHL film pressure and film thickness with solid particles was obtained by numerical simulation, and compared with pyrolysis without particles, the particle size was studied. The influence of particle position and relative clearance of bearing on lubrication performance of flying dragon bearing with particle is studied. The distribution of pressure and film thickness when roughness and solid particle exist simultaneously is studied. An elastohydrodynamic geometric model of hydro-lubricated flying dragon sliding bearing with different external impact loads is established, and the numerical simulation of the hydro-hydrodynamic lubrication geometric model of the hydro-hydrodynamic sliding bearing with different forms of impact load, such as step, is presented. The influence of impact load amplitude and pulse width on the lubricating performance of water lubricated flying dragon bearing was studied under the influence of rectangular and sinusoidal impact load on the water moistening synovial film pressure and film thickness in different instantaneous trends.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH133.3

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