本文選題：水潤(rùn)滑 + 橡膠軸承��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：本文以水潤(rùn)滑橡膠軸承為研究對(duì)象,基于橡膠襯層的彈性變形和流體動(dòng)力潤(rùn)滑理論,并考慮潤(rùn)滑介質(zhì)溫度對(duì)水潤(rùn)滑橡膠軸承潤(rùn)滑特性的影響,建立了水潤(rùn)滑橡膠軸承雙向熱流固耦合模型。采用有限元法和有限體積法,討論了水潤(rùn)滑橡膠軸承熱彈流潤(rùn)滑特性,并研究了不同參數(shù)對(duì)水潤(rùn)滑橡膠軸承熱彈流潤(rùn)滑特性的影響。其主要內(nèi)容和結(jié)論如下:(1)建立了水潤(rùn)滑橡膠軸承雙向熱流固耦合模型,通過(guò)對(duì)軸承實(shí)際運(yùn)轉(zhuǎn)情況的分析,確定合適的邊界條件,并給出了水潤(rùn)滑橡膠軸承水膜承載力、摩擦力和摩擦系數(shù)的計(jì)算方法。對(duì)橡膠襯層材料進(jìn)行參數(shù)試驗(yàn),通過(guò)實(shí)驗(yàn)得到表征橡膠材料力學(xué)性能的模型參數(shù),結(jié)合研究?jī)?nèi)容的實(shí)際狀況確定了所用材料的參數(shù)。(2)針對(duì)十六溝槽的水潤(rùn)滑橡膠軸承,分析了進(jìn)水溫度對(duì)其潤(rùn)滑特性的影響,分別研究了水膜壓力、流場(chǎng)速度以及橡膠襯層變形的變化,并計(jì)算了水膜承載力、摩擦力和摩擦系數(shù)。研究結(jié)果表明:潤(rùn)滑介質(zhì)溫度較低時(shí),流體動(dòng)壓效應(yīng)越好,水膜壓力越大,橡膠襯層變形量也隨之增大;與高溫潤(rùn)滑狀態(tài)相比,低溫下水的粘度較大,水膜連續(xù)性更好,承載力增大。(3)基于水潤(rùn)滑橡膠軸承雙向熱流固耦合模型,討論了軸頸轉(zhuǎn)速,偏心率以及鹽水濃度對(duì)水潤(rùn)滑橡膠軸承熱彈流潤(rùn)滑特性的影響。結(jié)果表明:隨著軸頸轉(zhuǎn)速和偏心率增大,水膜壓力和橡膠襯層的變形量增大,承載力提高,摩擦系數(shù)降低。但偏心率過(guò)大或過(guò)小都不利于水膜的連續(xù)性。在一定范圍內(nèi)轉(zhuǎn)速越大,水膜連續(xù)性越好;與清水相比,鹽水潤(rùn)滑條件下的水膜壓力、橡膠襯層變形量以及承載力均增大,摩擦系數(shù)減小。
[Abstract]:Based on the theory of elastic deformation and hydrodynamic lubrication of rubber liner, the influence of temperature of lubricating medium on lubricating characteristics of water lubricated rubber bearing is considered in this paper. A two-way heat-fluid-solid coupling model for water-lubricated rubber bearings is established. The characteristics of thermo-elastohydrodynamic lubrication of water-lubricated rubber bearings were discussed by finite element method and finite volume method, and the effects of different parameters on thermo-elastohydrodynamic lubrication of water-lubricated rubber bearings were studied. The main contents and conclusions are as follows: (1) the bidirectional heat fluid-solid coupling model of water lubricated rubber bearing is established. Through the analysis of the actual operation of the bearing, the proper boundary conditions are determined, and the bearing capacity of water film of water lubricated rubber bearing is given. The calculation method of friction force and friction coefficient. The parameters of rubber lining materials were tested, and the model parameters were obtained to characterize the mechanical properties of rubber materials. According to the actual situation of the research contents, the parameters of the materials used were determined. (2) the water-lubricated rubber bearings with sixteen grooves were used. The influence of influent temperature on the lubricating properties was analyzed. The changes of water film pressure, flow field velocity and rubber liner deformation were studied, and the bearing capacity, friction force and friction coefficient of water film were calculated. The results show that when the temperature of lubricating medium is low, the better the hydrodynamic pressure effect is, the greater the water film pressure is, the more the deformation of rubber lining is, and the higher the viscosity of low temperature water is, the better the continuity of water film is compared with the high temperature lubrication state. Based on the bidirectional heat fluid-solid coupling model of water-lubricated rubber bearings, the effects of journal speed, eccentricity and salt water concentration on the thermo-elastohydrodynamic lubrication characteristics of water-lubricated rubber bearings are discussed. The results show that the water film pressure and the deformation of rubber liner increase with the increase of journal speed and eccentricity, the bearing capacity increases and the friction coefficient decreases. However, too large or too small heart rate is not conducive to the continuity of the water film. The higher the rotational speed in a certain range, the better the continuity of water film. Compared with clear water, the water film pressure, deformation and bearing capacity of rubber lining under brine lubrication condition are increased, and the friction coefficient is reduced.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.3

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