本文關(guān)鍵詞：水基潤滑液潤滑建模及摩擦學(xué)性能研究　出處：《北京交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 水基潤滑液 薄膜潤滑 滑塊 徑向滑動軸承 壓力分布 承載能力

【摘要】：隨著當(dāng)今世界石油消耗的不斷加劇,水基潤滑液作為—種環(huán)境友好型潤滑劑得到迅速發(fā)展,其在微型機械、生物關(guān)節(jié)、金屬加工等領(lǐng)域具有良好的應(yīng)用前景。本文首先在薄膜潤滑狀態(tài)下對水基潤滑液的黏度變化進行了線性逼近,并在此基礎(chǔ)上推導(dǎo)出了潤滑方程。然后在水基潤滑狀態(tài)下對滑塊的特性進行分析。討論了無限長滑塊和有限長滑塊的壓力分布和承載能力隨吸附層厚度、壁面黏度和入口區(qū)潤滑膜厚度的變化關(guān)系。研究表明:楔形間隙所形成的潤滑膜的壓力和承載能力均隨吸附層厚度和壁面黏度的增大而不斷增大,但變化不盡相同;當(dāng)入口區(qū)膜厚在某一范圍內(nèi)變化時,壓力和承載能力均隨其增大而不斷增大,但是入口區(qū)膜厚大于一定值后二者基本不再隨之變化。最后在水基潤滑狀態(tài)下對徑向滑動軸承的特性進行分析。分別討論了吸附層厚度、壁面黏度、偏心率和寬徑比對徑向滑動軸承的潤滑膜壓力分布、承載能力和偏位角的影響。結(jié)果表明:徑向滑動軸承的潤滑膜壓力均隨吸附層厚度、壁面黏度和偏心率增大不斷增大;對于有限長徑向滑動軸承,壓力隨著寬徑比增加而不斷增大。當(dāng)偏心率和寬徑比較小時,徑向滑動軸承的承載能力隨吸附層厚度和壁面黏度的變化較小,隨著偏心率和寬徑比逐漸增大,承載能力的變化越來越明顯:承載能力隨偏心率和寬徑比增加亦不斷增大。徑向滑動軸承的偏位角隨偏心率增加而減小;當(dāng)偏心率較小時偏位角基本不隨吸附層厚度和壁面黏度變化而變化,隨著偏心率不斷增大,偏位角均隨二者的增加而不斷減小;有限長徑向滑動軸承的偏位角隨寬徑比的變化甚微。本文在薄膜潤滑狀態(tài)下,對水基潤滑的滑塊和徑向滑動軸承的特性進行了分析,為水基潤滑液的應(yīng)用奠定了堅實的理論基礎(chǔ)。
[Abstract]:With the increasing oil consumption in the world, water-based lubricating fluid as a kind of environment-friendly lubricant has been developed rapidly in micro-machinery, biological joints. Metal processing and other fields have good application prospects. Firstly, the viscosity of water-based lubricating fluid is approximated linearly under the condition of thin film lubrication. On this basis, the lubrication equation is derived, and then the characteristics of the slider are analyzed under the condition of water-based lubrication. The pressure distribution and bearing capacity of the infinite slider and the finite slider with the thickness of the adsorption layer are discussed. The relationship between the wall viscosity and the thickness of the lubricating film in the inlet region. The results show that the pressure and the bearing capacity of the lubricating film formed by the wedge clearance increase with the increase of the thickness of the adsorption layer and the viscosity of the wall. But the change is not the same; When the thickness of the film in the inlet region changes in a certain range, the pressure and the bearing capacity increase with the increase of the film thickness. However, the film thickness of the inlet area is larger than a certain value and the two will not change. Finally, the characteristics of the radial sliding bearing are analyzed under the water base lubrication. The thickness of the adsorption layer and the viscosity of the wall are discussed respectively. The effects of eccentricity and ratio of width to diameter on the pressure distribution, bearing capacity and offset angle of the lubricating film of radial sliding bearing are discussed. The results show that the pressure of lubrication film of radial sliding bearing all depends on the thickness of the adsorption layer. The wall viscosity and eccentricity are increasing. For the finite radial sliding bearing, the pressure increases with the ratio of width to diameter. When the ratio of eccentricity and width is small, the bearing capacity of radial sliding bearing changes little with the thickness of the adsorption layer and the viscosity of the wall. With the increasing of eccentricity and width-diameter ratio, the change of bearing capacity becomes more and more obvious: the bearing capacity increases with the increase of eccentricity and width-diameter ratio, and the offset angle of radial sliding bearing decreases with the increase of eccentricity. When the eccentricity is small, the deviation angle does not change with the thickness of the adsorption layer and the viscosity of the wall, but with the increasing of the eccentricity, the deviation angle decreases with the increase of the eccentricity. The deviation angle of finite length radial sliding bearing has little change with the ratio of width to diameter. In this paper, the characteristics of water-base lubricated slider and radial sliding bearing are analyzed under the condition of film lubrication. It lays a solid theoretical foundation for the application of water-based lubricating fluid.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH117.22

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