本文選題：滾動軸承　切入點：激光微織構(gòu)　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：滾動軸承滾道表面形貌對軸承的摩擦、潤滑、抗疲勞及壽命影響顯著,合理的表面形貌設(shè)計能夠改善軸承的性能。為了研究滾子—滾道接觸界面表面微觀形貌對軸承性能的影響,建立滾道表面三維形貌參數(shù)與軸承性能之間的相關(guān)性,本文基于激光微加工技術(shù),對6010深溝球軸承內(nèi)圈滾道表面進行設(shè)計,通過控制微織構(gòu)的形狀、深度、面積占有率等參數(shù),制備了六組不同的織構(gòu),繼而使用Talysulf CCI Lite非接觸式三維光學(xué)形貌儀對加工后的滾道表面進行測量和表征。由于軸承處于彈流潤滑狀態(tài),接觸界面不可避免會發(fā)生彈性變形,而接觸界面微觀形貌的變形勢必會對彈流潤滑情況造成很大影響,因此有必要將真實的表面微觀形貌引入彈流潤滑計算,以此預(yù)測接觸界面在工作過程中的表面形貌和潤滑狀況�；趶椓鳚櫥焖偎惴ā狝mplitude Reduction以及快速傅立葉變換,對彈性變形后的滾道表面進行重構(gòu),分析對比表面三維形貌圖、二維粗糙度、頻譜圖以及三維形貌參數(shù)的變化。最后利用航空發(fā)動機主軸軸承試驗機,初步探究了滾道表面微織構(gòu)特征對軸承性能的影響。本研究結(jié)果表明:微織構(gòu)特征顯著降低滾道表面的承載能力,且織構(gòu)參數(shù)的選定對磨損后的軸承滾道表面形貌也有顯著影響。彈流潤滑下滾道微織構(gòu)表面將發(fā)生彈性變形,表面形貌趨于平坦,微凹坑深度變淺,微凹坑邊緣高度略微升高;表面粗糙度中的低頻成分將在彈性變形過程中比高頻成分發(fā)生更明顯的變形,且不同微織構(gòu)表面具有差別較大的幅頻特性;彈流潤滑狀態(tài)下表面形貌高度、空間和功能參數(shù)隨彈性變形均發(fā)生了明顯的變化,且與表面原始形貌存在一定的關(guān)聯(lián),因此評判軸承滾道表面性能時要綜合考慮彈性變形對各形貌參數(shù)的影響,否則會導(dǎo)致分析片面,不利于后續(xù)的滾道表面形貌設(shè)計工作。
[Abstract]:The surface morphology of roller bearing raceway has a significant effect on friction, lubrication, fatigue resistance and life of bearing. Reasonable design of surface topography can improve the performance of bearing. In order to study the influence of micro-morphology of roller-raceway contact interface on bearing performance, the correlation between 3D profile parameters of raceway surface and bearing performance is established. In this paper, the surface of inner ring raceway of 6010 deep groove ball bearing is designed based on laser micromachining technology. By controlling the shape, depth, area occupancy and other parameters of microtexture, six groups of different textures are prepared. Then the surface of the machined raceway was measured and characterized by Talysulf CCI Lite non-contact three-dimensional optical profilometer. Due to the elastohydrodynamic lubrication of the bearing, the contact interface will inevitably undergo elastic deformation. However, the deformation of contact interface microtopography will have a great influence on EHL, so it is necessary to introduce the true surface morphology into EHL calculation. Based on the EHL fast algorithm -Amplitude Reduction and Fast Fourier transform (FFT), the surface of the raceway after elastic deformation is reconstructed, and the 3D topography of the raceway is analyzed and compared. The change of two-dimensional roughness, spectrum chart and three-dimensional topography parameters. Finally, using the aeroengine spindle bearing testing machine, The effect of microtexture characteristics on bearing performance is preliminarily investigated. The results show that the bearing capacity of the raceway surface is significantly reduced by the microtexture characteristics. And the selection of texture parameters also has a significant effect on the surface morphology of the bearing raceway after wear. Elastic deformation will occur on the micro-texture surface of the raceway under elastohydrodynamic lubrication, the surface morphology tends to flatten, the depth of the micro-pit becomes shallow, and the height of the edge of the micro-crater increases slightly. The low frequency component in the surface roughness will deform more obviously than the high frequency component in the elastic deformation process, and the surface of different microtexture has different amplitude-frequency characteristic, and the surface morphology is high under elastohydrodynamic lubrication. The space and function parameters change obviously with the elastic deformation and have some relation with the original surface morphology. Therefore, the influence of elastic deformation on the surface parameters of the bearing raceway should be considered synthetically when evaluating the surface properties of the bearing raceway. Otherwise, it will lead to one-sided analysis, which is not conducive to the subsequent raceway surface topography design.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH133.3

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