發(fā)布時(shí)間：2018-03-10 23:16

  本文選題：角接觸球軸承　切入點(diǎn)：彈流潤(rùn)滑　出處：《青島理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：良好的潤(rùn)滑是延長(zhǎng)軸承使用壽命的有效途徑之一，本文以建立的角接觸球軸承內(nèi)圈與滾動(dòng)體的幾何和潤(rùn)滑模型為研究對(duì)象，從理論上對(duì)角接觸球軸承正常工作下的潤(rùn)滑狀況、啟動(dòng)和制動(dòng)過(guò)程中的潤(rùn)滑機(jī)制、考慮固體顆粒的軸承潤(rùn)滑狀況進(jìn)行了分析考察。 建立了角接觸球軸承的彈流及時(shí)變熱混合潤(rùn)滑模型，運(yùn)用多重網(wǎng)格法求解Reynolds方程，用多重網(wǎng)格積分法求解膜厚方程中的彈性變形項(xiàng)，采用逐列掃描法求解能量方程，得到了角接觸球軸承的彈流潤(rùn)滑完全數(shù)值解。主要內(nèi)容包括： 首先，建立了角接觸球軸承的考慮自旋的等溫彈流潤(rùn)滑模型，得到了考慮自旋的角接觸球軸承的完全數(shù)值解；分析了考慮自旋時(shí)軸承不同節(jié)圓直徑下的壓力及膜厚變化，得到了較大速度及載荷范圍內(nèi)的油膜壓力及膜厚分布。 其次，建立了角接觸球軸承熱彈流潤(rùn)滑的數(shù)學(xué)模型，綜合考慮了軸承的幾何參數(shù)如密合度和節(jié)圓直徑等對(duì)軸承熱彈流潤(rùn)滑性能的影響，得到了不同轉(zhuǎn)速和載荷條件下角接觸球軸承的熱彈流潤(rùn)滑完全數(shù)值解。 第三，基于所建立的角接觸球軸承的熱彈流潤(rùn)滑模型，對(duì)考慮表面粗糙度的角接觸球軸承彈流潤(rùn)滑進(jìn)行了數(shù)值模擬，在缺乏實(shí)測(cè)數(shù)據(jù)的情況下采用了兩表面帶有余弦粗糙度的粗糙度函數(shù)模型，分析了表面形貌對(duì)軸承潤(rùn)滑性能的影響。 第四，建立了角接觸球軸承的時(shí)變熱混合潤(rùn)滑模型，討論了不同滑滾比下角接觸球軸承在啟動(dòng)和制動(dòng)過(guò)程中的壓力、膜厚及溫度變化，同時(shí)也分析了不同加速度對(duì)軸承啟動(dòng)中壓力、膜厚及溫度的影響。 第五，，考慮了軸承入口區(qū)的固體顆粒影響，建立了考慮固體顆粒的套圈-滾動(dòng)體接觸熱潤(rùn)滑模型，考察了顆粒對(duì)軸承熱彈流潤(rùn)滑狀況的影響，以及顆粒位置的影響。
[Abstract]:Good lubrication is one of the effective ways to prolong the service life of bearings. In this paper, the geometry and lubrication models of the inner ring and rolling body of angular contact ball bearings are taken as the research object, and the lubrication condition of diagonal contact ball bearings under normal operation is theoretically studied. The lubrication mechanism in the starting and braking process and the lubrication condition of the bearing considering solid particles are analyzed and investigated. The elastohydrodynamic and heat varying hybrid lubrication model of angular contact ball bearings is established. The Reynolds equation is solved by multi-grid method, the elastic deformation term in film thickness equation is solved by multi-grid integral method, and the energy equation is solved by row by row scanning method. The complete numerical solution of elastohydrodynamic lubrication for angular contact ball bearings is obtained. The main contents are as follows:. Firstly, the isothermal elastohydrodynamic lubrication model of angular contact ball bearing considering spin is established, and the complete numerical solution of angular contact ball bearing considering spin is obtained. The distribution of oil film pressure and film thickness in large speed and load range is obtained. Secondly, the mathematical model of thermo-elastohydrodynamic lubrication of angular contact ball bearing is established, and the influence of the geometric parameters of the bearing, such as the degree of compactness and the diameter of the nodal circle, on the performance of the thermo-elastohydrodynamic lubrication of the bearing is considered synthetically. A complete numerical solution of thermo-elastohydrodynamic lubrication for angular contact ball bearings under different rotational speeds and loads is obtained. Thirdly, based on the thermo-elastohydrodynamic lubrication model of angular contact ball bearing, the elastohydrodynamic lubrication of angular contact ball bearing considering surface roughness is numerically simulated. The roughness function model with cosine roughness on two surfaces is adopted in the absence of measured data, and the influence of surface morphology on lubrication performance of bearings is analyzed. In 4th, the time-varying heat mixed lubrication model of angular contact ball bearings was established. The pressure, film thickness and temperature of angular contact ball bearings with different slip ratios during start-up and braking were discussed. At the same time, the effects of different accelerations on the pressure, film thickness and temperature in bearing start-up are analyzed. In 5th, considering the influence of solid particles in the inlet region of bearing, the contact thermal lubrication model of ring-rolling body considering solid particles was established, and the influence of particle on the thermo-elastohydrodynamic lubrication of bearing and the influence of particle position on the thermal elastohydrodynamic lubrication of bearing were investigated.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TH117.2;TH133.3

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