本文選題：滑動(dòng)軸承 + 表面織構(gòu)　； 參考：《河南科技大學(xué)》2017年碩士論文

【摘要】：滑動(dòng)軸承是支撐軸類零件并使承載面間能作相對滑動(dòng)的重要機(jī)械元件�；瑒�(dòng)軸承的摩擦磨損是影響軸承壽命、軸承工作效率的重要因素。表面織構(gòu)技術(shù)對降低缸套、活塞環(huán)、軸承和刀具等接觸潤滑表面的摩擦、磨損效果顯著。但目前針對滑動(dòng)軸承內(nèi)圓表面微圓凹坑織構(gòu)對軸承摩擦潤滑特性的研究甚少。基于理論分析和試驗(yàn)驗(yàn)證,本文對圓形微凹坑織構(gòu)動(dòng)壓滑動(dòng)軸承的摩擦潤滑性能展開深入研究,為圓形微凹坑織構(gòu)動(dòng)壓滑動(dòng)軸承的應(yīng)用和優(yōu)化設(shè)計(jì)奠定新的理論基礎(chǔ)。根據(jù)流體動(dòng)壓潤滑機(jī)理,建立含有圓形微凹坑織構(gòu)的動(dòng)壓滑動(dòng)軸承數(shù)學(xué)模型。推導(dǎo)圓形微凹坑織構(gòu)動(dòng)壓滑動(dòng)軸承油膜厚度方程;討論二維Reynolds方程的應(yīng)用和邊界條件;對偏微分方程和求解區(qū)域網(wǎng)格進(jìn)行離散化處理;采用有限差分法和松弛迭代法求解Reynolds方程。以上述理論為基礎(chǔ)對圓形微凹坑織構(gòu)動(dòng)壓滑動(dòng)軸承模型進(jìn)行數(shù)值解析�；贛ATALB平臺(tái),設(shè)計(jì)織構(gòu)化動(dòng)壓滑動(dòng)軸承油膜壓力,承載力和摩擦力的求解程序;辨明圓形微凹坑織構(gòu)軸承油膜厚度、壓力分布形式和原理;探究織構(gòu)分布位置,織構(gòu)間距,織構(gòu)深度及其排布形式等對動(dòng)壓潤滑軸承油膜壓力分布,承載力及運(yùn)轉(zhuǎn)摩擦力的影響規(guī)律。研究表明,織構(gòu)在升壓區(qū)時(shí),動(dòng)壓滑動(dòng)軸承能取得較好的減摩增潤效果;織構(gòu)深度為5~15μm時(shí),軸承壓力分布更優(yōu);軸承最大可以減小8.1%的摩擦力;織構(gòu)間距為200μm,深度為8μm,織構(gòu)交叉排布時(shí),軸承的綜合承載、減摩潤滑性能最優(yōu)。最后,對圓形微凹坑織構(gòu)動(dòng)壓滑動(dòng)軸承進(jìn)行摩擦試驗(yàn)研究。選擇黃銅和軸承鋼兩種材料,采用激光加工方法分別制備6種不同參數(shù)的圓形微凹坑織構(gòu)試件;在M-2000型摩擦磨損試驗(yàn)機(jī)上進(jìn)行摩擦磨損試驗(yàn);分析不同織構(gòu)試件的減摩潤滑效果。試驗(yàn)表明,對于確定的工況,多個(gè)織構(gòu)單元試件的減摩效果優(yōu)于單個(gè)織構(gòu)單元試件;相同織構(gòu)尺寸和數(shù)量組成的不同織構(gòu)排列形式對試件的減摩潤滑效果也不同。
[Abstract]:Sliding bearing is an important mechanical element that supports shaft parts and can make relative sliding between the bearing surface. The friction and wear of the sliding bearing is an important factor affecting the life of the bearing and the working efficiency of the bearing. The surface texture technology is very effective in reducing the friction of the contact lubrication surface of the cylinder liner, piston ring, bearing and cutting tool. On the basis of theoretical analysis and test verification, the frictional lubrication performance of circular micro pits is deeply studied, and a new theoretical basis is laid for the application and optimization of circular micro pits texture dynamic bearing. Based on the hydrodynamic lubrication mechanism, a mathematical model of dynamic pressure sliding bearing containing circular micro pits is established. The oil film thickness equation of the circular micro pits is derived. The application and boundary conditions of the two-dimensional Reynolds equation are discussed; the partial differential equation and the solution of the regional grid are discretized; the finite difference method and the finite difference method are used. The Reynolds equation is solved by the relaxation iterative method. Based on the above theory, the dynamic pressure sliding bearing model of circular micro pits is numerically analyzed. Based on the MATALB platform, the solution program for the oil film pressure, bearing capacity and friction of the textured dynamic pressure sliding bearing is designed, and the oil film thickness, the pressure distribution form and the original form of the circular micro pit texture bearing are identified. The influence of texture distribution position, texture spacing, texture depth and arrangement form on the oil film pressure distribution, bearing capacity and running friction force of dynamic pressure lubricated bearings is investigated. The study shows that the dynamic pressure sliding bearing can achieve better Mo Zengrun effect when the texture is in the rising area; the pressure distribution of the bearing is better when the texture depth is 5~15 u. The maximum of the bearing can be reduced by 8.1% of the friction force; the spacing of the texture is 200 m, the depth is 8 mu m. When the texture is crossed, the bearing's comprehensive bearing and the friction reducing performance are optimal. Finally, the friction test of the circular micro dent texture dynamic sliding bearing is studied. Two materials of brass and bearing steel are selected and 6 kinds of laser processing methods are used to prepare 6 kinds of materials respectively. The circular micro pits of different parameters are used to test the texture of the micropits; the friction and wear tests of the M-2000 friction and wear tester are carried out. The friction reducing effect of different textured specimens is analyzed. The test shows that the friction reducing effect of several textured elements is better than the single texture single piece for the determined condition. The effect of texture arrangement on friction and lubrication of specimens is also different.

【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH133.31

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本文編號(hào)：1804558