【摘要】：在流體潤(rùn)滑狀態(tài)下,適當(dāng)?shù)谋砻婵棙?gòu)可強(qiáng)化動(dòng)壓潤(rùn)滑性能,可以起到減摩潤(rùn)滑的作用,這是許多中外學(xué)者的普遍認(rèn)識(shí),但是在織構(gòu)結(jié)構(gòu)參數(shù)對(duì)潤(rùn)滑性能的影響方面仍然存在許多需要深入研究的問(wèn)題。本文主要探討在流體潤(rùn)滑狀態(tài)下,表面織構(gòu)結(jié)構(gòu)參數(shù)與雷諾數(shù)對(duì)潤(rùn)滑性能的影響規(guī)律,研究結(jié)果對(duì)于摩擦副表面織構(gòu)的設(shè)計(jì)具有借鑒意義。 本文以兩平行平面間的矩形截面織構(gòu)為研究對(duì)象,建立了無(wú)量綱表面織構(gòu)CFD分析模型；采用基于N-S方程的FLUENT軟件對(duì)所建立的模型進(jìn)行求解,得到流域內(nèi)的流體流線分布情況、織構(gòu)表面的壓力分布曲線以及表面作用力。通過(guò)對(duì)不同織構(gòu)結(jié)構(gòu)參數(shù)與雷諾數(shù)下織構(gòu)模型的求解結(jié)果進(jìn)行分析比較發(fā)現(xiàn)：織構(gòu)可以改變織構(gòu)表面的壓力分布,影響承載力；當(dāng)雷諾數(shù)與織構(gòu)寬度一定時(shí),流域內(nèi)存在一個(gè)出現(xiàn)渦流的織構(gòu)深度臨界值,即最佳織構(gòu)深度,此時(shí)織構(gòu)表面的動(dòng)壓潤(rùn)滑性能最優(yōu),對(duì)于矩形截面織構(gòu),無(wú)量綱最佳織構(gòu)深度取值范圍為0.4-0.6。 在對(duì)矩形截面織構(gòu)進(jìn)行研究的基礎(chǔ)上,本文對(duì)截面形狀為圓弧、梯形、等腰三角形以及直角三角形(A、B)的另外六種織構(gòu)進(jìn)行了分析,并對(duì)以上七種織構(gòu)的動(dòng)壓潤(rùn)滑性能進(jìn)行比較后發(fā)現(xiàn)：織構(gòu)截面形狀會(huì)影響織構(gòu)表面的動(dòng)壓潤(rùn)滑性能；當(dāng)雷諾數(shù)與織構(gòu)寬度一定時(shí),無(wú)量綱深度d*為0.6的收斂直角三角形A織構(gòu)具有最佳的動(dòng)壓潤(rùn)滑性能。 基于織構(gòu)表面動(dòng)壓潤(rùn)滑性能分析結(jié)果,對(duì)織構(gòu)在推力滑動(dòng)軸承中的應(yīng)用進(jìn)行了初步的研究,針對(duì)標(biāo)準(zhǔn)斜-平面推力軸承,應(yīng)用CFD數(shù)值模型方法求解的結(jié)果與解析法求解結(jié)果相一致,證明了CFD數(shù)值模型的適用性；利用該模型對(duì)斜-平面推力軸承的承載力研究發(fā)現(xiàn)：由于織構(gòu)的存在,軸承的承載能力比光滑表面有所提高；軸承承載能力的提高主要是由瓦塊表面最大壓力位置到收斂端上的織構(gòu)引起的。
[Abstract]:Under the condition of fluid lubrication, proper surface texture can enhance the hydrodynamic lubrication performance and play the role of friction-reducing lubrication, which is widely recognized by many scholars at home and abroad. However, there are still many problems about the influence of texture parameters on lubrication performance. In this paper, the effects of surface texture parameters and Reynolds number on the lubrication performance under the condition of fluid lubrication are discussed. The results are useful for the design of surface texture of friction pairs. This paper takes the texture of rectangular section between two parallel planes as the research object, establishes the dimensionless surface texture CFD analysis model, uses the FLUENT software based on N-S equation to solve the established model, and obtains the fluid streamline distribution in the basin. The pressure distribution curve and the surface force on the texture surface. By analyzing and comparing the solution results of texture model with different texture parameters and Reynolds number, it is found that texture can change the pressure distribution of texture surface and affect the bearing capacity, and when Reynolds number and texture width are fixed, There is a critical value of texture depth with eddy current in the basin, that is, the optimum texture depth, in which the hydrodynamic lubrication performance of the texture surface is optimal, and the dimensionless optimum texture depth ranges from 0.4-0.6 for the rectangular cross-section texture. On the basis of studying the texture of rectangular section, the other six kinds of texture with circular arc, trapezoid shape, isosceles triangle and right angle triangle (AZB) are analyzed in this paper. After comparing the hydrodynamic lubrication properties of the seven textures, it is found that the shape of texture cross section will affect the hydrodynamic lubrication performance of texture surface, and when the Reynolds number and texture width are fixed, The convergent right triangle A texture with dimensionless depth d * 0.6 has the best hydrodynamic lubrication performance. Based on the results of dynamic lubrication analysis on the surface of texture, the application of texture in thrust plain bearing is studied preliminarily, aiming at the standard oblique plane thrust bearing. The results obtained by using the CFD numerical model method are consistent with those obtained by the analytical method, which proves the applicability of the CFD numerical model, and studies the bearing capacity of the oblique plane thrust bearing by using the model. The bearing capacity of the bearing is higher than that of the smooth surface, and the increase of bearing load capacity is mainly caused by the texture from the maximum pressure position of the tile surface to the convergent end.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH117.2;TH133.3

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