本文選題：彈流潤(rùn)滑　切入點(diǎn)：多重網(wǎng)格法　出處：《大連海事大學(xué)》2015年碩士論文

【摘要】：表面微織構(gòu)可以改善摩擦副表面的摩擦學(xué)性能。為了系統(tǒng)全面的研究微織構(gòu)表面的彈流潤(rùn)滑性能和減摩機(jī)理,本文建立點(diǎn)狀、線狀和網(wǎng)狀表面微織構(gòu)的數(shù)學(xué)模型來探討摩擦因數(shù)隨微織構(gòu)表面形貌參數(shù)的變化規(guī)律。研究的微織構(gòu)表面形貌參數(shù)主要有：表面微織構(gòu)的深度、面積占有率、分布方式�；趶椓鳚�(rùn)滑理論,通過Reynolds方程、膜厚方程、載荷平衡方程、黏壓方程和密壓方程建立三種微織構(gòu)表面的彈流潤(rùn)滑模型,采用多重網(wǎng)格法進(jìn)行求解,最后得到三種微織構(gòu)表面在不同形貌參數(shù)下的摩擦因數(shù),壓力和油膜厚度分布。通過分析得出以下結(jié)論：對(duì)點(diǎn)狀表面微織構(gòu)的研究中發(fā)現(xiàn)：摩擦因數(shù)隨微凹坑深度、面積占有率和排數(shù)的增加均是先減小后增大,并在微凹坑深度為2μm,面積占有率為18%,排數(shù)為7時(shí),摩擦因數(shù)最��；微凹坑呈鈍角型分布的摩擦因數(shù)較直線型和銳角型的小。對(duì)線狀表面微織構(gòu)的研究中發(fā)現(xiàn)：摩擦因數(shù)隨微凹槽深度、面積占有率和排數(shù)的增加均是先減小后增大,并在微凹槽深度為6μm,面積占有率為40%,排數(shù)為5時(shí),摩擦因數(shù)最小；微凹槽與滑動(dòng)方向?yàn)?50°的摩擦因數(shù)較其它角度的小。對(duì)網(wǎng)狀表面微織構(gòu)的研究中發(fā)現(xiàn)：摩擦因數(shù)隨微凹槽深度、面積占有率和排數(shù)的增加均是先減小后增大,并在微凹槽深度為4μm,面積占有率為40%,排數(shù)為5時(shí),摩擦因數(shù)最小；微凹槽間夾角為150°的摩擦因數(shù)較其他角度的小。對(duì)三種微織構(gòu)表面的對(duì)比研究中發(fā)現(xiàn)：其他工況條件不變,只改變速度時(shí),當(dāng)速度小于4.3m/s時(shí),網(wǎng)狀微織構(gòu)表面的摩擦因數(shù)最��；當(dāng)速度大于4.3m/s時(shí),點(diǎn)狀微織構(gòu)表面的摩擦因數(shù)最小。其他工況條件不變,只改變載荷時(shí),當(dāng)載荷小于18N時(shí),網(wǎng)狀微織構(gòu)表面的摩擦因數(shù)最��；當(dāng)載荷大于18N時(shí),點(diǎn)狀微織構(gòu)表面的摩擦因數(shù)最小。
[Abstract]:Surface microtexture can improve the tribological properties of friction pairs. The mathematical models of linear and reticular surface microtextures are used to study the variation of friction coefficient with the surface topography parameters of microtextures. The main parameters of the microtextures are: the depth of surface microtextures, the occupation of area, and the variation of friction coefficient. Based on EHL theory, the elastohydrodynamic lubrication models of three kinds of microtextured surfaces were established by Reynolds equation, film thickness equation, load balance equation, visco-pressure equation and dense pressure equation. Finally, the friction coefficient, pressure and oil film thickness distribution of three kinds of microtextured surfaces under different morphologic parameters are obtained. The following conclusions are drawn: in the study of microtexture on the point surface, it is found that the friction coefficient varies with the depth of the microcrater. The increase of area occupation rate and row number is first decreasing and then increasing, and the friction coefficient is the smallest at the depth of the microcrater 2 渭 m, the area occupation rate 18, the row number 7; The friction coefficient of the microcrater with obtuse angle distribution is smaller than that of the linear and acutely angled surface microtextures. It is found that the friction coefficient decreases first and then increases with the increase of the depth of the microgroove, the area occupation and the number of rows, and then increases with the increase of the depth of the microgroove, the area occupation and the number of rows. The friction coefficient is the smallest when the depth of the microgroove is 6 渭 m, the area occupation rate is 40 渭 m, the number of rows is 5, and the friction coefficient is the lowest. The friction coefficient of microgroove and sliding direction 150 擄is smaller than that of other angles. It is found that the friction coefficient decreases first and then increases with the increase of microgroove depth, area occupation and number of rows. The friction coefficient is the smallest when the depth of the microgroove is 4 渭 m, the area occupied is 40 渭 m, the number of rows is 5, and the friction coefficient is smaller when the angle between the microgrooves is 150 擄. When the velocity is only changed, when the velocity is less than 4.3m/s, the friction coefficient of the reticulated microtexture surface is the smallest, and when the velocity is greater than 4.3m/s, the friction coefficient of the point microtexture surface is the smallest. When the other working conditions are unchanged, the load is changed only, and when the load is less than 18N, The friction coefficient of the reticular microtexture surface is the smallest, and the point microtexture surface is the smallest when the load is greater than 18N.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U464;TB303

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本文編號(hào)：1694110