凹槽型织构对钻头滑动轴承表面摩擦学性能影响分析  

Effects of Groove Texture on Tribological Performance of Sliding Bearing Surface of Drill Bit

作　　者：何霞[1] 杜文鑫 王国荣[1] 李梦媛[1] 钟林[1] 廖代胜 HE Xia;DU Wenxin;WANG Guorong;LI Mengyuan;ZHONG Lin;LIAO Daisheng(School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学机电工程学院,成都610500

出　　处：《机械科学与技术》2021年第1期1-8,共8页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51775463)。

摘　　要：基于雷诺方程建立表面织构化滑动轴承润滑理论模型,探究不同织构参数(分布角度、深度、面积比、偏斜角度、长度)对钻头滑动轴承承载力和摩擦因数的影响规律。在油膜收敛和最小油膜厚度附近区域布置织构,有利于增加轴承表面润滑性能,而织构布置在油膜发散处反而会减小轴承承载力,增大摩擦因数。织构的最佳织构深度与轴承的工况相关,不同偏心率条件下最优织构深度不同,轴承所承载的载荷越大,凹槽型织构化轴承的最佳织构深度越深;摩擦因数随织构面积比的增加先增大后减小,当面积比为18%时,摩擦因数最小。织构深度对织构偏斜角度的影响较小,轴承摩擦因数随偏斜角度的增加逐渐减小;织构长度为轴承宽度的1/2时,轴承润滑效果最佳。Based on Reynolds equation,a theoretical lubrication model of surface textured sliding bearings is established,and the effects of different texture parameters(distribution angle,depth,area ratio,deflection angle,length)on bearing capacity and friction coefficient of bit sliding bearings are investigated.Arrangement of texture near the convergence of oil film and the minimum oil film thickness is beneficial to increase the lubrication performance of the bearing surface,while arrangement of texture at the divergence of oil film will reduce the bearing capacity and increase the friction coefficient.The optimum texture depth is related to the working conditions of the bearing.Under different eccentricity conditions,the greater the load the bearing bears,the deeper the optimum texture depth of the grooved textured bearing.The friction coefficient increases first and then decreases with the increase of texture area ratio,and the friction coefficient is the smallest when the area ratio is 18%.The effect of texture depth on texture deflection angle is small,and the friction coefficient of bearing decreases with the increase of deflection angle.When the texture length is 1/2 of the width of bearing,the lubrication effect of bearing is the best.

关 键 词：表面织构 钻头 润滑减磨 表面磨损 摩擦因数 

分 类 号：TG156[金属学及工艺—热处理]