圆柱滚子轴承织构化内圈挡边摩擦特性分析  

Analysis of the tribological effect of texture on the inner ring back face rib of cylindrical roller bearing

作　　者：刘红彬[1] 史永生[1] 王海洋[1] 刘公平[1] LIU Hong-bin SHI Yong-sheng WANG Hai-yang LIU Gong-ping(School of Mechatronies Engineering, Henan University of Science and Technology, Luoyang 471003)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《机械设计》2017年第9期32-38,共7页Journal of Machine Design

基　　金：国家自然科学基金-联合基金资助项目(U1404517);清华大学摩擦学国家重点实验室开放基金资助项目(SKLTKF13A03)

摘　　要：将表面织构应用到圆柱滚子轴承内圈挡边,建立了织构化内圈挡边-滚子端面油膜润滑的数学模型。计算分析了微凹坑对套圈挡边-滚子端面油膜压力分布的影响,分析了微凹坑参数和工况条件对摩擦因数的影响规律;试验研究了在不同载荷作用下微凹坑面积率、凹坑深度和直径对轴承温升的影响。结果表明:圆柱形微凹坑可明显改善套圈挡边-滚子端面的油膜压力分布;在不同载荷下均存在最优凹坑面积率、最优凹坑直径及深度,且随着载荷增大,直径较大组织构表现出更优的减摩性能。与无织构组相比,当轴向载荷为40 N,内圈挡边分布直径为0.3 mm,深度为1.0μm,面积率为18%的圆柱形微凹坑时,轴承挡边最高温升降幅可达46.8%。The surface texture is applied to the inner ring of the cylindrical roller bearing, and the numerical model of textured surface with cylindrical micro-dents on the inner ring back face rib of cylindrical roller bearing is established. The influence of micro-dents to pressure distribution and friction coefficient was analyzed, and the effect of load to friction coefficient was analyzed too. The temperature rise has been observed under the different load with various area ratios and dimensions of the micro-dents through the temperature rise test. The results show that these cylindrical micro-dents can significantly alter the pressure distribution. There are diverse optimal parameters of micro-dents under the different load. As the load increased, the surface with larger dimples presents lower friction coefficients. Compared with the no texture specimen, when the axial load is 40 N,the specimen′s maximum temperature drop up to 46.8%, which has the texture with a dimple diameter of 0.3 mm, a dimple depth of 1 μm, and a dimple area ratio of 18% on the inner ring back rib.

关 键 词：圆柱滚子轴承 表面织构 内圈挡边 摩擦因数 挡边温升 

分 类 号：TH117.3[机械工程—机械设计及理论]