【摘要】 以某6 m盾构机实际工况及其主驱动轴承为研究对象，建立主驱动轴承载荷分布模型及等温弹流润滑模型，得到了各工况下的负载受力，分析了几何修形对盾构机主轴承弹流润滑的影响。结果表明：从弹流润滑角度判断，滚子母线凸度及端部圆角半径均存在优化区间，从而使最大滚子负载处的油膜压力显著减小，减小边缘效应；几何修形后的滚子明显比直母线滚子的润滑性能要好，且修形后的滚子在工况变化时，存在自适应性，但极限工况下仍存在油膜压力过大和油膜厚度偏低的情况。因此当极限工况时间占比较大时，应适当增加滚子凸度。综上可知，合理选取几何修形滚子参数可显著提高盾构机主驱动轴承润滑性能。更多还原

【Abstract】 The load distribution model and isothermal elastic flow lubrication model of the main drive bearing were established based on the actual working conditions of a 6 m shield machine and its main drive bearing, and the load forces under each working condition were obtained, and the influence of geometric modification on the elastic flow lubrication of the shield machine main bearing was analyzed.The results show that judging from the perspective of elastic lubrication, there is an optimization interval in the convex metric of the roller busbar and the radius of the end part corner, which significantly reduces the oil film pressure at the maximum roller load and reduces the edge effect.Geometrically modified rollers have significantly better lubricating properties than straight busbar rollers.Moreover, the modified roller is self-adaptability when the working conditions change, but there is still excessive oil film pressure and low oil film thickness under the limit working conditions.So when the limit working time accounts for a relatively large proportion, the roller convex metric should be appropriately increased.In summary, it can be seen that the lubrication performance of the main drive bearing of the shield machine can be significantly improved by reasonably selecting the geometrically modified roller parameters.更多还原