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为了满足汽轮机对滑动轴承稳定性的高要求,利用Ansys软件分析椭圆滑动轴承油膜厚度对汽轮机振动的影响.首先将UG软件建立的物理模型导入icem软件中进行网格划分,再利用Ansys中CFX模块计算不同油膜厚度下椭圆滑动轴承的油膜压力分布,在Mechanical模块中,分析不同油膜厚度下的油膜特性及其对轴承振动幅值的影响,以实现在Ansys中多物理场的耦合分析.结果表明:汽轮机运行中存在合理区域的油膜厚度,使得汽轮机的振动幅值在允许值内;在相同条件下,椭圆滑动轴承比圆柱轴承的稳定性更好.
In order to meet the high turbine stability requirements for plain bearings, Ansys software was used to analyze the effect of oval sliding bearing film thickness on turbine vibration.Firstly, the physical model established by UG software was imported into icem software for meshing, and the Ansys CFX module Oil film pressure distribution of elliptical plain bearings under different oil film thicknesses was calculated. In the Mechanical module, the oil film characteristics under different oil film thickness and its influence on bearing vibration amplitude were analyzed in order to realize the coupling analysis of multiphysics in Ansys. : There is a reasonable area of oil film thickness in turbine operation, making the turbine vibration amplitude within the allowable value; under the same conditions, the stability of elliptical plain bearings than cylindrical bearings better.