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首次尝试确定具有11个液膜动力轴承的115万kW超大型核电站透平发电机转子系统的静挠度、轴应力和支承反力的分布.使用有限元方法对该系统建立计算模型,计算和分析了轴承竖向对中状态的变化对支承反力和轴应力分布的影响.在正常运行速度和一定范围的轴承载荷下,计算了诸液膜轴承的刚度和阻尼系数以及液膜压力分布,并计及基础柔性.根据测量到的运行速度下诸轴承塞油孔动压力,预测和估算支承反力的分布,为动力分析打下基础.
The first attempt was made to determine the distribution of static deflection, axial stress and bearing reaction of a turbo-generator rotor system with 11 million kW super-large nuclear power plants. The finite element method is used to establish the calculation model of the system. The influence of the vertical alignment of the bearing on the bearing reaction force and axial stress distribution is calculated and analyzed. Under normal operating speed and a range of bearing loads, the stiffness and damping coefficients of the liquid film bearings and the pressure distribution of the liquid film were calculated, and the basic flexibility was taken into account. According to the measured dynamic pressure of the oil in the bearing, the predicted and estimated distribution of the bearing reaction force lay the foundation for the dynamic analysis.