一、前言随着生产的迅速发展,挠性转子越来越广泛地采用。仅以大型汽轮机发电机转子而言,由于装机容量的增加,加大转子的直径受到材料和结构的限制,被迫使转子加长,转子细长又重,柔性增加,转子的临界转速就大大下降,工作转速处于第一阶临界转速或第二阶临界转速以上运行。表1列出各种国产汽轮发电机转子的有关尺寸,重量及其临界转速的数值。 I. Preface With the rapid development of production, the flexible rotor is more and more widely used. Only for large steam turbine generator rotor, due to the increase of installed capacity, increasing the diameter of the rotor by the material and structure constraints, forced to make the rotor lengthened, the rotor slender and heavy, increased flexibility, the critical speed of the rotor is greatly reduced, The working speed is at the first critical speed or above the second critical speed. Table 1 lists a variety of domestic turbine rotor size, weight and critical speed values.