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一、概述七十年代以来,随着汽轮机-发电机机组向多转子、大型化发展,输电线路向超高压、远距离演变,国外陆续发生了多起转子部套的异常损毁事故,引起了电力界的严重关注这些大多是叶片、联轴器和转轴等构件的损坏.经多方研究,逐步澄清了这些事故是与轴系扭振有密切关联的.目前,国外一些厂家已把扭振问题作为发展多转子大容量机组必须优先解决的项目之一,规定每一种新机组必须进行一台以上的电厂扭振实测.
I. Overview Since the 1970s, as steam turbine-generator units have developed into multi-rotors and large-scale, transmission lines have evolved to overhigh-pressure and long-range distances, there have been more and more abnormal damage accidents caused by rotor sets in foreign countries, causing electric power These sectors are mostly concerned about the damage of the blades, couplings and shafts, etc. After many studies, it is clarified gradually that these accidents are closely related to the torsional vibration of the shaft system.At present, some foreign manufacturers have taken the torsional vibration problem as the The development of multi-rotor high-capacity units must give priority to the project one of the provisions of each new unit must be more than one plant torsional vibration measured.