柔性转子转轴弯曲与不平衡耦合振动分析

发布时间：2018-05-07 00:07

本文选题：柔性转子 + 弯曲变形　；参考：《动力工程学报》2016年11期

【摘要】：针对某660 MW超临界汽轮机高中压转子上发生的不稳定振动问题,建立了转子弯曲与不平衡耦合动力响应有限元计算模型,并通过现场实例验证模型的准确性.结果表明:高转速运行时,汽轮机高压转子因配重面与失衡面不重合所引起的弯曲变形会导致振动的不稳定和持续爬升;动平衡试验应尽量在转子失衡面上进行;高压转子环境温度高,在外力作用下易发生蠕变,该现象在大型汽轮机高压转子上表现得更为明显.
[Abstract]:In view of the unstable vibration of a 660MW supercritical steam turbine rotor under high pressure, a finite element model for the coupled dynamic response of the rotor with bending and unbalance is established, and the accuracy of the model is verified by an example in the field. The results show that the bending deformation of the high pressure turbine rotor caused by the non-coincidence of the counterweight surface and the unbalanced surface will lead to the instability of vibration and the continuous climb of the rotor, and the dynamic balance test should be carried out on the unbalanced surface of the rotor as much as possible. The high pressure rotor is easy to creep under the action of external force because of its high ambient temperature. This phenomenon is more obvious on the high pressure rotor of large steam turbine.
【作者单位】：东南大学火电机组振动国家工程研究中心;华北电力科学研究院有限责任公司;
【分类号】：TM621

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