1000 MW二次再热汽轮机超长单支撑轴系振动问题分析与处理  

Analysis and Treatment of Vibration of 1000 MW Secondary Reheat Steam Turbine Super-long Single Support Shaft System

作　　者：李明成 鲁希振 李立波 LI Ming-cheng;LU Xi-zhen;LI Li-bo(Datang Dongying Power Generation Co.,Ltd.,Dongying 257000,China;Datang Northeast Electric Power Test Research Institute,Changchun 130012,China)

机构地区：[1]大唐东营发电有限公司,山东东营257000 [2]大唐东北电力试验研究院有限公司,吉林长春130012

出　　处：《节能技术》2022年第3期263-266,共4页Energy Conservation Technology

摘　　要：在新能源并网的背景下,火电机组逐渐向大型化、长轴化的方向发展。然而长轴系由于其存在静挠度,使得安装过程中转子呈现扬度曲线的形态,这对转子运行过程中的振动稳定性带来了巨大的挑战。此外,我国新百万机组轴系逐渐以单支撑作为主要支撑形式,在处理振动超限的方法上无法直接套用双支撑的处理方案,同时国内鲜有成熟且成套的技术方案可供参考。对此,本文针对某厂2号59.9 m超长轴系机组调试期间出现的发电机振动问题,对振动数据和频谱进行了分析,发现振动原因是由于发电机转子带负荷后产生的热态不平衡。最后,设计了针对性的平衡配重方案并现场实施后,发电机轴承振动达到了优秀水平。本文填补了国内百万等级机组超长单支撑轴系振动处理的空缺,为火电机组的大型化、长轴化奠定基础。In the context of new energy grid integration,thermal power units are gradually developing in the direction of large-scale and long-axis.However,due to the static deflection of the long shaft system,the rotor exhibits the shape of a lift curve during the installation process,which brings a huge challenge to the vibration stability of the rotor during operation.In addition,the shaft system of my country's new million units is gradually using single support as the main support form,and it is impossible to directly apply the dual support solution to the method of dealing with vibration exceeding limits.At the same time,there are few mature and complete sets of technical solutions for reference in China.In this regard,this article analyzes the vibration data and frequency spectrum of the generator vibration problem that occurred during the commissioning of the No.259.9 m ultra-long shafting unit of a factory,and found that the cause of the vibration is due to the thermal state of the generator rotor under load.balance.Finally,after designing a targeted counterweight plan and implementing it on site,the generator bearing vibration reached an excellent level.This paper fills up the vacancy in the vibration treatment of the ultra-long single-support shafting of domestic million-level units,and lays the foundation for the large-scale and long-shaftization of thermal power units.

关 键 词：百万级汽轮机 二次再热 转子动平衡 单支撑轴系 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]