摘要
为解决轴流风机结构共振问题,通过结构共振机理分析,得出了引发结构共振的必要条件,并根据轴流风机结构特征分析了其主要振源部件和常见故障频率范围,进而提出了四项治理结构共振的措施:提高结构刚度、改变激振力频率、降低激振力和增加阻尼,并讨论了各处理措施的适用性及优劣。结合某1000 MW机组双级轴流引风机案例,综合采用提高支撑刚度和降低激振力的方法使结构共振问题得到了彻底解决。
In order to solve the structural resonance problem of axial flow fans,the necessary conditions for structural resonance through structural resonance mechanism analysis is obtained,and analyzed the main vibration source components and common fault frequency ranges through the structural characteristics of axial flow fans,and then proposed four measures to control structural resonance:improve structural rigidity,change the frequency of excitation force,reduce excitation force and increase damping,and discuss the applicability and advantages of each treatment measure.Combined with the case of a 1000 MW unit two-stage axial flow induced draft fan,the method of improving the support stiffness and reducing the excitation force was adopted to completely solve the structural resonance problem.The research results and governance experience can provide a reference for the analysis and treatment of resonance problems of similar equipment.
作者
庞乐
王波
邴汉昆
PANG Le;WANG Bo;BING Han-kun(Huadian Electric Power Research Institute Co.,Ltd.;Huadian Ningxia Lingwu Power Generation Co.,Ltd.)
出处
《电站系统工程》
2022年第1期29-32,共4页
Power System Engineering
关键词
火电厂
轴流风机
共振
结构刚度
固有频率
激振力
thermal power plant
axial fan
resonance
structural rigidity
natural frequency
exciting force
