摘要
目前大型汽轮发电机组广泛采用了低压转子轴承座与低压外缸焊接为一体的结构形式,造成部分机组带负荷运行过程中低压缸轴承长期存在振动问题。通过结合低压缸的结构特点和运行参数对低压缸轴承振动故障进行分析,得出主要是由于转子质量不平衡偏大、低压缸整体刚度不足、低压缸轴承座支撑动刚度弱等原因所致。现场通过采用精细动平衡和低压缸缸体加固等措施,消除了机组低压缸轴承振动故障。消振经验和分析过程为同类型振动问题的分析和治理提供了指导。
The structural form of welding the low-pressure rotor bearing seat and low-pressure outer cylinder as a whole is widely used in large steam turbine generator units,which is causing some common vibration problems in the low-pressure cylinder rotor bearing system.The vibration fault characteristics of this type were diagnosed by combining the structural characteristics of the low-pressure cylinder bearing system and operating parameters.It has been clarified that the cause of vibration is due to unbalanced rotor mass,low overall stiffness of low-pressure cylinder,weak dynamic stiffness of low-pressure cylinder bearing seat support.On site measures such as fine dynamic balancing and reinforcement of low-pressure cylinder body can be taken to eliminate the vibration fault of the low-pressure cylinder of this type of unit.These measures have been successfully applied in engineering practice,which provide guidance for the analysis and treatment of similar vibration problems.
作者
殷戈
何新荣
雒兴刚
YIN Ge;HE Xin-rong;LUO Xing-gang(Guoneng Nanjing Electric Power Test&Research Limited,Nanjing 210046,China;Harbin Turbine Company Limited,Harbin 150046,China)
出处
《汽轮机技术》
北大核心
2024年第1期63-66,24,共5页
Turbine Technology
关键词
座缸式轴承
激振力
刚度
动平衡
有限元分析
seat cylinder bearing
excitation force
rigidity
dynamic balance
finite element analysis
