Research on Vibration Fault of Low Pressure Cylinder Bearings for Steam Turbine Generator Units
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.
seat cylinder bearingexcitation forcerigiditydynamic balancefinite element analysis
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维普
