2.3.3 Turbogenerator Torsional Vibration

Torsional vibration refers to the imbalance between mechanical torque and electromagnetic torque caused by disturbances during the normal operation of steam turbine generator sets. This imbalance leads to torsional vibration of the turbine shaft system, which is easy to cause shaft fatigue. In order to reduce the impact of generator rotor torsional vibration on the unit and enable large generator sets to operate safely and stably, it is of great significance to calculate the torsional vibration of large generator rotors and evaluate their fatigue life. The torsional vibration of turbine generator rotors must be designed and verified. The main research methods include Riccati transfer matrix method, Proh1 transfer matrix method and finite element method.

3 Conclusion

my country's power industry is in the development mode of large units and large power grids. In order to effectively improve the operating efficiency of generators, the stability and reliability of generator operation should be gradually improved, and the utilization rate of equipment should be improved. The rotor of a large full-speed steam turbine generator is a high-speed rotating and energized structural part. During the design, the safety of the generator rotor can be effectively improved by comprehensively calculating and analyzing the rotor electromagnetic, insulation, cooling, temperature rise, mechanical strength, vibration and torsional vibration. This paper discusses the rotor design elements and provides a reference for the design of large full-speed steam turbine generator rotors in the future.