Study on Vibration Characteristics of Shafting of Hydro-generator Set Under Different Faults
Hydraulic-mechanical-electrical coupling factors are often responsible for the vibration of hydro-generator sets.The stability of the unit and the safety of the structure of the hydropower plant are greatly dependent on the analysis of shafting vibration under single fault and multi-factor coupling faults.Under the influence of an unbalanced magnetic pull,friction force,and nonlinear oil film force,this paper uses the fourth order Runge-Kutta method to solve the vibra-tion characteristics of the generator and turbine,respectively.In the presence of unbalanced magnetic force or friction force,shafting dynamic characteristics are mainly periodic and quasi-periodic.The dynamics of shafting will become more complex under the multi-factor coupling,which is mainly characterized by quasi-periodic and chaotic behavior,alongside intermittent periodic hehavior.It provides a theoretical basis for the safe,stable,and optimal operation of hydropower plants.
hydro-generator setunbalanced magnetic pullfriction forcenonlinear oil film forceshafting vibration
NETL
NSTL
万方数据
维普
