Study On Dynamic Balancing Technology For 1000KW Of Nuclear Power Shrinking Rotor Based On Genetic Algorithm

With global warming,increasing haze,the world would like to be able to maintain a strong economic growth in the premise of the power supply.Under this background,nuclear power has become one of the most clean and inexpensive alternatives to conventional thermal power in the Chinese market.But nuclear power units especially 1000 MW class nuclear power units,as compared the same level of millions of conventional thermal power units,longer and larger the span and the diameter of the low pressure rotor,so the shafting for mass unbalance is more sensitive,alone at the end of the second stage blade weighing sorting has been unable to meet the million nuclear power steam turbine rotor in the factory vibration speed control requirements.The purpose of this study is through prior optimum wheel unbalance quality vector and to reduce the rotor in dynamic balance experiment of uneven quality.Based on the analysis of the relationship between the radial pulsation of each section of the rotor and the rotor speed,the use of genetic algorithm to optimize the beating capacity of the disc is optimized.The first sample of the existing rotor run-out of uneven quality simulation,the actual beating amount into the shaft vibration response curve simulated by dynamic balance,measured in the laboratory response curves and simulation were compared to confirm the accuracy of the simulation program;secondly the run-out of standard particle genetic algorithm to optimize the implementation of set wheel,reduce the rotor unbalance vector and purpose;again against the limitations of the particle swarm algorithm,the improved particle swarm algorithm,further optimization of the wheel run-out at the end of the suit;optimization of unbalanced sample quality disc rotor after the actual vibration test,the vibration simulation optimized speed response and measured results verify the dynamic balance of reliability optimization technology,can provide a reference for future practice.In this paper,a set of rotor active balancing method for by prior adjustment wheel installation angle and reduce the whole rotor unbalance vector and without changing the existing processing equipment and the rotor with rebuilt positive cases,reduce the production system in the cumulative unbalance significantly reduced movable counterweight experiment time and weight distribution,greatly improving production efficiency,and reducing the dynamic balance,the frequent starting and stop the unnecessary cost,the technology can be in power generation equipment of dynamic balance application.