There are some problems such as “large unbalance value

aggregations of blades mass or massradins product and unstable assembly sequence of special blade” in rotor blades assembly sequences in a factory

which lead to ultra gaps arising between intermediates and shroud rings during the rotor blades installation. Based on a brief analysis of rotor blades assembly and weighing principle

an intelligent optimization method of rotor blades installation sort was presented in combination with the overall optimization and rapid convergence of genetic algorithm. According to fitup gaps of a certain grade rotor blade and test data of rotor dynamic balance

the optimization algorithm improved the qualification rate of fitup gap of the whole grade blade from 683% to 866%

reduced the rotor balancing counterweight block by about 492%

and decreased the journal vibration value by about 252% when the rotor rotated at 3000r/min.