Research For Unbalance Response And Balancing Methods Of Anisotropic Rotor

As the rotating machinery gradually developing with the direction of large-scale,high-speed,preciseness and complication,because,the rotor is the main component of the rotating machinery,and unbalance is the main fault types of rotating machinery,so it is particularly necessary to study and develop the rotor dynamic balancing technology.In practical engineering application,the anisotropy of the rotor system is inevitably exist because of its structure and the long-term operation,which will lead to the difference of rotor unbalance response between each directions.While the traditional dynamic balancing method which using single channel information is not able to fully express the unbalance response of the rotor.Therefore,the Full Vector Dynamic Balancing method(FVDB)which based on influence coefficient method and the full vector spectrum technology make up disadvantage of the traditional method.the full vector spectrum based on the homologous information fusion technology which combines the maximum intensity under the single channel information,and The intensity of each harmonic is represented by the long axis and the phase of the ellipse.This paper analyses the unbalance response and dynamic balance methods of the rotor with anisotropy bearing,and illustrates the advantages of full vector dynamic balance in dynamic balancing.Analyzing the law of unbalance response of the rotor with anisotropy bearing by simulation.selecting appropriate rotor model to carry on the simulation,taking the numerical simulation of the relationship between anisotropic stiffness,anisotropic damping,cross stiffness damping(that is,the differences in the direction of x,y)and amplitude of x,y direction(that is,the amplitude ratio),analyzing and studying the rule of amplitude ratio,amplitude of x and y direction is consistent when the stiffness or damping is isotropic;otherwise,the amplitude ratio of x,y direction tends to be stable along with the increase of the difference between two direction,but the amplitude of the two direction is not same,which does the foundation for next step of simulation and analysis.In the means of virtual balance method.choosing the appropriate model of rotor system,and based in the law of unbalance response of the rotor with anisotropy bearing by simulation,then using the single x sensor,the single y sensor,the full vector dynamic balancing method for single and double dynamic balance which respectively under the anisotropic rotor system of similar response and differentresponce.Comparatively analyzing their respective used equilibrium conditions and situations for the traditional dynamic balancing and the full vector dynamic balancing method.Finally on the bently experiment,the simulation results are verified through the experimentation.First experiment is proved the existence of anisotropy;then to balance it respectively with the traditional dynamic balancing method and the full vector dynamic balance method.Comparing the error between the corrected mass and the original unbalance mass respectively after two kinds of dynamic balance method,it is concluded that the effectiveness of the full vector dynamic balancing method.