Research On The Application Of Impact Damper In Magnetic Bearing System

Based on the theory of impact damping and added damping structure, impact damper and composite damping structure in the magnetic rotor are designed. Principle of vibration absorption of impact damping is analyzed, and factor-loss on structure which is the important indicator of the damping characteristics of composite damping structure is derived by complex stiffness method and mechanism of energy loss. Shearing parameter, loss factor of damping material, and geometric parameters are quantitative studied, of which approximate and integrated optimization is calculated. Noise sources of the magnetic rotor are also analyzed and summarized, which is to provide theoretical basis for the design of the damper. The results of theoretical research show that the damping characteristics of the magnetic rotor can be improved by the added damper, specifically speaking, the vibration intensity and noise of the rotor are reduced.Vibration damping characteristics of impact damper are simulated with ADAMS, which is dynamic analysis software. Simulation research has been made when the magnetic rotor is suspended with pulse excitation, or initial velocity offset, and when the magnetic rotor rotates. Simulation results show that the effect on vibration reduction becomes better with the increase of the quality of the impact blocks, and the impact gap should be optimized in order to having good effect on vibration reduction. Combined with the simulation results, experiments have been studied for the magnetic bearing system with the impact damper. Optimal parameters of the impact damper are finally determined; moreover the effect on vibration reduction of the impact damper is further demonstrated.