A large-load isolator is designed for heavy equipment of nuclear power system by combining disc spring with magnetorheological liquid phase.The magnetorheological fluid damper is used as the main damping component,and the composite component of small stiffness and large stiffness disc spring is used as the main bearing structure.Through the analysis and design of the disc spring composite component,the structural parameters of the composite component are determined,and the sample isolator is formed accordingly.The spring rate ratio and damping ratio of the isolator samples were tested.The results show that the rated load of the isolator reaches 11 tons and the natural frequency is about 6.2 Hz.The dynamic stiffness and damping ratio performance of the isolator are relatively stable in the range of main vibration isolation frequencies.However,the dynamic stiffness and damping ratio are greatly affected by the amplitude.When the vibration amplitude increases from 0.05 mm to 0.2 mm,the dynamic stiffness decreases from about 100 kN/mm to about 45 kN/mm,and the damping ratio increases from about 0.07 to about 0.19.The research in this paper can provide technical reference and support for subsequent engineering applications.
关键词
隔振器/大承载/碟形弹簧/刚度/阻尼比
Key words
Isolator/Large-load/Disc springs/Stiffness/Damping ratio
维普
万方数据