Numerical Analysis of Magnetically Suspended Rotor in HTR-10 Helium Circulator Being Dropped into Auxiliary Bearings

Active magnetic bearings（AMB） have been selected to support the rotor of primary helium circulator in commercial 10 Mega-Walt High Temperature Gas-cooled Reactor（HTR-10）.In an AMB system,the auxiliary bearings are necessary to protect the AMB components in case of losing power.This paper performs the impact simulation of Magnetically Suspended Rotor in HTR-10 Helium Circulator being dropped into the auxiliary bearings using the finite element program ABAQUS.The dynamic response and the strain field of auxiliary bearings are analyzed.The results achieved by the numerical analysis are in agreement with the experiment results.Therefore,the feasibility of the design of auxiliary bearing and the possibility of using the AMB system in the HTR are proved.