The transient responses of a rotor dropping on a rolling element back-up bearing with a fixed radial clearance after the active magnetic bearing(AMB) failure are measured in a flexible rotor on the AMBs,and the effect is investigated of rotational speed,rotor imbalance and lubrication condition in the contact surfaces of the back-up bearing on the transient response of the rotor system.

The thesis gives an outline of the assembly process,the development of equipments,the prospect and the applied situation in bearing equipment enterprises as well as different market guidances for bearing assembly equip- ments.