Impact-Rubbing Dynamic Behavior of Magnetic-Liquid Double Suspension Bearing under Different Protective Bearing Forms

The magnetic-liquid double suspension bearing (MLDSB) is a new type of bearing, with electromagnetic as the main part and hydrostatic supports auxiliary part. It can greatly improve capacity stiffness rotor-bearing systems suitable for medium speed, heavy load, frequent starting occasions. Compared active system, traditional protective device replaced by system in MLDSB, impact-rubbing phenomenon be restrained buffered. Thus, probability degree friction wear between rotor magnetic pole are reduced drastically when fails. In order to explore difference dynamic behavior law protection equations three kinds devices (fixed ring/deep groove ball bearing/hydrostatic system) under failure mode established, axial trajectory motion numerically simulated. Finally, characteristics compared analyzed. results show that: Among system), has least influence on bouncing time, force, degree, maximum force MLDSB reduced. Therefore, bear not required installed MLDSB. This study provides basis theory “gap impact-rubbing” failure, helps identify faults.