2009祝长生主动电磁轴承失效后柔性转子坠落在备用轴承上的瞬态响应实验研究.pdf

30 8 Vol30 No8 2009 8 ACTA AERONAUTICA ET ASTRONAUT ICA SINICA Aug. 2009 :2009) ( , 310027) Experimental Investigation into the Transient Response of a Flexible Rotor Dropping on a Backup Bearing After Active Magnetic Bearing Failure Zhu Changsheng (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China) : , , ,, , : ; ; ; ; : TH 113 : A Abstract: The transient responses of a rotor dropping on a rolling ele ent backup bearing with a fixed radial clearance after the active agneticbearing ( AMB) failure are easured in a flexible rotor on the AM Bs, and the effect is investigated of rotational speed, rotor i balance and lubrication condition in the contact surfaces of the backup bearing on thetransient response of the rotor syste . It is found that in ost cases, the otion of the rotor syste after theAMB failure is a backandforth oscillation otion with bounces in thebotto half of the clearance circle and a full clearance whirl otion with i pact. T hetransient otion of the rotor syste af ter theAMB failure depends greatly on thevibration of the rotor syste , rotational speed at dropping, and lu brication condition in the contact surfaces of the backup bearing. Changing the lubrication condition in the contact surfaces of thebackup bearing can effectively affect thetransient response of therotor syste after the AMB failure, significantly reduce the possibility of the occurrence of full clearance whirl otion with i pact and full cl