Simulation analysis of fault of rolling bearing for gearbox of armored vehicle
                                          SONG Yi long, GAO Xin, WANG Zhi yong, LIN Dong
                             （Shijiazhuang Campus, Army Infantry Academy, Shijiazhuang 050000, China）

Abstract: In order to solve the problem that the bearing of transmission can not be diagnosed in time and accurately, the rigid flexible coupling dynamics simulation technology was applied to the fault diagnosis of gearbox bearing. Firstly, the theory of double impact of bearing was briefly analyzed, then according to the actual parameters of armored vehicles gearbox bearing bearing is a rigid flexible coupling dynamic model of ADAMS based on four different sizes of the bearing outer ring fault were simulated. The outer race fault bearing were analyzed by time frequency characteristic of vibration signals of different sizes under the fault. The validity of the rigid flexible coupling model and simulation process was verified by the experimental analysis. The simulation and experimental results show that double impact phenomenon occurs in the time domain signal with the increase of fault size, According to the time interval of the double impact in the time domain signal, the size of the corresponding outer ring of the bearing can be judged. The results provide the help for grasping the failure of the gearbox of the armored vehicle in time and realizing the safe operation of the armored vehicle.

Key words: armored vehicle; rolling bearing; rigid flexible coupling; fault analysis