Failure Analysis for Rolling Bearing of an Aero-engine Compressor
This paper takes the roller bearing of an aero-engine compressor as the research object, and focuses on the sudden increase of vibration and the fracture of the connecting shaft of the diaphragm coupling during the whole engine test. Firstly, according to the results of physical and chemical analysis and vibration data analysis, it is determined that the "roller bearing damage" is the direct cause of the fault. Combined with the fault tree, various causes that may cause bearing damage were investigated. Finally, through the analysis of the deformation of the central tie rod, the modal test and the analysis of the vibration stress data of the elastic support, it was determined that "the small preload of the bearing causes the rotor to be unstable" is the root cause of the fault. This paper reveals the mechanism process of the fault, determines the cause of the fault, and puts forward that in the process of engine assembly, the axial deformation of the blade disk should be considered while paying attention to the deformation of the central tie rod, which provides a reference for the design and assembly of other models.
万方数据
维普
