Fault Analysis and Calculation of Aero-engine Main Shaft Bearing Slipping Based on BSS

During the operation of an aero-engine, bearing skidding often occurs, causing varying degrees of damage to the rolling elements and raceways, affecting the life of the bearing, and severely restricting the reliability of the engine. In the actual engine operation process, due to the complexity of the system, it is difficult to directly install various sensors on the bearing to measure the speed, vibrating and other signals of the main shaft bearings. At the same time, there are situations where signals are mixed. For this reason, the BSS theory is used to separate the bearing vibration signal, and the cage slipping rate is obtained based on the relationship between the cage slipping and the fault characteristic frequency.