Study on Intelligent Diagnosis of Rotor Fault Causes with the PSO-XGBoost Algorithm

Table 2

The specific rotor fault causes.

Number	Fault type	Cause description	Number of samples	Label
1	Rubbing fault (F1)	Rubbing at shaft seal caused by cylinder deformation	50	C1
2		Rubbing at shaft seal caused by the fast rate of loading up	50	C2
3		Rubbing at shaft seal caused by the long time of low load remaining	50	C3
4		Rotor rubbing with oil baffle	50	C4
5	Mass imbalance fault (F2)	Poor stiffness of bearing pedestal	50	C5
6		Fracture and falling off of rotating parts (blades and coupling wind shields)	50	C6
7		Other reasons	50	C7
8	Self-excited oscillation (F3)	Poor stability of bearing	50	C8
9		Excessive journal disturbance	50	C9