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

Table 3

Running parameters of a high-pressure steam turbine rotor.

Index	Parameters	Unit	Symbol
1	Steam temperature of high-pressure cylinder shaft seal	°C	HT1
2	Temperature difference between upper and lower cylinders of a high-pressure cylinder	°C	HT2
3	Expansion value of a high-pressure cylinder	mm	HE1
4	The change rate of unit load	Mw/min	HC1
5	High-pressure cylinder temperature	°C	HT3
6	Lubricating oil temperature of high-pressure rotor	°C	HT4
7	Fundamental frequency amplitude of No.1 bearing shaft vibration in X direction of a high-pressure rotor	mm	X1
8	Fundamental frequency amplitude of No.1 bearing shaft vibration in Y direction of a high-pressure rotor	mm	Y1
9	Fundamental frequency amplitude of No.1 bearing pedestal vibration in X direction of a high-pressure rotor	mm	X2
10	Fundamental frequency amplitude of No.1 bearing pedestal vibration in Y direction of a high-pressure rotor	mm	Y2