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2. Rotor Maintenance

Turbine Rotor Maintenance

Turbine rotor maintenance procedures are critical for ensuring the safe and stable operation of the unit. This process involves multiple steps including lifting, cleaning, inspection, measurement, and deformation assessment, all of which must strictly adhere to technical specifications.

1. After opening the cylinder, conduct a visual inspection of the turbine rotor. This primarily includes checking the main shaft, impeller, blades, and shrouds for signs of wear, looseness, cracks, or deformation.

2. Perform data inspections on critical components including rotor journal, thrust disc, impeller, and coupling center:

1) Measure main oil pump and thrust disc runout;

2) Measure rotor journal runout and rotor pitch angle;

3) Measure impeller runout and main shaft deflection;

4) Inspect coupling center alignment;

3. Rotor lifting preparation and hoisting:

Before lifting, inspect the integrity of specialized tools, slings, and wire ropes.

4. Cleaning and inspection of blades and impellers:

Blade cleaning may be performed manually or via sandblasting. Post-cleaning inspection for cracks, damage, and other defects is required. Inspection methods include: acoustic testing, visual inspection, and non-destructive testing (e.g., magnetic particle testing, ultrasonic testing).