Turbocharger · Turbochargers
The ABB A180-L turbocharger is a high‑capacity axial‑flow unit built for large two‑stroke slow‑speed diesel engines, providing up to 40 MW of boost power and improving overall propulsion efficiency.
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| Daily/Weekly | Visual inspection, performance monitoring, compressor washing (as required) |
|---|---|
| Weekly/Monthly | Turbine washing (as required) |
| 8,000 - 12,000 hours | Journal bearing inspection and/or renewal |
| 16,000 - 24,000 hours | Thrust bearing inspection and/or renewal, nozzle ring inspection, minor rotor balancing if needed |
| 32,000 - 48,000 hours | Major overhaul (rotor removal, full inspection, cleaning, balancing, replacement of wear parts) |
| Every 5 years or 20,000 hours (whichever comes first) | Class survey inspection of internal components during major overhaul |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Journal Bearing Radial Clearance | Typically 0.15 - 0.30 mm (check manufacturer's manual for exact values) |
|---|---|
| Thrust Bearing Axial Clearance | Typically 0.20 - 0.40 mm (check manufacturer's manual for exact values) |
| Rotor Shaft Run-out | Max permissible deviation usually < 0.05 mm at bearing journals |
| Compressor/Turbine Blade Thickness | Minimum permissible thickness reduction due to erosion (e.g., > 10-15% reduction from new is critical) |
| Nozzle Ring Gap/Distortion | Max permissible increase in nozzle gap or distortion affecting gas flow (e.g., > 0.5 mm distortion) |
| Bearing Housing Bore Diameter | Max permissible ovality or increase from nominal diameter |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors will primarily focus on the overall structural integrity, secure mounting, and operational safety of the turbocharger. This includes visual inspection for any signs of leaks, cracks, or corrosion on casings, piping, and foundations. They will verify that the turbocharger's performance parameters (RPM, boost pressure, temperatures) are within acceptable limits by reviewing logbook entries. Maintenance records, particularly for major overhauls (e.g., 5-year survey intervals), bearing renewals, and rotor inspections, must be up-to-date and demonstrate compliance with manufacturer's recommendations and class requirements. The functionality of safety devices, such as overspeed protection (if applicable) and any pressure relief arrangements, will be checked. Insulation integrity on hot surfaces and proper guarding will also be confirmed.
Estimated lifetime: 150,000 - 200,000 hours (total operational life of the unit with regular maintenance and component renewal during overhauls)
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