Turbocharger · Turbochargers
The ABB Turbocharging A100-M 100‑M47 is a high‑efficiency turbocharger designed for four‑stroke medium‑speed marine diesel engines up to about 8 MW, delivering compact power boost and reduced exhaust emissions.
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| Compressor Water Wash | Daily to Weekly (as per engine maker's recommendation and operational experience) |
|---|---|
| Turbine Dry/Wet Wash | Weekly to Monthly (as per engine maker's recommendation and operational experience) |
| Bearing Inspection/Renewal | 8,000 - 12,000 running hours (or annually, whichever comes first) |
| Rotor Inspection/Balancing | 16,000 - 24,000 running hours |
| Major Overhaul (full disassembly, inspection, renewal of wear parts) | 24,000 - 36,000 running hours |
| Rotor Axial Clearance | New: 0.15 - 0.30 mm; Wear Limit: +0.10 mm from new (e.g., 0.25 - 0.40 mm) |
|---|---|
| Rotor Radial Clearance (Bearing Play) | New: 0.20 - 0.40 mm; Wear Limit: +0.15 mm from new (e.g., 0.35 - 0.55 mm) |
| Bearing Shell Thickness/Condition | No significant scoring, pitting, or delamination. Thickness reduction typically not exceeding 0.1 mm from new. |
| Shaft Runout | Maximum permissible runout typically 0.02 - 0.05 mm at specified points. |
| Blade Erosion/Damage | Minor nicks/erosion acceptable within manufacturer's limits (e.g., depth < 10% of blade thickness, not affecting critical areas). Significant damage requires replacement or expert repair. |
| Nozzle Ring Gap | Check for widening due to erosion; typically, max increase of 10-15% from new gap. |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically verify the following: 1. Maintenance records and service history (last major overhaul, bearing renewals, cleaning cycles). 2. Operational performance: observe boost pressure, exhaust gas temperatures, and turbocharger speed at various engine loads. 3. General condition: absence of oil leaks, cracks in casings/piping, secure mounting, and intact insulation. 4. Functionality of safety devices: overspeed trip, bearing temperature alarms (if fitted). 5. Integrity of exhaust gas system and air intake. 6. Availability of critical spare parts onboard. 7. Confirmation of compliance with manufacturer's service bulletins and recommendations.
Estimated lifetime: 24,000 - 36,000 running hours before major overhaul; total unit lifetime can exceed 80,000 hours with proper maintenance and multiple overhauls.
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