Turbocharger · Turbochargers
The ABB Accelleron TPL‑C 91‑C is a high‑capacity turbocharger for large two‑stroke common‑rail marine diesel engines, delivering up to 55 MW of boost with integrated variable geometry for optimal efficiency across the engine speed range.
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| Bearing inspection/replacement | 8,000 - 16,000 running hours (depending on bearing type and operating conditions) |
|---|---|
| Rotor cleaning (water wash) | Compressor: Daily/Weekly as needed; Turbine: Monthly/Quarterly as needed (or based on performance monitoring) |
| Minor inspection (gas/air side cleaning, visual checks) | 4,000 - 8,000 running hours |
| Intermediate inspection (bearing replacement, nozzle ring/diffuser inspection) | 16,000 - 24,000 running hours |
| Major overhaul (rotor removal, balancing, full component inspection/replacement) | 24,000 - 36,000 running hours (or as per manufacturer's specific recommendations and condition monitoring) |
| Axial bearing play | New: 0.15 - 0.30 mm; Max wear limit: 0.40 - 0.60 mm (consult specific manual for exact values) |
|---|---|
| Radial bearing play | New: 0.05 - 0.15 mm; Max wear limit: 0.20 - 0.30 mm (consult specific manual for exact values) |
| Compressor/Turbine blade tip clearance | Varies by frame size, typically 0.3 - 0.8 mm new. Wear limit often +0.1 to +0.2 mm over new, indicating blade erosion or casing wear. |
| Nozzle ring opening | Erosion can increase the opening. A 5-10% increase in flow area due to erosion can significantly impact performance. Measured during overhaul. |
| Rotor imbalance | Not a field measurement, but critical during overhaul. Max permissible residual imbalance typically specified in g*mm. |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically focus on the overall operational integrity and safety of the turbocharger. They will check for absence of oil/gas leaks, general cleanliness, and proper insulation/guarding. They will review maintenance records (logbook entries for inspections, overhauls, bearing replacements, cleaning), and verify that critical parameters like bearing temperatures and vibration levels (if monitored) are within limits. Performance parameters such as boost pressure and exhaust temperatures may be observed. The surveyor will also confirm the functionality of any associated safety devices, such as overspeed trips or alarm systems, and ensure that spare parts holdings align with class requirements for critical machinery.
Estimated lifetime: 24,000 - 36,000 running hours before major overhaul (where the unit is fully disassembled, inspected, and critical components replaced/reconditioned to restore near-new performance). The overall structural lifetime of the casing and major non-wear components can exceed 100,000 hours with proper maintenance.
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