TPL-B 91-B12
The ABB TPL‑B 91‑B12 is a high‑capacity turbocharger designed for two‑stroke marine diesel engines, delivering up to 50 MW of boost power and engineered for Tier II emission compliance.
Inspector Detail
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Common issues
- Compressor wheel fouling due to poor air filtration
- Turbine blade erosion from high-temperature exhaust gases
- Bearing failure resulting from inadequate lubrication or contamination
- Seal wear causing oil leakage and turbocharger performance degradation
- Incorrect turbocharger tuning or adjustment leading to reduced engine efficiency
Inspection checklist
- Visual inspection of compressor and turbine blades for fouling or erosion
- Checking bearing condition and lubrication system functionality
- Verifying proper turbocharger mounting and alignment
- Inspecting seal condition and checking for signs of oil leakage
- Reviewing turbocharger performance data and adjusting as necessary
- Checking compressor inlet and outlet pressures
- Verifying turbine inlet temperature and exhaust gas flow rates
- Inspecting turbocharger control systems and sensors
Service intervals
| major_overhaul | 30000 to 40000 hours |
| bearing_replacement | 15000 to 20000 hours |
| seal_replacement | 10000 to 15000 hours |
| compressor_blade_cleaning | 500 to 1000 hours |
Typical wear limits
| compressor_blades | 10% to 15% of original blade height |
| turbine_blades | 5% to 10% of original blade height |
| bearings | 0.1 to 0.2 mm of radial clearance |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Compressor wheel
- Turbine blades
- Bearings
- Seals
- Lubrication system components
- Control system sensors and actuators
Safety
- High-temperature exhaust gases posing a fire hazard
- Rotating components presenting a risk of injury or entanglement
- Oil leakage creating a slip hazard or environmental pollution risk
Class survey
The class surveyor will typically verify the turbocharger's performance, inspect for signs of wear or damage, and review maintenance records to ensure compliance with regulatory requirements and manufacturer recommendations.
Components & Design
Component data being added…
Technical Data
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