MET-MBII

Typowe problemy

• Turbine nozzle ring and blade fouling (carbon deposits from exhaust gas)
• Compressor impeller and diffuser fouling (oil mist, dust, salt)
• Radial and thrust bearing wear due to contaminated lubricating oil or high loads
• Rotor imbalance and vibration from uneven deposits or blade damage
• Labyrinth seal ring wear leading to oil leakage into air/gas streams
• Exhaust gas casing cracks due to thermal stress cycling
• Air filter clogging reducing turbocharger efficiency and increasing surging risk
• Surging events caused by engine load fluctuations, fouling, or operational issues

Lista kontrolna przeglądu

• Monitor operational parameters: RPM, exhaust gas temperatures (in/out), charge air pressure/temperature, lube oil pressure/temperature (in/out).
• Perform visual inspection for external oil/gas leaks, casing cracks, loose fastenings, and general cleanliness.
• Check air filter condition and clean/replace as necessary.
• Listen for abnormal noises (whining, grinding) and monitor vibration levels (using portable or fixed sensors).
• Inspect compressor and turbine sides (via inspection ports or during opening) for fouling, blade damage, and foreign object damage (FOD).
• Verify proper functioning of the water washing system for both compressor and turbine.
• Check lube oil quality and level, ensuring no contamination.
• Conduct an overspeed trip test annually, witnessed by Class Surveyor.
• During overhaul, measure rotor axial and radial clearances, and inspect bearing surfaces for wear, scoring, or pitting.

Interwały serwisowe

Typowe granice zużycia

Zakresy są typowe dla tej klasy konstrukcyjnej. Decydujące są zawsze dokumenty producenta dla danego numeru seryjnego.

Krytyczne części zamienne

• Complete set of radial and thrust bearings
• Labyrinth seal rings (compressor and turbine side)
• O-rings and gaskets for all casing sections
• Air filter elements
• Cleaning nozzles/lances for water washing system
• Lube oil filter elements (if dedicated system)
• Spare rotor cartridge (for critical operations or extended voyages)

Bezpieczeństwo

• High rotational speed: Risk of rotor disintegration if overspeed or severe imbalance occurs. Always follow strict lockout/tagout procedures.
• High temperatures: Exhaust gas casing and turbine components operate at extreme temperatures. Risk of severe burns.
• Pressurized systems: Charge air and exhaust gas systems are under pressure. Ensure depressurization before opening.
• Hot lubricating oil: Risk of burns and fire if leaks occur onto hot surfaces.
• Noise levels: High noise during operation requires hearing protection in the vicinity.

Przegląd klasyfikacyjny

For annual survey, the surveyor typically checks operational parameters, external condition, reviews logbook entries for maintenance and abnormal events, and witnesses the overspeed trip test. For intermediate/special surveys, internal inspection of the compressor and turbine sides, bearing inspection, NDT (Non-Destructive Testing) of critical components (e.g., rotor shaft, casing welds), measurement of clearances, and verification of spare parts inventory are usually required. All maintenance records and manufacturer's service schedules must be available and up-to-date.

Szacowana trwałość: 80,000 - 100,000 hours (for main casing and rotor shaft, with regular component overhauls and replacements)