T- NA57 turbocharger rotor complete (also called rotor assembly) were developed comparatively simply with a cast axial turbine, which is suitable for heavy fuel oil engines, marine diesel oil engines, biofuel and gas operation enginess. T- NA series turbochargers are available for an engine power range from 1,650 kW to 24,500kW per turbocharger and with easy maintenace or overhaul.
T- NA series turbocharger is widely used in Marine engine, Power engine and Industrial engine.
T- TURBOCHARGER | T- NA Series |
T- NA34/T | |
T- NA34/S | |
T- NA40/T | |
T- NA40/S | |
T- NA48/T | |
T- NA48/S | |
T- NA57/N | |
T- NA57/M | |
T- NA57/T7 | |
T- NA57/T8 | |
T- NA57/T9 | |
T- NA70/T7 | |
T- NA70/T9 |
The turbocharger rotor assembly / rotor complete consists of compressor impeller, blade shaf/turbine shaft/rotor shaft and partition wall complete.
The compressor impeller is of aluminium alloy or the more expensive titanium. ufactured from a single casting it is located on the rotor shaft by splines. Aluminium impellers have a limited life, due to creep, which is dictated by the final air temperature. Often the temperature of air leaving the impeller can be as high as 200°C. The life of the impeller under these circumstances may be limited to about 70000 hours. The turbocharger rotor shaft is equipped with components such as a compressor and a turbine impeller, and has a complicated structure and a large weight. If the ship is parked for a long time, the turbocharger rotor will be bent and deformed due to the long-term non-operating self-weight, which will break the matching gap between the rotor and the casing, the gas seal and the casing, and the rotor will be lost.