T- AT14 Turbo Nozzle Ring Guide Vane For T- IHI Turbocharger Marine Propulsion Engines

T- AT14 Turbo Nozzle Ring Guide Vane For T- IHI Turbocharger​ Marine Propulsion Engines

T- IHI / T- AT14 series exhaust gas turbocharger design features:

T- AT14 turbo nozzle ring ( also called guide vane) is one part of T- IHI / T- AT14 series exhaust gas turbocharger with design features as below:

• T-IHI/ T- AT14 turbochargers is high pressure ratio turbocharger for use with 500 kW class marine engines.
• T-AT14 turbocharger compressor is capable of achieving a maximum pressure ratio of 5.0.
• T-AT14 turbochargers applied in diesel engine and its output can cover approx. 320-750 kW.
• T-AT14 is easy maintenance with low life cycle cost. 
• T-AT14 turbocharger has enough reliability and durability even under the heavy duty fuel oil application.

T- IHI turbocharger types include:

Applications:

Automotive, heavy truck, construction, marine and industrial engine.

T- AT14 turbocharger nozzle ring (guide vane) picture:

The description of T- AT14 turbocharger nozzle ring (guide vane):

The turbine is driven by the engine exhaust gas, which enters via the gas inlet casing. The gas expands through a nozzle ring where the pressure energy of the gas is converted to kinetic energy. This high velocity gas is directed onto the turbine blades where it drives the turbine wheel, and thus the compressor at high speeds (10 -15000 rpm). The exhaust gas then passes through the outlet casing to the exhaust uptakes.

The turbocharger nozzle ring is usually fabricated from a creep resistant chromium nickel alloy, heat resisting moly-chrome nickel steel or a nimonic alloy which will withstand the high temperatures and be resistant to corrosion.

Furthermore, due to its function is to convert the exhaust gas into kinetic energy, the precision processing of the nozzle ring is highly demanded.

Brief introduction of marine turbocharger:

Marine turbocharger / Exhaust gas turbochargers operate at high speeds, high exhaust gas temperatures, high air and exhaust gas flow rates, and high flow rates. Generally, the pressure of the exhaust gas is 0.25-0.45 MPa, and the exhaust gas temperature is 500-600 °C. The speed varies with the size of the Marine turbocharger / supercharger. The maximum speed of the large-sized supercharger is 10000 r/min, and the maximum speed of the small-sized supercharger can reach 40,000~50000r/min. Therefore, the marine turbocharger/exhaust gas turbocharger is a precision machine.

When the diesel-exhaust turbocharger combination is in operation, the marine turbocharger/exhaust gas turbocharger is prone to failures such as turbine casing corrosion, bearing damage, blade damage, gas seal damage, and supercharger vibration. The daily good maintenance management can reduce these failures.