TURBINE

The axial-flow reaction turbine is designed to convert thermal energy of hot gases into mechanical work spent to rotate engine rotor, compressor and engine accessories and to transmit excessive power to the generator shaft.

A cantilever type turbine rotor comprises three rotor wheels and a shaft which are bolted to each other.

The shrouded turbine blades are fitted in pairs into the disk fir-tree slots.

Manufacture of disks, blades and other parts operating at high temperature from high temperature and heat-resistant materials and their effective cooling by air bled downstream of the compressor ensure turbine reliable operation.

High turbine efficiency is achieved due to use of the labyrinth seals which reduce gas leakage through radial clearances betwen the rotor and stator components.

LUBRICATION AND BREATHING SYSTEM OF ENGINE

The engine lubrication is effected on the principle of closed system in which the delivered and scavenged oils continuously circulate in a closed loop. The oil flows from the oil tank into the oil system as required to compensate for the oil consumed during engine operation.

All internal chambers of the engine are vented to provide for normal operation of the oil system and seals.

STARTING SYSTEM

Idle power RPM are attained by the engine rotor automatically. The rotor is spinned by two starter-generators.

To ensure compressor steady operation at starting, the air is allowed to be discharged into the atmosphere. The rotational speed and respective fuel consumption are controlled by the fuel control unit.

ANTI-ICING SYSTEM

A special unit warns about ice formation at the engine inlet. The hot air for heating compressor inlet guide vanes and other components, located at the engine inlet, is supplied by means of an electric actuator through the linkage system.

The internal chambers of front casing ribs are constantly heated with the hot circulating oil.

MOUNTING ENGINE ON POWER GENERATING UNIT FRAME

The engine is mounted with the help of four trunnions, two of them being located on the front casing in horizontal plane and the other two on the flange of the compressor-to-combustion chamber casings joint at 7 deg angle to the horizontal axis.

DELIVERY SET

The individual set of spare parts and the engine operation and maintenance publications are delivered with the engine.

IN-SERVICE MAINTENANCE

• service attendance by the manufacturer,
• low operation expenditures,
• low maintenance expenses,
• high operational reliability,
• flexibility and timeliness in eliminating faults,
• servicing at any place of the world,
• technical servicing on the ‘on condition’ basis,
• deputing Manufacturer’s specialists for start-up period and, if necessary, for any period of operation,
• theoretical and practical training of Customer’s specialists at the manufacturing plant or at the operation site in any place of the world,
• providing the Customer with information thus making it possible to avoid mistakes when operating our engines.

The experience in supervising engines by Motor Sich JSC specialists in service numbers dozens of years.

REPAIR SERVICING

In performing repair servicing the manufacturer is concerned with:

• control of all operations involved,
• delivery of necessary parts, units and other articles for the local repair in service,
• overhaul of the engine at the manufacturing plant with assignment of the original overhaul life and original preset characteristics (basic data) being restored,
• cooperation with the companies which are intended to establish repair facilities of their own.

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