RU2567530C1 - Method for increasing gas turbine engine output power in operation - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: before the engine cranking, the inlet distributor and compressor first stage working vanes are cleaned. Prior to feeding the washing solution compressed air is additionally forced to the system of supercharging the engine bearing pre-oil chambers and injector fuel feed manifold. In some 10-15 s after washing solution feed, compressed air feed is shut off. Note here that washing solution is forced via at least one axial compressor channel injector in the direction opposite that of the flow.

EFFECT: ruled out the ingress of washing solution into fuel manifold and injectors and engine oil system.

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Description

The invention relates to the field of operation of gas turbine engines, in particular to engines used as a drive of a supercharger of gas pumping units and power plants, monitoring the technical condition and its restoration.

The closest in technical essence and the achieved result is a known method of increasing the output power of a gas turbine engine during operation, including periodic cleaning in the “scroll” mode of the engine located behind the air duct and containing a compressor having an input guide apparatus and rows of working blades forming stages of air compression, an oil system, a combustion chamber and a fuel supply manifold with fuel nozzles, and cleaning is carried out by supplying washing solution through nozzles to ozduhovod and / or guide vanes and / or one of the higher stages of the compressor and / or combustion chamber (RU №2406841 IPC F02C F02C 7/143 3/30, publ. 20.12.2010).

However, this method does not allow preliminary cleaning of contaminants of the first stages of the compressor and the inlet guide apparatus without getting into the flow part of the removed contaminants. Also, during washing, it is possible that the washing solution enters the pre-oil cavities of the engine mounts, and in the fuel nozzles and in the fuel supply manifold.

The objective of the invention is to develop a method for more efficient flushing of a gas turbine engine during its operation to increase output power.

The expected technical result is a method of increasing the power of a gas turbine engine by preliminary cleaning the inlet guide vane and the blades of the first compressor stage, eliminating the possibility of detergent entering the fuel manifold and fuel nozzles, and eliminating the possibility of detergent entering the engine oil system.

The technical result is achieved by the fact that in the known method of increasing the output power of a gas turbine engine during operation, which provides for periodic cleaning in the “scroll” mode of the engine located behind the air duct and containing a compressor having an input guide apparatus and rows of working blades forming air compression stages, an oil system , a combustion chamber and a fuel supply manifold with fuel nozzles, and cleaning is carried out by supplying washing solution through nozzles into the duct, and / or the washing apparatus, and / or one of the compressor high stages, and / or the combustion chamber, on the proposal, before starting the engine scrolling, the input guide apparatus and the working blades of the first compressor stage are pre-cleaned, and before the washing solution is supplied to the pressurization system of the pre-oil cavities of the engine mounts and compressed air is supplied to the fuel supply manifold to the fuel nozzles and 10 ... 15 s after the completion of the supply of the washing solution, the compressed air supply is shut off, while the washing solution is over at least one nozzle on the axial path of the compressor is fed in the direction opposite to the flow direction.

The gas-air duct of the engine is cleaned by feeding detergent solution through the nozzles into the duct, and / or a guide apparatus, and / or one of the compressor high stages, and / or the combustion chamber. Before starting the “scrolling” of the engine, the input guide vane and the working blades of the first compressor stage are pre-cleaned mechanically (manually or in another way), and before supplying the washing solution, the compressed air is supplied to the fuel injector and to the fuel injector air, while not earlier than 10 ... 15 s after the completion of the supply of the washing solution, the compressed air supply is shut off, and the washing solution, through at least one nozzle tract of the axial compressor is fed in the direction opposite to the flow direction. Compressed air is supplied with a pressure that ensures a positive differential on the nozzles of the fuel system and on the seals of the oil cavities.

In FIG. 1 shows a gas turbine engine installed in a gas pumping unit or power plant with additional communications that implement the proposed method.

A detergent solution supply system 2 is connected to the gas turbine engine 1 with nozzles for spraying the detergent solution 3 (nozzle 7 delivers the solution in the opposite direction to the flow direction) installed along the gas-air path of the engine and in the inlet chamber 5. To the pre-oil cavities of the engine mounts, as well as nozzles and a manifold for supplying fuel to the combustion chamber 6 is connected to a pressurization system 4. As a washing solution, a mixture of water with washing liquids (biodegradable and biodegradable high-quality detergents) is used redstvami based on organic solvents, surfactants and emulsifiers).

Before starting the washing work, preliminary cleaning (manually or otherwise) of the inlet guide vane 8 and the blades of the first stage of the compressor of the gas turbine engine 1 is performed to prevent deposits from the inlet guide vane and the blades of the first stage of the compressor in the engine flow section.

Example

Flushing works are performed during the “cold scrolling” of the engine (starting the engine without supplying fuel to the combustion chamber).

Before starting the flushing: adjust the system of automatic control and regulation of the engine; install and configure the system 2 for the supply of washing solution and water from the installation for washing the flow part of the axial compressor; refuel system 2 with a washing solution and water; connect the air supply system 4; establish containers for draining the fluid from the flow of the engine 1.

When carrying out engine flushing: include a system 4 for supplying air to pressurize the pre-oil cavities of the engine and purging the fuel nozzles of the combustion chamber 6; after 5 seconds, press the "Start" button; 15 seconds after reaching the high-pressure rotor revolutions ~ 2394 ... 2600 rpm (18 ... 20%) turn on the system 2 of the washing solution for 25 ... 30 seconds; 20 ... 25 seconds after the termination of the fluid supply, the engine 1 is stopped; 10 ... 15 seconds after the completion of the supply of the washing solution, the air supply to pressurize the pre-oil cavities of the engine and to blow the nozzles of the combustion chamber is stopped.

During operation of the gas turbine engine, due to contamination of the flow part of the axial compressor, air consumption decreases to 6% and the axial compressor efficiency by 2-3%, which causes a decrease in the useful capacity of the gas turbine to 10% and effective efficiency to 2-5%.

The implementation of the invention allows to increase or restore the original power of the gas turbine engine during operation, reduces the cost of overhaul of the engines (before reaching the overhaul life) caused by the ingress of flushing fluid with sediment elements into the oil system and / or fuel injectors of the engine and / or damage to the engine flow passage by deposits formed during operation.

Claims (1)

A method of increasing the output power of a gas turbine engine during operation, including periodic cleaning in the “scroll” mode of an engine containing an air duct, a compressor having an input guide apparatus and rows of rotor blades forming stages of air compression, an oil system, a combustion chamber and a manifold for supplying fuel to fuel nozzles and the cleaning is carried out by feeding the washing solution through the nozzles into the duct, and / or a guide apparatus, and / or one of the high stages of the compressor, and / or the combustion chamber, it is that before starting the engine scrolling, the input guide vane and the working blades of the first stage of the compressor are pre-cleaned, and before supplying the washing solution, additional compressed air is supplied to the fuel supply system of the pre-oil cavities of the engine mounts and to the fuel supply manifold to the fuel nozzles and after 10 ... 15 c after completion of the supply of the washing solution, the supply of compressed air is shut off, while the washing solution, through at least one nozzle along the axial compressor path, is fed into and in the opposite direction of flow.

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