Fuel supply system suitable for emergency state

Abstract

The invention discloses a fuel supply system suitable for an emergency state. The fuel supply system comprises an electro-hydraulic servo valve; a fuel guide system includes a high-pressure fuel booster pump; the high-pressure fuel booster pump is connected with a high-pressure fuel filter, a nozzle force application adjuster and a fuel guide valve on the electro-hydraulic servo valve through pipes; the fuel guide system includes a main pump-controller; the main pump-controller is connected with a fuel oil cooler, a fuel filter, a main fuel distributor and a fuel supply valve on the electro-hydraulic servo valve through pipes in sequence; the main fuel distributor is connected with a main combustion chamber inlet through a pipe; a fuel return system includes a fuel inlet centrifugal booster pump; the fuel inlet centrifugal booster pump is connected with a fuel return valve on the electro-hydraulic servo valve and the main pump-controller through pipes; and the electro-hydraulic servo valve is externally connected with an electro-hydraulic servo valve controller. When an aircraft meets an emergency, and the fuel supply system cannot normally work, fuel is supplied to a combustion chamber, so that the aircraft can normally operate, the working reliability of the fuel supply system is improved, the heavy loss is prevented, and the application prospect is broad.

Description

Technical field: [0001] The invention relates to the technical field of engine fuel systems, in particular to a fuel supply system suitable for emergency situations. Background technique: [0002] The aircraft engine fuel system is used for functions such as supplying fuel to the engine and automatically maintaining a stable working state. The system mainly includes main pump, fuel distributor, fuel main pipe, fuel filter and so on. Under normal working conditions, the main pump-regulator supplies metered fuel to the main combustion chamber for engine combustion to generate kinetic energy. The main pump-regulator is a fuel accessory with a complex structure and multiple control functions, and has a high failure rate. Because it is a single margin fuel supply device, when its fuel supply function cannot work normally, the fuel cannot be supplied to the combustion chamber for combustion, the engine loses power, and the aircraft cannot maintain the flight state, causing serio...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fuel oil supply system suitable for emergency situations, to solve the problems of failure of the main pump-controller, failure to supply oil to the combustion chamber through the main fuel distributor, and loss of power of the engine

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