Self-adapting pressurizing oil supplying system for small unmanned aerial vehicle

Abstract

The invention discloses an oil supplying control system for a small unmanned aerial vehicle. The unmanned aerial vehicle comprises a turbojet engine and an oil tank, wherein the turbojet engine supplies power to the unmanned aerial vehicle, and the oil tank supplies oil to the turbojet engine. The oil supplying control system is characterized by comprising a gas guiding pipe, and the gas guiding pipe guides part of gas generated by the turbojet engine into the oil tank. It is guaranteed that the pressure of the oil supplying system can be effectively increased in various working conditions, the service life of a fuel pump is prolonged, and safe and reliable operation of the unmanned aerial vehicle is guaranteed.

Description

technical field [0001] The invention relates to the field of aviation, more specifically to an unmanned aerial vehicle and an aeroengine oil supply system, and is especially suitable for a small high-altitude unmanned aerial vehicle and a turbojet power device thereof. Background technique [0002] Small high-altitude UAVs can be used for reconnaissance, detection, attack, targeting, etc., and their conventional flight altitudes are mostly at an altitude of 5,000 to 12,000 meters. This type of UAV is usually equipped with a turbojet engine as its power device. The fuel required by the turbojet engine is stored in the aircraft fuel tank, and a fuel system, mainly a fuel pump, is required to deliver the fuel to the engine combustion chamber. When the flying altitude of the UAV exceeds 5000 meters, the atmospheric pressure will be lower than 55kPa, the fuel supply pressure in front of the fuel pump is low, and the fuel supply capacity is greatly weakened; moreover, when the UAV...

AI Technical Summary

Problems solved by technology

However, these two methods still have certain limitations when used on small UAVs: (1) Adding a booster oil pump will consume the limited power of the UAV and affect the power supply of other airborne equipment; at the same time, the booster pump itself Lifespan is also limited

(2) Constrained by the limited fuel tank space of small UAVs, the use of self-pressurized fuel tanks will further compress the fuel tank space and reduce the effective fuel load of the aircraft; and with the consumption of compressed nitrogen gas filled, the pressurization capacity of the fuel tank is constantly attenuating , and cannot adapt to the different pressurization requirements of UAVs for different working conditions

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