Double-cavity fuel system suitable for diving flight of unmanned aerial vehicle and design method thereof

Abstract

The invention provides a double-cavity fuel oil system suitable for diving flight of an unmanned aerial vehicle and a design method thereof. An outlet of a soft oil tank in the double-cavity fuel oilsystem communicates with an oil inlet in the upper end of an oil-gas separator through an oil pump, and an oil outlet in the lower end of the oil-gas separator is externally connected with an engine oil inlet through a one-way valve. An oil inlet and an exhaust port are formed in an upper end cover of the oil-gas separator; an oil outlet is formed in the lower part of the side wall of the oil-gasseparator; and a liquid level sensor is mounted on a side wall plate of the upper cavity. The oil-gas separator is divided into an upper cavity and a lower cavity. Reliable oil supply during normal flight of the unmanned aerial vehicle can be met, the fuel oil system can stably and reliably supply pure fuel oil to the engine when the unmanned aerial vehicle flies in a large maneuvering flight attitude, especially in dive flight and pull-up re-flight, normal work of the engine is guaranteed, and the influence on the oil supply reliability at the oil outlet due to violent shaking of the fuel oilliquid level caused by adverse factors such as yawing, overload and wind gushing of the unmanned aerial vehicle during flight can be effectively avoided.

Description

technical field [0001] The invention relates to the field of fuel systems for unmanned aerial vehicles, in particular to a fuel system with a double-cavity structure that is suitable for the unmanned aerial vehicle's large-angle attitude dive flight and can still work reliably after being pulled up. Background technique [0002] The UAV fuel system is used to store the fuel required by the onboard engine, and to supply fuel with specified pressure and flow to the engine in a certain order under all flight states and working conditions allowed by the UAV. With the rapid development of the UAV industry, UAVs have been widely used in military fields such as technical reconnaissance, patrol surveillance, and target attack, as well as civilian fields such as geological surveying and mapping, and mineral exploration. For most drones used for reconnaissance, patrol, mapping, and exploration, there is no need for strong maneuverability, and there is no flight state such as large-ang...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortage that the fuel system in the prior art cannot satisfy the normal fuel supply when the UAV is flying at a large angle, the present invention proposes a dual-chamber fuel system and its design method suitable for the UAV’s diving flight

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