Silencer for heavy fixed-wing unmanned aerial vehicle

Abstract

The invention discloses a silencer for a heavy fixed-wing unmanned aerial vehicle. The silencer is composed of a silencer body, an impedance material and a coiled pipeline. The silencer body is of a coiled structure, resistive noise reduction is designed on the upper end face and the lower end face of the silencer, resistance noise reduction is involved in the pipeline, a honeycomb core is arranged on the inner surface of the pipeline, airflow can flow in the smooth pipeline, meanwhile, resistive resistance noise reduction is achieved, and therefore the power influence of airflow resistance ona small-displacement engine is reduced. The silencer has the advantages that the structure is simple, so that the space utilization structure of the silencer is compact; and meanwhile, an exhaust guide pipe is short, so that the silencer is lighter in weight and smaller in airflow resistance. Under the condition that special application environment requirements exist, the strict requirements forthe weight, the installation space and the exhaust resistance of the silencer when the silencer is applied to the unmanned aerial vehicle are effectively met; and the silencer can also be used as a silencing device of an automobile, and can be used in other occasions where flowing gas is silenced.

Description

technical field [0001] The invention relates to the technical field of UAV noise reduction device design, in particular to a noise reduction device for heavy-duty fixed-wing UAVs. Background technique [0002] Unmanned aircraft is an aircraft mainly controlled by radio remote control or by its own program. It has the characteristics of small size, low cost and easy to use. In terms of military affairs, drones are favored by armies all over the world because of their low requirements on the combat environment and strong battlefield survivability. In terms of civilian use, drones are also widely used in fields such as aerial photography, geophysical prospecting, disaster monitoring, and coastal anti-smuggling. But for a long time, drones have been one of the main problems affecting their performance due to noise. [0003] The noise of drones is mainly composed of aerodynamic noise and power system noise. At present, the most commonly used low-speed, medium and low-altitude d...

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies in the prior art and to overcome the problems of relatively large volume and low structural space utilization efficiency of the mufflers of small and medium-sized drones, the present invention proposes a muffler for heavy-duty fixed-wing unmanned aerial vehicles; the muffler Through the coiled structure, resistive noise reduction is designed on the upper and lower end surfaces of the muffler, and the resistance noise reduction is involved in the pipeline, so that the airflow can flow in the unobstructed pipeline, and at the same time realize the resistive noise reduction, so as to reduce the airflow resistance. The dynamic impact of small displacement engines; the muffler has the characteristics of simple structure, light weight, smaller airflow resistance and higher space utilization

Images