A silent propeller and its rotor drone

Abstract

The invention relates to a silent blade, which includes a blade body; a plurality of unequal sawtooth grooves are formed on the trailing edge of the blade body, and a plurality of unequal distances are formed between the plurality of unequal sawtooth grooves and the blade body. Sawtooth; the suction surface of the blade body is bonded with a microarray diaphragm structure; the microarray diaphragm structure is composed of several protrusions of different lengths; several protrusions of different lengths are arranged in a sinusoidal waveform in the width direction of the blade body. cloth; the protrusions are in a zigzag-like structure, and the sharp corners of the zigzag-like structure are all facing the trailing edge of the blade body; the protrusions in the zig-zag structure include a first side wall and a second side wall; the first side wall and the The second side wall forms a certain angle at the intersection. A rotor drone is also disclosed, and the rotor drone includes the above-mentioned silent blades. The beneficial effects of the invention are: good noise reduction effect, expanded use range, improved efficiency and flying speed of the drone.

Description

technical field [0001] The invention relates to the field of unmanned aerial vehicles, in particular to a silent blade and a rotor unmanned aerial vehicle containing the same. Background technique [0002] In today's society, as the technology of UAVs is getting more and more advanced, it can be seen in more and more occasions, such as military reconnaissance, assisting anti-terrorism, etc. UAVs have played a great role, reducing unnecessary losses and improving success rate. But in some cases, its noise problem has brought hidden dangers to its safety, such as the incident where a drone was discovered and shot down in military reconnaissance. The reason why drones are discovered is largely due to their relatively large noise, low-altitude flight, small size, and difficult to be detected by radar, but noise restricts their safety. In response to such problems, countries all over the world are now setting off an upsurge of research on low-noise drones. [0003] The noise o...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a silent blade and a rotor UAV containing it, so as to solve the technical problems of high noise and slow flight speed in the prior art

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