Structure and operation method of multi-axis aircraft with different propellers

Abstract

The invention discloses a structure and an operation method of a different-propeller multi-axis aircraft, which includes two types of propellers, and corresponding power speeds also have two types. The specific principle is that the two symmetrical powers located on the nozzle are high-speed powers, and the propellers matched with them are small propellers with larger pitch and smaller size. The power and propellers of other shafts are large propellers with low speed power and small pitch and large size. The advantage is that a small propeller is matched with high-speed power, and a large propeller is matched with low-speed power. Under the same circumstances, high-speed power rotates faster, and the airflow velocity generated is also significantly faster than that produced by low-speed power. At the same time, the size of the propeller is reduced and the distance between it and other propellers is widened to reduce the mutual turbulence, which is more conducive to the downward movement of the droplets, so that the droplets ejected from the nozzle under the high-speed power are driven downward by the high-speed airflow Blow away for better penetration.

Description

technical field [0001] The technology relates to the technical field of aircraft power configuration, relates to a structure of a multi-axis aircraft with different propellers, and in particular relates to a mechanism and an operation method of a multi-rotor plant protection unmanned aerial vehicle. Background technique [0002] Multi-axis aircraft, that is, multi-rotor UAV, has multiple propellers, and multiple propellers are controlled by multiple power mechanisms to achieve flight. It is widely used in various fields such as aerial photography, monitoring, search and rescue, resource exploration, and agriculture. It has a small size , light weight, low cost, flexible operation and high safety. [0003] At present, the propellers used by all multi-rotor aircrafts have almost the same height and structure on the same machine. Therefore, the downward airflow speeds generated between the propellers are almost the same. For plant protection, the drone used to spray crops spra...

AI Technical Summary

Problems solved by technology

According to the theory of propeller slices, also known as vortex theory, since a vortex is formed around the propeller during rotation, the adjacent propellers rotate in the opposite direction, and the vortex generated is also opposite, which will cause the problem of turbulence. Part of the water mist will be rolled up to the top of the aircraft, which is not conducive to penetrating downward

[0004] The nozzles of the plant protection UAVs in the prior art are usually installed under the propellers. For example, the authorized announcement number is CN204527638U, and the patent name is "Coaxial Reverse Propeller Multi-axis Plant Protection UAV". The nozzles are installed on the arms. , the whole is located under the propeller, so that during the flight of the aircraft, the propeller rotates. Since the propellers are the same size, the adjacent propellers rotate in opposite directions, and the reverse vortex generated will interfere with the downward spraying direction of the liquid from the nozzle. Not conducive to downward penetration

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