Different-propeller multi-axis aircraft structure and operation method

Abstract

The invention discloses a different-propeller multi-axis aircraft structure and an operation method. The aircraft structure comprises two types of propellers and has two types of corresponding power rotating speeds. The specific principle of the different-propeller multi-axis aircraft structure is as follows: two symmetric powers located on a spray nozzle are high-speed powers, and the propellers matched with the powers are small propellers with the higher pitch and smaller size. Low-speed power and large propellers with small pitch and large size are adopted for other axes. The aircraft structure has the advantages that the high-speed power rotating speed of the small propellers matched with high-speed powers is higher than that of the large propellers matched with low-speed powers under the same condition, and the airflow speed produced by the high-speed powers is obviously higher than that produced by low-speed powers. The distances between the propellers with the reduced size and other propellers are enlarged, mutual turbulence is reduced, downward movement of fog drops is facilitated, fog drops sprayed by the spray nozzle below the high-speed powers is blown downwards under the drive of high-speed airflow, so that better penetrating power is obtained.

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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