Spiral device for flight and unmanned aerial vehicle
A technology of propellers and propellers, applied in the field of propellers and unmanned aircraft, to achieve good noise reduction effect
Pending Publication Date: 2021-11-26
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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[0002] In related technologies, the commercial market of small multi-rotor aircraft has grown rapidly in the past few years, providing effective solutions for image capture, smart transportation and smart agriculture. However, the aerodynamic noise of drones is a constraint in some occasions. A key factor in its application
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[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0026] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific ...
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The invention discloses a spiral device for flying and an unmanned aerial vehicle, the spiral device comprises a propeller hub and a propeller, one end of the propeller is fixedly connected to the propeller hub and extends along the radial direction of the propeller hub, and the propeller hub is used for being connected with an external driving mechanism; the propeller is provided with a front edge, the front edge is provided with a plurality of sine sawtooth structures with different wavelengths in the length direction of the front edge, each sine sawtooth structure is sequentially divided into a plurality of sawtooth parts in the length direction of the sine sawtooth structure, the two ends of each sawtooth part are the wave trough positions of the sine sawtooth structures, and the sawtooth parts with the different wavelengths are sequentially connected in a staggered mode. And a trough is formed between two adjacent sawtooth parts with different wavelengths. At the positions of the troughs, when the sawtooth parts with the two wavelengths act on the turbulent vortexes due to different shapes, the time spent on convection of the turbulent vortexes among the troughs is different, and phase difference is caused, so that the two sawtooth parts at the positions of the troughs enable a noise source to destructively interfere, and a better noise reduction effect is achieved.
Description
technical field [0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a screwdriver and an unmanned aerial vehicle for flying. Background technique [0002] In related technologies, the commercial market of small multi-rotor aircraft has grown rapidly in the past few years, providing effective solutions for image capture, smart transportation and smart agriculture. However, the aerodynamic noise of drones is a constraint in some occasions. A key factor for its application. In order to meet the low noise requirements of small multi-rotor aircraft, it is more and more important to design the noise reduction of the propeller. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a screwdriver and an unmanned aircraft for flying, which can reduce the noise generated when the screwdriver is in use. [0...
Claims
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IPC IPC(8): B64C27/32B64C27/473B64C27/14
Inventor 李鹏宇杨延年刘宇
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA