The invention relates to the technical field of unmanned aerial vehicles, in particular to a bionic noise reduction unmanned aerial vehicle propeller which comprises a blade and an axis part, the blade is provided with a windward front edge and a rear edge opposite to the front edge, one end of the blade is a propeller blade, the other end of the blade is a propeller root, and the outer ends of the propeller blade and the propeller root are propeller tips. The paddle tip extends outwards along a spiral tangent line to form a wing edge part in a spanwise paddle shape, and the outer edge of the wing edge part is provided with a straight line section which is inclined outwards. The blade shape structure of the propeller is designed, the pneumatic load moves in the inner diameter direction along the peak value distributed in the spanwise direction, and in order to reduce the Mach number of the blade tip, the blade tip of the propeller blade is provided with the wing edge part in the shape of the blade in the spanwise direction; therefore, the sound power of noise is distributed in the radial direction, and air ripped by the propeller smoothly transits from the tail end of the wing edge part in an advection manner from the bionic angle, so that the noise reduction effect is achieved.
本发明涉及无人机技术领域,尤其为一种仿生降噪的无人机螺旋桨,包括叶片和轴心部,叶片具有迎风的前缘和与所述前缘相对的后缘,所述叶片的一端为桨叶,另一端为桨根,所述桨叶、桨根的外端为桨尖,述桨尖端沿螺旋切线延伸向外形成呈沿展向桨叶形状的翼边部,翼边部外缘设置呈斜向外的直线段。本发明通过设计螺旋桨的叶片形状结构,将气动负载沿展向分布的峰值向内径方向移动,并且为了降低叶尖马赫数对螺旋桨叶片桨尖设置呈沿展向桨叶形状的翼边部,从而从噪声的声功率沿径向分布以仿生学角度讲螺旋桨划开的空气从翼边部尾端顺利平流过渡,从而实现降噪效果。
Bionic noise reduction unmanned aerial vehicle propeller
一种仿生降噪的无人机螺旋桨
2023-05-16
Patent
Electronic Resource
Chinese
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