The ducted unmanned aerial vehicle noise reduction device is characterized in that the ducted unmanned aerial vehicle noise reduction device comprises a ducted noise reduction structure and a supporting structure, the ducted noise reduction structure comprises an outer duct and an inner duct, the outer duct comprises an outer duct back plate, an outer duct cavity and an outer duct bent micro-perforated plate acoustic liner, and the supporting structure comprises an inner duct back plate and an outer duct bent micro-perforated plate acoustic liner. The inner duct comprises an inner duct back plate, an inner duct cavity and an inner duct bent micro-perforated plate acoustic liner, and the inner duct is placed in the outer duct and connected with the outer duct through a supporting structure. The supporting structure comprises a supporting strip and a supporting seat, the supporting strip is connected with the bottom of the outer duct, and the supporting seat is located at the central axis of the outer duct and connected with the inner duct. Due to the fact that the outer duct and the inner duct form a noise reduction structure based on the bent micro-perforated plate acoustic liner, most of motor noise and noise generated during rotation of the propeller can be effectively absorbed, and the noise reduction function is achieved. On the premise that the weight and the size are not increased too much, the purpose of reducing the noise of the propellers and the motors of the ducted unmanned aerial vehicle is achieved, and good application value is achieved.
本发明公开了一种基于弯曲微穿孔板声衬的涵道无人机降噪装置,其特征在于,包括:涵道降噪结构和支撑结构,所述涵道降噪结构包括外涵道和内涵道,所述外涵道包括外涵道背板、外涵道空腔和外涵道弯曲微穿孔板声衬,所述内涵道包括内涵道背板、内涵道空腔和内涵道弯曲微穿孔板声衬,且内涵道放置于外涵道内部,并通过支撑结构相连。所述支撑结构包括支撑条和支撑座,所述支撑条与外涵道底部连接,所述支撑座位于外涵道中轴线处,并与内涵道连接。由于外涵道和内涵道形成基于弯曲微穿孔板声衬的降噪结构,因而能有效吸收大部分电机噪声和螺旋桨旋转时产生的噪声,达到降噪功能。本发明在不增加过多重量和体积的前提下,达到降低涵道无人机螺旋桨和电机噪声的目的,具有良好的应用价值。
Ducted unmanned aerial vehicle noise reduction device based on bent micro-perforated plate acoustic liner
一种基于弯曲微穿孔板声衬的涵道无人机降噪装置
2024-12-31
Patent
Electronic Resource
Chinese