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Sound insulating device for four-rotor aircraft

A technology of four-rotor aircraft and sound insulation device, which is applied in aircraft, rotorcraft, transportation and packaging, etc., can solve the problems of high cost, high equipment quality, complex active noise reduction technology, etc., and achieve the effect of reducing disturbance and meeting requirements

Pending Publication Date: 2018-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (2) It takes a lot of manpower, material and financial resources to study the length and shape of propeller blades
[0009] (3) Increasing the number of propeller blades will increase the design difficulty of the control system
[0010] (4) The active noise reduction technology is more complicated, and at the same time, the cost is high, and the quality of the equipment is large, which will reduce the load capacity of the quadrotor aircraft

Method used

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  • Sound insulating device for four-rotor aircraft
  • Sound insulating device for four-rotor aircraft
  • Sound insulating device for four-rotor aircraft

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Embodiment Construction

[0032] The present invention will be further elaborated and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of the various implementations in the present invention can be combined accordingly on the premise that there is no conflict with each other.

[0033] like figure 1 As shown, the quadrotor aircraft sound insulation device in this embodiment can be used to reduce the noise produced by the quadrotor aircraft. The sound insulation device includes four sound insulation covers 1 and four connecting arms 2 . There are four criss-cross brackets 3 on the quadrotor aircraft body, and propellers and motors are installed at the ends of the brackets 3, which are the main source of aircraft noise. A soundproof cover 1 is respectively fixed at the end of each support 3 through a horizontal connecting arm 2 , the axis of the connecting arm 2 is coaxial with the axis of the support 3 , which is equivalent to the extensio...

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Abstract

The invention discloses a sound insulating device for a four-rotor aircraft. The sound insulating device for the four-rotor aircraft mainly comprises a connecting arm part and a sound insulating coverpart. The sound insulating device for the four-rotor aircraft can absorb and reflect propeller noises generated by rotors. The connecting arm is a light high-strength structure made of an aluminium product or a plastic product. 1 / 4 of the spherical sound insulating cover is fixed by one end of the connecting arm. The sound insulating cover is formed by three layers of materials which are glass wool, damping paint and aluminium plate in sequence from inside to outside; and by selecting appropriate sound absorbing materials, the noise absorbing capacity of the sound insulating cover can be improved. As the sound insulating cover has certain distances from the rotors, the noise is reduced on the premise of reducing interference to rotor flow fields.

Description

technical field [0001] The invention discloses a sound insulation device for a quadrotor aircraft, in particular to a sound insulation device installed near the rotor and capable of reducing the overall noise of the quadrotor aircraft. Background technique [0002] Nowadays, micro-rotor aircraft in the drone family are widely used in search and rescue, photography, etc., and the express delivery industry is likely to be the future development direction of rotor aircraft. However, excessive noise is a common problem in existing rotorcrafts, and may affect the development of future rotorcrafts. [0003] Specifically, the UAV noise is mainly composed of its motor noise and propeller noise. Among them, the motor noise is mainly the motor bearing noise; the propeller noise can be further divided into rotating noise and broadband noise. [0004] At present, for the noise of motor bearings, the commonly used noise reduction methods are to improve the bearing design, improve the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C27/20B64C1/40
CPCB64C1/40B64C27/20
Inventor 刘涛王方锦华
Owner ZHEJIANG UNIV
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