Sound absorption device and wheel with sound absorption device

A sound-absorbing device and wheel technology, applied in the direction of wheels, rims, sound-producing equipment, etc., can solve the problems of increasing sound absorption, narrow sound absorption frequency band, difficulty in low-frequency sound absorption, etc., and achieve high sound absorption and sound absorption frequency. The effect of bandwidth, effective sound absorption
CN110808022APending Publication Date: 2020-02-18CITIC DICASTAL
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CITIC DICASTAL
Publication Date
2020-02-18

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Abstract

The invention relates to a sound absorption device and a wheel with the sound absorption device. The sound absorption device (10) is constructed into a box body in a rectangular hexahedron shape, anda porous double-layer Helmholtz resonance sound absorption structure is formed; meanwhile, the sound absorption device (10) in a box body form forms a structure resonance sound absorption device by the self; and the first-order inherent mode frequency is identical to the first-order inherent mode frequency of a wheel air chamber (30). When the box type sound absorption structure provided by the invention is assembled in the wheel, the function of duplex absorption of wheel air chamber sound resonance by organically combining the Helmholtz resonance sound absorption and the structure resonancesound absorption can be realized.
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Description

technical field

[0001] The invention relates to a sound absorbing device and a wheel with the sound absorbing device, in particular to an automobile wheel equipped with pneumatic tires. Background technique

[0002] During the normal running of the wheel, the excitation of the road to the wheel and the excitation of the axle to the wheel caused by the unbalanced wheel rotation can both excite the air chamber in the wheel to generate acoustic resonance, and the resonance is transmitted to the body through the axle and suspension system structure, which in turn radiates noise into the vehicle interior. Its noise characteristics are mainly low-frequency and narrow-band, and its magnitude is relatively high. It creates noise interference to the riding environment in the car and needs to be effectively controlled.

[0003] Currently, there are numerous studies and patents providing methods for effectively controlling this acoustic resonance. This method mainly adopts the princi...

Claims

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