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Double-cavity resonant type muffler

A muffler and resonant cavity technology, applied in the direction of pipe components, mechanical equipment, pipes/pipe joints/pipe fittings, etc., can solve the problem of single frequency range, etc., achieve the effects of suppressing noise, improving space utilization, and good noise reduction effect

Inactive Publication Date: 2013-05-01
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main disadvantage of the traditional resonant muffler is that it only has a muffler effect for sound waves whose frequency is near its natural frequency, and the frequency range is single

Method used

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  • Double-cavity resonant type muffler
  • Double-cavity resonant type muffler
  • Double-cavity resonant type muffler

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Embodiment Construction

[0029] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0030] figure 2 It is a structural schematic diagram of the present invention, image 3 It is the transmission loss diagram of the example of the present invention, as shown in the figure: the dual-cavity resonance muffler provided by the present invention includes a main pipe, a side branch pipe, an upper resonant cavity and a lower resonant cavity; the upper resonant cavity and the lower resonant cavity are connected in series The method is set on the side branch pipeline connected to the main pipeline.

[0031] The upper resonance cavity is connected with the main pipeline through a side branch pipeline.

[0032] The lower resonant cavity is connected with the upp...

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Abstract

The invention discloses a double-cavity resonant type muffler, which relates to a double-cavity resonant type muffler for inhibiting pipeline noises, and is formed by connecting an upper resonant cavity with a lower resonant cavity in series, wherein the upper cavity is connected with a main pipeline through a branch pipeline; and the upper cavity is connected with the lower cavity through a pipeline or an opening hole on a clapboard. The double-cavity resonant type muffler is adopted to inhibit the pipeline noises, so that two noise elimination peak values can be generated in a low-frequency range, a favorable noise elimination effect is achieved, and the noises spread in the pipelines can be effectively inhibited. Meanwhile, the double-cavity resonant type muffler also fully utilizes an original idle space around the branch pipe, so that the space utilization ratio of the resonant type muffler is improved.

Description

technical field [0001] The invention relates to the field of pipeline noise, in particular to a muffler for suppressing pipeline noise. Background technique [0002] The traditional resonance muffler is a commonly used device for suppressing pipeline noise. figure 1 It is a schematic diagram of the structure of a traditional resonance muffler. As shown in the figure, the structural form of the resonance muffler is: the main pipe is connected to the Helmholtz resonance cavity (that is, the closed cavity 11) through a branch pipe or an opening. The basic principle of the resonance muffler is the same as that of the Helmholtz resonator: the air column in the pipe or opening is similar to a piston and has a certain sound quality; the closed cavity is similar to an air spring, and the two form a resonance system. When the sound wave reaches the neck, the air column vibrates under the action of the sound wave, and the frictional damping during the vibration converts part of the s...

Claims

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Application Information

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IPC IPC(8): F16L55/033
Inventor 邓兆祥张杨王攀卫凯凯乔同超杨学新王志伟鲁俊
Owner CHONGQING UNIV
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