Equilateral wedge-shaped composite muffler

A muffler and wedge-shaped technology, applied in the field of side wedge-shaped composite mufflers, can solve the problem that the muffler is difficult to meet the requirements of large air volume, high noise and noise reduction, and achieve the effect of ensuring the emission

Pending Publication Date: 2020-03-13
XIAMEN JIADA OF ACOUSTIC TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing mufflers are difficult to meet the noise reduction requirements of large air volume and high noise level

Method used

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  • Equilateral wedge-shaped composite muffler
  • Equilateral wedge-shaped composite muffler
  • Equilateral wedge-shaped composite muffler

Examples

Experimental program
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Embodiment Construction

[0018] exist figure 1 , 2 , In the embodiment shown in 3 and 4, an equilateral wedge-shaped composite muffler includes a muffler shell (1), an inlet wind muffler structure (2), an equilateral wedge-shaped sound absorber (3), an outlet wind muffler Acoustic Structure (4). The muffler shell (1) includes a supporting steel structure (11), a shell steel plate (12), an inner sound-absorbing structure (13), an outer reinforcing rib, an outer sound-insulating decorative module (14), and a double pouring ceiling on the top (15 ); the shell of the equilateral wedge-shaped sound absorbing body (3) is a composite pinhole aluminum sound-absorbing panel (31), the top is arc-shaped (32), the bottom is a rectangular steel plate groove frame (33), and the steel plate groove frame (33 ) is connected to the load-bearing steel structure (35) by installing fasteners (34), no sound-absorbing material is provided inside, the distance between the bottoms of the equilateral wedge-shaped sound-abso...

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Abstract

The invention discloses an equilateral wedge-shaped composite muffler. The equilateral wedge-shaped composite muffler comprises a muffler shell body, an arc-shaped air inlet silencing elbow, equilateral wedge-shaped sound absorbing bodies and an air outlet silencing structure. The muffler shell body comprises a supporting steel structure, a shell body steel plate, an internal sound absorption structure, an external reinforcing rib, an external sound insulation and decoration module, and a double water pouring ceiling at the top of the muffler shell body; the shells of the equilateral wedge-shaped sound absorbing bodies are composite pinhole aluminum sound absorption plates, the tops are arc-shaped, the bottoms are rectangular steel plate groove frames, the steel plate groove frames are connected with bearing steel structures through installation fasteners, no sound absorption material is arranged inside, the spacing between the bottoms of the equilateral wedge-shaped sound absorbing bodies is the same, the long side of the steel plate groove frame is the same as the length of the two short sides and one spacing, and a silencing unit with a square bottom is formed by two adjacent equilateral wedge-shaped sound absorbing bodies; and the air outlet silencing structure comprises an I-shaped sound absorbing body, a cross-shaped sound absorbing body, a supporting bottom plate and a rainproof shutter.

Description

technical field [0001] The invention relates to the technical field of noise reduction for noise control, in particular to an equilateral wedge composite muffler capable of effectively eliminating the large air volume and high noise level of a large high-pressure centrifugal fan. Background technique [0002] The noise level of the high-pressure fan is high, and the noise spectrum is a broadband noise dominated by medium and low frequencies. Due to the strong penetrating power of low-frequency noise, poor directivity and strong diffraction ability. In the ventilation system of various occasions, the fan is usually the most basic noise source. As the power source of the smoke and air system of an industrial enterprise, the fan plays a very important role, but at the same time, the noise of the fan is also a large part of the noise of the industrial enterprise. The International Organization for Standardization promotes 85dB(A) as the hearing loss standard. Our country stipul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66
CPCF04D29/663F04D29/664
Inventor 宋继萍林嘉祥
Owner XIAMEN JIADA OF ACOUSTIC TECH CO LTD
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