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Resistance-and-reactance-compounded exhaust silencer

A technology of exhaust muffler and resistance muffler, applied in muffler devices, machines/engines, engine components, etc., can solve the problems of increased cost investment, short service life, waste of manpower, material and financial resources, etc. High, medium and low frequency noise, stable structure, smooth exhaust effect

Active Publication Date: 2011-11-02
湖南省力宇燃气动力有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the exhaust silencing effect of the exhaust muffler of the large internal combustion unit is not ideal. The overall structure of the gas muffler is not easy to deform under the working environment of high pressure, strong vibration and high temperature; As a result, a lot of manpower, material resources and financial resources were wasted in the replacement of sound-absorbing materials; in addition, due to the poor sound-absorbing effect, two silencers are usually used to enhance the sound-absorbing effect, resulting in increased cost input

Method used

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  • Resistance-and-reactance-compounded exhaust silencer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An impedance composite exhaust muffler of this embodiment is as follows: figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 As shown, it includes a resistive muffler and a resistive muffler, the resistive muffler is connected to the resistive muffler, and a third fixing ring 1 is arranged between the resistive muffler and the resistive muffler; the resistive muffler consists of the first The small head 2, the resonance tube 3, the second small head 4, the first fixed ring 5 and the second fixed ring 6, the first small head 2 includes a head with a large inner diameter and a head with a small inner diameter, and the second small head 4 includes an inner diameter The big end and the small inner diameter end, the first small head 2 with the small inner diameter and the second small head 4 with the small inner diameter are respectively the same as the inner diameter of the resonance tube 3, and the first small head 2 with the smaller inner diameter is connected to...

Embodiment 2

[0040] An impedance composite exhaust muffler, the difference between this embodiment and Embodiment 1 is that it is also provided with a muffler shell 12, a resonance tube 3, a second small head 4, an inner liner pipe 7 and a third small head 11 are placed inside the muffler shell 12. The provided muffler shell 12 can play the role of modifying the appearance, strengthening the anti-vibration ability and better fixing other components of the whole impedance composite exhaust muffler.

[0041] As a preferred embodiment, a first end panel 13 and a second end panel 14 are also provided, the first end panel 13 is fixed on one end of the muffler housing 12, and the second end panel 14 is fixed on the end of the muffler housing 12. the other end. The provided first end panel 13 and second end panel 14 prevent air flow and sound waves from entering the gap between the muffler casing 12 and the resistant muffler pipe, and can also play a role of strengthening and fixing.

[0042] A...

Embodiment 3

[0046] An impedance composite exhaust muffler, the difference between this embodiment and Embodiment 1 is that there are two or more than two sound-absorbing block shells 8, and correspondingly, it is made of ultra-fine glass fiber and high-temperature rock wool. There are two or more sound-absorbing blocks 9 of fireproof materials. In this embodiment, the preferred solution is: there are six sound-absorbing block shells 8, and correspondingly, there are six sound-absorbing blocks 9 made of porous fireproof material made of ultra-fine glass fiber and high-temperature rock wool. Six sound-absorbing blocks 9 made of ultra-fine glass fiber and high-temperature rock wool porous fireproof material are vertically arranged from top to bottom inside the liner pipe 7, which can enhance the sound-absorbing effect and ensure smooth exhaust.

[0047] The resistive muffler is also provided with an air outlet pipe 17, and one end surface of the air outlet pipe 17 is connected to an end surf...

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Abstract

The invention relates to the field of exhaust silencing equipment, in particular to a resistance-and-reactance-compounded exhaust silencer. The resistance-and-reactance-compounded exhaust silencer comprises a reactance silencer and a resistance silencer, wherein the reactance silencer consists of a first concentric reducer, a resonance tube, a second concentric reducer, a first fixing ring and a second fixing ring; the inner wall of the reactance silencer is provided with a high temperature-resisting material layer which is made of porous boiler steel; the resistance silencer comprises a lining tube, a silencing block shell, a silencer block which is made of a porous fireproof material prepared from an ultra-thin glass fiber and high temperature rock wool, a fixing plate and a third concentric reducer; and the silencing block is arranged inside the silencing block shell. Compared with the prior art, the resistance-and-reactance-compounded exhaust silencer is characterized in that: theresistance-and-reactance-compounded exhaust silencer can works in a high temperature environment, has a firm structure and is difficult to deform; high, intermediate and low frequency noise which is generated by an internal-combustion engine set can be effectively and greatly reduced; and the smooth exhaust of the internal-combustion engine set can be maintained, and the like.

Description

technical field [0001] The invention relates to the field of exhaust muffler equipment, in particular to an impedance composite exhaust muffler. Background technique [0002] The muffler is a noise reduction device installed on the airflow passage of aerodynamic equipment (such as internal combustion engines, blowers and air compressors) or in the intake and exhaust systems. Mufflers can block the propagation of sound waves and allow airflow to pass through, which is an effective tool for noise control. [0003] There are many types of mufflers, but in terms of their muffler mechanism, they can be divided into six main types, namely resistive mufflers, resistive mufflers, impedance composite mufflers, micro-perforated plate mufflers, and small hole mufflers. Mufflers and Active Mufflers. [0004] The resistive muffler mainly eliminates high-frequency noise. It uses the sound-absorbing effect of sound-absorbing materials to continuously absorb and gradually attenuate the no...

Claims

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Application Information

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IPC IPC(8): F01N1/02F01N1/08
Inventor 王跃峰邓海军冯万明陈颜旷海中阮静
Owner 湖南省力宇燃气动力有限公司
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