A kind of muffler of multi-stage compound noise reduction and preparation method thereof

A muffler and muffler cover technology, which is applied in the direction of mufflers, mechanical equipment, machines/engines, etc., can solve the problems of rough production quality, low productivity, and unsightly appearance, so as to reduce interference and damage, increase productivity, and improve appearance quality Effect

Active Publication Date: 2016-05-11
扬州新扬通风设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. The existing diesel muffler adopts oxyacetylene welding process, the production quality is rough, the appearance is not beautiful enough, and the productivity is relatively low

Method used

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  • A kind of muffler of multi-stage compound noise reduction and preparation method thereof
  • A kind of muffler of multi-stage compound noise reduction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, it is a multi-stage composite sound-absorbing muffler according to this embodiment, including a pipe joint 1, a sound-absorbing cover 2, a lower casing 3, an upper casing 4, a sound-absorbing net 5, an exhaust pipe 6 and a sound-absorbing material 7, The pipe joint 1 is connected to the exhaust elbow on the cylinder head of the engine, and the muffler cover 2 and the lower housing 3 are respectively connected to the pipe joint 1. There are small holes on the side wall of the muffler cover 2, The lower casing 3 is connected to the upper casing 4, the noise reduction net 5 is fixed between the upper casing 4 and the lower casing 3, and the upper casing 4 is located on the noise reduction mesh 5 above, the lower housing 3 is located below the silencing net 5, the silencing net 5 is convex to the direction of the silencing cover 2, the silencing net 5 has small holes arranged in high density, and the exhaust The pipe 6 is necked and connected to ...

Embodiment 2

[0044] Such as figure 2 As shown, the preparation method of a multi-stage composite sound-absorbing muffler according to this embodiment includes the following steps:

[0045]S1: Prepare pipe joints, mufflers, lower shells, upper shells, mufflers and exhaust pipes respectively;

[0046] S2: riveting the noise reduction cover to the pipe joint;

[0047] seam-welding the lower shell to the pipe joint;

[0048] Put the sound-absorbing net on the lower shell, with the convex facing the direction of the sound-absorbing cover, place the upper shell, and rivet the upper shell and the lower shell;

[0049] seam-welding the exhaust pipe to the nozzle constriction of the upper casing;

[0050] S3: Conduct quality inspection after spraying the anti-rust layer, and package the product after passing the test.

[0051] The preparation method of the muffler with multi-stage compound noise reduction described in this embodiment uses the riveting and rolling welding process instead of the...

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PUM

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Abstract

The invention discloses a multistage composite silencing silencer. The multistage composite silencing silencer comprises a pipe joint, a silencing cover, a lower shell, an upper shell, a silencing net, an exhaust pipe and sound absorbing materials. By arranging four stages of silencing chambers with ventilation net section area which is gradually increased, the silencing cover and the silencing net with alternating large and small holes for silencing and the sound absorbing materials for composite silencing, noises can be reduced by 20-25 decibels, the noises beside ears become gentle from harsh, high, medium and low hearable components in audio spectra are obviously decreased and interference and harm to people are reduced. The invention additionally provides a preparation method of the multistage composite silencing silencer. Riveting and roll welding processes are used for replacing an oxyacetylene welding process, the quality reliability is high, the appearance quality is obviously improved and the corresponding productivity is improved by 1-2 times.

Description

technical field [0001] The invention relates to a muffler, in particular to a multi-stage composite muffler and a preparation method thereof. Background technique [0002] The muffler is a device that prevents sound transmission and allows airflow to pass through, and is an important measure to eliminate aerodynamic noise. A device installed at the engine exhaust port to reduce noise. [0003] Existing diesel muffler is made up of inlet pipe joint, one-stage amplification muffler chamber, exhaust pipe (same diameter as inlet pipe). [0004] Existing diesel mufflers have the following deficiencies: [0005] 1. The combustion and work process of the diesel engine is rough, and the noise reduction effect of the first-stage amplification silencer cavity of the diesel engine is poor. The noise of "jumping, jumping, jumping" and its high decibel value are unbearable, so the traffic control department stipulates that agricultural transport vehicles, tractors, and walking tractor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N1/10F01N13/18
Inventor 杨运勤
Owner 扬州新扬通风设备有限公司
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