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Broadband multi-cavity resonance-type air intake muffler and working method thereof

A technology of intake muffler and working method, which is applied in the field of vehicle parts, can solve the problems of large volume, narrow muffler frequency band, and difficult installation, and achieve the effect of small volume, small intake back pressure, and easy processing

Inactive Publication Date: 2016-10-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention aims at the shortcomings of most existing tractor air intake systems without mufflers and existing air intake mufflers with narrow muffler frequency band, large volume, and difficult installation. The principle of multi-cavity resonance noise reduction, a broadband multi-cavity resonance type intake muffler and its working method are proposed

Method used

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  • Broadband multi-cavity resonance-type air intake muffler and working method thereof
  • Broadband multi-cavity resonance-type air intake muffler and working method thereof
  • Broadband multi-cavity resonance-type air intake muffler and working method thereof

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Embodiment

[0036] Such as figure 1 and figure 2 As shown, an embodiment of the present invention includes connecting flange 1, flange 1 is welded with perforated pipe 5, perforated pipe 5 is welded with cylindrical muffler shell 2, and the first weld between the left side of muffler shell 2 and perforated pipe 5 Cavity partition 3; the second chamber partition 4 is welded between the right side of the muffler shell 2 and the perforated pipe 5; the left part of the perforated pipe 5 is circumferentially arranged with the first chamber muffler through-hole 6; the middle part of the perforated pipe 5 The second chamber muffler through-holes 7 are arranged circumferentially; the third chamber muffler through-holes 8 are arranged circumferentially on the right side of the perforated pipe 5 .

[0037] In this embodiment, the intake muffler housing 2, the first chamber partition 3 and the perforated pipe 5 constitute the first resonance chamber of the intake muffler; the muffler housing 2, th...

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Abstract

The invention discloses a broadband multi-cavity resonance-type air intake muffler. The broadband multi-cavity resonance-type air intake muffler comprises a penetrating cylindrical muffler shell, wherein a perforated tube is connected with the interior of the muffler shell in a penetrating manner; an inner cavity is formed between the muffler shell and the perforated tube; a plurality of partition plates are arranged in the inner cavity in the direction perpendicular to the axis; the inner cavity is divided by the partition plates into a plurality of resonant cavities; and a plurality of lines of noise-eliminating through holes which are distributed circumferentially are formed in the perforated tube, and correspondingly positioned at the middles of the resonant cavities. The broadband multi-cavity resonance-type air intake muffler disclosed by the invention is wide in noise-eliminating frequency band, large in noise-eliminating amount, small air intake backpressure, low in engine power loss, small in size, light in weight, simple in structure, convenient to mount, and easy to machine, and has the advantages that engineering is easy to achieve and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of vehicle components, in particular to an air intake system of a diesel engine, in particular to a wide-band multi-cavity resonance air intake muffler for a tractor engine and a working method thereof. Background technique [0002] With the increasingly strict noise emission standards for agricultural machinery, noise emission has become an issue that has received more and more attention in the production process of agricultural machinery. Agricultural machinery engines are generally diesel engines, which have more serious noise emission problems than gasoline engines. Since the muffler is rarely installed in the tractor air intake system, the intake noise becomes one of the most important noise sources. Therefore, in order to reduce the intake noise, it is very necessary to install the intake muffler. [0003] After searching, most of the intake muffler is a square structure with a single resonant cavity...

Claims

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Application Information

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IPC IPC(8): F02M35/12
CPCF02M35/12F02M35/1216F02M35/1266
Inventor 李舜酩程春谭延峥冷峻张宗振
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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