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Silencer with resonant cavity

A noise reduction device and resonant cavity technology, applied in the direction of intake mufflers, etc., can solve the problems of increased number of parts, large space occupied by resonators, complex pipeline structure, etc., and achieve the effect of fewer parts

Inactive Publication Date: 2014-03-12
MANNHUMMEL FILTER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second air line leads directly to the internal combustion engine via an air outlet in the housing. A disadvantage of this known resonator is also that the resonator takes up a lot of space.
[0005] It can be seen that at present, the traditional resonant cavity cannot realize the sharing of the resonant cavity when there are only two parts and the main pipeline is shared by different engines.
The traditional structure makes the pipeline structure very complicated and the number of parts will increase greatly

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0035] A noise reduction device provided with a resonant cavity, the structure of which is as follows: Figure 1-6 As shown, the muffler device is composed of an upper cover 1 and a main pipe 2, and the upper cover 1 and the main pipe 2 are connected by welding or clamping. The upper cover 1 is divided into the upper cavity 11 of the upper cover and the lower cavity 12 of the upper cover through the horizontal partition. The height is less than the height of the lower end cavity 12 of the loam cake, and the contact part of the main pipe 2 and the loam cake 1 is provided with a longitudinal long pipe 21, a sound-absorbing hole 22, a partition and a longitudinal short pipe 23.

[0036] In this embodiment, the cavity 12 at the lower end of the upper cover is welded to the main pipeline 2, and the cavity 12 at the upper end of the upper cover is divided into a quarter-wavelength cavity 121, a porous resonant cavity 122, a Hertz The resonant cavity 123 and the porous resonant cavi...

Embodiment 2

[0039] A noise reduction device provided with a resonant cavity, its structure is as follows Figure 7-11 As shown, the muffler device is composed of an upper cover 1 and a main pipe 2, and the upper cover 1 and the main pipe 2 are connected by welding or clamping. The upper cover 1 is divided into the upper cavity 11 of the upper cover and the lower cavity 12 of the upper cover through the horizontal partition. The height is less than the height of the lower end cavity 12 of the loam cake, and the contact part of the main pipe 2 and the loam cake 1 is provided with a longitudinal long pipe 21, a sound-absorbing hole 22, a partition and a longitudinal short pipe 23.

[0040] In this embodiment, the cavity 11 at the upper end of the upper cover is clamped and connected to the main pipeline 2, and the cavity 11 at the upper end of the upper cover is divided into a quarter-wavelength cavity 111, a porous resonant cavity 112, a Herm Hertz resonant cavity 113 and porous resonant c...

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Abstract

The invention relates to a silencer with a resonant cavity. The silencer with the resonant cavity is composed of an upper cover (1) and a main pipeline (2), wherein the upper cover (1) and the main pipeline (2) are fixedly connected, the upper cover (1) is transversely cut off to be divided into an upper cover upper end cavity (11) and an upper cover lower end cavity (12), the upper cover upper end cavity (11) and the upper cover lower end cavity (12) are longitudinally cut off to be divided into different spaces, and one or more sorts of long longitudinal pipes (21), noise elimination holes (22) and partition walls or short longitudinal pipes (23) are arranged at the positions, making contact with the upper cover (1), of the main pipeline (2). Compared with the prior art, the silencer with the resonant cavity can be used in trolleys with different types of engines in the same platform and with different noise elimination functional requirements, and the serialization purpose can be achieved.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a noise reduction device provided with a resonant cavity. Background technique [0002] Acoustic energy is generated when fresh air is drawn into the internal combustion engine through the intake line. Vibrations are caused in the suction line by the supplied air, which leads to undesired sounds. It is known to use various types of resonators, such as Helm Hertz resonators, to reduce the intake noise of internal combustion engines. The resonator reduces vibration by causing the air in the resonator to resonate with the vibrating intake air. [0003] DE60017075T2 discloses a resonator. This type of resonator mainly consists of a housing which encloses a large-volume resonant cavity. The resonant cavity communicates with the air intake pipeline of the air intake system of the automobile internal combustion engine through the air pipeline. Via this air line, part of the volume flow o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/12
Inventor 吴春保
Owner MANNHUMMEL FILTER SHANGHAI