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Silencer capable of eliminating both wideband noises and narrowband noises

A muffler and narrow-band technology, which is applied in the field of mufflers, can solve problems such as long duration, and achieve the effect of occupying less space, eliminating broadband and narrow-band noise, and saving space

Inactive Publication Date: 2013-03-27
郭荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current numerical calculation method to solve the sound field inside the muffler often cannot reflect the influence of structural parameter changes on the transmission loss in a timely and efficient manner, and it often takes a long time from the early modeling preparation to the later processing of the results
In terms of theoretical algorithms, no simple and efficient algorithm for engineering has been proposed.

Method used

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  • Silencer capable of eliminating both wideband noises and narrowband noises
  • Silencer capable of eliminating both wideband noises and narrowband noises
  • Silencer capable of eliminating both wideband noises and narrowband noises

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Select the option (1) for optimization, that is, the resonant cavity width is variable, and the perforation aperture and number of holes are not variable.

[0070] Table 3 is the set broadband size constraint value table:

[0071] Table 3 Wideband Size Constraint Value Table

[0072]

[0073] Table 4 is the narrow-band size constraint table:

[0074] Table 4 Narrowband Size Constraint Value Table

[0075]

[0076] After optimization, the optimization results of the parameters are shown in Table 5:

[0077] Table 5 Optimization results

[0078]

[0079] The optimized transmission loss curve and the target curve are attached Figure 5 , it can be seen from the figure that compared with the target curve, the optimized curve basically satisfies the target curve, so the optimized muffler can meet the requirements of eliminating broadband and narrow-band noise at the same time.

[0080] Therefore, the structural parameters of the optimized muffler that can elimi...

Embodiment 2

[0083] Select the (2) scheme for optimization, the resonant cavity is wide, the perforation aperture is variable, and the number of holes is not variable.

[0084] Table 6 is the set broadband size constraint value table:

[0085] Table 6 Wideband Size Constraint Value Table

[0086]

[0087] Table 7 is a narrow-band size constraint table:

[0088] Table 7 Narrowband Size Constraint Value Table

[0089]

[0090] After optimization, the optimization results of the parameters are shown in Table 8:

[0091] Table 8 Optimization results

[0092]

[0093] The optimized transmission loss curve and the target curve are attached Image 6 , it can be seen from the figure that compared with the target curve, the optimized curve basically satisfies the target curve, so the optimized muffler can meet the requirements of eliminating broadband and narrow-band noise at the same time.

[0094] Therefore, the structural parameters of the optimized muffler that can eliminate narro...

Embodiment 3

[0097] Select the (3) scheme for optimization, the resonant cavity is wide, the perforation aperture is variable, and the number of holes is not variable.

[0098] Table 9 is the set broadband size constraint value table:

[0099] Table 9 Broadband Size Constraint Value Table

[0100]

[0101] Table 10 is a narrow-band size constraint table:

[0102] Table 10 Narrowband Size Constraint Value Table

[0103]

[0104] After optimization, the optimization results of the parameters are shown in Table 11:

[0105] Table 11 Optimization results

[0106]

[0107] The optimized transmission loss curve and the target curve are attached Figure 7 , it can be seen from the figure that compared with the target curve, the optimized curve basically satisfies the target curve, so the optimized muffler can meet the requirements of eliminating broadband and narrow-band noise at the same time.

[0108] Therefore, the structural parameters of the optimized muffler that can eliminate...

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Abstract

The invention relates to the field of a silencer and in particular provides a silencer capable of eliminating both wideband noise and narrowband noise. The silencer comprises an annular air pipe; the inner pipe of the annular air pipe is an airflow main pipe, and at least two resonant cavities are arranged in the outer pipe of the annular air pipe; perforations are arranged in the wall of the airflow main pipe, and each resonant cavity is communicated with the airflow main pipe through at least one group of perforations; the wall of the outer pipe of the annular air pipe is formed by pipelines with the same diameter or by two or more pipelines with different pipelines which are connected in series; and the resonant cavities are separated by a clapboard. By adjusting the widths of the annular resonant cavities, the diameter and quantity of the outer pipes as well as the bore diameter and the quantity of the perforations in combination with the nonlinear least square method, the invention optimizes and obtains a superior assembly of the width, diameter and quantity of the resonant cavities and the bore diameter and quantity of the perforations of the silencer so that the silencer can have the effect of eliminating both wideband noises and narrowband noises. Meanwhile, the silencer is compact in structure and small in occupied room and saves room while the noise elimination performance is fulfilled.

Description

technical field [0001] The invention relates to the field of mufflers, in particular to a muffler capable of simultaneously eliminating wide-band and narrow-band noises. Background technique [0002] As an important product in the field of industrial products, automobiles occupy a large share. However, the noise of the intake and exhaust system of automobiles seriously affects people's physical and mental health. Therefore, the noise generated by the intake and exhaust system must be controlled. Installing a muffler with a reasonable structure is one of the most effective measures to control the noise of the intake and exhaust systems. At present, large and medium-sized diesel engines have basically achieved supercharging, and more and more gasoline engines have achieved supercharging. Supercharged engines have created new problems with noise and vibration in cars and road traffic noise. When the turbocharger is working, it will produce obvious howling sound, the frequency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M35/12
Inventor 郭荣
Owner 郭荣
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