CN211422806U

CN211422806U - Multi-band broadband silencer capable of being rapidly applied

Info

Publication number: CN211422806U
Application number: CN201922377598.7U
Authority: CN
Inventors: 史哲东; 朱静; 蔡佳明
Original assignee: Mann and Hummel Filter Shanghai Co Ltd
Current assignee: Mann and Hummel Filter Shanghai Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-04
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a multifrequency section wide band silencer that can use fast, include first casing, second casing and locate interior intubate in first casing and the second casing, first casing and second casing accordant connection, be equipped with the through-hole on the pipe wall of intubate, interior intubate with form a plurality of amortization cavity structures between first casing and the second casing, interior intubate the tip with interval setting between first casing or the second casing to form annular gap. The silencer has a good noise reduction effect on the noise from 1200Hz to 5000Hz, and can be used for silencing the noise of different frequency sections by arranging the structure of a single inner inserting tube.

Description

Multi-band broadband silencer capable of being rapidly applied

Technical Field

The utility model relates to a silencer structure, concretely relates to multifrequency section wide band silencer that can use fast.

Background

At present, the trend of passenger car engines is miniaturization and supercharging. The turbocharger increases the surplus of engine power and torque, and also generates certain high-frequency broadband noise. At present, measures taken by various host factories and air intake system suppliers for the high-frequency broadband noise are that after noise data are measured, problem frequency is judged through a large amount of subjective and objective analysis, and then broadband mufflers with corresponding frequency bands are specially designed and installed on a clean side air inlet pipe in front of an air compressor and a pressure increasing pipe behind the air compressor.

Patent CN 205318844U discloses the variable general muffler of high-efficient wide band section of pipeline axial welding, comprises at least two intubate of setting in the pipeline axial, and each intubate guarantees sealedly with the person in charge welded connection of pipeline, utilizes the pipeline space to carry out the muffler design, and through changing two intubate in, technology and structure can be more free, in addition through the selection of intubate in the difference, and noise cancelling frequency can cover and reach more than 10000 HZ.

However, it has no good noise elimination effect for the noise of 1200Hz to 5000Hz, and because of the two inner plugs, there is a certain complexity in the process design, which does not facilitate the inner plug design for the noise of different frequency bands.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a but quick application's multifrequency section wide band silencer in order to solve above-mentioned problem has better noise reduction effect to 1200Hz to 5000 Hz's noise, and sets up through the structure to single interior intubate, can carry out the amortization to the noise of different frequency bands.

The purpose of the utility model is realized through the following technical scheme:

a multi-band broadband muffler capable of being rapidly applied comprises a first shell, a second shell and an inner insertion tube arranged in the first shell and the second shell, wherein the first shell and the second shell are connected in a matched mode, through holes are formed in the tube wall of the inner insertion tube, a plurality of noise reduction cavity structures are formed between the inner insertion tube and the first shell and between the inner insertion tube and the second shell, and an annular gap is formed between the end portion of the inner insertion tube and the first shell or the second shell at intervals.

Further, the distance of the annular gap between the inner insert tube and the first shell or the second shell corresponds to noises in different frequency ranges, when the volume of the corresponding chamber is fixed, the larger the distance of the annular gap is, the higher the frequency of the eliminated noise is, the wider the frequency range is, and different noise reduction frequency ranges can be adjusted by changing the distance of the annular gap.

Furthermore, the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 1-3mm, and the frequency range of the eliminated noise is 1500-2000 Hz.

Furthermore, the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 3-5mm, and the frequency range of the eliminated noise is 2000-4000 Hz.

Furthermore, the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 8-12mm, and the frequency range of eliminated noise is 3000-5500 Hz.

Further, the through hole on the wall of the inner inserting tube is round and/or square.

Furthermore, the first shell and the second shell are stepped pipelines and gradually increase from the outer end to the inner connecting end; at least one annular limiting partition plate is arranged on the outer pipe wall of the inner inserting pipe, and the annular limiting partition plate is matched with different stages of stepped pipelines of the first shell and the second shell.

Further, the first shell, the second shell and the inner inserting tube are coaxially arranged, the first shell and the second shell are connected through screws or welding, and the inner inserting tube is clamped and fixed by the first shell and the second shell.

Furthermore, an independent silencing chamber is formed between the inner inserting tube and the annular limiting partition plate and the first shell or between the inner inserting tube and the second shell, and a plurality of silencing holes communicated with the silencing chamber are formed in the tube wall of the inner inserting tube.

Further, the annular gap communicates with a sound-deadening chamber formed at an end of the inner insert tube.

Further, the shell and the inner inserting pipe can be made of materials according to material characteristics, and metal materials, non-metal materials and the like can be adopted.

The utility model discloses the same casing size who is responsible for the pipe diameter of silencer is unchangeable, uses the interior intubate of different length to eliminate the noise of different frequency ranges, need not design specially, during the tuning, through different interior intubate of try-in, can the high frequency wide band noise's of spot failure frequency interval of rapid judgement, when confirming the frequency channel of high frequency wide band noise, can choose corresponding interior intubate for use fast.

The high-frequency broadband noise energy generated by the supercharger is transmitted to the main pipe of the silencer through the pipeline, the corresponding inner inserting pipe is quickly selected to be installed in the shell according to the determined noise frequency range, and the noise energy of the corresponding frequency range is dissipated through the noise elimination structure formed by the inner inserting pipe and the shell, so that the effect of reducing the high-frequency broadband noise is achieved.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a same casing size is used to the person in charge pipe diameter, applicable multiple motorcycle type and platform, reduces casing development cost.

2. The inner insertion tubes with different specifications can be quickly selected to solve corresponding noise, and the period for solving the high-frequency broadband noise of the supercharger is shortened.

3. The application range is wide, and the shell and the inner inserting pipe can be made of metal or nonmetal materials according to material characteristics, so the heat-resistant and pressure-resistant pipe is particularly suitable for special occasions with high requirements on temperature resistance and pressure resistance.

4. The method can be used for quickly confirming the noise frequency band during early tuning in development.

5. The method can be used for directly solving the high-frequency broadband noise in the later development stage.

Drawings

Fig. 1 is a schematic structural diagram of a first housing of the present invention;

fig. 2 is a schematic structural diagram of a second housing of the present invention;

FIG. 3 is a schematic view of the structure of an insert tube according to embodiment 1 of the present invention;

fig. 4 is a schematic view of the overall structure of a muffler according to embodiment 1 of the present invention;

fig. 5 shows the result of the acoustic transmission loss test according to embodiment 1 of the present invention;

fig. 6 is a schematic structural view of an insert tube according to embodiment 2 of the present invention;

fig. 7 is a schematic view of the overall structure of a muffler according to embodiment 2 of the present invention;

fig. 8 shows the result of the acoustic transmission loss test according to embodiment 2 of the present invention;

fig. 9 is a schematic structural view of an insert tube according to embodiment 3 of the present invention;

fig. 10 is a schematic view of the overall structure of a muffler according to embodiment 3 of the present invention;

fig. 11 shows the result of the acoustic transmission loss test according to embodiment 3 of the present invention;

in the figure: 1-a first housing; 2-a second housing; 3-inserting a tube; 31-a through hole; 32-annular limiting partition plate; 33-an annular gap; 34-sound-deadening chamber

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

A multi-band broadband muffler capable of being rapidly applied comprises a first shell 1, a second shell 2 and an inner inserting tube 3 arranged in the first shell 1 and the second shell 2, as shown in figures 1, 2 and 3, the first shell 1 and the second shell 2 are stepped pipelines, the outer ends of the inner inserting tube gradually increase towards the inner connecting end, namely the two ends are thin and the middle is thick, two annular limiting partition plates 32 are arranged on the outer tube wall of the inner inserting tube 3, and the annular limiting partition plates 32 are matched with different stepped pipelines of the first shell 1 and the second shell 2.

First casing

1 and 2 accordant connection of second casing are equipped with through-hole 31 on the pipe wall of intubate 3, and through-hole 31 is circular or square, and this embodiment has 7 round holes of 8mm diameter on the intubate, and the percent opening is 8%, 4 12mm 2 mm's square hole, and the percent opening is 3%, and two corresponding cavities are 0.029L. The first shell 1, the second shell 2 and the inner inserting tube 3 are coaxially arranged, the first shell 1 and the second shell 2 are connected through screws or welding, the inner inserting tube 3 is clamped and fixed by the first shell 1 and the second shell 2, the inner inserting tube 3, the annular limiting partition plate 32 and the first shell as well as the second shell form three independent silencing chambers 34, a plurality of silencing through holes 31 communicated with the silencing chambers are formed in the tube wall of the inner inserting tube 3, the through holes 31 of the uppermost silencing chambers are circular, and the through holes 31 of the middle silencing chambers are rectangular.

Interior tip of intubate 3 and second casing 2 between the interval set up to form annular gap 33, annular gap 33 communicates with each other with the amortization cavity that interior intubate 3 tip formed, this embodiment annular gap 33's distance is 2mm, and fig. 5 is the utility model discloses embodiment 1 acoustic transmission loss test result can know that acoustic transmission loss is the biggest at 1500 ~ 2000Hz within range, and noise cancelling effect is better.

Example 2

As shown in fig. 6, 7 and 8, compared with embodiment 1, the present embodiment is different in that the inner tube 3 has a plurality of sound-deadening through holes 31 on the wall thereof, the sound-deadening through holes 31 are rectangular, the inner tube has 4 square holes 25mm by 6.5mm, the aperture ratio is 14%, 4 square holes 25mm by 3.7mm, the aperture ratio is 11.7%, the two corresponding chambers are both 0.029L, and the noise-deadening frequency range is 2000 to 4000 Hz.

In addition, the distance that forms annular gap 33 between the lower tip of interior intubate 3 and second casing 2 is greater than embodiment 1, and the distance of this embodiment annular gap 33 is 4mm, and the noise frequency range of elimination is 2000 ~ 3000Hz, and fig. 8 is the utility model discloses embodiment 2 acoustic transmission loss test result, it is known that acoustic transmission loss is the biggest in 2000 ~ 4000Hz within range, and noise cancelling effect is better.

Example 3

Referring to fig. 9, 10 and 11, the present embodiment is different from embodiment 2 in that the inner tube 3 has a plurality of sound-deadening through holes 31 on its wall, which are communicated with the sound-deadening chamber 34, the through holes 31 are rectangular, the openings of the through holes 31 are larger than those of embodiment 2, the present embodiment has 4 square holes 28mm by 12.5mm on the inner tube, the opening ratio is 31.8%, the opening ratio of the 4 square holes 28mm by 9mm is 34%, both corresponding chambers are 0.029L, and the noise-eliminating frequency range is 3000 to 5500 Hz. In addition, the distance that forms annular gap 33 between interior intubate 3's lower tip and the second casing 2 is also big, and this embodiment annular gap 33's distance is 10mm, and the noise frequency range of elimination is 3000 ~ 5500Hz, and fig. 11 is the utility model discloses embodiment 2 acoustic transmission loss test result, it is known that acoustic transmission loss is the biggest in the range of 3000 ~ 5500Hz, and noise cancelling effect is better.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. A multi-band broadband muffler capable of being rapidly applied comprises a first shell, a second shell and an inner inserting tube arranged in the first shell and the second shell, wherein the first shell and the second shell are connected in a matched mode, through holes are formed in the tube wall of the inner inserting tube, and a plurality of noise reduction cavity structures are formed between the inner inserting tube and the first shell and between the inner inserting tube and the second shell.

2. The multi-band wide-band muffler capable of being used rapidly as claimed in claim 1, wherein the distance of the annular gap between the inner plug and the first housing or the second housing corresponds to noise in different frequency ranges, and when the corresponding chamber volume is constant, the larger the distance of the annular gap, the higher the noise elimination frequency is, and the wider the frequency range is.

3. The multiband broadband muffler capable of being rapidly applied according to claim 2, wherein the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 1-3mm, and the frequency range of noise elimination is 1500-2000 Hz.

4. The multiband broadband muffler capable of being rapidly applied according to claim 2, wherein the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 3-5mm, and the frequency range of noise elimination is 2000-4000 Hz.

5. The multiband broadband muffler capable of being rapidly applied according to claim 2, wherein the volume of the chamber is 0.05-0.1L, the distance of the annular gap is 8-12mm, and the frequency range of the noise to be eliminated is 3000-5500 Hz.

6. The multiband wide-band muffler capable of being used rapidly according to claim 1, wherein the through hole of the inner insert tube wall is circular and/or square.

7. The multiband broadband muffler capable of being rapidly applied according to any one of claims 1 to 6, wherein the first housing and the second housing are stepped pipelines, and gradually increase from the outer end to the inner connecting end;

at least one annular limiting partition plate is arranged on the outer pipe wall of the inner inserting pipe, and the annular limiting partition plate is matched with different stages of stepped pipelines of the first shell and the second shell.

8. The muffler of claim 7, wherein the first housing, the second housing and the inner insert tube are coaxially disposed, the first housing and the second housing are connected by a screw or a welding, and the inner insert tube is clamped and fixed by the first housing and the second housing.

9. The multi-band wide-band muffler capable of being used rapidly as claimed in claim 8, wherein the inner insert tube forms a separate muffling chamber with the annular limiting partition and the first housing or the second housing, and the inner insert tube has muffling holes communicating with the muffling chamber.

10. The multiband wide-band muffler capable of being used rapidly according to claim 9, wherein the annular gap communicates with a sound-deadening chamber formed at an end of the inner plug.