CN208351924U

CN208351924U - A kind of full range impedance composite muffler and its automobile

Info

Publication number: CN208351924U
Application number: CN201820627608.0U
Authority: CN
Inventors: 李琨; 周达云; 蒲保全
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2019-01-08
Anticipated expiration: 2028-04-28

Abstract

The utility model discloses a full-frequency impedance composite muffler and an automobile thereof, comprising a first connection part, a first muffler part, a second muffler part and a second connection part, characterized in that the first muffler It consists of four anechoic cavities, one cavity, two cavity, three cavity and four cavity. One cavity is filled with the first sound-absorbing cotton, the second cavity is filled with the second sound-absorbing cotton, the third cavity is an expansion cavity, and the fourth cavity is filled with the third sound-absorbing cotton. ; The density of the first sound-absorbing cotton, the second sound-absorbing cotton, and the third sound-absorbing cotton are all different. There are evenly distributed through holes on the first baffle in one cavity, and no holes are opened on the second baffle and the third baffle, so that only a small part of the airflow passes through the one cavity, and almost no airflow through the four cavities, thereby reducing the size of one cavity. , The temperature of the four chambers reduces the radiation heat gain of the rubber suspension block, prolongs the service life of the rubber suspension block, and increases the casing in the middle pipe of the muffler and the rear pipe of the muffler to interrupt the standing wave and reduce the noise.

Description

A kind of full range impedance composite muffler and its automobile

Technical field

The utility model relates to a kind of silencers, more particularly to a kind of full range impedance composite muffler and its automobile.

Background technique

Silencer be mounted on the airflow channel of air powered equipment (such as internal combustion engine, air blower and air compressor machine) or into, The device of reduction noise in exhaust system.Silencer can reduce noise, rationalization's air-flow and Temperature Distribution.It is that control is made an uproar The effective tool of sound.Normal straight tube perforation silencer, structure is the straight tube of an endcapped, and many aperture masters are drilled on tube wall If using the frequency spectrum of jet noise as foundation, if keeping the gross area of spout constant and being replaced with many small spouts, when When air-flow is through small holes, the frequency spectrum of jet noise will shift to high frequency or hyperfrequency, make the audible sound constituent reduction in frequency spectrum, but It is to still remain sound deadening capacity deficiency or exist to pass through frequency.Meanwhile the less consideration silencer internal structure pair of arc exhaust system The influence of system temperature field, there are the excessively high problems of rubber mounting deblocking temperature.

Utility model content

In view of this, the present invention provides a kind of full range impedance composite muffler and its automobile, very good solutions Sound deadening capacity is insufficient or there are problems that passing through frequency, while by the way that silencer muffler partition plate and core pipe is rationally arranged, adjustment is properly Acoustical cotton density, the number of openings and position, while solving the problems, such as that rubber mounting deblocking temperature is excessively high.

To achieve the above object, the utility model provides the following technical solutions:

A kind of full range impedance composite muffler silencer, including first connecting portion, the first noise elimination portion, the second noise elimination portion, Second connecting portion, which is characterized in that first noise elimination portion is made of four noise elimination cavities, a chamber, two chambers, three chambers, four chambers, wherein One chamber fills the first acoustical cotton, and two chambers fill the second acoustical cotton, and three chambers are expansion cavity, and four chambers fill third acoustical cotton；

First acoustical cotton, the second acoustical cotton, third acoustical cotton density are all different.

Preferably, a kind of full range impedance composite muffler, four noise elimination cavities are by drive end bearing bracket, the first core pipe, first Partition, second partition, the second core pipe, third partition, rear end cap, silencer cylinder composition.

Preferably, a kind of full range impedance composite muffler, first acoustical cotton, first partition, the second acoustical cotton, Two partitions, third partition, third acoustical cotton are set gradually along gas flow direction.

Preferably, a kind of full range impedance composite muffler, there is first partition in a chamber and two chambers, in first partition It is provided with through-hole.

Preferably, a kind of full range impedance composite muffler, two chamber and three chambers have second partition, and three chambers and four chambers have Third partition, second partition and third partition not aperture.

Preferably, a kind of full range impedance composite muffler, in the first core pipe outer ring and four chambers in a chamber, two chambers The second core pipe outer ring be provided with equally distributed through-hole.

Preferably, a kind of full range impedance composite muffler, second noise elimination portion by silencer intermediate tube, casing, disappear Pipe forms after sound device.

Preferably, a kind of full range impedance composite muffler, after described sleeve pipe is mounted on silencer intermediate tube and silencer Between pipe.

Preferably, a kind of automobile, the automobile include the use of any of the above-described full range impedance composite muffler stated.

It can be seen from the above technical scheme that a kind of full range impedance composite muffler provided by the utility model and its Automobile, silencer is by drive end bearing bracket, the first core pipe, first partition, second partition, the second core pipe, third partition, rear end cap, noise elimination Device cylinder forms four noise elimination cavities, is a chamber, two chambers, three chambers, four chambers respectively, and three chambers are expansion cavity, a chamber, two chambers, four chambers point Not Tian Chong different densities acoustical cotton, reach to the absorption of the volume of different frequency, have silencer in different frequency sections larger Sound deadening capacity, avoid passing through frequency, can preferably solve the problems, such as to eliminate the noise so insufficient or pass through frequency, wherein first Equally distributed through-hole is provided on partition, second partition, third partition not aperture make a chamber only have small part air-flow to pass through, and four Chamber is almost without air-flow process, to reduce the temperature of a chamber, four chambers, that reduces rubber mounting block radiates to obtain heat, temperature compared with Low, the service life extends；Meanwhile because managing too long after silencer intermediate tube and silencer, standing wave can be generated, in silencer intermediate tube And casing is installed to interrupt standing wave between pipe after silencer, reduce noise.

Detailed description of the invention

Fig. 1 is the schematic diagram of the section structure of silencer provided by the embodiment of the utility model；

Fig. 2 is the first noise elimination of silencer provided by the embodiment of the utility model portion structural schematic diagram；

Fig. 3 is the second noise elimination of silencer provided by the embodiment of the utility model portion structural schematic diagram；

Fig. 4 is silencer first partition structural schematic diagram provided by the embodiment of the utility model；

Fig. 5 is second and third diaphragm structure schematic diagram of silencer provided by the embodiment of the utility model；

Wherein, 1 is first connecting portion, and 2 be the first noise elimination portion, and 21 be drive end bearing bracket, and 22 be the first core pipe, and 215 inhale for first Sound cotton, 23 be first partition, and 216 be the second acoustical cotton, and 24 be second partition, and 25 be silencer cylinder, and 26 be the second core pipe, 27 For third partition, 217 be third acoustical cotton, and 28 be rear end cap, and 29 be rubber mounting block, and 210 be a chamber, and 211 be two chambers, 213 For three chambers, 214 be four chambers, and 3 be the second noise elimination portion, and 31 be silencer intermediate tube, and 32 be casing, and 33 is manage after silencer, and 4 be the Two interconnecting pieces.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

A kind of silencer provided by the embodiment of the utility model, comprising: first connecting portion 1, drive end bearing bracket 21, the first core pipe 22, the first acoustical cotton 215, first partition 23, the second acoustical cotton 216, second partition 24, silencer cylinder 25, the second core pipe 26, Third partition 27, third acoustical cotton 217, rear end cap 28, rubber mounting block 29, a chamber 210, two chambers 211, three chambers 213, four chambers 214, silencer intermediate tube 31, casing 32, pipe 33 after silencer, second connecting portion 4.

In the present invention, silencer by drive end bearing bracket 21, rear end cap 28, first partition 23, second partition 24, third every Plate 27, silencer cylinder 25 and the first core pipe 22, the second core pipe 26 form four noise elimination cavities, be respectively a chamber 210, two chambers 211, Three chambers 213, four chambers 214, wherein three chambers 213 are expansion cavity, a chamber 210, two chambers 211, four chambers 214 fill different densities respectively Acoustical cotton, a chamber 210 fill the first acoustical cotton 215, and two chambers 211 fill the second acoustical cotton 216, and four chambers 214 fill third sound-absorbing Cotton 217, when having in a chamber 210, when passing through frequency, two chambers 211 can absorb again to frequency is passed through, passing through frequently in two chambers 211 Rate can absorb again in four chambers 214, so that silencer is had biggish sound deadening capacity in different frequency sections, avoid passing through frequency, can Solve the problems, such as that noise elimination is insufficient or passes through frequency with better.

In the present invention, it is provided with the hole being evenly arranged in first partition 23, on second partition 24, third partition 27 Not aperture makes a chamber 210 only have small part air-flow to pass through, and four chambers 214 are almost without air-flow process.To reduce a chamber 210, four The temperature of chamber 214, that reduces rubber mounting block 29 radiates to obtain heat, and temperature is lower, and the service life extends.

In the present invention, pipe 33 can generate because of the too long reason of length after silencer intermediate tube 31 and silencer Standing wave is installing casing 32 to interrupt standing wave, is reducing noise between pipe 33 after silencer intermediate tube 31 and silencer.

In the present invention, 210 part of a chamber of the first core pipe 22 is uniformly provided with hole, wherein the first core pipe 22 1 weeks Hole is 24, and 24 rows amount to 576 holes, and two chambers, 211 part of the second core pipe 26 is uniformly provided with hole, wherein the first core pipe 22 One week hole is 23, and 11 rows amount to 253 holes, and four chambers, 214 part of the second core pipe 26 is uniformly provided with hole, wherein the second core 26 1 collar aperture of pipe is 24, and 24 rows amount to 576 holes.

In the present invention, acoustical cotton and partition are according to the first acoustical cotton 215, first partition 23, the second acoustical cotton 216, second partition 24, third partition 27, third acoustical cotton 217 are set gradually along gas flow direction, the first acoustical cotton 215, Second acoustical cotton 216 is filled in the space between the first core pipe 22 and silencer cylinder 25, and third acoustical cotton 217 is filled in In space between two core pipes 26 and silencer cylinder 25, first partition 23 divides the first acoustical cotton 215 and the second acoustical cotton 216 It separates.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.

The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The widest scope consistent with features of novelty.

Claims

1. A full-frequency impedance composite muffler, comprising a first connection portion, a first muffler portion, a second muffler portion, and a second connection portion, wherein the first muffler portion is composed of four muffler cavities. , consisting of one cavity, two cavities, three cavities, and four cavities, of which one cavity is filled with the first sound-absorbing cotton, the second cavity is filled with the second sound-absorbing cotton, the third cavity is an expansion cavity, and the fourth cavity is filled with the third sound-absorbing cotton;

The first sound-absorbing cotton, the second sound-absorbing cotton, and the third sound-absorbing cotton have different densities.

2. The full-frequency impedance composite muffler according to claim 1, wherein the four muffler cavities are composed of a front end cover, a first core tube, a first partition, a second partition, a second core tube, The third partition plate, the rear end cover and the muffler cylinder are composed.

3 . The full-frequency impedance composite muffler according to claim 1 , wherein the first sound-absorbing cotton, the first clapboard, the second sound-absorbing cotton, the second clapboard, the third clapboard, and the third sound-absorbing cotton are 3 . The cotton is arranged in sequence along the gas flow direction.

4 . The full-frequency impedance composite muffler according to claim 3 , wherein there are first partitions in the first cavity and the second cavity, and the first partitions are provided with uniformly distributed through holes. 5 .

5. The full-frequency impedance composite muffler according to claim 3, wherein the second cavity and the third cavity have a second partition, the third cavity and the fourth cavity have a third partition, and the second partition and the third The three partitions do not have holes.

6 . The full-frequency impedance composite muffler according to claim 1 , wherein the first core tube in the first cavity and the second cavity and the second core tube in the fourth cavity have uniformly distributed through holes. 7 .

7 . The full-frequency impedance composite muffler according to claim 1 , wherein the second muffler is composed of a muffler middle pipe, a sleeve and a muffler rear pipe. 8 .

8 . The full-frequency impedance composite muffler according to claim 7 , wherein the sleeve is installed between the middle pipe of the muffler and the rear pipe of the muffler. 9 .

9. An automobile, characterized in that the automobile comprises the full-frequency impedance composite muffler according to any one of claims 1 to 8.