CN208966390U - The composite muffler of large perforation rate - Google Patents

Abstract

The utility model discloses a kind of composite muffler of large perforation rate, has the partitions of perforation in shell by four pieces, is divided into five cavitys.The through-hole and third chamber that air inlet pipe passes through outer wall；Coupling tube passes through the 5th chamber of second chamber, third chamber and the 4th chamber, and coupling tube also passes through the through-hole and second chamber, third chamber, the 4th chamber of outer wall；Escape pipe passes through second chamber, third chamber and the 4th chamber first chamber, and escape pipe also passes through the through-hole and second chamber, third chamber, the 4th chamber of outer wall；Coupling tube and escape pipe are equipped with high-frequency tube.The utility model smooth in exhaust, power loss is small, and noise elimination effect is obvious, substantially increases the ability of silencer, use easy to spread.

Description

The composite muffler of large perforation rate

Technical field

The utility model relates to silencers, and in particular to a kind of composite muffler of large perforation rate.

Background technique

Generally using silencer to reduce exhaust noise in engine exhaust system, it is good to usually require that silencer has Noise elimination and lower back pressure.Simple expansion muffler is since structure is simple, has preferable acoustical absorptivity, so being present A kind of reactive muffler being widely used in automobile exhaust.Simple expansion muffler since fluid resistance loss is excessively high, therefore It is affected to exhaust back pressure.

Utility model content

The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of the compound of improved large perforation rate Silencer, large perforation rate perforated pipe, Perforated clapboard silencer are close with simple expansion muffler noise-cancelling theory, effect, greatly Punching rate perforated pipe, Perforated clapboard silencer have good guide functions due to there is a large amount of perforation, and air-flow can compare Expansion cavity is freely entered, to reduce airflow pressure losses.

To achieve the above object, the utility model is realized by following scheme: a kind of composite muffler of large perforation rate, By four pieces of partitions with perforation in shell, is divided into five cavitys, be followed successively by first chamber, second chamber, third chamber, 4th chamber and the 5th chamber；

Four pieces of partitions are followed successively by first partition, second partition, third partition, the 4th partition；

The through-hole and third chamber that air inlet pipe passes through outer wall；

Coupling tube passes through the 5th chamber of second chamber, third chamber and the 4th chamber, and coupling tube also passes through outer wall Through-hole and second chamber, third chamber, the 4th chamber；

Escape pipe passes through second chamber, third chamber and the 4th chamber first chamber, escape pipe and also passes through outer wall Through-hole and second chamber, third chamber, the 4th chamber；

Coupling tube and escape pipe are equipped with high-frequency tube.

The high-frequency tube interior surface is inlaid with sound-absorbing material.

The first partition, third partition, is equipped with multiple perforation on the 4th partition at second partition.

The air inlet of the air inlet pipe is located at third chamber, and the exhaust outlet of escape pipe is located at the 5th chamber.

Airtight chamber is formed between the outer wall of the escape pipe and the inner wall of the high-frequency tube.

The air inlet pipe is equipped with closed pipe plug in one end of third chamber.

The high-frequency tube be it is multiple, the diameter of each high-frequency tube is identical.

A large amount of perforation are equipped in the air inlet pipe and an air outlet pipe.

The pipe plug for preventing airflow is equipped in one end of third chamber in air inlet pipe, allows flow through air inlet pipe, shape At expansion noise elimination structure；

High-frequency tube forms resistive sound absorption structure.

Affiliated shell further includes that end cap, shell and end cap are sealed by seaming envelope technique realization.

The utility model has the following beneficial effects: the composite muffler of the porosity perforated pipe of the utility model, Perforated clapboard Structure is simple, and silencer inner cavity is divided into five cavitys by partition, air-flow was utilized to flow on the aperture on partition, is formed Expansion muffler is conducive to eliminate Middle and low frequency noise；Increase high-frequency tube on escape pipe, forms resistive sound absorption structure, favorably In absorption high frequency noise.There are good guide functions due to there is a large amount of perforation, air-flow, which can compare, freely enters expansion Chamber is opened, to reduce airflow pressure losses.To sum up can be summarized as: noise elimination effect is preferable and not will increase exhaust back pressure.

Detailed description of the invention

The utility model is described further with reference to the accompanying drawing:

Fig. 1 is the schematic view of the front view of the utility model.

Fig. 2 is the structural schematic diagram of first partition in the utility model.

Fig. 3 is the structural schematic diagram of second partition in the utility model.

Fig. 4 is the structural schematic diagram of second partition in the utility model.

Fig. 5 is the structural schematic diagram of second partition in the utility model.

Fig. 6 is the shell schematic view of the front view of the utility model.

In figure: shell 1, end cap 2, air inlet pipe 3, escape pipe 4, first partition 5, second partition 6, third partition 7, the 4th every Plate 8, first chamber 9, second chamber 10, third chamber 11, the 4th chamber 12, the 5th chamber 13, pipe plug 14, high-frequency tube 15.

Specific embodiment

As shown in Figure 1, a kind of composite muffler of large perforation rate, shell 1 is interior by four pieces of partitions with perforation, divides Five cavitys are divided into, first chamber 9, second chamber 10, third chamber 11, the 4th chamber 12 and the 5th chamber 13 are followed successively by；

Four pieces of partitions are followed successively by first partition 5, second partition 6, third partition 7, the 4th partition 8；

Air inlet pipe 3 is connected to by the through-hole of outer wall with third chamber 11；

Coupling tube passes through second chamber 10, third chamber 11 is connected to the 5th chamber 13 with the 4th chamber 12, and coupling tube is also logical The through-hole for crossing outer wall is connected to second chamber 10, third chamber 11, the 4th chamber 12；

Escape pipe 4 passes through second chamber 10, third chamber 11 is connected to first chamber 9 with the 4th chamber 12, and escape pipe 4 is also logical The through-hole for crossing outer wall is connected to second chamber 10, third chamber 11, the 4th chamber 12；

Coupling tube and escape pipe 4 are equipped with high-frequency tube 15.

Preferred 15 specification of scheme medium-high frequency pipe is 280mm-D70mm,

15 interior surface of high-frequency tube is inlaid with sound-absorbing material, has clear improvement to high-frequency noise.

The first partition 5, third partition 7, is equipped with multiple perforation on the 4th partition 8 at second partition 6.Thus structure, When air-flow is by these perforation, expansion muffler is formed, offsets or inhibit low-frequency noise.

The air inlet of the air inlet pipe 3 is located at third chamber, and the exhaust outlet of escape pipe 4 is located at the 5th chamber 13.

Airtight chamber is formed between the outer wall of the escape pipe 4 and the inner wall of the high-frequency tube 15.

The air inlet pipe 3 is equipped with closed pipe plug 14 in one end of third chamber 11.

The high-frequency tube 15 be it is multiple, the diameter of each high-frequency tube 15 is identical.

A large amount of perforation are equipped on the air inlet pipe 3 and escape pipe 4.

The pipe plug 14 for preventing airflow is equipped in one end of third chamber 11 in air inlet pipe 3, allows flow through air inlet Pipe 3 forms expansion noise elimination structure；

High-frequency tube 15 forms resistive sound absorption structure.

Affiliated shell 1 further includes that end cap 2, shell 1 and end cap 2 are sealed by seaming envelope technique realization.

The composite muffler air-flow of large perforation rate mainly moves towards are as follows: the air-flow of automobile engine discharge is from shell 1 Air inlet is flowed into air inlet pipe 4, air-flow is imported into third chamber 11 by the perforation in air inlet pipe 4, then air-flow leads to respectively It crosses perforation on second partition 6 and third partition 7 and flows into second chamber 10 and the 4th chamber 12, then pass through first partition 5 and the Perforation on four partitions 8 flows into first chamber 9 and gas is discharged by escape pipe 4 for the 5th chamber 13, air-flow, and air-flow is by going out Perforation on tracheae 4 enters high-frequency tube 15, by the sound-absorbing material built in high-frequency tube 15, can effectively increase sound deadening capacity, reduce tail Pipe noise.Air-flow in the bore flow on partition and pipeline, formed expanding noise elimination structure, thus make noise reach decaying and It offsets, the purpose of noise elimination is realized with this.

The composite muffler of the large perforation rate is optimized on the basis of original expansion silencer, by original list One caliber expansion noise elimination structure is changed to the expansion noise elimination structure of large perforation rate, and structure is simple, compact and reasonable, easy to assembly Fast, connection is reliable, and absorbs high-frequency noises by high-frequency tube 15, while absorbing low-frequency noise by expansion cavity；Compared to Original expansion noise elimination structure, i.e. smooth in exhaust, power loss is small, and noise elimination effect is obvious, substantially increases the ability of silencer, Use easy to spread.

The foregoing examples are merely illustrative of the technical concept and features of the invention, its object is to allow person skilled in the art It cans understand the content of the present invention and implement it accordingly, it is not intended to limit the scope of the present invention.I.e. within this range Equivalent replacement is improved, and is also within the protection scope of the utility model.

Claims (10)

1. the composite muffler of large perforation rate, it is characterized in that: being divided into shell (1) by four pieces of partitions with perforation Five cavitys are followed successively by first chamber (9), second chamber (10), third chamber (11), the 4th chamber (12) and the 5th chamber (13)；

Four pieces of partitions are followed successively by first partition (5), second partition (6), third partition (7), the 4th partition (8)；

Air inlet pipe (3) is connected to by the through-hole of outer wall with third chamber (11)；

Coupling tube passes through second chamber (10), third chamber (11) and is connected to the 5th chamber (13), coupling tube with the 4th chamber (12) Also it is connected to by the through-hole of outer wall with second chamber (10), third chamber (11), the 4th chamber (12)；

Escape pipe (4) passes through second chamber (10), third chamber (11) and is connected to first chamber (9), outlet with the 4th chamber (12) Pipe (4) is also connected to by the through-hole of outer wall with second chamber (10), third chamber (11), the 4th chamber (12)；

Coupling tube and escape pipe (4) are equipped with high-frequency tube (15).

2. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the first partition (5), second Partition (6), third partition (7) are equipped with multiple perforation on the 4th partition (8).

3. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the air inlet of the air inlet pipe (3) Mouth is located at third chamber, and the gas outlet of escape pipe (4) is located at the 5th chamber (13).

4. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the outer wall of the escape pipe (4) Airtight chamber is formed between the inner wall of the high-frequency tube (15).

5. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the air inlet pipe (3) is in third One end of chamber (11) is equipped with closed pipe plug (14).

6. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the internal table of the high-frequency tube (15) Face is inlaid with sound-absorbing material.

7. the composite muffler of large perforation rate according to claim 6, it is characterized in that: the high-frequency tube (15) is more A, the diameter of each high-frequency tube (15) is identical.

8. the composite muffler of large perforation rate according to claim 1, it is characterized in that: the air inlet pipe (3) and outlet A large amount of perforation are equipped on pipe (4).

9. the composite muffler of large perforation rate according to claim 1, it is characterized in that: in air inlet pipe (3) in third chamber One end of room (11) is equipped with the pipe plug (14) for preventing airflow, allows flow through air inlet pipe (3), forms expansion noise elimination knot Structure；

High-frequency tube (15) forms resistive sound absorption structure.

10. the composite muffler of large perforation rate according to claim 1, it is characterized in that: affiliated shell (1) further includes end It covers (2), shell (1) and end cap (2) seal technique by seaming and realize sealing.