CN218542361U

CN218542361U - Single-inlet single-outlet silencer

Info

Publication number: CN218542361U
Application number: CN202222558905.3U
Authority: CN
Inventors: 刘用国; 成忠虎
Original assignee: Wuhan Chaoya Yuanli Technology Co ltd
Current assignee: Wuhan Chaoya Yuanli Technology Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-02-28
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to the technical field of silencers, in particular to a single-inlet single-outlet silencer, which comprises a main shell, wherein an inner cavity of the main shell is sequentially divided into a third cavity, a second cavity and a first cavity along the length direction; an air inlet pipe which sequentially penetrates through the three chambers and the second chamber horizontally and extends into the first chamber is arranged outside the main shell; the intake pipe rear end is provided with the mounting panel, be provided with the central branch pipe that is located the axis on the mounting panel and a plurality of outside branch pipes that encircle the central branch pipe and distribute. The utility model relates to a singly advance singly to go out silencer, the air current gets into through horizontal intake pipe then once through first cavity, second cavity and third cavity, guarantees that the air current has sufficient passageway stroke in the silencer, and the rational utilization space reduces the volume to account for the ratio simultaneously, adopts the mode of multistage noise elimination gradually to improve noise cancelling effect promptly, has reduced exhaust back pressure simultaneously, accords with small-size generating set's afterbody noise elimination demand.

Description

Single-inlet single-outlet silencer

Technical Field

The utility model relates to a silencer technical field specifically is a singly advance singly to go out silencer.

Background

The muffler is a device which can block sound transmission and allow airflow to pass through, is an important part for reducing the schedule noise of the internal combustion engine, and the performance of the muffler directly influences the noise of the engine.

The silencer is a device for reducing the noise of the air flow, can allow the air flow to pass through, can effectively prevent or reduce the outward transmission of sound energy, has wide application, and has obvious effect particularly in the application of reducing the noise of an exhaust system of a generator set engine.

With continuous innovation of small-sized generator sets and higher noise reduction requirements of people on environmental noise, the volume of an inner cavity of an original industrial-grade silencer can be enlarged as much as possible in order to keep a longer silencing channel, so that the silencer is large in size, is not convenient to install, and the backpressure value can not be guaranteed easily.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a singly advance singly go out silencer and solve above-mentioned silencer and lead to the too big and unstable problem of backpressure value of volume for guaranteeing longer noise elimination passageway.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a single-inlet single-outlet silencer comprises a main shell, wherein an inner cavity of the main shell is sequentially divided into a third cavity, a second cavity and a first cavity along the length direction; an air inlet pipe which sequentially horizontally penetrates through the three chambers and the second chamber and extends into the first chamber is arranged outside the main shell; the rear end of the air inlet pipe is provided with a mounting plate, and the mounting plate is provided with a central branch pipe positioned on an axis and a plurality of external branch pipes distributed around the central branch pipe; a plurality of first inserting pipes communicated with the second chamber are arranged in the first chamber; a plurality of second insertion tubes communicated with the third chamber are arranged in the second chamber; an air outlet pipe communicated with the first chamber is further arranged outside the main shell.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the air inlet pipe, the first inserting pipe, the second inserting pipe and the air outlet pipe are all arranged along the horizontal direction, the air outlet of the first inserting pipe and the air inlet of the second inserting pipe are arranged in a staggered mode, and the air outlet of the second inserting pipe and the air inlet of the air outlet pipe are arranged in a staggered mode.

Furthermore, the air inlet ends of the first inserting pipe, the second inserting pipe and the air outlet pipe are all in a flaring shape.

Furthermore, the first chamber and the second chamber, and the second chamber and the third chamber are separated by a solid partition plate.

Furthermore, all be equipped with the interior casing with main casing internal wall spaced in third chamber, second chamber and the first chamber, it has first sound absorbing layer to fill between interior casing and the main casing body.

Furthermore, perforated plates are arranged at the head end and the tail end of the inner cavity of the main shell and at the two sides of the solid partition plate; the gap between the main shell and the perforated plate and the gap between the solid partition plate and the perforated plate are filled with a second sound absorption layer.

Further, the solid partition plate and the perforated plate are arranged along the direction perpendicular to the cross section of the main shell.

Furthermore, the first sound absorption layer and the second sound absorption layer are both made of glass fiber cotton.

Further, the main shell is formed by welding and assembling a circular cylinder and end plates positioned at two ends; and a plurality of bottom reinforcing ribs are arranged at the joint of the end plate and the circular cylinder along the circumferential direction.

Furthermore, the outer surface of the front section of the end plate is also provided with a hanging ring.

The utility model has the advantages that: the utility model relates to a singly advance singly to go out silencer, the air current gets into through horizontal intake pipe then once through first cavity, second cavity and third cavity, guarantees that the air current has sufficient passageway stroke in the silencer, and the rational utilization space reduces the volume to account for the ratio simultaneously, adopts the mode of multistage noise elimination gradually to improve noise cancelling effect promptly, has reduced exhaust back pressure simultaneously, accords with small-size generating set's afterbody noise elimination demand.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the portion A of FIG. 2 according to the present invention;

figure 5 is the utility model discloses the single line chart of singly going into single silencer test data.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the main casing, 2, intake pipe, 2.1, mounting panel, 2.2, central branch pipe, 2.3, outside branch pipe, 3, first insert tube, 4, second insert tube, 5, outlet duct, 6, real baffle, 7, interior casing, 8, first sound absorbing layer, 9, perforated plate, 10, second sound absorbing layer, 11, bottom strengthening rib, 12, rings.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as if they were connected either fixedly or removably, or as integrally formed structures. The specific meaning of such terms in this patent may be understood by one of ordinary skill in the art as appropriate.

As shown in fig. 1-4, the single-inlet single-outlet muffler of the present invention comprises a main housing 1, wherein an inner cavity of the main housing 1 is sequentially divided into a third chamber, a second chamber and a first chamber along a length direction; an air inlet pipe 2 which sequentially penetrates through the three chambers and the second chamber horizontally and extends into the first chamber is arranged outside the main shell 1; the rear end of the air inlet pipe 2 is provided with a mounting plate 2.1, the mounting plate 2.1 is provided with a central branch pipe 2.2 positioned on an axis and a plurality of external branch pipes 2.3 distributed around the central branch pipe 2.2, the external branch pipes 2.3 are provided with six groups, the two groups of external branch pipes 2.3 are uniformly distributed, and in the process that air flow passes through the air inlet pipe 2, the air flow is divided into a plurality of sub-air flows through the central branch pipe 2.2 and the external branch pipes 2.3 and enters a first cavity, so that the resistance is effectively dispersed, and the noise generated by resonance in the air flow conveying process is avoided; a plurality of first inserting pipes 3 communicated with the second chamber are arranged in the first chamber; a plurality of second insertion tubes 4 communicated with the third chamber are arranged in the second chamber; an air outlet pipe 5 communicated with the first chamber is further arranged outside the main shell 1.

The utility model discloses a single-inlet single-outlet silencer, through the waste gas mouth of intake pipe 2 access generating set, the waste gas stream has sufficient formation through intake pipe 2 and passes third chamber and the second chamber in the process of entering first chamber, can tentatively step down the amortization to the air current; the first chamber and the second chamber are both used as a resistance and resistance composite chamber, and after airflow enters the first chamber, the airflow can be refracted and reflected in the first chamber to absorb a part of sound energy, particularly medium-high frequency sound waves, so that audible sound components in a frequency spectrum are obviously reduced. The middle and low frequency noise can be reflected back and forth for multiple times in the resistive and resistive composite cavity and cannot pass through the resistive and resistive composite cavity, so that most of the middle and low frequency noise is eliminated. After the airflow enters the second chamber from the first chamber, further refraction and reflection occur to reduce noise. The airflow through the two resistive and resistive composite chambers causes most of the noise to be absorbed, allowing only a small portion of the noise to enter the third chamber. The third chamber acts as a resistive chamber, absorbing residual acoustic energy as the air stream enters. The air current gets into through horizontal intake pipe 2 and then once passes through first cavity, second cavity and third cavity, guarantees that the air current has sufficient passageway stroke in the silencer, and the rational utilization space reduces the volume to account for the ratio simultaneously, adopts the mode of multistage noise elimination gradually to improve noise elimination effect promptly, has reduced exhaust back pressure simultaneously, accords with small-size generating set's afterbody noise elimination demand.

As an implementation mode, the air inlet pipe 2, the first insertion pipe 3, the second insertion pipe 4 and the air outlet pipe 5 are all arranged along the horizontal direction, the air outlet of the first insertion pipe 3 and the air inlet of the second insertion pipe 4 are arranged in a staggered manner, and the air outlet of the second insertion pipe 4 and the air inlet of the air outlet pipe 5 are arranged in a staggered manner, so that in the process that air flow enters the second chamber and enters the third chamber from the second chamber after the first chamber enters the second chamber, an air flow mutation interface is generated due to the pipeline fall, so that the sound resistance and resistance mutation are caused, sound waves are reflected back and forth, and the sound absorption effect is improved.

Specifically, referring to fig. 3, two first insertion pipes 3 and two second insertion pipes 4 are provided, and the two first insertion pipes 3, the two second insertion pipes 4, and the air inlet pipe 2 are all distributed around the axis of the main housing 1, so that an air flow abrupt interface is generated due to a pipeline fall in the air flow conveying process, and the time of the air flow in the corresponding chamber is increased to absorb sound waves as much as possible.

Preferably, the air inlet ends of the first inserting pipe 3, the second inserting pipe 4 and the air outlet pipe 5 are all in a flaring shape, so that the normal conveying of air flow is ensured so as to absorb and reduce noise.

In one embodiment, the first chamber and the second chamber, and the second chamber and the third chamber are separated by a solid partition plate 6, and the first chamber, the second chamber and the third chamber are separated into independent chambers by the solid partition plate 6.

Specifically, an inner shell 7 spaced from the inner wall of the main shell 1 is arranged in each of the third chamber, the second chamber and the first chamber, and a first sound absorption layer 8 is filled between the inner shell 7 and the main shell 1. The ventilative mesh of evenly distributed has been seted up on interior casing 7, guarantees that the air current can pass interior casing 7 and first sound absorbing layer 8 abundant contact, improves the sound absorbing effect, reduces the backpressure simultaneously.

In addition, perforated plates 9 are arranged at the head end and the tail end of the inner cavity of the main shell 1 and at the two sides of the solid partition plate 6; the gap between the main shell 1 and the perforated plate 9 and the gap between the solid partition plate 6 and the perforated plate 9 are filled with a second sound absorption layer 10. The plate surface of the perforated plate 9 is provided with air-permeable meshes which are uniformly distributed, so that the air flow can penetrate through the perforated plate 9 to fully contact with the second sound absorption layer 10 in the transverse flowing process in the corresponding cavity, and sound energy can be absorbed.

The solid partition plate 6 and the perforated plate 9 are arranged along the direction perpendicular to the cross section of the main shell 1, so that the air flow can be turned back for many times in the corresponding cavity, and the sound absorption efficiency is improved.

Preferably, the first sound absorbing layer 8 and the second sound absorbing layer 10 are both made of glass fiber cotton.

As an embodiment, the main housing 1 is formed by welding and assembling a circular cylinder and end plates at two ends; and a plurality of bottom reinforcing ribs 11 are arranged at the joint of the end plate and the circular cylinder body at the rear end along the circumferential direction. Because the air current enters into first cavity in-process from intake pipe 2, the air current flow direction takes place to turn, consequently can produce great pressure to the end plate of rear end, consequently through installing 11 increases of bottom strengthening rib with circular cylinder joint strength additional.

As an embodiment mode, the outer surface of the end plate of the front section is further provided with a hanging ring 12, so that the hanging is convenient to hoist in the assembling process.

The single-inlet single-outlet silencer designed by the invention can meet the noise reduction requirement of a small-sized generator set with civil-grade power of 1500 below, and in order to further verify the actual noise reduction effect of the single-inlet single-outlet silencer, the single-inlet single-outlet silencer which is actually applied to the generator set is tested, and the following test data are obtained by referring to fig. 5:

watch 1

The tests are carried out under closed conditions, and the data are obtained after the test by using ACUPRO software, so that the single-inlet single-outlet silencer designed by the invention has a good noise reduction effect, and the actually reduced frequency exceeds a standard value under the test condition of the inlet frequency of 100Hz-2000Hz, and meets the noise reduction requirement of a generator set.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-inlet single-outlet silencer comprises a main shell (1), wherein a third chamber, a second chamber and a first chamber are sequentially separated from the inner cavity of the main shell (1) along the length direction; the air inlet pipe (2) is arranged outside the main shell (1) and sequentially and horizontally penetrates through the three chambers and the second chamber and extends into the first chamber; the rear end of the air inlet pipe (2) is provided with a mounting plate (2.1), the mounting plate (2.1) is provided with a central branch pipe (2.2) positioned on an axis and a plurality of external branch pipes (2.3) distributed around the central branch pipe (2.2); a plurality of first inserting pipes (3) communicated with the second chamber are arranged in the first chamber; a plurality of second inserting pipes (4) communicated with the third chamber are arranged in the second chamber; an air outlet pipe (5) communicated with the first chamber is further arranged outside the main shell (1).

2. The single-inlet single-outlet muffler according to claim 1, wherein the inlet pipe (2), the first insert pipe (3), the second insert pipe (4) and the outlet pipe (5) are all arranged along a horizontal direction, an exhaust port of the first insert pipe (3) and an air inlet of the second insert pipe (4) are arranged in a staggered manner, and an exhaust port of the second insert pipe (4) and an air inlet of the outlet pipe (5) are arranged in a staggered manner.

3. The single-in single-out muffler according to claim 2, wherein the inlet ends of the first insert pipe (3), the second insert pipe (4) and the outlet pipe (5) are flared.

4. The single-in single-out muffler of claim 1, wherein the first chamber and the second chamber, and the second chamber and the third chamber are separated by a solid partition plate (6).

5. The single-in single-out muffler according to claim 4, wherein an inner shell (7) spaced from the inner wall of the main shell (1) is arranged in each of the third chamber, the second chamber and the first chamber, and a first sound absorption layer (8) is filled between the inner shell (7) and the main shell (1).

6. The single-inlet single-outlet silencer according to claim 5, wherein the head and tail ends of the inner cavity of the main shell (1) and two sides of the solid partition plate (6) are provided with perforated plates (9); and a gap between the main shell (1) and the perforated plate (9) and a gap between the solid partition plate (6) and the perforated plate (9) are filled with a second sound absorption layer (10).

7. The single-in single-out muffler according to claim 6, wherein the solid partition (6) and the perforated plate (9) are both arranged in a direction perpendicular to the cross-sectional direction of the main housing (1).

8. The single-in single-out muffler according to claim 6, wherein the first sound absorbing layer (8) and the second sound absorbing layer (10) are both glass fiber wool.

9. The single-in single-out muffler according to any one of claims 1 to 8, wherein the main housing (1) is assembled by welding a circular cylinder and end plates at both ends; and a plurality of bottom reinforcing ribs (11) are arranged at the joint of the end plate and the circular cylinder body at the rear end along the circumferential direction.

10. The single-in single-out muffler of claim 9, wherein the outer surface of the end plate of the front section is further provided with a hanging ring (12).