CN218293684U

CN218293684U - Go up into down and go out silencer

Info

Publication number: CN218293684U
Application number: CN202222558936.9U
Authority: CN
Inventors: 成忠虎; 刘用国
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: 2023-01-13
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to the technical field of silencers, in particular to a top-in bottom-out 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, and the upper side and the lower side of the front end of the main shell are respectively provided with an air inlet pipe group and an exhaust pipe; the outer end of the air inlet pipe is bent upwards, and the inner end of the air inlet pipe penetrates through the third chamber and the second chamber in sequence and is communicated with the first chamber. The air inlet pipe group is arranged to increase the air flow stroke, so that the air flow can be fully reduced in the three chambers, and the space layout is reasonably utilized to reduce the whole volume ratio. The air current passes through the in-process of first cavity, second cavity and third cavity in proper order, can all take place many times in each cavity and refract the reflection to fully absorb the sound wave, guarantee the noise reduction effect.

Description

Go up into down and go out silencer

Technical Field

The utility model relates to a silencer technical field specifically is an go up into silencer down.

Background

A muffler is a device that can block sound transmission and allow airflow to pass through, and is an important component for reducing the exhaust noise of an internal combustion engine, and the performance of the muffler directly affects 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.

For the huge airflow and noise generated by the operation of industrial large generator sets, a silencer is generally needed to eliminate the noise in the aerodynamic force, prevent sound transmission and reduce the noise while allowing the airflow to pass through. When an industrial-grade large generator set operates, noise needs to be eliminated through an industrial-grade silencer.

In the operation process of the industrial muffler, in order to ensure the silencing effect, enough silencing channels need to be reserved in the inner cavity of the muffler, but the reserved overlong channels can cause the volume of the whole muffler to be overlarge and inconvenient to assemble. If a small-caliber conveying pipeline is adopted in a mode of returning and silencing in an inner cavity of a silencer, although the air flow stroke can be increased, aiming at high-pressure air flow generated by the operation of a large generator set, the small-caliber conveying pipeline is excessively large in pressure and is easy to resonate in a conveying cavity to generate new noise, and finally, the back pressure is excessively high and is not in line with the requirement of silencing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide one kind and go into down the silencer and solve above-mentioned industrial silencer volume too big or press in too high and lead to the poor problem of noise elimination effect.

The utility model provides an above-mentioned technical problem's technical scheme as follows: an upper inlet and lower outlet silencer comprises a main shell, wherein an inner cavity of the main shell is sequentially divided into a third chamber, a second chamber and a first chamber along the length direction, and an air inlet pipe group and an exhaust pipe are respectively arranged on the upper side and the lower side of the front end of the main shell; the outer end of the air inlet pipe is bent upwards, and the inner end of the air inlet pipe penetrates through the third chamber and the second chamber in sequence and is communicated with the first chamber; the exhaust pipe is communicated with the third chamber; a plurality of conducting pipe groups communicated with the second chamber are arranged in the first chamber; a plurality of inserting pipes communicated with the third chamber are arranged in the second chamber;

the air inlet pipe group and the conduction pipe group respectively comprise an inner mesh pipe body, a first silencing layer, a tightening layer and an outer pipe body which are sequentially arranged from inside to outside.

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

Further, the inner mesh pipe body is made of PVC, and meshes which are uniformly distributed are formed in the surface of the inner mesh pipe body.

Further, the tight hoop layer is an iron sheet coated outside the first silencing layer.

Further, the outer pipe body is a stainless steel pipe or an iron pipe.

Further, the exhaust port of the conducting pipe group and the air inlet of the inserting pipe are arranged in a staggered manner; and the exhaust port of the insert pipe and the air inlet of the exhaust pipe are arranged in a staggered manner.

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

Further, an inner shell which is separated from the inner wall of the main shell is arranged in each of the first chamber, the second chamber and the third chamber; and a second silencing layer is filled between the main shell and the inner shell.

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 third sound-absorbing layer.

Furthermore, the first noise elimination layer, the second noise elimination layer and the third noise elimination layer are all 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.

The beneficial effects of the utility model are that:

1) The utility model relates to a go up into silencer down, through the stroke that the air intake nest of tubes that sets up increased the air current for the air current can fall the noise fully in three cavity, and rational utilization spatial layout has reduced whole volume and has accounted for the ratio. The air current passes through the in-process of first cavity, second cavity and third cavity in proper order, can all take place many times in each cavity and reflect to fully absorb the sound wave, guarantee noise reduction effect

2) The utility model relates to a go up into silencer down, can regard as high-power generating set noise elimination to handle, the air intake nest of tubes all adopts multilayer composite design with switching on the nest of tubes, guarantee the air current transportation in-process, mesh body and first noise elimination layer contact in partial air current can pass to carry out amortization and step-down to this part air current, can avoid the pipeline to press too big and take place to resonate and produce new noise, also can disperse the air current resistance and reduce the backpressure, guarantee better noise elimination effect under the whole volume of reasonable control.

Drawings

FIG. 1 is a sectional view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the section A of FIG. 1 according to the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

fig. 4 is a cross-sectional view taken along line B-B of fig. 1.

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

1. the main casing body, 2, air inlet pipe group, 2.1, internal mesh hole body, 2.2, first noise elimination layer, 2.3, lock ring layer, 2.4, outer body, 3, blast pipe, 4, switch-on pipe group, 5, insert tube, 6, rings, 7, real baffle, 8, inner casing, 9, second noise elimination layer, 10, perforated plate, 11, third noise elimination layer, 12, bottom strengthening rib.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present 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. To those of ordinary skill in the art, the specific meaning of such terms in this patent may be understood as appropriate.

As shown in fig. 1 and 2, the upper inlet and lower outlet muffler of the present invention comprises a main housing 1, 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, and an air inlet pipe group 2 and an exhaust pipe 3 are respectively arranged on the upper side and the lower side of the front end of the main housing 1; the outer end of the air inlet pipe group 2 is bent upwards, and the inner end of the air inlet pipe group penetrates through the third chamber and the second chamber in sequence and is communicated with the first chamber; the exhaust pipe 3 is communicated with the third chamber; a plurality of conducting pipe groups 4 communicated with the second chamber are arranged in the first chamber; a plurality of insertion tubes 5 communicating with the third chamber are provided in the second chamber.

The utility model discloses a go up into down and go out silencer increases the stroke of air current through the air intake stack 2 that sets up for the air current can fall fully and make an uproar in three cavity, and rational utilization spatial layout has reduced whole volume and has accounted for the ratio. The air current passes through the in-process of first cavity, second cavity and third cavity in proper order, can all take place many times in each cavity and refract the reflection to fully absorb the sound wave, guarantee the noise reduction effect.

Specifically, air intake nest of tubes 2 and switch on nest of tubes 4 and all include from inside to outside interior mesh body 2.1, first noise elimination layer 2.2, lock hoop layer 2.3 and outer body 2.4 that set gradually. The air inlet pipe group 2 and the conducting pipe group 4 are both in multilayer composite design, and in the process of air flow conveying, partial air flow can pass through the inner mesh pipe body 2.1 to be in contact with the first noise elimination layer 2.2, so that the partial air flow is subjected to noise elimination and pressure reduction, the phenomenon that the pipeline is excessively pressed to generate new noise due to resonance can be avoided, the air flow resistance can be dispersed, the back pressure is reduced, and the better noise elimination effect is ensured under the reasonable control of the whole volume.

In addition, because the outer end of air intake stack 2 is the bending upwards to form a crooked air flue, will take place once to turn back by a wide margin in the department of buckling when guaranteeing that the air current passes through, make the medium and high frequency sound wave carry out preliminary absorption by the first noise elimination layer 2.2 of department of buckling, promote decompression and noise cancelling effect.

As an embodiment, the inner mesh tube body 2.1 is made of PVC, and the surface thereof is provided with uniformly distributed meshes, so as to ensure that the airflow passes through and contacts the first silencing layer 2.2.

The tight hoop layer 2.3 is an iron sheet wrapped outside the first silencing layer 2.2, and the first silencing layer 2.2 is tightly attached to the outer surface of the inner mesh pipe body 2.1 in an iron sheet winding mode, so that a better silencing effect is guaranteed.

The outer tube 2.4 is a stainless steel or iron tube providing sufficient compressive strength.

In one embodiment, the exhaust port of the conducting tube group 4 and the intake port of the insertion tube 5 are arranged in a staggered manner; the exhaust port of the inserting pipe 5 and the air inlet of the exhaust pipe 3 are distributed in a staggered mode, so that after air flow enters the second chamber from the first chamber and in the process of entering the third chamber from the second chamber, due to the fact that air flow sudden change interfaces are generated due to the difference of pipelines, the sound resistance and the resistance are sudden, sound waves are reflected back and forth, and the sound absorption effect is improved.

Preferably, referring to fig. 3 and 4 in particular, the conducting tube set 4 and the inserting tube 5 are provided in two sets, and the air inlet tube set 2, the conducting tube set 4 and the inserting tube 5 are distributed around the central axis of the main casing 1, so as to ensure that there is a pipe fall in the air flow transportation process to generate an air flow abrupt interface, and increase the residence time of the air flow in the corresponding chamber, so as to absorb sound waves as much as possible

In one embodiment, the first chamber and the second chamber, and the second chamber and the third chamber are separated by a solid partition 7, and the first chamber, the second chamber and the third chamber are separated into independent chambers by the solid partition 7.

Specifically, the first chamber, the second chamber and the third chamber are internally provided with an inner shell 8 which is separated from the inner wall of the main shell 1; it has second noise elimination layer 9 to fill between main casing body 1 and the interior casing 8, has seted up evenly distributed's ventilative mesh on the interior casing 8, guarantees that the air current can pass interior casing 7 and second noise elimination layer 9 abundant contact, provides noise elimination effect, reduces the backpressure simultaneously.

In addition, the head end and the tail end of the inner cavity of the main shell 1 and two sides of the solid partition 7 are provided with perforated plates 10; the gap between the main shell 1 and the perforated plate 10 and the gap between the solid partition 7 and the perforated plate 10 are filled with a third sound-absorbing layer 11. The board of the perforated plate 10 is provided with air-permeable meshes which are uniformly distributed, so that the air flow can penetrate through the perforated plate 10 to fully contact with the perforated plate 10 in the transverse flow process in the corresponding chamber, and the sound energy can be absorbed.

Preferably, the first sound-deadening layer 2.2, the second sound-deadening layer 9 and the third sound-deadening layer 11 are all 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 12 are arranged at the joint of the end plate and the circular cylinder body at the rear end along the circumferential direction. As the air flow turns in the process of entering the first chamber from the air inlet pipe group 2, a large pressure is generated on the end plate at the rear end, and the connection strength with the circular cylinder is increased by additionally arranging the bottom reinforcing rib 12.

In addition, the outer surface of the end plate at the front section is also provided with a hanging ring 6, so that the lifting is convenient in the assembling process.

The upper inlet and lower outlet silencer designed by the invention can meet the noise reduction requirement of a medium-large generator set with industrial-grade 1500-200KW power, and in order to further verify the actual noise reduction effect of the upper inlet and lower outlet silencer, the upper inlet and lower outlet silencer which is actually applied to the generator set is tested, and the following test data are obtained:

watch 1

Watch 2

The tests are carried out under a closed condition, and the data are obtained after the ACUPRO software test, so that the top-in bottom-out 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 the generator set.

The above description is only for the 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. An upper inlet and lower outlet silencer comprises a main shell (1), wherein an inner cavity of the main shell (1) is sequentially divided into a third chamber, a second chamber and a first chamber along the length direction, and is characterized in that the upper side and the lower side of the front end of the main shell (1) are respectively provided with an air inlet pipe group (2) and an exhaust pipe (3); the outer end of the air inlet pipe group (2) is bent upwards, and the inner end of the air inlet pipe group penetrates through the third chamber and the second chamber in sequence and is communicated with the first chamber; the exhaust pipe (3) is communicated with the third chamber; a plurality of conducting pipe groups (4) communicated with the second chamber are arranged in the first chamber; a plurality of inserting pipes (5) communicated with the third chamber are arranged in the second chamber;

air intake nest of tubes (2) and switch on nest of tubes (4) and all include interior mesh body (2.1), first noise elimination layer (2.2), lock hoop layer (2.3) and outer body (2.4) that set gradually from inside to outside.

2. The upper inlet and lower outlet muffler according to claim 1, wherein the inner mesh pipe body (2.1) is made of PVC and has uniformly distributed meshes on the surface.

3. The top-in bottom-out muffler according to claim 2, characterized in that the hoop layer (2.3) is an iron sheet wrapped outside the first sound-deadening layer (2.2).

4. The top-in bottom-out muffler according to claim 2, characterized in that the outer pipe body (2.4) is a stainless steel or iron pipe.

5. The upper inlet and lower outlet muffler according to claim 1, wherein the outlet of the conducting pipe group (4) and the inlet of the insert pipe (5) are arranged in a staggered manner; and the exhaust port of the insert pipe (5) and the air inlet of the exhaust pipe (3) are arranged in a staggered manner.

6. The top-in bottom-out muffler according to 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 (7).

7. The top-in bottom-out muffler according to claim 6, wherein the first chamber, the second chamber and the third chamber are provided therein with an inner shell (8) spaced from the inner wall of the main housing (1); and a second silencing layer (9) is filled between the main shell (1) and the inner shell (8).

8. The upper inlet and lower outlet muffler according to claim 6, wherein the head and tail ends of the inner cavity of the main housing (1) and both sides of the solid partition (7) are provided with perforated plates (10); and a gap between the main shell (1) and the perforated plate (10) and a gap between the solid partition plate (7) and the perforated plate (10) are filled with a third sound-absorbing layer (11).

9. An up-in-down muffler according to claim 8, characterized in that the first (2.2), second (9) and third (11) muffling layers are all glass fiber wool.

10. The top-in bottom-out muffler according to any of claims 1-9, 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 (12) are arranged at the joint of the end plate and the circular cylinder body at the rear end along the circumferential direction.