CN112814762A

CN112814762A - Full-band noise silencer

Info

Publication number: CN112814762A
Application number: CN201911121737.8A
Authority: CN
Inventors: 何刚; 彭振兴
Original assignee: Changsha Ber Environmental Protection Co ltd
Current assignee: Changsha Ber Environmental Protection Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2021-05-18

Abstract

The invention relates to a silencing device, in particular to a full-band noise silencer, which comprises a pressure equalizing pipe, a first silencing assembly and a second silencing assembly, wherein the pressure equalizing pipe, the first silencing assembly and the second silencing assembly are sequentially communicated, the first silencing assembly comprises a plurality of silencing chambers with different natural frequencies and pipelines penetrating through the silencing chambers, and through holes are formed in the pipelines in the silencing chambers. The invention has novel design, effectively avoids the generation of secondary noise through the arranged buffer chamber, realizes the elimination of sound waves with different frequencies by the arranged effect chambers with different inherent frequencies, and has good silencing effect.

Description

Full-band noise silencer

Technical Field

The invention relates to a silencing device, in particular to a full-band noise silencer.

Background

At present, people pay more and more attention to environmental protection, and a great deal of manpower, material resources and financial resources are invested in the treatment of noise pollution of engine exhaust, noise in other related fields and the like. The exhaust muffler on the market at present has a single structural design and certain defects: the main elements of the silencer adopt simple impedance composite silencing pieces, so that the silencer has poor silencing effect, cannot well meet the requirements of customers and cannot reach the national environmental protection standard; secondly, the traditional low-frequency silencer only has a larger effect on the noise in a certain frequency range, and has a smaller effect on the noise control over the frequency in the certain frequency range. The traditional low-frequency expanding silencer only has an effect on noise in a certain section of frequency range of the small-caliber interface, and has a small effect on noise control of the section of frequency of the large-caliber interface.

Disclosure of Invention

The present invention is directed to a full-band noise muffler to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a full frequency channel noise silencer, includes pressure-equalizing pipe, first amortization subassembly and second amortization subassembly, pressure-equalizing pipe, first amortization subassembly and second amortization subassembly communicate in proper order, and wherein, first amortization subassembly includes a plurality of different natural frequency's amortization room and runs through a plurality ofly the pipeline of amortization room is located be provided with the clearing hole on the pipeline in the amortization room.

As a further scheme of the invention: the two ends of the first silencing assembly are provided with buffer chambers.

As a still further scheme of the invention: and one end of the pressure equalizing pipe, which is far away from the buffer chamber, is provided with an interface.

As a still further scheme of the invention: one end, far away from the interface, of the pressure equalizing pipe is in a sealing state, and a plurality of through holes are formed in the pressure equalizing pipe located in the buffer chamber.

As a still further scheme of the invention: the buffer chamber comprises a keel frame and a shell, and a sound absorption layer is filled between the keel frame and the shell.

As a still further scheme of the invention: the second amortization subassembly includes shell and perforated plate, the perforated plate is installed in the shell, and the keel frame is installed to the centre of shell, and it has the sound absorbing layer to fill between the inner wall of shell and the keel frame.

As a still further scheme of the invention: the sound absorption layer is arranged in a closed loop structure.

Compared with the prior art, the invention has the beneficial effects that: the invention has novel design, effectively avoids the generation of secondary noise through the arranged buffer chamber, realizes the elimination of sound waves with different frequencies by the arranged effect chambers with different inherent frequencies, and has good silencing effect.

Drawings

Fig. 1 is a front view of a full band noise muffler.

Fig. 2 is a side view of a full band noise muffler.

Fig. 3 is a top view of a full band noise muffler.

Fig. 4 is a front view showing a state where a pressure equalizing pipe is connected to a buffer chamber in the full band noise muffler.

Fig. 5 is a side view showing a state where a pressure equalizing pipe and a buffer chamber are connected in the full band noise muffler.

Fig. 6 is a top view of the connection state of the pressure equalizing pipe and the buffer chamber in the full-band noise muffler.

Fig. 7 is a cross-sectional view taken along the line a-a in fig. 4.

FIG. 8 is a front view of a first muffler assembly in a full band noise muffler.

FIG. 9 is a side view of a first muffler assembly in a full band noise muffler.

FIG. 10 is a top view of a first muffler assembly in a full band noise muffler.

Fig. 11 is a cross-sectional view taken along the line a-a in fig. 8.

FIG. 12 is a front view of a second muffler assembly in a full band noise muffler.

FIG. 13 is a side view of a second muffler assembly in a full band noise muffler.

FIG. 14 is a top view of a second muffler assembly in a full band noise muffler.

Fig. 15 is a cross-sectional view taken along the line a-a in fig. 12.

In the figure: 1-interface, 2-pressure equalizing pipe, 3-first silencing component, 4-second silencing component, 5-pipeline, 6-silencing chamber, 8-perforated plate, 9-keel frame, 10-sound absorption layer, 11-buffer chamber and 13-shell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 15, in an embodiment of the present invention, a full-band noise muffler includes a pressure equalizing pipe 2, a first silencing component 3, and a second silencing component 4, where the pressure equalizing pipe 2, the first silencing component 3, and the second silencing component 4 are sequentially communicated, where the first silencing component 3 includes a plurality of silencing chambers 6 with different natural frequencies and a pipe 5 penetrating through the plurality of silencing chambers 6, and a through hole is formed in the pipe 5 located in the silencing chamber 6, and the through hole is used to implement sound wave cancellation of the current natural frequency of the silencing chamber.

In the embodiment of the invention, the elimination of sound waves with different frequencies is realized by arranging the effect chambers 6 with different natural frequencies, and the silencing effect is good.

As an embodiment of the present invention, both ends of the first sound-deadening assembly 3 are provided with buffer chambers 11, so as to generate secondary noise from the air flows flowing out of the pressure-equalizing pipe 2 and the first sound-deadening assembly 3.

As an embodiment of the present invention, an interface 1 is installed at one end of the pressure equalizing tube 2 away from the buffer chamber 11, and one end of the pressure equalizing tube 2 away from the interface 1 is in a sealed state, a plurality of through holes are provided on the pressure equalizing tube 2 located in the buffer chamber 11, and when an air flow enters the pressure equalizing tube 2 through the interface 1, the air flow enters the buffer chamber 11 through the through holes on the pressure equalizing tube 2.

As an embodiment of the present invention, the buffer chamber 11 includes a keel frame 9 and a shell 13, a sound absorption layer 10 is filled between the keel frame 9 and the shell 13, and the sound absorption layer 10 plays a role of preliminary sound attenuation.

As an embodiment of the invention, the second silencing component 4 comprises a shell 13 and a perforated plate 8, the perforated plate 8 is installed in the shell 13, a keel frame 9 is installed in the middle of the shell 13, a sound absorption layer 10 is filled between the inner wall of the shell 13 and the keel frame 9, and sound is attenuated through holes in the perforated plate 8 and the sound absorption layer 10.

In this embodiment, the sound absorption layer 10 is arranged in a closed loop structure, so as to wrap the shell 13 and the keel frame 9, thereby improving the silencing effect.

In the present embodiment, the sound absorbing layer 10 is made of various organic or inorganic fibers of fibrous aggregate structure and products thereof, and a porous-structured waterproof glass wool felt of polymer.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a full frequency channel noise silencer, includes pressure-equalizing pipe (2), first amortization subassembly (3) and second amortization subassembly (4), its characterized in that, pressure-equalizing pipe (2), first amortization subassembly (3) and second amortization subassembly (4) communicate in proper order, and wherein, first amortization subassembly (3) include a plurality of different natural frequency's amortization room (6) and run through a plurality ofly pipeline (5) of amortization room (6) are located be provided with the clearing hole on pipeline (5) in amortization room (6).

2. The full band noise muffler according to claim 1, wherein the first muffler assembly (3) is provided with a buffer chamber (11) at both ends.

3. A full band noise muffler according to claim 2, characterized in that the end of the pressure equalizing pipe (2) remote from the buffer chamber (11) is fitted with a mouthpiece (1).

4. The full-band noise muffler according to claim 3, wherein one end of the pressure equalizing pipe (2) far away from the interface (1) is in a sealed state, and a plurality of through holes are arranged on the pressure equalizing pipe (2) in the buffer chamber (11).

5. The full band noise muffler according to claim 2, wherein the buffer chamber (11) comprises a keel frame (9) and an outer shell (13), and a sound absorbing layer (10) is filled between the keel frame (9) and the outer shell (13).

6. The full-band noise muffler according to claim 1, wherein the second muffler assembly (4) comprises a housing (13) and a perforated plate (8), the perforated plate (8) is installed in the housing (13), a keel frame (9) is installed in the middle of the housing (13), and a sound absorbing layer (10) is filled between the inner wall of the housing (13) and the keel frame (9).

7. The full band noise muffler according to claim 6, wherein the sound absorbing layer (10) is provided in a closed loop configuration.