CN217633161U

CN217633161U - Full-frequency annular tube array type silencer

Info

Publication number: CN217633161U
Application number: CN202221559225.7U
Authority: CN
Inventors: 欧阳治军; 任中正
Original assignee: Changsha Zhonghuan Environmental Technology Engineering Co ltd
Current assignee: Changsha Zhonghuan Environmental Technology Engineering Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-10-21
Anticipated expiration: 2032-06-21

Abstract

The utility model discloses a full annular shell and tube muffler of frequency, it relates to noise pollution prevention and cure field, aim at solving the sound wave that current fan silencer majority can only absorb a certain specific frequency and wavelength, the relatively poor problem of sound absorption effect of other frequencies and wavelength, its technical scheme main points are that reducer pipe end intercommunication is provided with syllable-dividing casing, the inside fixed shell and tube installing support that is provided with in syllable-dividing casing both ends laminating, fixed mounting has high frequency noise to absorb shell and tube and low frequency noise absorption shell and tube between the different shell and tube installing supports, high frequency noise absorbs shell and tube and low frequency noise absorption shell and tube along the setting of syllable-dividing casing length direction, reached and carried out all-round absorption to full frequency noise, the effect of effective control noise.

Description

Full-frequency annular tube array type silencer

Technical Field

The utility model belongs to the technical field of the technique of noise pollution prevention and cure and specifically relates to a full annular shell and tube muffler is related to.

Background

The blower is a short-term common habit of gas compression and gas transmission machinery in China, the blower generally comprises a ventilator, a blower and a wind driven generator, the gas compression and gas transmission machinery is a machinery for converting rotary mechanical energy into gas pressure energy and kinetic energy and transmitting gas out, and main structural components of the blower are an impeller, a shell, an air inlet, a bracket, a motor, a belt pulley, a coupling, a transmission part (bearing) and the like.

The noise generated by the fan is one of the main objects of noise pollution, and the noise treatment measure of the fan is to add a silencer to reduce the noise decibel, wherein the silencer is a device for preventing sound transmission and allowing airflow to pass through, and is internally provided with a silencing device and a silencing material, which is an important measure for eliminating aerodynamic noise, and the silencer is generally installed on an airflow channel of the fan to reduce noise.

The above prior art solutions have the following drawbacks: most of existing fan silencers can only absorb sound waves of a certain specific frequency and wavelength, and the sound absorption effect of other frequencies and wavelengths is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a full annular shell and tube muffler.

In order to achieve the above purpose, the utility model provides a following technical scheme:

including the reducing pipe, reducing pipe end intercommunication is provided with syllable-dividing casing, the casing both ends laminating inside fixed row of being provided with of giving sound insulation is managed the installing support, fixed mounting has high frequency noise to absorb tubulation and low frequency noise to absorb tubulation between the different tubulation installing supports, high frequency noise absorbs tubulation and low frequency noise and absorbs tubulation and sets up along the casing length direction that gives sound insulation

Through adopting above-mentioned technical scheme, the casing that gives sound insulation can effectively avoid the noise in the noise fan air flow pipeline to leak, improves the whole noise reduction effect of muffler, settles the muffler that has high frequency noise absorption tubulation and high frequency noise absorption tubulation simultaneously and can carry out all-round absorption to full frequency noise effectively, and noise control effect is showing and is promoting.

Furthermore, the sound insulation shell is internally filled with a sound insulation layer, and the inner wall of the sound insulation shell is a microporous metal plate.

By adopting the technical scheme, the fan noise can be effectively absorbed by the micropore metal plate matched with the noise reduction layer, and the fan noise is prevented from leaking.

Further, a perforation section of thick bamboo and the outer perforation section of thick bamboo of high frequency in the high frequency noise absorption tubulation includes the high frequency, perforation section of thick bamboo periphery equidistance sets up in the outer perforation section of thick bamboo inboard of high frequency in the high frequency, the outer perforation section of thick bamboo both ends lid of high frequency closes in the high frequency perforation section of thick bamboo and the outer perforation section of thick bamboo intermediate layer of high frequency and is provided with evagination annular end cap, perforation section of thick bamboo both ends fixed connection evagination annular end cap setting in the outer high frequency, the intermediate layer is filled between the outer perforation section of thick bamboo of high frequency and the perforation section of thick bamboo in the high frequency and is provided with the low unit weight sound absorber, the perforation of the outer perforation section of thick bamboo of high frequency and high frequency is the large aperture and perforates.

Through adopting above-mentioned technical scheme, the resonance absorption peak of a perforation section of thick bamboo and the outer perforation section of thick bamboo of high frequency is located the high frequency region in the perforation of large aperture fenestrate high frequency, and low volume weight sound absorber reduces for porous sound absorbent volume weight, and trompil aperture and perforation rate improve, and resonance absorption peak shifts to the high frequency region, has good absorption effect to high frequency noise, and evagination annular end cap has good air current direction reposition of redundant personnel effect, and the friction shock degree between with the air current reduces, and the noise diminishes.

Further, the low-frequency noise absorption tube array comprises a low-frequency inner perforated tube and a low-frequency outer perforated tube, the periphery of the low-frequency inner perforated tube is arranged on the inner side of the low-frequency outer perforated tube in an equidistance mode, two ends of the low-frequency outer perforated tube are covered with outer convex spherical plugs, two ends of the low-frequency inner perforated tube are fixedly connected with the outer convex spherical plugs, a medium-high volume-weight sound absorber is filled in the low-frequency inner perforated tube, and the low-frequency inner perforated tube and the low-frequency outer perforated tube are perforated in small aperture.

By adopting the technical scheme, the resonance absorption peak of the low-frequency inner perforated cylinder and the low-frequency outer perforated cylinder with small apertures is positioned in a medium-low frequency region, the sound absorber with medium and high volume weight is made of porous sound absorption material, the volume weight is increased, the aperture of the perforated hole and the perforation rate are reduced, the resonance absorption peak moves to the medium-low frequency region, the medium and low frequency noise has good absorption effect, meanwhile, the cavity formed between the low-frequency inner perforated cylinder and the low-frequency outer perforated cylinder can further improve the absorption effect of the medium and low frequency noise, the friction vibration degree between the air flows of the convex spherical plug is reduced, and the noise is reduced.

To sum up, the utility model discloses a beneficial technological effect does:

1. the high-frequency noise absorption array tubes and the low-frequency noise absorption array tubes are adopted, so that the effect of comprehensively absorbing noise with different frequencies and improving noise reduction is achieved;

2. the convex annular plug and the convex spherical plug are adopted, so that the effect of reducing the friction vibration degree between the convex annular plug and the air flow and controlling the noise is achieved.

Drawings

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

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is an enlarged view of the part A of FIG. 2;

fig. 4 is an enlarged schematic view of the part B in fig. 2.

In the figure, 1, a reducer pipe; 2. a sound-insulating housing; 3. mounting a bracket; 4. a high frequency noise absorbing array; 41. a high frequency inner perforated cylinder; 42. a high frequency outer perforated cylinder; 43. an outward convex annular plug; 44. a low volume weight sound absorber; 5. a low frequency noise absorbing array tube; 51. a low frequency inner perforated cylinder; 52. a low frequency outer perforated cylinder; 53. an external spherical plug; 54. medium and high volume weight sound absorbers.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a full annular tubulation muffler that frequently, including reducing pipe 1, its characterized in that: the terminal intercommunication of reducer 1 is provided with syllable-dividing

casing

2, 2 both ends laminating inside fixed shell and tube installing support 3 that is provided with of syllable-dividing casing, fixed mounting has high frequency noise absorption shell and tube 4 and low frequency noise absorption shell and tube 5 between the different shell and tube installing support 3, high frequency noise absorption shell and tube 4 and low frequency noise absorption shell and tube 5 set up along 2 length direction of syllable-dividing casing, 2 inside fillings of syllable-dividing casing set up the noise damping layer, 2 inner walls of syllable-dividing casing are the micropore metal sheet, syllable-dividing casing 2 can effectively avoid the noise in the noise fan air flow pipeline to leak, improve the whole noise reduction effect of muffler, settle simultaneously has the muffler of high frequency noise absorption shell and tube 4 and can carry out all-round absorption to full frequency noise effectively, noise control effect is showing and is promoted.

Referring to fig. 2 and 3, the low-frequency noise absorbing array tube 5 includes a low-frequency inner perforated tube 51 and a low-frequency outer perforated tube 52, the periphery of the low-frequency inner perforated tube 51 is equidistantly disposed inside the low-frequency outer perforated tube 52, two ends of the low-frequency outer perforated tube 52 are covered with convex spherical plugs, two ends of the low-frequency inner perforated tube 51 are fixedly connected with the convex spherical plugs, the low-frequency inner perforated tube 51 is filled with a middle-high volume-weight sound absorber 54, the low-frequency inner perforated tube 51 and the low-frequency outer perforated tube 52 are perforated with small apertures, resonant absorption peaks of the low-frequency inner perforated tube 51 and the low-frequency outer perforated tube 52 with the small apertures are located in a middle-low frequency region, the middle-high volume-weight sound absorber 54 is made of a porous sound absorbing material, the volume weight is increased, the aperture and the perforation rate are reduced, the resonant absorption peaks are shifted to the middle-low frequency region, the middle-low-frequency noise absorbing effect is further improved, the frictional shock between the convex spherical plugs is reduced, and the noise is reduced.

Referring to fig. 3 and 4, the high frequency noise absorbing tubulation 4 comprises a high frequency inner perforated cylinder 41 and a high frequency outer perforated cylinder 42, the periphery of the high frequency inner perforated cylinder 41 is equidistantly arranged at the inner side of the high frequency outer perforated cylinder 42, two ends of the high frequency outer perforated cylinder 42 are covered with an outer protruded annular plug 43 arranged between the high frequency inner perforated cylinder 41 and the high frequency outer perforated cylinder 42, two ends of the outer high frequency inner perforated cylinder 41 are fixedly connected with the outer protruded annular plug 43, a low volume weight sound absorber 44 is filled between the high frequency inner perforated cylinder 41 and the high frequency outer perforated cylinder 42, the perforations of the high frequency inner perforated cylinder 41 and the high frequency outer perforated cylinder 42 are large-aperture perforations, the resonance absorption peak of the large-aperture perforated high frequency inner perforated cylinder 41 and the high frequency outer perforated cylinder 42 is positioned in the high frequency region, the low volume weight sound absorber 44 is a porous sound absorbing material, the perforation aperture and the perforation rate are improved, the resonance absorption peak is shifted to the high frequency region, the high frequency noise outer protruded annular plug 43 has good airflow guiding and the vibration diversion effect with the airflow is reduced and the noise is reduced.

The embodiment of this embodiment is the preferred embodiment of the present invention, not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a full annular shell and tube muffler, includes reducing pipe (1), its characterized in that: reducer pipe (1) end intercommunication is provided with syllable-dividing casing (2), syllable-dividing casing (2) both ends laminating inside fixed be provided with tubulation installing support (3), fixed mounting has high frequency noise to absorb tubulation (4) and low frequency noise to absorb tubulation (5) between different tubulation installing support (3), high frequency noise absorbs tubulation (4) and low frequency noise and absorbs tubulation (5) and set up along syllable-dividing casing (2) length direction.

2. The full band annular tubulation silencer according to claim 1, wherein: the sound insulation shell (2) is internally filled with a sound insulation layer, and the inner wall of the sound insulation shell (2) is a micropore metal plate.

3. The full band annular tubulation silencer according to claim 1, wherein: high frequency noise absorbs tubulation (4) and the outer perforation section of thick bamboo (42) of high frequency in perforation section of thick bamboo (41) in the high frequency, perforation section of thick bamboo (41) periphery equidistance sets up in the outer perforation section of thick bamboo (42) of high frequency inboardly, perforation section of thick bamboo (41) and the outer perforation section of thick bamboo (42) intermediate layer of high frequency are provided with evagination annular end cap (43) in the outer perforation section of thick bamboo (42) both ends lid closure high frequency of high frequency, perforation section of thick bamboo (41) both ends fixed connection evagination annular end cap (43) set up in the high frequency, the intermediate layer is filled and is provided with low volume weight acoustic absorber (44) between the outer perforation section of thick bamboo (42) of high frequency in the high frequency, perforation section of thick bamboo (41) and high frequency (42) are the large aperture perforation outside the high frequency.

4. The full band annular tubulation silencer according to claim 1, wherein: the low-frequency noise absorption tube nest (5) comprises a low-frequency inner perforated tube (51) and a low-frequency outer perforated tube (52), wherein the periphery of the low-frequency inner perforated tube (51) is equidistantly arranged on the inner side of the low-frequency outer perforated tube (52), two ends of the low-frequency outer perforated tube (52) are covered with convex spherical plugs, two ends of the low-frequency inner perforated tube (51) are fixedly connected with the convex spherical plugs, a high-medium-capacity-weight sound absorber (54) is filled in the low-frequency inner perforated tube (51), and the low-frequency inner perforated tube (51) and the low-frequency outer perforated tube (52) are perforated in a small aperture mode.