CN212081614U

CN212081614U - Spherical array impedance composite noise elimination structure

Info

Publication number: CN212081614U
Application number: CN202020415783.0U
Authority: CN
Inventors: 徐南; 张弛
Original assignee: Jiangsu Jianzhu Institute
Current assignee: Jiangsu Jianzhu Institute
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-04
Anticipated expiration: 2030-03-27

Abstract

The utility model discloses a compound noise-abatement structure of spherical array impedance, the spherical noise-abatement body includes perforated plate, microperforated plate, baffle and pipe, the baffle is circularly, circular baffle center trompil will the pipe penetrates in the hole of circular baffle center trompil and fixed, adopt eight little baffle equipartitions to be in circular baffle both sides are arranged with the circular array, and the spherical noise-abatement body is equallyd divide into 8 cavitys, and wherein 4 cavitys are resistance noise-abatement structure, and 4 cavitys are resistance noise-abatement structure in addition, constitute the compound noise-abatement structure of impedance jointly, have widened the noise elimination frequency band, and spheroid array or dysmorphism (dislocation) array, the expansion room that forms in the noise elimination passageway has additional resistance noise elimination, promotes noise elimination efficiency. The silencing passage formed by the spherical array or the irregular (staggered) array has gradually changed and alternatively changed through-flow sections, so that the high-frequency sound is prevented from penetrating the passage, and the high-frequency failure phenomenon is effectively inhibited.

Description

Spherical array impedance composite noise elimination structure

Technical Field

The utility model relates to a noise elimination structure specifically is a spherical array impedance composite noise elimination structure, is applicable to industrial and mining enterprises, central air conditioning system and has the ventilation noise elimination field that the noise elimination needs.

Background

The known industrial and mining enterprises, central air conditioning systems and the field of ventilation and noise elimination with noise elimination requirements often adopt single-channel, sheet type, honeycomb type, disc type and other noise elimination structures which are conventional noise elimination structures and have certain noise elimination effect, but have the defects of low noise elimination efficiency, high-frequency failure, narrow noise elimination frequency band, poor aerodynamic performance, high energy consumption and the like, and are contrary to the concepts of environmental protection, energy conservation and emission reduction.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned noise cancelling structure's technical defect, the utility model provides a compound noise cancelling structure of spherical array impedance effectively promotes noise elimination efficiency, suppresses the high frequency inefficacy, widens noise elimination frequency band, improves aerodynamic performance, reduces the power equipment energy consumption to have additional resistance noise elimination effect concurrently, satisfy the requirement of environmental protection, energy-conservation and emission reduction.

The utility model provides a spherical array impedance composite noise elimination structure, the diameter size of the spherical noise elimination body is confirmed according to the noise elimination channel flow area size, the spherical noise elimination body includes perforated plate, microperforated panel, baffle and pipe, the baffle is circular, circular baffle center trompil will the pipe penetrates in the hole of circular baffle center trompil and fixes, the pipe length of circular baffle both sides is the same, adopts eight little baffles equipartition in circular baffle both sides and arranges with the circular array, little baffle includes long edge and minor face and circular arc edge, the long edge of little baffle is fixed on the pipe, the minor face is fixed on circular baffle, spherical noise elimination body skeleton structure includes a pipe, a circle baffle and eight little baffles, fix perforated plate, microperforated panel respectively on the surface of spherical noise elimination body skeleton structure, and finally forming eight eighth spherical cavities with the same size and structure, wherein the shell plates of the first, third, sixth and eighth cavities in the eight spherical cavities are perforated plates, sound absorbing materials are filled in the eight spherical cavities, the eight spherical cavities are resistive noise elimination structures, the shell plates of the second, fourth, fifth and seventh cavities are micro-perforated plates, the eight spherical cavities are micro-perforated resonant cavity resistive noise elimination structures, the circular pipes protruding out of the spherical parts are buckled together by fasteners to form spherical noise elimination body strings, the number of the spherical noise elimination bodies is determined according to the size of noise elimination amount, the spherical noise elimination bodies can be connected in series in a compact mode or can be connected in series in a dispersed mode at intervals of 1-3 diameters of the spherical noise elimination bodies, and the spherical arrays or special-shaped (staggered) arrays in the spherical noise elimination strings are arranged in noise elimination channels through supporting members to form spherical array impedance composite noise elimination structures.

The utility model discloses a further improvement lies in: the diameter of the spherical silencing body is determined according to the flow area of the silencing channel, and the diameter of the spherical silencing body is within the range.

The utility model discloses a further improvement lies in: the outer diameter, the length and the diameter of the circular partition plate of the circular tube, and the short side of the small partition plate is one fourth of the circular partition plate, and one straight side of the short side is cut off.

The utility model discloses a further improvement lies in: the aperture of the central opening of the circular partition plate is as follows.

The utility model discloses a further improvement lies in: the partition plate, the round pipe, the perforated plate and the micro-perforated plate are all made of metal, glass fiber reinforced plastic, PVC and other materials with certain strength, the metal materials are welded or riveted, and the PVC materials are connected in a hot melting mode.

The utility model discloses a further improvement lies in: the diaphragm thickness is 1 ~ 3mm, the wall thickness of pipe is 3 ~ 5mm, perforated plate thickness is 1 ~ 3mm, the perforation rate of perforated plate is 20% ~ 30%, the thick of microperforated plate is less than or equal to, and the aperture is less than or equal to, and the perforation rate is less than or equal to.

The utility model discloses a further improvement lies in: the round pipe of the convex sphere part is 50mm of convex sphere, and the round pipes with 50mm of convex sphere are buckled together by a fastener.

The utility model discloses a further improvement lies in: the sound absorption material comprises homogeneous materials such as porous alumina, foamed aluminum, foamed ceramic, foamed glass, foamed melamine and the like, or sound absorption materials such as centrifugal superfine glass wool, slag wool, wood fiber, polystyrene, polyurethane foam plastic, urea-formaldehyde foam plastic, phenolic foam plastic and the like which are wrapped by sound-transmitting glass fiber cloth, sound absorption felt or other sound-transmitting fabrics are filled.

The utility model has the advantages that:

in the field of noise control, there are two main ways of silencing: the utility model discloses a spherical noise eliminator is divided equally into 8 cavitys, 4 of them are resistance noise elimination structures, another 4 cavitys are resistance noise elimination structures, these two major parts constitute impedance composite noise elimination structure jointly, the expansion chamber that sphere array or dysmorphism (dislocation) array formed in the noise elimination passageway is another kind of resistance noise elimination structure, special sphere structure and array mode can all-round absorption sound energy, the noise elimination efficiency has been promoted, the noise elimination frequency band has been widened, the rounding off surface of spherical noise eliminator structure, can effectively reduce ventilation resistance, improve aerodynamic performance, reduce power equipment energy consumption, reach energy-conserving purpose, sphere array or dysmorphism (dislocation) array, the noise elimination passageway that forms, through-flow cross section and alternate variation, the high-frequency sound is prevented from penetrating in the channel, and the high-frequency failure phenomenon is effectively inhibited.

In order to verify the utility model discloses this technical scheme's reliability, implemented in the actual noise control engineering, the result shows, compare with ordinary similar noise cancelling structure, the utility model discloses an average noise elimination volume of structure increases about 10%, and resistance loss reduces about 3%, and the energy consumption reduces about 3%, and 2 ~ 3 octaves are widened to the noise elimination frequency band, effectively restrain the high frequency inefficacy phenomenon.

Drawings

FIG. 1 is a schematic structural view of a spherical muffler body;

FIG. 2 is a schematic view of a circular partition plate;

FIG. 3 is a schematic structural view of the upper half of the spherical muffler body;

FIG. 4 is a schematic structural view of the lower half of the spherical muffler body;

FIG. 5 is a schematic view of the spherical muffling bodies being tightly connected in series;

FIG. 6 is a schematic view of discrete series connection of spherical muffling bodies;

FIG. 7 is a schematic view of a close-packed array of spheres in a muffling channel;

FIG. 8 is a schematic diagram of a dense arrangement of irregular arrays of spheres in a muffling channel;

FIG. 9 is a schematic view of a ball array in a muffling channel;

FIG. 10 is a schematic view of a spherical random array in a silencing channel.

Description of the drawings: 1-spherical muffler, 2-muffling channel, 3-perforated plate, 4-micro perforated plate, 5-clapboard, 6-round tube, 7-round clapboard, 8-center open pore structure, 9-small clapboard, 10-spherical cavity, 11-first cavity, 12-third cavity, 13-sixth cavity, 14-eighth cavity, 15-sound absorbing material, 16-second cavity, 17-fourth cavity, 18-fifth cavity, 19-seventh cavity, 20-micro perforated resonant cavity resistance muffling structure.

Detailed Description

In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention.

As shown in fig. 1-4, a spherical array impedance composite noise elimination structure, the diameter of the spherical noise elimination body 1 is determined according to the flow area of the noise elimination channel 2, the diameter of the spherical noise elimination body 1 is between the two, the spherical noise elimination body 1 comprises a perforated plate 3, a micro-perforated plate 4, a partition plate 5 and a round pipe 6, the partition plate 5 is circular, the center of the round partition plate 7 is provided with a central opening structure 8, the round pipe 6 penetrates into the hole of the central opening structure 8 of the round partition plate 7 and is fixed, the lengths of the round pipes 6 on the two sides of the round partition plate 7 are the same, the outer diameter of the round pipe 6 is equal to the length, the diameter of the round partition plate 7, the aperture of the central opening structure 8 on the round partition plate 7 is 1-3 mm, the wall thickness of the round pipe 6 is 3-5 mm, the thickness of the perforated plate 3 is 1-3 mm, the perforation rate of the perforated plate 3 is 20% -30%, the thickness of the micro-perforated plate 4 is less than or equal to that of the perforated plate, the hole diameter is less than or equal to that of the perforated plate, the perforation rate is less than or equal to that of the perforated plate, the partition plate 5, the round pipe 6, the perforated plate 3 and the micro-perforated plate 4 are made of metal, glass fiber reinforced plastic, PVC and other materials with certain strength, the metal materials are welded or riveted, and the PVC materials are connected in a hot.

Adopt eight little baffles 9 equipartitions to be in circular baffle 7 both sides and arrange with circumference type array, little baffle 9 the minor face is the fourth of circular baffle 7 to cut off one of them straight flange, little baffle 9 includes long limit and minor face and circular arc limit, the long limit of little baffle 9 is fixed on pipe 6, the minor face is fixed on circular baffle 7, the skeletal structure of spherical noise elimination body 1 includes one pipe 6, one circular baffle 7 and eight little baffle 9 will perforated plate 3, microperforated panel 4 are fixed respectively the surface of spherical noise elimination body 1 skeletal structure, finally form eight the same and the same eighth spherical cavity 10 of eighth of structure of size, eight the shell plates of first 11, third 12, sixth 13 and eighth cavity 14 in the spherical cavity 10 are the perforated plate, the sound absorption material 15 is filled inside to be a resistance noise elimination structure, the sound absorption material 15 comprises homogeneous materials such as porous alumina, foamed aluminum, foamed ceramic, foamed glass, foamed melamine and the like, or is filled with sound absorption materials such as centrifugal superfine glass wool, slag wool, wood fiber, polystyrene, polyurethane foamed plastic, urea-formaldehyde foamed plastic, phenolic foamed plastic and the like wrapped by sound-transmitting glass cloth, sound absorption felt or other sound-transmitting fabrics, the shell plates of the second 16, the fourth 17, the fifth 18 and the seventh cavity 19 are micro-perforated plates 4 which form a micro-perforated resonant cavity resistance noise elimination structure 20 with the internal structure, the circular pipes 6 protruding out of the sphere part are buckled together by fasteners to form a spherical noise elimination string, the number of the spherical noise elimination bodies 1 is determined according to the size of the noise elimination quantity, the spherical noise elimination bodies 1 can be compact, and can also be dispersed and connected in series at intervals of 1-3 diameters of the spherical noise elimination bodies 1, and a spherical array or a special-shaped (staggered) array in the spherical silencing string body is arranged in the silencing channel through a supporting member to form the spherical array impedance composite silencing structure.

As shown in fig. 5 and 6, the circular tubes 6 with 50mm of convex spheres are fastened together by fasteners to form a string of spherical muffling bodies, the number of the spherical muffling bodies 1 is determined according to the muffling amount, and the spherical muffling bodies 1 can be closely connected in series or dispersedly connected in series at intervals of 1-3 diameters of the spherical muffling bodies 1.

As shown in fig. 7, 8, 9 and 10, a ball array or a deformed (offset) array in the ball-shaped sound attenuation string is arranged in the sound attenuation passage 2 through the support member to form a ball array impedance composite sound attenuation structure.

The working principle is as follows: when noise is transmitted along the silencing channel, sound waves contact the spherical silencing body, sound energy is absorbed by the spherical silencing body, and then the aim of silencing is achieved.

The utility model has the advantages that:

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims

1. The utility model provides a compound noise-abatement structure of spherical array impedance which characterized in that: the diameter size of the spherical noise elimination body is determined according to the size of the through flow area of the noise elimination channel, the spherical noise elimination body comprises a perforated plate, a micro-perforated plate, a partition plate and a round pipe, the partition plate is circular, the center of the round partition plate is perforated, the round pipe penetrates into the hole of the center of the round partition plate and is fixed, the lengths of the round pipes on two sides of the round partition plate are the same, eight small partition plate equipartitions are adopted to be distributed on two sides of the round partition plate and in a circular array, the small partition plate comprises a long edge, a short edge and an arc edge, the long edge of the small partition plate is fixed on the round pipe, the short edge is fixed on the round partition plate, the spherical noise elimination body framework structure comprises one round pipe, one round partition plate and eight small partition plates, the perforated plate and the micro-perforated plate are respectively fixed on the surface of the spherical noise elimination body framework structure, the shell plates of the first, third, sixth and eighth cavities in the eight spherical cavities are perforated plates, sound absorbing materials are filled in the perforated plates to form a resistive noise elimination structure, the shell plates of the second, fourth, fifth and seventh cavities are micro perforated plates to form a resistive noise elimination structure of a micro perforated resonant cavity, circular pipes protruding out of a spherical part are buckled together by fasteners to form a spherical noise elimination body string, the number of the spherical noise elimination bodies is determined according to the size of noise elimination quantity, the spherical noise elimination bodies can be closely connected in series or dispersedly connected in series at intervals of 1-3 diameter distances of the spherical noise elimination bodies, and a spherical array or a special-shaped array in the spherical noise elimination string body is arranged in a noise elimination channel through a supporting member to form a spherical array impedance composite noise elimination structure.

2. The spherical array impedance composite damping structure of claim 1, wherein: the diameter of the spherical noise elimination body is determined according to the size of the through flow area of the noise elimination channel, and the diameter D =100 mm-500 mm of the spherical noise elimination body.

3. The spherical array impedance composite damping structure of claim 1, wherein: the diameter D =10mm ~50mm outside the circular tube, length L = D +100mm, circular baffle diameter H = D-2mm, the minor face of little baffle is the quarter of circular baffle to cut off (D/2) mm with one of them straight flange.

4. The spherical array impedance composite damping structure of claim 1, wherein: the aperture of the central opening of the circular partition plate is phi = d +2 mm.

5. The spherical array impedance composite damping structure of claim 1, wherein: the partition plate, the round pipe, the perforated plate and the micro-perforated plate are all made of metal, glass fiber reinforced plastic, PVC and other materials with certain strength, the metal materials are welded or riveted, and the PVC materials are connected in a hot melting mode.

6. The spherical array impedance composite damping structure of claim 1, wherein: the diaphragm is 1-3 mm in thickness, the circular tube is 3-5 mm in wall thickness, the perforated plate is 1-3 mm in thickness, the perforation rate of the perforated plate is 20-30%, the micro-perforated plate is not more than 1mm in plate thickness, not more than 1mm in hole diameter and not more than 5%.

7. The spherical array impedance composite damping structure of claim 1, wherein: the round pipe of the convex sphere part is 50mm of convex sphere, and the round pipes with 50mm of convex sphere are buckled together by a fastener.

8. The spherical array impedance composite damping structure of claim 1, wherein: the sound absorption material comprises homogeneous materials such as porous alumina, foamed aluminum, foamed ceramic, foamed glass, foamed melamine and the like, or sound absorption materials such as centrifugal superfine glass wool, slag wool, wood fiber, polystyrene, polyurethane foam plastic, urea-formaldehyde foam plastic, phenolic foam plastic and the like which are wrapped by sound-transmitting glass fiber cloth, sound absorption felt or other sound-transmitting fabrics are filled.