CN209962693U - Silencing unit and silencing device - Google Patents

Abstract

The utility model provides a amortization unit and silencing device relates to muffler technical field. Although the invention of acoustic metamaterial such as US8579073B2 in recent years provides better improvement for low frequency noise reduction, the structures are expensive to manufacture, fragile, narrow in frequency range, limited to specific materials, and still do not have ventilation and heat dissipation functions, and are not suitable for outdoor environment or severe exhaust emission environment. Under the thickness far below the acoustic wave wavelength, the utility model discloses can regard as the sound device of inhaling that reduces ultralow frequency and low frequency reverberation time, its dissipation coefficient exceeds 0.45 and its bandwidth surpasses more than 10 times, even under the through-hole rate is 20%, also can be in ultralow frequency and low frequency range, has the volume of eliminating more than 7.5dB, and the muffler and its bandwidth that are the ventilation cooling surpass more than 25 times. The utility model discloses simple structure makes easily, and it is few to the material use restriction, can use in the adverse circumstances of humid tropical.

Description

Silencing unit and silencing device

Technical Field

A silencing unit and a silencing device relate to the technical field of silencers.

Background

Traditionally, fibrous sound absorbing materials have a better sound absorbing effect in the medium and high frequency range to reduce the reverberation time of the medium and high frequency, but have a poor sound absorbing effect in the low frequency range. The voice playback device has the advantages that the playback time of low-frequency sound is long for exhibition venues, indoor stadiums, administrative halls and the like, the speech definition is reduced due to the long playback time, and the speech communication quality and the public fire-fighting broadcast safety are seriously affected.

For low frequency noise, for example, 50Hz sound having a wavelength of 6.8m, below which 50Hz, the acoustic material generally has a low sound absorption coefficient and a low sound insulation amount. In a fibrous acoustic material with a normal thickness of, for example, 100mm, not only is the sound absorption coefficient low, but if a high low-frequency sound-deadening volume is required, if a material thickness of 1.7m is required as calculated from the 1/4 wavelength theory, the acoustic structure is often relatively bulky and difficult to embody, and the sound-deadening volume is greatly reduced at low frequencies. Although the invention of acoustic metamaterial such as US8579073B2 in recent years provides better improvement for low frequency noise reduction, the structures are expensive to manufacture, fragile, narrow in frequency range, limited to specific materials, and still do not have ventilation and heat dissipation functions, and are not suitable for outdoor environment or severe exhaust emission environment.

Disclosure of Invention

The utility model aims at developing a amortization unit and silencing device to solve the problem of mentioning in the above-mentioned background art.

The utility model discloses a following technical scheme realizes:

a silencing unit is a micro-through hole pipe with two through ends, the diameter of a hole of the micro-through hole pipe is 0.25 mm-2 mm, the wall thickness of the micro-through hole pipe is 0.25 mm-2 mm, and the length of the micro-through hole pipe is 10 mm-700 mm.

Furthermore, the micro through hole pipe is made of soft materials or hard materials.

Furthermore, both ends of the micro through hole pipe are communicated with the outside atmosphere.

A silencing device comprises a plurality of silencing units, wherein the silencing units are closely arranged in parallel and are bundled by clamps, silk threads, and are wrapped by mesh belts, glued or woven to form the whole silencing device.

Further, the diameters of the micro-through-hole tubes are the same, completely different or mixed.

Further, the micro-via tubes are the same length, completely different or mixed for use.

Furthermore, the micro through hole tubes are arranged in an array, staggered joint or random arrangement mode.

Further, the micro-through hole pipe can be arranged on a plurality of structural plates provided with holes, the micro-through hole pipe penetrates through the holes in the structural plates, the structural plates bear the weight of the micro-through hole pipe, and the micro-through hole pipe is prevented from deforming.

Further, the holes are arranged on the structural plate in a staggered mode.

Further, the matrix of holes is arranged on the structural panel.

The utility model has the advantages that:

under the thickness far away to be less than the sound wave length, the utility model discloses can be as reducing the sound absorbing device of ultralow frequency and low frequency reverberation time, its dissipation coefficient surpasses 0.45 and its bandwidth surpasses more than 10 times, even under the through-hole rate is 20%, also can be in ultralow frequency and low frequency range, has the volume of eliminating more than 7.5dB, and the muffler and its bandwidth surpass more than 25 times as ventilation cooling. The invention has simple structure, easy manufacture, and the appearance can be designed and integrated into an artwork with artistic value and can be manufactured in a weaving way. The invention has little restriction on the use of materials, can be used in environments such as indoor exhibition halls and the like, and can also be used in severe environments with high temperature and high humidity under the condition of replacing weather-resistant materials.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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

FIG. 2 is a structural panel with a matrix arrangement of holes;

FIG. 3 is a structural panel with staggered arrangement of holes;

FIG. 4 is a graph of experimental data;

FIG. 5 is a graph of data from experiment two;

reference numerals: 1. a micro-via tube; 2. a structural panel; 3. and (4) holes.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the present embodiment discloses a silencing unit and a silencing device, the silencing unit is a micro-through hole tube 1 with two through ends, two ends of the micro-through hole tube 1 are communicated with the atmosphere, the micro-through hole tube 1 can be made of a soft material or a hard material, the silencing device is composed of a plurality of silencing units, namely the micro-through hole tubes 1, and the plurality of micro-through hole tubes 1 are bound by a hoop, a silk thread, and are wrapped, glued or woven to form a whole silencing device; silencing device also can adopt structural slab 2 as the basis piece, be equipped with a plurality of holes 3 on structural slab 2, a plurality of little through-hole pipes 1 insert and pass a plurality of in the hole 3, a plurality of little through-hole pipes 1 are parallel to each other and arrange closely on structural slab 2, and structural slab 2 makes a plurality of little through-hole pipes 1 keep corresponding positional relationship, and the weight of a plurality of little through-hole pipes 1 is born by structural slab 2, prevents that little through-hole pipes 1 too much from causing mutual extrusion deformation to accessible structural slab 2 installs silencing device in the environment, and structural slab 2 is the atress piece.

Specifically, the structural plate 2 is made of hard materials, the micro through hole pipes 1 are made of hard materials or soft materials, and particularly when the micro through hole pipes 1 are made of soft materials and have flexibility, a plurality of micro through hole pipes 1 can be woven to have artistic effects, so that the micro through hole pipes not only have noise reduction performance, but also can bring artistic value. Both ends of the micro-through hole tube 1 are communicated with the outside atmosphere.

The aperture of the micro through hole pipe 1 is 0.25 mm-2 mm, the pipe wall thickness of the micro through hole pipe 1 is 0.25 mm-2 mm, and the length of the micro through hole pipe 1 is 10 mm-700 mm.

This embodiment is equipped with two structural slab 2, two the same position correspondence is equipped with a plurality of holes 3 on the structural slab 2, the diameter of hole 3 is the same with the external diameter of little through-hole pipe 1, and is a plurality of hole 3 is the rectangle array and sets up on structural slab 2, and a plurality of little through-hole pipe 1 passes hole 3 on two structural slab 2, and arbitrary little through-hole pipe 1 passes the hole 3 of the same position on two structural slab 2 respectively, because hole 3 on the structural slab 2 is the rectangle array and arranges, consequently a plurality of little through-hole pipe 1 also are the rectangle array and arranges on two structural slab 2.

In order to increase the through hole rate, the holes 3 on the structural plate 2 can also be arranged in a staggered manner, except for the holes 3 at the edges, six holes 3 are circumferentially arranged at equal intervals in any hole 3 inside, and under the condition that the structural plates 2 are the same, more holes 3 can be arranged in the arrangement mode than in a matrix arrangement mode, so that the through hole rate of the silencer is increased, and the utilization rate of the structural plate 2 is increased.

According to the utility model discloses a series of acoustics emulation has been carried out.

Experiment one: as shown in fig. 4, the diameter of the micro-via tube is 0.5mm, the wall thickness of the micro-via tube is 0.25, the arrangement of the micro-via tubes is square, the arrangement distance of the micro-via tubes is 1mm, the via rate is 20%, and the lengths of the micro-via tubes are respectively 10mm,20mm,50mm,100mm,200mm and 500 mm. The larger the value, the better the sound absorption effect, the greater the dispersion coefficient, i.e., the sound absorption effect, is on the horizontal axis of frequency Hz and on the vertical axis of frequency Hz.

The acoustic simulation results according to fig. 4 show that at a tube length of 50mm, which is much lower than the wavelength of 13.6m, and at frequencies ranging from ultra low frequencies to low frequencies of 20Hz to 200Hz, a more optimal sound dissipation factor (dissipated sound energy/incident sound energy) is greater than 0.45, and the bandwidth ranges from about 10 times or more, and a higher dissipation factor indicates a higher sound absorption capacity.

Experiment two: as shown in fig. 5, the diameter of the micro via tube is 0.5mm, the wall thickness of the micro via tube is 0.25, the arrangement of the micro via tubes is square, the arrangement distance of the micro via tubes is 1mm, the via rate is 20%, and the lengths of the micro via tubes are 50mm and 100mm, respectively. The horizontal axis represents frequency Hz, and the vertical axis represents canceling volume (transmission loss) dB.

Even if the through hole rate is below 20%, when the length of the micro through hole pipe is 100mm, namely the pipe length is far below the wave length of a sound wave of 13.6m, the noise elimination volume of the micro through hole pipe is above 7.5dB in the ultra-low frequency and low frequency range, namely the frequency is between 20Hz and 600Hz, the bandwidth range is more than 25 times, and the noise elimination volume is far superior to that of the traditional acoustic material or structure.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (10)

1. A sound attenuating unit, characterized by: the micro-through hole pipe is a micro-through hole pipe (1) with two through ends, the diameter of the micro-through hole pipe (1) is 0.25 mm-2 mm, the wall thickness of the micro-through hole pipe (1) is 0.25 mm-2 mm, and the length of the micro-through hole pipe (1) is 10 mm-700 mm.

2. A sound-deadening unit according to claim 1, wherein: the micro through hole pipe (1) is made of soft materials or hard materials.

3. A sound-deadening unit according to claim 1, wherein: and two ends of the micro through hole pipe (1) are communicated with the outside atmosphere.

4. A silencing apparatus, characterized in that: the silencer unit of any one of claims 1 to 3, wherein the silencer units are closely arranged in parallel and are bundled by a hoop, a silk thread, a mesh belt wrapping, gluing or weaving to form the whole silencer.

5. The acoustic abatement apparatus of claim 4, wherein: the diameters of the micro through hole pipes (1) are the same, completely different or mixed for use.

6. The acoustic abatement apparatus of claim 4, wherein: the micro through hole tubes (1) are identical in length, completely different or mixed for use.

7. The acoustic abatement apparatus of claim 4, wherein: the micro through hole tubes (1) are arranged in an array, staggered joint or random arrangement mode.

8. The acoustic abatement apparatus of claim 4, wherein: the micro-through hole pipe (1) can be arranged on a plurality of structural plates (2) provided with holes (3), and the micro-through hole pipe (1) penetrates through the holes (3) in the structural plates (2).

9. The acoustic abatement apparatus of claim 8, wherein: the holes (3) are arranged on the structural plate (2) in a staggered manner.

10. The acoustic abatement apparatus of claim 8, wherein: the holes (3) are arranged on the structural plate (2) in a matrix.

Images