RU2532513C1 - Sound absorbing element (versions) - Google Patents

Sound absorbing element (versions) Download PDF

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Publication number
RU2532513C1
RU2532513C1 RU2013133939/03A RU2013133939A RU2532513C1 RU 2532513 C1 RU2532513 C1 RU 2532513C1 RU 2013133939/03 A RU2013133939/03 A RU 2013133939/03A RU 2013133939 A RU2013133939 A RU 2013133939A RU 2532513 C1 RU2532513 C1 RU 2532513C1
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Russia
Prior art keywords
sound
absorbing
layer
smooth
perforated
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RU2013133939/03A
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Russian (ru)
Inventor
Олег Савельевич Кочетов
Мария Олеговна Стареева
Мария Михайловна Стареева
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Олег Савельевич Кочетов
Мария Олеговна Стареева
Мария Михайловна Стареева
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Priority to RU2013133939/03A priority Critical patent/RU2532513C1/en
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Publication of RU2532513C1 publication Critical patent/RU2532513C1/en

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Abstract

FIELD: physics, acoustics.
SUBSTANCE: invention relates to industrial acoustics and can be used for minimizing of noise of machine drives, lining of industrial premises and in other sound-proof structures. Sound absorbing element comprises a smooth surface and a perforated surface between which a multilayer sound absorbing structure is placed which consists of three layers of sound-absorbing material. The first layer is more rigid, solid and profiled and is fixed on the smooth surface. The second layer is softer than the first one, is intermittent and placed in the focus of the sound reflecting surfaces of the first layer. The third layer is made from foamed sound absorbing material, for example, construction sealing foam insulation, and is placed between the first more rigid layer and the perforated surface of the sound absorbing element.
EFFECT: invention allows to improve efficiency of sound-proofing and reliability of the design in general.
8 cl, 3 dwg

Description

The invention relates to industrial acoustics and can be used to reduce the noise of the drive machines, facing industrial premises and other sound-absorbing structures.
The closest technical solution to the technical nature and the achieved result is a sound-absorbing element used as a facing of industrial premises, known from the RF patent No. 2463412 (prototype).
The disadvantage of the technical solution adopted as a prototype is the relatively low noise reduction due to the presence of voids between the layers, where there is no sound absorption between the layers of the sound absorber.
The technical result is an increase in the efficiency of sound attenuation and the reliability of the structure as a whole.
This is achieved by the fact that in a sound-absorbing element containing a smooth and perforated surface, between which a multilayer sound-absorbing structure is placed, the latter consists of three layers of sound-absorbing material, the first layer being more rigid, made solid and profiled and fixed on a smooth surface, and the second a layer softer than the first is intermittent and located in the focus of the sound-reflecting surfaces of the first layer, and the third layer of the sound-absorbing element is made of foamed sound absorbent material such as foam sealant construction and is disposed between the first, more rigid layer and the perforated surface of sound-absorbing element.
Figure 1 shows a diagram of a sound-absorbing element, figure 2 and 3 are variants of a sound-absorbing element.
The sound-absorbing element (figure 1) is made in the form of a smooth 1 and perforated 2 surfaces, between which is placed a sound-absorbing structure consisting of three layers of sound-absorbing material, the first layer 3 being more rigid, made solid and profiled and fixed on a smooth surface 1, the second layer 4, softer than the first, is intermittent and located in the focus of the sound-reflecting surfaces of the first layer 3.
The intermittent sound-absorbing layer 4, located in the focus of the continuous profiled layer 3, is made in the form of bodies of revolution, for example in the form of balls, ellipsoids of revolution, and is fastened with rods 6 (the cross-section with one rod 6 is shown in the drawing) parallel to smooth 1 and perforated 2 surfaces that are rigidly connected to a smooth surface 1 by means of vertical fastening elements perpendicular to them, for example in the form of plates 7, one end of which is rigidly fixed to a smooth surface 1, and the second is made in the form of a clamp Covering the rod 6 and tightening the screw (not shown).
The solid profiled layer 3 of the sound-absorbing element is made of a more rigid sound-absorbing material, in which the reflection coefficient of sound is greater than the sound-absorption coefficient, and the profiles 5 are formed by spherical surfaces interconnected in such a way that, in general, each of the profiles 5 forms an integral dome-shaped profile focusing reflected sound on the same soft intermittent sound-absorbing layer 4.
The third layer 8 of the sound-absorbing element is made of foamed sound-absorbing material, for example, construction sealing foam, which increases the sound-insulating properties of the structure as a whole by filling the voids formed by layers 1 and 2, and also increases the reliability of the structure as a whole when installed on equipment operating in conditions with increased shock and vibration loads. The third layer 8 is located between the first, more rigid, layer 3 and the perforated surface 2 of the sound-absorbing element.
As a sound-absorbing material of the first, more rigid layer 3, a material based on aluminum-containing alloys was used, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following strength properties: compressive strength within 5 ... 10 MPa, bending strength within 10 ... 20 MPa, for example foamed aluminum.
As sound-absorbing material of the second, softer layer 4, rockwool-type mineral wool or URSA-type mineral wool, or P-75 type cotton wool, or glass wool lined with glass wool, or foamed polymer can be used for example polyethylene or polypropylene.
The material of the perforated surface 2 can be made of solid decorative vibration-damping materials, for example, plastic compound such as Agate, Anti-Vibrate, Shvim, and the inner surface of the perforated surface 2 facing the sound-absorbing structure is lined with an acoustically transparent material, for example, fiberglass type EZ -100 or "Poviden" type polymer.
The sound-absorbing element as an option (Fig. 2) can be made in the form of smooth 1 and perforated 2 surfaces, between which a sound-absorbing structure of complex shape is placed, which is an alternation of solid sections 13 and hollow sections 12. Solid sections 13, in turn, are formed by smooth prismatic surfaces 10, fixed to a smooth surface 1, and two associated prismatic surfaces having on one side a smooth surface and on the other hand a gear surface 11, wherein ershiny teeth inward of these surfaces, and the surfaces themselves are secured on a perforated surface 2. Embossed sound-absorbing elements 9 are attached to the smooth 1 surface of the wall.
The sound-absorbing element as an option (Fig. 3) can be made in the form of smooth 1 and perforated 2 surfaces, between which there is a layer 14 of sound-absorbing material of complex shape, which is an alternation of solid sections 14 and hollow sections 18. Hollow sections 17 are formed by prismatic surfaces 15 and 16, having in cross section parallel to the plane of the drawing, the shape of a parallelogram, the inner surfaces of which have a toothed structure, with the tops of the teeth facing the inside of the prismatic surfaces 15 and 16, while the ribs of the prismatic surfaces are fixed respectively on a smooth 1 and perforated 2 walls.
Sound-absorbing element operates as follows.
Sound energy, passing through a layer of perforated surface 2 and a third layer 8 of a sound-absorbing element made of foamed sound-absorbing material, falls on an intermittent sound-absorbing layer 4 located at the focus of a continuous profiled layer 3, where the primary dissipation of sound energy occurs. Then, the sound energy enters the continuous profiled layer 3 of sound-absorbing material formed by spherical surfaces forming a solid dome-shaped profile, and focusing the reflected sound onto a soft sound absorber 4. Here, the sound energy is converted into heat (dissipation, energy dissipation), i.e. in the pores of the sound absorber, representing the Helmholtz resonator model, there are energy losses due to friction, which fluctuates with the excitation frequency of the mass of air in the mouth of the resonator, against the wall of the neck itself, which has the form of a branched network of micropores of the sound absorber. The perforation coefficient of the perforated surface 2 is taken to be equal to or more than 0.25.

Claims (8)

1. Sound-absorbing element containing a smooth and perforated surface, between which is placed a multilayer sound-absorbing structure, characterized in that the multilayer sound-absorbing structure consists of three layers of sound-absorbing material, while the first layer is more rigid, made solid and profiled and fixed on a smooth surface, and the second layer, softer than the first, is intermittent and located in the focus of the sound-reflecting surfaces of the first layer, and the third layer of the sound-absorbing element made of foamed sound-absorbing material, such as building sealing foam, and is located between the first, more rigid layer, and the perforated surface of the sound-absorbing element.
2. The sound-absorbing element according to claim 1, characterized in that the intermittent sound-absorbing layer located in the focus of a continuous profiled layer is made in the form of bodies of revolution, for example in the form of balls, ellipsoids of revolution, and is attached using rods parallel to smooth and perforated surfaces, which are rigidly connected to a smooth surface by means of vertical fastening elements perpendicular to them, for example in the form of plates, one end of which is rigidly fixed to a smooth surface, and the other is made in the form of a clamp, covering the rod and tightening it with a screw.
3. The sound-absorbing element according to claim 1, characterized in that the continuous profiled layer of the sound-absorbing element is made of a more rigid sound-absorbing material, in which the reflection coefficient of sound is greater than the sound absorption coefficient, and the profiles are formed by spherical surfaces interconnected in such a way that On the whole, each of the profiles forms an integral dome-shaped profile focusing the reflected sound onto the same soft intermittent sound-absorbing layer.
4. The sound-absorbing element according to claim 1, characterized in that the material based on aluminum-containing alloys is used as the sound-absorbing material of the first, more rigid layer, followed by filling them with titanium hydride or air with a density in the range of 0.5 ... 0.9 kg / m 3 with the following strength properties: compressive strength in the range of 5 ... 10 MPa, bending strength in the range of 10 ... 20 MPa, for example foam aluminum.
5. The sound-absorbing element according to claim 1, characterized in that as the sound-absorbing material of the second, softer layer, rockwool type mineral wool or URSA type mineral wool or P-75 type cotton wool is used, or glass wool lined with glass wool, or a foamed polymer, for example polyethylene or polypropylene.
6. The sound-absorbing element according to claim 1, characterized in that the material of the perforated surface is made of solid decorative vibration-damping materials, for example, plastic compound such as "Agate", "Anti-Vibrate", "Shvim", and the inner surface of the perforated surface facing the sound-absorbing structure, lined with an acoustically transparent material, such as fiberglass type E3-100 or polymer type "Poviden."
7. The sound-absorbing element according to claim 1, characterized in that the walls are lined with sound-absorbing structures containing smooth and perforated surfaces, between which there is a sound-absorbing structure of complex shape, which is an alternation of solid sections and hollow sections, and the solid sections, in turn, are formed by smooth prismatic surfaces fixed to the smooth surface of the wall, and two associated prismatic surfaces having on one side a smooth surface on the other hand, a serrated surface, with the tops of the teeth facing inside of these surfaces, and the surfaces themselves attached to the perforated surface of the sound-absorbing structure, and embossed sound-absorbing elements attached to the smooth surface of the wall.
8. The sound-absorbing element according to claim 1, characterized in that it contains a smooth 1 and perforated 2 walls, between which there is a layer of sound-absorbing material of complex shape, which is an alternation of solid sections and hollow sections, and the hollow sections are formed by prismatic surfaces having a section, parallel to the plane of the drawing, the shape of a parallelogram, the inner surfaces of which have a toothed structure, with the tops of the teeth facing the inside of the prismatic surfaces, while the ribs at The surfaces are mounted respectively on smooth and perforated walls.
RU2013133939/03A 2013-07-22 2013-07-22 Sound absorbing element (versions) RU2532513C1 (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2584902C1 (en) * 2015-01-20 2016-05-20 Олег Савельевич Кочетов Kochetov spherical acoustic absorber
RU2588006C1 (en) * 2015-09-08 2016-06-27 Мария Олеговна Стареева Sound-absorbing composite structure
RU2598252C1 (en) * 2015-09-08 2016-09-20 Олег Савельевич Кочетов Kochetov sound-absorbing structure
RU2598249C1 (en) * 2015-09-08 2016-09-20 Мария Олеговна Стареева Sound absorbing structure
RU2598253C1 (en) * 2015-09-08 2016-09-20 Олег Савельевич Кочетов Combined kochetov sound-absorbing structure
RU2607484C1 (en) * 2016-01-18 2017-01-10 Мария Олеговна Стареева Noise absorbing wall panel
RU2613061C1 (en) * 2016-01-18 2017-03-15 Олег Савельевич Кочетов Sound-absorbing element of kochetov with resonant inserts
RU2613992C1 (en) * 2016-01-18 2017-03-22 Олег Савельевич Кочетов Kochetov wall resonant panel
RU2623741C1 (en) * 2016-04-21 2017-06-29 Олег Савельевич Кочетов Acoustically comfortable room with noise protective equipment
RU2630048C1 (en) * 2016-04-11 2017-09-05 Олег Савельевич Кочетов Low-noise fan by kochetov
RU2642594C1 (en) * 2017-03-07 2018-01-25 Олег Савельевич Кочетов Helical-type sound absorbing element
RU2645381C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Sound absorption element with resonant inserts
RU2645365C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Wall resonance panel
RU2646251C1 (en) * 2017-03-14 2018-03-02 Олег Савельевич Кочетов Acoustic screen
RU2646879C1 (en) * 2017-04-07 2018-03-12 Олег Савельевич Кочетов Soundproofing casing
RU2648127C1 (en) * 2017-03-07 2018-03-22 Олег Савельевич Кочетов Sound-absorbing structure with resonant inserts
RU2648125C1 (en) * 2017-04-10 2018-03-22 Олег Савельевич Кочетов Soundproofing enclosure
RU2651569C2 (en) * 2015-05-20 2018-04-20 Мария Михайловна Стареева Acoustic cabin
RU2651987C1 (en) * 2017-03-24 2018-04-24 Олег Савельевич Кочетов Casing for tape machine
RU2651995C1 (en) * 2017-03-13 2018-04-24 Олег Савельевич Кочетов Acoustic screen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
DE102004037260A1 (en) * 2004-07-31 2006-03-23 Südluft Systemtechnik GmbH & Co. KG Sound-absorbing or sound-damping cassette structure and a method for cleaning such
RU2455433C1 (en) * 2011-03-18 2012-07-10 Олег Савельевич Кочетов Acoustically comfortable room
RU2471935C1 (en) * 2011-09-20 2013-01-10 Олег Савельевич Кочетов Comfort structure of room

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
DE102004037260A1 (en) * 2004-07-31 2006-03-23 Südluft Systemtechnik GmbH & Co. KG Sound-absorbing or sound-damping cassette structure and a method for cleaning such
RU2455433C1 (en) * 2011-03-18 2012-07-10 Олег Савельевич Кочетов Acoustically comfortable room
RU2471935C1 (en) * 2011-09-20 2013-01-10 Олег Савельевич Кочетов Comfort structure of room

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2584902C1 (en) * 2015-01-20 2016-05-20 Олег Савельевич Кочетов Kochetov spherical acoustic absorber
RU2651569C2 (en) * 2015-05-20 2018-04-20 Мария Михайловна Стареева Acoustic cabin
RU2588006C1 (en) * 2015-09-08 2016-06-27 Мария Олеговна Стареева Sound-absorbing composite structure
RU2598252C1 (en) * 2015-09-08 2016-09-20 Олег Савельевич Кочетов Kochetov sound-absorbing structure
RU2598249C1 (en) * 2015-09-08 2016-09-20 Мария Олеговна Стареева Sound absorbing structure
RU2598253C1 (en) * 2015-09-08 2016-09-20 Олег Савельевич Кочетов Combined kochetov sound-absorbing structure
RU2613061C1 (en) * 2016-01-18 2017-03-15 Олег Савельевич Кочетов Sound-absorbing element of kochetov with resonant inserts
RU2613992C1 (en) * 2016-01-18 2017-03-22 Олег Савельевич Кочетов Kochetov wall resonant panel
RU2607484C1 (en) * 2016-01-18 2017-01-10 Мария Олеговна Стареева Noise absorbing wall panel
RU2630048C1 (en) * 2016-04-11 2017-09-05 Олег Савельевич Кочетов Low-noise fan by kochetov
RU2623741C1 (en) * 2016-04-21 2017-06-29 Олег Савельевич Кочетов Acoustically comfortable room with noise protective equipment
RU2648127C1 (en) * 2017-03-07 2018-03-22 Олег Савельевич Кочетов Sound-absorbing structure with resonant inserts
RU2642594C1 (en) * 2017-03-07 2018-01-25 Олег Савельевич Кочетов Helical-type sound absorbing element
RU2651995C1 (en) * 2017-03-13 2018-04-24 Олег Савельевич Кочетов Acoustic screen
RU2645365C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Wall resonance panel
RU2645381C1 (en) * 2017-03-14 2018-02-21 Олег Савельевич Кочетов Sound absorption element with resonant inserts
RU2646251C1 (en) * 2017-03-14 2018-03-02 Олег Савельевич Кочетов Acoustic screen
RU2651987C1 (en) * 2017-03-24 2018-04-24 Олег Савельевич Кочетов Casing for tape machine
RU2646879C1 (en) * 2017-04-07 2018-03-12 Олег Савельевич Кочетов Soundproofing casing
RU2648125C1 (en) * 2017-04-10 2018-03-22 Олег Савельевич Кочетов Soundproofing enclosure

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