RU2655109C1 - Sound absorbing element - Google Patents

Sound absorbing element Download PDF

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Publication number
RU2655109C1
RU2655109C1 RU2017107045A RU2017107045A RU2655109C1 RU 2655109 C1 RU2655109 C1 RU 2655109C1 RU 2017107045 A RU2017107045 A RU 2017107045A RU 2017107045 A RU2017107045 A RU 2017107045A RU 2655109 C1 RU2655109 C1 RU 2655109C1
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RU
Russia
Prior art keywords
sound
absorbing
prismatic
perforated
sections
Prior art date
Application number
RU2017107045A
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Russian (ru)
Inventor
Олег Савельевич Кочетов
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Олег Савельевич Кочетов
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Priority to RU2017107045A priority Critical patent/RU2655109C1/en
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Publication of RU2655109C1 publication Critical patent/RU2655109C1/en

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Abstract

FIELD: construction.
SUBSTANCE: invention relates to the sound-absorbing elements. Sound-absorbing element with resonant inserts, containing smooth and perforated surfaces, between which the complex shaped sound-absorbing material layer is arranged. Layer of complex shape is an alternation of solid sections and hollow sections. Hollow sections are formed by prismatic surfaces that are in their cross-section parallel to the plane of the drawing, have the shape of a parallelogram, whose inner surface has a toothed or wavy structure. Teeth tops face inside the prismatic surfaces. Ribs of the prismatic surfaces are secured on the smooth and perforated walls respectfully. Cavities of hollow sections, formed by prismatic surfaces, are filled with a sound absorber. Between the complex shaped sound-absorbing material layer smooth surface and solid sections, as well as between the perforated surface and solid sections, resonance plates with resonant inserts are located, performing the “Helmholtz” resonators necks functions. As a sound-absorbing material, the aluminum-containing alloys based material is used, with their subsequent filling with titanium hydride or air with density within 0.5…0.9 kg/m3 with the following strength properties: compression strength within 5…10 MPa, bending strength within 10…20 MPa. Material of perforated surface is made of hard decorative vibration damping materials. Facing the sound-absorbing structure perforated surface inner surface is lined with acoustically transparent material. As the formed by the prismatic surfaces hollow sections cavities filling sound-absorbing material, the basalt based mineral wool of “Rockwool” type is used, or "URSA" type mineral wool, or basalt wool of P-75 type, or glass wool lined with glass felt or foamed polymer.
EFFECT: technical result is increase in the sound attenuation efficiency and the structure reliability.
1 cl, 1 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 reliability of the structure as a whole.
This is achieved by the fact that in a sound-absorbing element with resonant inserts containing a smooth and perforated surface, between which there is a layer of sound-absorbing material of complex shape, the layer of complex shape 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 inward prismatic surfaces, and the edges of the prismatic surfaces are mounted respectively on the smooth and perforated walls, and the cavities of the hollow sections formed by the prismatic surfaces are filled with a sound absorber, and resonant plates with resonant inserts that serve as the necks of Helmholtz resonators.
The drawing shows a diagram of a sound-absorbing element with resonant inserts.
The sound-absorbing element with resonant inserts contains a smooth 1 and perforated 2 surfaces, between which there is a layer of sound-absorbing material of complex shape, which is an alternation of solid sections 3 and hollow sections 5, and the hollow sections 5 are formed by prismatic surfaces having a section parallel to the plane of the drawing in shape parallelogram, the inner surfaces of which have a gear structure 6, or wavy, or a surface with spherical surfaces (in the drawing not yet Done). The cavities 4 formed by the smooth 1 and perforated 2 surfaces, between which a layer of sound-absorbing material of complex shape is located, are filled with a sound absorber. In this case, the tops of the teeth face the inside of the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on a smooth 1 and perforated 2 walls. The cavities 7 of the hollow sections 5 formed by prismatic surfaces are filled with construction foam. Between a smooth 1 surface and solid sections 3 of a layer of sound-absorbing material of complex shape, as well as between a perforated 2 surface and solid sections 3 there are resonant plates 8 and 9 with resonant inserts 10, which serve as the neck of Helmholtz resonators.
As a sound-absorbing material, 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 in the range of 5 ... 10 MPa, tensile strength bending within 10 ... 20 MPa, for example foam aluminum.
Rockwool type mineral wool or URSA type mineral wool, or P-75 type basalt wool, or glass wool lined with glass wool, or foamed polymer, such as polyethylene or polypropylene, are used as sound-absorbing material.
The material of the perforated surface is made of solid, decorative vibration-damping materials, for example, agate, antivibrate, and shvim plastic compounds, and the inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, such as fiberglass type EZ-100 or "Poviden" type polymer.
Sound-absorbing element with resonant inserts works as follows. Sound energy, passing through a layer of perforated surface 2 and a combined sound-absorbing layer of complex shape, decreases, since the transition of sound energy into thermal energy (dissipation, energy dissipation) occurs, i.e. in the pores of the sound absorber, which are the Helmholtz resonator model, there are energy losses due to friction, which fluctuates with the excitation frequency of the mass of air in the resonator neck against the walls of the neck itself, which has the form of an extensive network of micropores of the sound absorber. Between a smooth 1 surface and solid sections 3 of a layer of sound-absorbing material of complex shape, as well as between a perforated 2 surface and solid sections 3 there are resonant plates 8 and 9 with resonant inserts 10, which serve as the neck of Helmholtz resonators.
Resonance holes 10 (inserts) located in the resonant plates 8 and 9, serve as the neck of the Helmholtz resonators, the frequency band of the damping of sound energy of which is determined by the diameter and number of resonant holes 10.

Claims (1)

  1. A sound-absorbing element with resonant inserts containing smooth and perforated surfaces, between which is a layer of sound-absorbing material of complex shape, characterized in that the layer of complex shape 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 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 prisms of the surface, and the ribs of the prismatic surfaces are mounted respectively on the smooth and perforated walls, the cavities of the hollow sections formed by the prismatic surfaces are filled with sound absorbers, and resonant plates with resonant inserts that serve as the necks of Helmholtz resonators, while as sound-absorbing material applied material based on aluminum-containing alloys, 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 within 10 ... 20 MPa, for example, foam aluminum, and the material of the perforated surface is made of solid decorative vibration damping materials, such as plastic compounds such as "Agate", "Anti-Vibrate", "Shvim", and the inner surface of the perforated surface, about turned towards the sound-absorbing structure, lined with an acoustically transparent material, such as fiberglass type EZ-100 or polymer like Poviden, and as sound-absorbing material filling the cavities of hollow areas formed by prismatic surfaces, rockwool-based mineral wool was used, or mineral wool of the URSA type, or basalt wool of the P-75 type, or glass wool lined with glass wool, or foamed polymer, for example polyethylene or polypropylene.
RU2017107045A 2017-03-03 2017-03-03 Sound absorbing element RU2655109C1 (en)

Priority Applications (1)

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RU2017107045A RU2655109C1 (en) 2017-03-03 2017-03-03 Sound absorbing element

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RU2017107045A RU2655109C1 (en) 2017-03-03 2017-03-03 Sound absorbing element

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RU2655109C1 true RU2655109C1 (en) 2018-05-23

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU348755A1 (en) * Научно исследовательский автомобильный , автомоторный институт
US1554179A (en) * 1922-09-05 1925-09-15 Dahlberg & Company Sound-absorbing material for walls and ceilings
RU2463412C2 (en) * 2010-08-20 2012-10-10 Олег Савельевич Кочетов Sound-absorbing structure of production room
RU2523327C1 (en) * 2013-04-10 2014-07-20 Олег Савельевич Кочетов Sound absorbing element
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU348755A1 (en) * Научно исследовательский автомобильный , автомоторный институт
US1554179A (en) * 1922-09-05 1925-09-15 Dahlberg & Company Sound-absorbing material for walls and ceilings
RU2463412C2 (en) * 2010-08-20 2012-10-10 Олег Савельевич Кочетов Sound-absorbing structure of production room
RU2523327C1 (en) * 2013-04-10 2014-07-20 Олег Савельевич Кочетов Sound absorbing element
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

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