RU2645365C1 - Wall resonance panel - Google Patents

Wall resonance panel Download PDF

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Publication number
RU2645365C1
RU2645365C1 RU2017108332A RU2017108332A RU2645365C1 RU 2645365 C1 RU2645365 C1 RU 2645365C1 RU 2017108332 A RU2017108332 A RU 2017108332A RU 2017108332 A RU2017108332 A RU 2017108332A RU 2645365 C1 RU2645365 C1 RU 2645365C1
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RU
Russia
Prior art keywords
sound
perforated
absorbing
prismatic
smooth
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RU2017108332A
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Russian (ru)
Inventor
Олег Савельевич Кочетов
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Олег Савельевич Кочетов
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Priority to RU2017108332A priority Critical patent/RU2645365C1/en
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Publication of RU2645365C1 publication Critical patent/RU2645365C1/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: acoustics.
SUBSTANCE: invention relates to industrial acoustics and can be used for machine drive noise reduction, for lining of manufacturing facilities and for other sound-absorbing structures. Wall resonance panel contains a smooth and perforated surface between which is placed a composite sound-absorbing layer of complex shape, which is an alternation of solid areas and hollow sections, frame of which is made of a rigid sound-absorbing material based on aluminum-containing alloys, followed by their filling with titanium hydride or air with a density within 0.5…0.9 kg/m3 with the following strength properties: compressive strength within 5…10 MPa, bending strength within 10…20 MPa, for example foam aluminum. In this case, the hollow sections are formed by prismatic surfaces that have a parallelogram shape in the cross section parallel to the plane of the drawing, the internal surfaces of which have a toothed structure. Tops of the teeth face the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on the smooth and perforated surfaces. Cavities formed by a smooth and perforated surfaces, between which a composite sound-absorbing layer of complex shape is located, are filled with a soft sound absorbing material of mineral wool on a basalt basis type "Rockwool", or "URSA", or basalt wool of type P-75, or glass wool with glass wool lining. Inner surface of the perforated surface facing the sound-absorbing material is lined with an acoustically transparent material, for example, glass fiber of type E3-100 or a polymer of the "Poviden" type, and cavities of hollow sections formed by prismatic surfaces are filled with a foamed polymer, for example polyethylene or polypropylene. Hollow cavity cavities formed by prismatic surfaces are connected by resonant holes and with cavities formed by smooth and perforated surfaces, between which is a composite sound-absorbing layer of complex shape. Inside the hollow sections, the internal surfaces of which have a dentate structure, there are additional resonance elements made in the form of spherical shells, inner surface of which is connected by resonant inserts with cavities located between the perforated surface and the solid sections of the sound-absorbing element.
EFFECT: technical result consists in improvement of efficiency and 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 patent of the Russian Federation No. 2532513 (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 the wall resonance panel containing smooth and perforated surfaces, between which a combined sound-absorbing layer of complex shape is placed, which is an alternation of solid sections and hollow sections, the frame of which is made of hard sound-absorbing material based on aluminum-containing alloys, followed by filling them with hydride titanium 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, firmly bending within 10 ... 20 MPa, for example, foam aluminum, hollow sections are formed by prismatic surfaces having a section parallel to the plane of the drawing, a parallelogram shape, the inner surfaces of which have a toothed structure, with the tops of the teeth facing the inside of the prismatic surfaces and the edges of the prismatic surfaces fixed respectively on smooth and perforated surfaces, and the cavity formed by smooth and perforated surfaces, between which is combined the sound-absorbing layer of complex shape, filled with soft sound-absorbing material from rockwool basalt-based mineral wool, or URSA, or P-75 basalt wool, or glass wool lined with glass wool, with the inner surface of the perforated surface facing to the side sound-absorbing material, lined with an acoustically transparent material, such as fiberglass type E3-100 or polymer type "Poviden", and the cavity of the hollow sections formed by prismatic surfaces are filled with foam polymer, for example polyethylene or polypropylene.
The drawing shows a wall resonance panel.
The wall resonance panel contains a smooth 1 and perforated 2 surfaces, between which there is a combined sound-absorbing layer of complex shape, which is an alternation of solid sections 3 and hollow sections 5, the frame of which is made of hard sound-absorbing material based on aluminum-containing alloys, followed by filling them with titanium hydride or air 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, a flexural strength within 10 ... 20 MPa, for example aluminum foam. Moreover, the hollow sections 5 are formed by prismatic surfaces having a parallelogram in cross section parallel to the drawing plane, the inner surfaces of which have a toothed structure 6, or wavy, or a surface with spherical surfaces (not shown). In this case, the tops of the teeth are turned inside the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on a smooth 1 and perforated 2 surfaces. Cavities 4, formed by smooth 1 and perforated 2 surfaces, between which a combined sound-absorbing layer of complex shape is located, are filled with soft sound-absorbing material from mineral wool based on Rockwool, or URSA, or P-75 basalt wool, or glass wool with fiberglass lining, while the inner surface of the perforated surface 2, facing the sound-absorbing material, is lined with an acoustically transparent material, for example fiberglass type EZ-100 or polymer t IPA "Seen".
The cavities 7 of the hollow sections 5 formed by the prismatic surfaces are filled with foamed polymer, for example polyethylene or polypropylene.
The cavities 7 of the hollow sections 5 formed by the prismatic surfaces are connected by resonant holes 8 and 9 with the cavities 4 formed by a smooth 1 and perforated 2 surfaces, between which a combined sound-absorbing layer of complex shape is located.
Wall resonance panel operates 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. The resonance holes 8 and 9 in the cavities 7 of the hollow sections 5 serve as the necks 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 8 and 9.
It is possible that inside the hollow sections 5, the inner surfaces of which have a toothed structure 6, there are additional resonant elements 10 made in the form of spherical shells, the inner surface of which is connected by resonant inserts with cavities located between the perforated 2 surface and the solid sections 3 of sound-absorbing item.

Claims (1)

  1. A wall resonance panel containing smooth and perforated surfaces, between which a combined sound-absorbing layer of complex shape is placed, which is an alternation of solid sections and hollow sections, the frame of which is made of hard sound-absorbing material based on aluminum-containing alloys, followed by filling them with titanium hydride or air with a density of within 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, foam aluminum, characterized in that 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, and the edges of the prismatic surfaces are fixed respectively on smooth and perforated surfaces, and the cavity formed by smooth and perforated surfaces between which there is a combined sound an absorbing layer of complex shape, filled with soft sound-absorbing material from rockwool basalt-based mineral wool, or URSA, or P-75 basalt wool, or glass wool lined with glass wool, while the inner surface of the perforated surface facing the sound-absorbing side the material is lined with an acoustically transparent material, such as fiberglass type E3-100 or a polymer of the type "Poviden", and the cavity of the hollow sections formed by prismatic surfaces are filled with foam by example, for example, polyethylene or polypropylene, while the cavities of the hollow sections formed by prismatic surfaces are connected by resonant holes and to the cavities formed by smooth and perforated surfaces, between which there is a combined sound-absorbing layer of complex shape, and inside the hollow sections, the inner surfaces of which have a toothed structure , there are additional resonant elements made in the form of spherical shells, the inner surface of which inserts coupled resonant cavities, arranged between the perforated and solid portions of the surface of sound-absorbing element.
RU2017108332A 2017-03-14 2017-03-14 Wall resonance panel RU2645365C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2017108332A RU2645365C1 (en) 2017-03-14 2017-03-14 Wall resonance panel

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RU2017108332A RU2645365C1 (en) 2017-03-14 2017-03-14 Wall resonance panel

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RU2645365C1 true RU2645365C1 (en) 2018-02-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507355A (en) * 1969-05-22 1970-04-21 Rohr Corp Multi-layer face material for sound absorptive duct lining material
RU2059772C1 (en) * 1994-07-07 1996-05-10 Московская государственная текстильная академия им.А.Н.Косыгина Acoustic panel
US5681408A (en) * 1993-02-05 1997-10-28 Gencorp Inc. Acoustic lamina wall covering
US8074766B1 (en) * 2009-09-08 2011-12-13 Creative Composites, Ltd Multi-layer sound attenuating acoustic panel
RU2532513C1 (en) * 2013-07-22 2014-11-10 Олег Савельевич Кочетов Sound absorbing element (versions)

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507355A (en) * 1969-05-22 1970-04-21 Rohr Corp Multi-layer face material for sound absorptive duct lining material
US5681408A (en) * 1993-02-05 1997-10-28 Gencorp Inc. Acoustic lamina wall covering
RU2059772C1 (en) * 1994-07-07 1996-05-10 Московская государственная текстильная академия им.А.Н.Косыгина Acoustic panel
US8074766B1 (en) * 2009-09-08 2011-12-13 Creative Composites, Ltd Multi-layer sound attenuating acoustic panel
RU2532513C1 (en) * 2013-07-22 2014-11-10 Олег Савельевич Кочетов Sound absorbing element (versions)

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