RU2598253C1 - Combined kochetov sound-absorbing structure - Google Patents

Combined kochetov sound-absorbing structure Download PDF

Info

Publication number
RU2598253C1
RU2598253C1 RU2015138235/03A RU2015138235A RU2598253C1 RU 2598253 C1 RU2598253 C1 RU 2598253C1 RU 2015138235/03 A RU2015138235/03 A RU 2015138235/03A RU 2015138235 A RU2015138235 A RU 2015138235A RU 2598253 C1 RU2598253 C1 RU 2598253C1
Authority
RU
Russia
Prior art keywords
sound
absorbing
layer
perforated
rigid
Prior art date
Application number
RU2015138235/03A
Other languages
Russian (ru)
Inventor
Олег Савельевич Кочетов
Original Assignee
Олег Савельевич Кочетов
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Олег Савельевич Кочетов filed Critical Олег Савельевич Кочетов
Priority to RU2015138235/03A priority Critical patent/RU2598253C1/en
Application granted granted Critical
Publication of RU2598253C1 publication Critical patent/RU2598253C1/en

Links

Images

Abstract

FIELD: acoustics.
SUBSTANCE: invention relates to industrial acoustics, specifically to sound-absorbing combined structure. Comprises rigid and perforated surface between which there is a sound absorbing element. Latter consists of three layers. First layer is intermittent and composite. Layer consists of alternating sections in form of solid prismatic surfaces. Surfaces are made of sound-absorbing material. On both sides of said surfaces there are hollow shaped sections of profile in plane, perpendicular to rigid and perforated surfaces, is a rhombus. Inner walls of rhombus are composed of toothed sound-reflecting surface. Fixation of shaped areas is performed to rigid and perforated surfaces. Toothed surface is made in form of reflecting surface of material, in which sound reflection factor is higher than that of sound absorption. Second layer is a cavity between first layer and rigid and perforated surfaces. Cavities are filled with sound absorbing material, for example, construction sealing foam. Third layer prevents precipitation of sound-absorbing material and is acoustically transparent, for example from glass fabric of EZ-100 or polymer "Poviden" type. Third layer is located between second layer and perforated surface.
EFFECT: higher efficiency of sound absorption and reliability of design overall.
4 cl, 1 dwg

Description

The invention relates to industrial acoustics.
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 the reliability of the structure as a whole.
This is achieved by the fact that in a sound-absorbing combined structure containing a rigid and perforated surface, between which a sound-absorbing element is placed, the sound-absorbing element consists of three layers, while the first layer is intermittent and combined, consisting of alternating sections in the form of continuous prismatic surfaces made of sound-absorbing material, on both sides of which there are hollow profiled sections, the profile of which is in a plane perpendicular to the rigid and perforated oriented surfaces, it is a rhombus, the inner walls of which are made in the form of a serrated sound-reflecting surface, and the profiled sections are fixed to rigid and perforated surfaces, and the serrated surface is made in the form of a sound-reflecting surface of a material whose sound reflection coefficient is greater than the sound absorption coefficient, the second layer is a void between the first layer and the rigid and perforated surfaces that are filled with sound absorbing material, for example, constructional sealing foam, and the third layer prevents the precipitation of sound-absorbing material and is made acoustically transparent, for example, of fiberglass type EZ-100 or polymer type "Poviden", and is located between the second layer and the perforated surface.
The drawing shows a diagram of a sound-absorbing combined structure.
The sound-absorbing combined structure is made in the form of a rigid 1 and perforated 2 surfaces, between which is placed a sound-absorbing element consisting of three layers, the first layer being intermittent and combined, consisting of alternating sections in the form of continuous prismatic surfaces 3 made of sound-absorbing material, according to both sides of which are hollow profiled sections 4, the profile of which in the plane perpendicular to the rigid 1 and perforated to 2 surfaces is there is a rhombus 6, the inner walls of which are made in the form of a toothed sound-reflecting surface 5, and the fixing of the profiled sections 4 is carried out to the hard 1 and perforated 2 surfaces. The toothed surface 5 is made in the form of a sound-reflecting surface of material, in which the reflection coefficient of sound is greater than the coefficient of sound absorption.
The second layer 7 represents voids between the first layer and the rigid 1 and perforated 2 surfaces that are filled with sound-absorbing material, for example, construction sealing foam, which improves the soundproof properties of the structure as a whole by filling the voids formed by the layers, and also increases the reliability of the structure as a whole its installation on equipment operating in conditions with increased shock and vibration loads.
The third layer 8 prevents the precipitation of sound-absorbing material and is made acoustically transparent, for example of fiberglass type EZ-100 or polymer type "Poviden", and is located between the second layer 7 and perforated 2 surface.
As a material of the sound-reflecting surface of the internal gear surfaces of the first layer, 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, bending strength in the range of 10 ... 20 MPa, for example foam aluminum.
As sound-absorbing material of continuous prismatic surfaces 3 of the first layer, 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.
The material of the perforated surface 2 is made of solid, decorative vibration-damping materials, for example, plastic compounds of the type "Agate", "Anti-Vibrate", "Shvim".
Sound-absorbing combined design works as follows.
Sound energy, passing through a layer of perforated surface 2 and the second layer 7 of a sound-absorbing element made of foamed sound-absorbing material, falls on a continuous prismatic surface 3, where the sound energy is converted into thermal energy (dissipation, energy dissipation), i.e. in the pores of the sound absorber, which are the Helmholtz resonator model, and there are loss of sound energy due to friction oscillating 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, and also gets inside the diamond-shaped voids 6 on gear sound-reflecting surfaces 5, where there is multiple reflection of sound energy and its reduction in the pores of sound-absorbing material of continuous diamond-shaped sections of the surface Ostey 5.

Claims (4)

1. Sound-absorbing combined structure containing a rigid and perforated surface, between which is placed a sound-absorbing element, characterized in that the sound-absorbing element consists of three layers, while the first layer is intermittent and combined, consisting of alternating sections in the form of continuous prismatic surfaces made of sound-absorbing material, on both sides of which there are hollow profiled sections, the profile of which is in a plane perpendicular to the rigid and perforated surface, is a rhombus, the inner walls of which are made in the form of a serrated sound-reflecting surface, and the profiled sections are fixed to rigid and perforated surfaces, and the serrated surface is made in the form of a sound-reflecting surface of a material whose sound reflection coefficient is greater than the sound absorption coefficient, the second layer is a void between the first layer and the rigid and perforated surfaces, which are filled with sound absorbing material, such a construction sealing foam and a third layer prevents precipitation of sound absorbing material and adapted acoustically transparent, for example glass fiber type EG-100 or the type of polymer "Poviden", and is located between the second layer and the perforated surface.
2. The sound-absorbing combined structure according to claim 1, characterized in that a material based on aluminum-containing alloys is used as the material of the gear sound-reflecting surface, followed by filling them with titanium hydride or air with a density in the range 0.5 ... 0.9 kg / m 3 s 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.
3. The sound-absorbing combined structure according to claim 1, characterized in that rockwool type mineral wool, or URSA type mineral wool, or P-75 type basalt wool, is used as the material of continuous prismatic surfaces of the first layer glass wool with glass wool lining, or foamed polymer, for example polyethylene or polypropylene.
4. The sound-absorbing combined structure according to claim 1, characterized in that the material of the perforated surface is made of solid, decorative vibration-damping materials, for example, plastic compounds such as "Agate", "Anti-vibration", "Shvim".
RU2015138235/03A 2015-09-08 2015-09-08 Combined kochetov sound-absorbing structure RU2598253C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2015138235/03A RU2598253C1 (en) 2015-09-08 2015-09-08 Combined kochetov sound-absorbing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2015138235/03A RU2598253C1 (en) 2015-09-08 2015-09-08 Combined kochetov sound-absorbing structure

Publications (1)

Publication Number Publication Date
RU2598253C1 true RU2598253C1 (en) 2016-09-20

Family

ID=56937777

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2015138235/03A RU2598253C1 (en) 2015-09-08 2015-09-08 Combined kochetov sound-absorbing structure

Country Status (1)

Country Link
RU (1) RU2598253C1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213516A (en) * 1978-11-29 1980-07-22 American Seating Company Acoustical wall panel
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
US8074766B1 (en) * 2009-09-08 2011-12-13 Creative Composites, Ltd Multi-layer sound attenuating acoustic panel
RU2524730C1 (en) * 2013-07-22 2014-08-10 Олег Савельевич Кочетов Acoustic finishing of production premises
RU2532513C1 (en) * 2013-07-22 2014-11-10 Олег Савельевич Кочетов Sound absorbing element (versions)
RU2543826C2 (en) * 2013-07-22 2015-03-10 Олег Савельевич Кочетов Shop acoustic finishing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213516A (en) * 1978-11-29 1980-07-22 American Seating Company Acoustical wall panel
RU2993U1 (en) * 1995-05-18 1996-10-16 Московская государственная текстильная академия им.А.Н.Косыгина Noise-absorbing panel "impulse"
US8074766B1 (en) * 2009-09-08 2011-12-13 Creative Composites, Ltd Multi-layer sound attenuating acoustic panel
RU2524730C1 (en) * 2013-07-22 2014-08-10 Олег Савельевич Кочетов Acoustic finishing of production premises
RU2532513C1 (en) * 2013-07-22 2014-11-10 Олег Савельевич Кочетов Sound absorbing element (versions)
RU2543826C2 (en) * 2013-07-22 2015-03-10 Олег Савельевич Кочетов Shop acoustic finishing

Similar Documents

Publication Publication Date Title
RU2532513C1 (en) Sound absorbing element (versions)
RU2613061C1 (en) Sound-absorbing element of kochetov with resonant inserts
RU2583448C2 (en) Kochetov sound-absorbing element
RU2511868C1 (en) Chamber noise muffler
RU2571109C1 (en) Kochetov's acoustic screen for safe operator work
RU2607484C1 (en) Noise absorbing wall panel
RU2611649C1 (en) Sound-absorbing element
RU2511858C1 (en) Element of noise muffler by kochetov
RU2646072C1 (en) Sound absorption structure for industrial building wall covering
RU2581174C1 (en) Acoustic screen for safe operation of operator
RU2648127C1 (en) Sound-absorbing structure with resonant inserts
RU2568799C1 (en) Multi-section noise suppressor
RU2598253C1 (en) Combined kochetov sound-absorbing structure
RU2609482C1 (en) Kochetov multilayer combined structure
RU2588006C1 (en) Sound-absorbing composite structure
RU2578227C1 (en) Sound absorbing element
RU2598252C1 (en) Kochetov sound-absorbing structure
RU2598249C1 (en) Sound absorbing structure
RU2523327C1 (en) Sound absorbing element
RU2556544C1 (en) Sound-absorbing element
RU2645381C1 (en) Sound absorption element with resonant inserts
RU2658083C2 (en) Acoustic screen
RU2560447C1 (en) Kochetov's sound absorbing element
RU2568801C1 (en) Complex noise suppressor
RU2655109C1 (en) Sound absorbing element