Acoustic dissipation elements for operational buildings

FIELD: construction.

SUBSTANCE: the invention relates to industrial acoustics, specifically to broadband acoustic suppression. The acoustic dissipation elements contain a molded wall and a perforated wall with an acoustic dissipation layer between them. The acoustic dissipation elements contain a carcass, window openings, door openings, openings for lighting placement and acoustic protection in the form of molded walls and perforated walls with an acoustic dissipation layer between them. The floor has elastic foundation and contains a foundation platform made of concrete reinforced with oscillation dampening, which is installed on the foundation plate of the floor deck with cavities in oscillation dampening and water-proof materials with a gap between it and the bearing wall of the operational building. The cavities of the base plate are filled with oscillation dampening materials, such as foamed polymer. The acoustic dampening elements are installed in two layers. The first layer is more tough, it is solid and molded, with a complex profile consisting of inclined planes oriented down and connected with horizontal planes which have resonance holes. The second layer is soft, non-continuous and positioned below the sound-reflecting surfaces of the first layer. The solid profiled layer of the acoustic dampening material is made of material which has acoustic reflectivity coefficient greater than its own acoustic absorption coefficient. The acoustic dampening elements installed above the most noisy equipment contain a carcass hung by hooks, for example, by cable wires, or fixed directly to the tough wall or the ceiling of the operational building. The carcass is wrapped in foil on the outside to prevent dust accumulation. A reactive resonance piece is fixed to the bottom of the carcass, the piece is divided by walls with holes which function as Helmholtz resonator inlets, installed in series. The active part of acoustic dampening elements is a cavity between the carcass and the piece, filled with acoustic absorbing material. It is filled with acoustic absorbing non-combustible material, such as vinypore, fibreglass, with a protective layer of glass fabric.

EFFECT: improved acoustic dampening.

4 dwg

 

The invention relates to acoustics, in particular to broadband samohlasen, and can be used in all sectors of national economy under the maximum sound attenuation functions of production equipment by the method of absorption.

The closest technical solution to the technical essence and the achieved result is a device for RF patent No. 2366785, CL EV 1/84, [prototype], containing the skeleton on the floor of the building and the walls with sound-absorbing lining.

The disadvantage of the prototype is relatively low effectiveness of sound attenuation due to partial reflection of sound waves from the absorber and relatively narrow (very high frequency) the range of noise control.

The technical result - increasing the efficiency of absorption.

This is achieved by the fact that the sound-absorbing elements of the room containing shaped and perforated walls, between which is placed a layer of sound absorbing material, and one of the walls is made smooth, and the sound-absorbing material is in two layers, one of which, more rigid, made a solid and profiled, and the other, soft, made discontinuous and is located beneath the surface of the first layer, sound-absorbing elements of the premises contain a frame, window, door openings, the openings to accommodate the Metalnikov and acoustic enclosures, made in the form of a rigid and perforated walls, between which is located an absorbent material located in two layers, one of which, more rigid, made a solid and profiled, complex profile, consisting of inclined faces that are directed downward and connected to the horizontal edges, which are made of resonant holes, and the other is soft, made discontinuous and is located under the sound-reflecting surfaces of the first layer, and a continuous profiled layer of sound-absorbing material made of a material whose coefficient of reflection of sound is greater than the coefficient of sound absorption.

Figure 1 shows a diagram of the premises, figure 2 - design sound absorbing acoustic fencing areas, figure 3 - element design of the absorber above the most noisy equipment, figure 4 - diagram of the floor slabs on an elastic Foundation.

Sound-absorbing elements of the premises contain the skeleton of a plant (not shown), window 2 and 8, the door 9 openings, the openings 5 for placing lamps and acoustic enclosures 1, 3, 4, 10, 12 (1). Acoustic enclosures (figure 2), made in the form of a rigid 13 and perforated walls 14, between which is located an absorbent material located in two layers, one of which, more than 20 hard, you Olsen solid and profiled, complex profile, consisting of inclined faces 15 and 17, directed downward and connected to the horizontal edges 18, which is made of resonant holes 19, and the other soft 16, made discontinuous and is located under the sound-reflecting surfaces of the first layer 20.

Solid profiled layer of sound-absorbing material 20 made of a material whose coefficient of reflection of sound is greater than the coefficient of sound absorption. Items 6 and 7 of the absorber above the most noisy technological equipment 11 contain a frame 21 which is hooked over the hooks 22, for example, wires (not shown) or directly attached to a rigid wall or ceiling industrial premises. The frame 21 is covered with the outer side of the foil, preventing the deposition of dust. To the bottom 23 of the frame with the inner side of the fixed reactive resonance box 24, separated by partitions 25 and 27, with the holes 26 and 28 that performs the functions of the necks of Helmholtz resonators installed in this case series. The active part of the elements of material is a filled with sound-absorbing material 29 of the cavity between the frame 21 and the insert 24. Filling exercise absorbent non-flammable material (for example, Vinprom, fiberglass) with a protective layer 30 of fiberglass, p is eduversum the roll of absorbent material. The shape of the frame 21 and the insert 24 can be any (for example, round or polyhedral shape), and the frame 21 may be perforated to increase the surface absorption. The equipment 11 is installed on the vibration-insulating supports (not shown), the window openings 2, 8 contain a vacuum insulating glass units, and as a sound-absorbing material acoustic fencing areas and elements of the heat sinks used ceramics with porosity in the range of optimal values: 30...45% or element is used in the form of layer-by-layer and cross-winding of the porous yarn wound on acoustically transparent frame, for example the wire frame (not shown) or an item from a rigid porous sound-absorbing material, such as metalloboranes or stone, shell (not shown).

The floor structure on an elastic Foundation (figure 2) contains the installation plate 31 made of reinforced fibrogenesis material of concrete, which is installed on the base plate 34 floors with the cavity 35 through the layers vibrationfree material 33 and waterproofing material 32 with a gap 36 relative to the bearing walls industrial premises. In order to provide effective vibration isolation mounting plate 31 registration of birth, directions, layers vibrationfree material 33 and waterproofing material 32 is made flared, tight to the joists walls and base of the carrier plate 34 overlap. For efficiency, sound insulation and sound absorption in the shops, under floor ceiling cavity 35 is filled fibrogenesis material, such as foamed polymer, such as polyethylene or polypropylene, and the walls are lined with sound-absorbing structures.

Sound-absorbing elements are as follows.

Sound waves propagating in the production area interact as follows. Sound energy from equipment 11 in the room, passing through the perforated wall 14 of acoustic enclosures 1, 3, 4, 10, 12, gets on the layers of soft absorbent material 16 (for example made of basalt or glass fiber), which is made discontinuous and is located under the sound-reflecting surfaces of the first layer 20. The transfer of sound energy into heat (dissipation, the dissipation of energy occurs in the pores of the material, which represents a model of cavities "Helmholtz", where energy losses occur due to friction oscillating with the frequency of excitation of the mass of air in the mouth cavity wall itself the neckline, having a form of an extensive network of pores of the material. The ratio of the perforation of the perforated wall is equal or greater than 0.25. To prevent rashes soft absorbers provided by the glass, such as type EZ-100, located between the absorber and the perforated wall.

Items 6 and 7 of the material with the reactive and the active elements are as follows. The interaction of sound waves with active cavities filled with non-combustible absorbent 29, causes samohlasen in the high frequency range, and by performing these cavities inclined increases the surface sound absorption and, consequently, increases the sound absorption coefficient. A resonant cavity can also be completely or partially filled with material depending on the desired frequency range of the noise.

When installing on revealing equipment on the plate 31 is a two-stage vibration protection due vibrocentric inclusions in the weight plates 31, and through the layer vibrationfree material 33, which can be used: needle-punched mats type Vibrocil" on the basis of silica or aluminosilicate fiber, the material of the solid vibrocentric materials, such as plastic, sound the plates on the basis of glass staple fiber type Solotop" with the density of the material, 60÷80 kg/m3.

Sound-absorbing elements of the room containing shaped and perforated walls, between which is placed a layer of sound absorbing material, sound-absorbing elements of the premises contain a frame, window, door openings, openings for placement of lamps and acoustic enclosures are made in the form of a rigid and perforated walls, between which is located the sound-absorbing material, and the floor is made on an elastic Foundation and contains the installation plate, made of reinforced fibrogenesis material of concrete, which is installed on the base plate floors with cavities through the layers vibrationfree material and waterproofing material with a gap relative to the supporting walls of the production of space, and the cavity of the base plate filled fibrogenesis material, for example foamed polymer, characterized in that arranged in two layers, one of which, more rigid, made a solid and profiled, complex profile, consisting of inclined faces that are directed downward and connected to the horizontal edges, which are made of resonant holes, and the other is soft, made discontinuous and is located under the sound-reflecting surfaces of the first layer, and a continuous profiled layer zvokopola is its material is made from a material whose reflection coefficient of sound is greater than the coefficient of sound absorption, and elements of material over the most noisy technological equipment contain a frame which is hooked over the hooks, for example, on the ropes, or directly attached to a rigid wall or ceiling industrial premises, and the frame is covered with the outer side of the foil, preventing the deposition of dust, and to the bottom of the frame with the inner side of the fixed reactive resonance box, separated by partitions, with holes that act necks of Helmholtz resonators arranged in series, and an active part of the elements of material is a filled with sound-absorbing material in the cavity between the frame and the insert, while the filling is made of absorbent non-combustible material, such as viviparum, fiberglass, with a protective layer of glass.



 

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