RU2018112857A - SOUND INSULATION METHOD - Google Patents

Claims (4)

1. The soundproofing method, which consists in the fact that the soundproofing fence is installed on the floor of the building by means of at least four vibration-isolating supports made of elastic material, for example soft rubber, polyurethane, and is lined on the inside with a sound-absorbing element, the soundproofing fence is made according to in the form of a rectangular parallelepiped with a cutout in its lower face under the base of the technological equipment, while the base of the technological equipment is installed and at least four vibration-isolating supports based on the floor of the building, while a gap is made between the base of the technological equipment and the cutout in the lower face of the rectangular parallelepiped to prevent transmission of vibrations from the technological equipment to the soundproof fence, in which ventilation ducts for eliminate overheating of the equipment, while the internal walls of the ventilation ducts are treated with sound-absorbing material and acoustically transparent erialom type "poviden", the sound absorbing member is fixed on the inner surface of the sound-insulating fence and operate in a smooth and perforated surfaces, between which is placed a multilayered acoustic structure, the calculation of required insulation casing as unsealed enclosure, dB is performed by the following relationship

where R _leather.tr is the required sound insulation of the casing, dB, R _si is the average sound insulation of the solid part of the fencing of the i-th casing, dB;

- reverberation coefficient of sound absorption inside the i-th casing; where α _about - the reverberation coefficient of sound absorption for fences without sound-absorbing material; α _m - reverberation coefficient of sound absorption of sound-absorbing material; Σ S _M is the area of application of sound-absorbing material, m ² , τ _i is the energy coefficient of sound transmission through the silencer of the technological hole (for a simple hole τ _i = 1, and a simple hole is considered to be a hole without a silencer, as in our case); ΣS _oi - total area of technological holes for the i-th machine casing, m ² ; ΣS _i is the total area of the solid part of the fence, m ² , characterized in that the multilayer sound-absorbing structure of the sound-absorbing element, which is fixed on the inner surface of the sound-proof fence, is made in four layers: the first layer, sound-reflecting, is made continuous and profiled, of a complex multifaceted profile, consisting of inclined faces connected in the lower part by horizontal faces, and between the faces and the rigid wall there is a second layer of sound-absorbing material, while I am waiting for the perforated wall and the sound-reflecting layer, with the air gap relative to the sound-reflecting layer, have a third discontinuous layer of soft sound-absorbing material, which is mounted on the perforated wall, and is made in the form of polyhedra, with equidistant and congruent surfaces located under the corresponding faces of the sound-reflecting layer, this sound-absorbing element with which the casing is lined on the inside is made in the form of rigid and perforated walls, between which a multilayer sound-absorbing element is considered, which is made in the form of two layers: one of which adjacent to the rigid wall is sound-absorbing, and the other adjacent to the perforated wall is perforated from a sound-reflecting material of a complex profile consisting of uniformly distributed hollow tetrahedrons, while as a sound-reflecting material, a material based on aluminum-containing alloys is 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 foamed aluminum, or soundproofing boards based on glass staple fiber of the Shumostop type with a material density of 60 ÷ 80 kg / m ³ , or a material based on a magnesian binder with reinforcing fiberglass or fiberglass. 2. The sound insulation method according to claim 1, characterized in that a porous sound-absorbing ceramic material having a bulk density of 500 ÷ 1000 kg / m and consisting of 100 mass parts of perlite is used as a sound-absorbing material of a layer of a sound-absorbing element with which the casing is lined from the inside. with a particle diameter of 0.5 ÷ 2.0 mm, 100 ÷ 200 mass parts of one or more sintering materials and 10 ÷ 20 mass parts of a binder, or polyester, or porous fiber or enisty sound-absorbing material, which is formed on the basis of basalt or glass fibers or open-cell polyurethane foam with a protective shell sound transmission from a thin fiberglass or aluminized Mylar film.