RU2017112279A - SOUND INSULATION METHOD - Google Patents

Claims (3)

 The method of soundproofing the equipment, 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 shaped in the form of a rectangular parallelepiped with a cutout in its lower face under the base of technological equipment, while the base of technological equipment is installed they are pressed onto 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 enclosure in which the ventilation ducts to eliminate overheating of the equipment, while the internal walls of the ventilation ducts are treated with sound-absorbing material and acoustically “visible” type material, while the sound-absorbing element is fixed on the inner surface of the soundproof fence and is made in the form of smooth and perforated surfaces, between which a multilayer sound-absorbing structure is placed, and the calculation of the required sound insulation of the casing as an unpressurized fence, dB, is carried out according to 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; ΣS _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 _оi is the 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 an air gap relative to the sound-reflecting layer to have a third discontinuous layer of soft sound-absorbing material, which is fixed to 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.