SOUNDPROOFING ENCLOSURE Russian patent published in 2018 - IPC E04B1/82 F16P1/02 F16F15/00 

FIELD: acoustics.

SUBSTANCE: invention relates to soundproofing of the equipment. Soundproofing enclosure is made in the form of a rectangular parallelepiped covering the process equipment. Process equipment is installed on at least four vibration-proof supports, which are based on the building floor slab. Between the process equipment base and the cutout in the rectangular parallelepiped lower face, a gap is made designed to prevent the vibrations transfer from the process equipment to the soundproof enclosure. In the soundproof enclosure, ventilation ducts are made to eliminate equipment overheating. Ventilation ducts internal walls are treated with a sound-absorbing material and an acoustically transparent material of the "Poviden" type. On the soundproofing enclosure inner surface, a sound-absorbing element in the form of a smooth and perforated surfaces is secured, between which a multi-layer sound-absorbing construction of complex shape is placed, which is an alternation of solid and hollow sections. Solid sections are formed by smooth prismatic surfaces located perpendicular to the smooth and perforated surfaces and fixed to a smooth surface, and also by two surfaces of complex shape connected thereto and inclined relative to smooth prismatic surfaces, having on the one side a smooth surface, and on the other side is toothed or wavy one. To the smooth surface tridimensional sound-absorbing elements are attached, for example, in the form of tetrahedra. Inner surface of perforated surface facing sound-absorbing structure is lined with acoustically transparent material, for example, glass fabric EZ-100 or polymer of "Poviden" type. Hollow sections are filled with sound-absorbing material, such as construction and installation foam. Or the sound-absorbing element, fixed on the sound-insulating fence inner surface, is made in the form of a solid rigid and perforated walls, between which the sound-absorbing element is arranged, made in the form of four layers: first layer, sound-reflecting, is made solid and profiled, of complex polyhedral profile, consisting of inclined edges in the lower part connected by horizontal edges, and between the edges and the rigid wall a second layer of sound-absorbing material is arranged. Between the perforated wall and the sound-reflecting layer, with an air gap relative to the sound-reflecting layer, the third intermittent layer of soft sound-absorbing material is arranged, which is secured to the perforated wall and is made in the form of polyhedrons, with equidistant and congruent surfaces located under the corresponding sides of the acoustic layer. Continuous sound-reflecting profiled layer is made of a material in which the sound reflection coefficient is greater than the sound absorption coefficient, wherein the perforated wall perforation coefficient is assumed to be equal to or greater than 0.25.

EFFECT: invention makes it possible to improve the efficiency of noise suppression.

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