SOUND-INSULATING ENCLOSURE Russian patent published in 2017 - IPC E04B1/82 G10K11/16 

FIELD: machine engineering.

SUBSTANCE: sound-insulating enclosure made in the form of a rectangular parallelepiped enclosing the process equipment, the process equipment is mounted on at least four vibration-insulating supports which are based on the floor of the building. A gap is made between the base of process equipment and a cut in the lower edge of the rectangular parallelepiped to prevent transmission of vibrations from the process equipment to the sound-insulating enclosure. Ventilation channels are made in a sound-insulating guard to prevent equipment overheating. The inner walls of the ventilation channels are treated with a sound-absorbing material and an acoustically transparent material of "Poviden" type. A sound-absorbing element in the form of smooth and perforated surfaces is fixed on the inner surface of the sound-insulating enclosure. The sound-absorbing element is made in the form of smooth and perforated surfaces, between which a multilayer sound-absorbing structure is placed, which is made of a complex shape and represents alternation of solid sections and hollow sections. Solid sections are formed by smooth prismatic surfaces arranged perpendicular to the smooth and perforated surfaces and fixed to the smooth surface, and two surfaces of complex shape related thereto and inclined with respect to smooth prismatic surfaces and having smooth surface on one side and toothed or wavy surface on the other side, relief sound-absorbing elements are attached to the smooth surface, for example, in the form of tetrahedrons. As the sound-absorbing material, the material based on aluminium-containing alloys is used, followed by its filling with titanium hydride or air with the density within 0.5…0.9 kg/m³ with the following strength properties: the compressive strength within 5…10 MPa, the bending strength within 10…20 MPa, for example the foam aluminium. The inner surface of the perforated surface facing the sound-absorbing structure is lined with an acoustically transparent material, and the hollow sections are filled with sound-absorbing material. Vibration insulator of vibration insulation system, on which the process equipment is installed and which is based on the floor of the building, comprises a body made in the form of a supporting elements comprising washers, bolts and nuts, positioned coaxially and opposite to elastic element in its upper and lower parts, and made in the form of a shell made of elastomer, consisting of flat mounting surfaces, on which the support elements are fixed, and a cylindrical surface located in the central perpendicular section relative to axes of support elements and conical surfaces positioned between the mounting surfaces and the cylindrical surface and connected thereto into a single shell.

EFFECT: improved noise silencing efficiency.

2 cl, 4 dwg