RU2018141699A - METHOD OF SOUND INSULATION OF EQUIPMENT AND SOUND INSULATION FENCE - Google Patents

Claims (4)

1. The method of sound insulation of equipment, which consists in the fact that the soundproof fence is installed on the ceiling of the building by means of at least four vibration-absorbing supports made of elastic material, for example soft rubber, polyurethane, and is lined on the inside with a sound-absorbing element, characterized in that that the soundproof fence is made 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 on at least four vibration-isolating supports that are based on the ceiling of the building, while between the base of the technological equipment and a cutout in the lower face of the rectangular parallelepiped perform a gap designed to exclude the transmission of vibrations from technological equipment to a soundproof fence, in which ventilation ducts are made to eliminate overheating of the equipment, while The lower walls of the ventilation ducts are treated with sound-absorbing material and acoustically transparent material of the “visible” type, while the sound-absorbing element is fixed on the inner surface of the sound-insulating 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 fencing, dB, 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; 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 _оi is the total area of technological holes for the i-th machine casing, m ² ; ΣS _i - total area of the solid part of the fence, m ² . 2. 3-sound insulating fence made in the form of a rectangular parallelepiped, covering technological equipment, characterized in that the technological equipment is installed on at least four vibration-isolating supports that are based on the ceiling of the building, while between the base of the technological equipment and the cutout in the lower face of the rectangular the parallelepiped is made a gap designed to prevent the transmission of vibrations from technological equipment to the soundproof fence, and ventilation ducts are made in the soundproof fence to eliminate overheating of the equipment, while the inner walls of the ventilation ducts are treated with sound-absorbing material and acoustically transparent material of the “seen” type, while on the inside a sound-absorbing element is fixed to the surface of the soundproof fence in the form of smooth and perforated surfaces between which a multilayer sound-absorbing structure is placed, which is filled with a complex shape and is an alternation of solid sections and hollow sections, while continuous sections are formed by smooth prismatic surfaces located perpendicular to smooth and perforated surfaces and fixed to a smooth surface, as well as two surfaces connected with them and inclined, relatively smooth prismatic surfaces complex shapes, having on one side a smooth surface, and on the other hand a serrated or wavy, and embossed sound-absorbing elements, for example, in the form of tetrahedrons, are attached to the smooth surface, while the material based on aluminum-containing alloys is used as sound-absorbing material, 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 foam aluminum or mineral wool or glass wool fiberglass cladding Ohm, or foamed polymer, and the material of the perforated surface is made of solid, decorative vibration damping materials, such as plastic compounds such as Agate, Anti-Vibrate, Shvim, and the inner surface of the perforated surface facing the sound-absorbing structure is lined with acoustically transparent material, for example, fiberglass type EZ-100 or polymer type "Poviden", and the hollow sections are filled with sound-absorbing material, such as construction foam.