RU2019132365A - EQUIPMENT SOUND INSULATION METHOD - Google Patents

Claims (5)

1. A method of soundproofing equipment, consisting in the fact that a soundproofing fence is installed on the floor of a building by means of at least four vibration-insulating supports made of an elastic material, for example, soft rubber, polyurethane, and lining it from the inside with a sound-absorbing element, while soundproofing the fence is made in the form of a rectangular parallelepiped with a cutout in its lower edge for the base of the technological equipment, while the base of the technological equipment is installed on at least four vibration-insulating supports, which are based on the floor of the building, while between the base of the technological equipment and the cutout in the lower edge of the rectangular parallelepiped makes a gap designed to exclude the transmission of vibrations from the technological equipment to the soundproofing fence, in which ventilation ducts are made to eliminate the overheating of the equipment, while the inner walls ventilation ducts are treated with sound-absorbing material and acoustically transparent material of the "poviden" 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 unsealed enclosure, dB is carried out according to the following relationship:

where R _skin..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;

- the 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 - the reverberation coefficient of sound absorption of the sound-absorbing material; Σ S _m is the area of application of the 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 hole without a noise silencer is considered a simple hole, as in our case); ΣS _oi - total area of technological holes for the i-th casing of the machine, m ² ; ΣS _i is the total area of the solid part of the fence, m ² , characterized in that the sound-absorbing element, which is fixed on the inner surface of the sound-insulating fence, is made in the form of smooth and perforated surfaces, between which a combined sound-absorbing layer of complex shape is placed, which is an alternation of continuous sections and hollow sections, the frame of which is made of a rigid sound-absorbing material based on alumina-containing alloys, and the hollow sections formed by prismatic surfaces are filled with a soft sound-absorbing material made of mineral wool on a basalt basis such as "Rockwool", or "URSA", or basalt wool of the P-75 type in this case, the cavities of hollow sections formed by prismatic surfaces are connected by resonance holes with cavities formed by smooth and perforated surfaces, between which a combined sound-absorbing layer of complex shape is located, and inside the hollow sections, in The inner surfaces of which have a toothed structure, have additional resonant elements made in the form of spherical shells, the inner surface of which is connected by resonant inserts with cavities located between the perforated surface and solid sections of the sound-absorbing element, while additional resonant elements made in the form of spherical shells are made of sound-reflecting material based on magnesia binder with reinforcing fiberglass or fiberglass, or from sound-reflecting material based on foil, or fiberglass, or carbon fiber, or plastic containing carbon fibers as a reinforcing filler. 2. A method of soundproofing equipment according to claim 1, characterized in that the hollow areas formed by prismatic surfaces are filled with a heat-resistant highly porous fibrous heat-insulating and sound-absorbing material made of a mineral filler in the form of silicon dioxide fibers, a binder, a sintering additive, which is used as an amorphous boron or boron nitride, and a surfactant, while silica fiber having a diameter of 4-10 microns is used as the silicon dioxide fibers, an aqueous solution of one of the substances selected from the group including methylcellulose, carboxymethylcellulose or carboxymethyl starch, the content of which is 2-5 wt. %, and additionally the material contains silica sol with the following ratio of components, wt. %: Silica fiber with a diameter of 4-10 microns 75.0-93.0 Amorphous boron or boron nitride 0.2-0.5 Silica 7.0-25.0