RU2019136027A - EQUIPMENT SOUND INSULATION METHOD - Google Patents

Claims (9)

The method of soundproofing equipment, which consists 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 lined with a sound-absorbing element from the inside, while the soundproofing fence is made according to shape in the form of a rectangular parallelepiped with a cut in its lower edge for the base of the process equipment, while the base of the process equipment is installed on at least four vibration-isolating supports, which are based on the floor of the building, while between the base of the process equipment and the cut in the lower edge of the rectangular parallelepiped a gap designed to exclude the transmission of vibrations from the process equipment to the soundproof fence, in which ventilation ducts are made to eliminate overheating of the equipment, while the inner walls of the valve The sound-absorbing channels 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

- required sound insulation of the casing, dB; R _si - 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 _o is 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; ΣS _m - 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 hole without a 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 - 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 solid sections and hollow sections, the frame of which is made of a rigid sound-absorbing material based on aluminum-containing alloys, and the hollow sections formed by prismatic surfaces are filled with a soft sound-absorbing material, inside the hollow sections, the inner surfaces of which have a serrated structure, additional resonant elements are located, 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 ek are made of sound-reflecting material based on magnesia binder with reinforcing fiberglass or fiberglass, or sound-reflecting material based on foil, or fiberglass, or carbon fiber, or plastic containing carbon fibers as a reinforcing filler.