RU2019127513A - 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 _{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;

- 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; ∑S _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); ∑S _oi - total area of technological holes for the i-th casing of the machine, m ² ; ∑S _i is the total area of the solid part of the fence, m ² , 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, as which used amorphous boron or boron nitride, and a surfactant, while silica fiber having a diameter of 4-10 microns was used as the silicon dioxide fibers, an aqueous solution of one of the substances selected from a group including methyl cellulose, carboxymethyl cellulose 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. 2. The method of soundproofing equipment according to claim 1, characterized in that the vibration-isolating supports, on which the base of the technological equipment is installed, based on the overlap of the production building, is made in the form of a washer mesh vibration isolator containing a base in the form of a plate with mounting holes, a mesh elastic element, with the lower part resting on the base and fixed by the lower washer, rigidly connected to the base, and by the upper part fixed by the upper pressure washer, rigidly connected to the centrally located piston, male with a gap, coaxially located sleeve, rigidly connected to the base, while between the base and the upper pressure washer an elastic damping element is located with a washer, consisting of an upper and lower, oppositely located Belleville springs, made in the form of truncated cone surfaces, and the larger base of the truncated cone of the upper Belleville spring is located on the inner surface of the upper thrust washer, and the larger base of the truncated cone of the lower Belleville spring is located on the base, while the smaller bases of the truncated cone of the upper and lower Belleville springs are interconnected by the outer surface of the cylindrical ring, the inner surface of which covers the outer surface of the sleeve coaxially located with it, while the inner surface of the cylindrical ring is covered with a friction material.