RU2018114036A - METHOD OF SOUND INSULATION OF EQUIPMENT - 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 floor 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 is technological The equipment is installed on at least four vibration-isolating supports based on the floor of the building, while a gap is made between the base of the technological equipment and the cutout in the lower face of the rectangular parallelepiped to prevent the transmission of vibrations from the technological equipment to the soundproof fence, in which ventilation ducts to eliminate equipment overheating, while the inner walls of the ventilation ducts are treated with a sound-absorbing material rial and acoustically transparent material of the “visible” type, while the sound-absorbing element is fixed on the inner surface of the soundproof fence and is made in the form of smooth and perforated surfaces, between which a multilayer sound-absorbing structure is placed, and the required sound insulation of the casing, as an unpressurized fence, dB, is calculated according to following dependency:

, 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 _o - reverberation coefficient of sound absorption for fences without sound-absorbing material; α _m - reverberation coefficient of sound absorption of sound-absorbing material; ΣS _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 _oi is the total area of technological holes for the i-th machine casing, m ² ; ΣS _i is the total area of the solid part of the fence, m ² , while the sound-absorbing element, which is fixed on the inner surface of the sound-proof fence, is made in the form of rigid and perforated walls, between which there is a multilayer sound-absorbing element, which is made in the form of two layers: one of which, adjacent to the rigid wall is sound-absorbing, and the other adjacent to the perforated wall is made with perforation of sound-reflecting material of a complex profile, consisting of uniformly spredelennyh hollow tetrahedrons, wherein a reflecting material as a material applied alyuminesoderzhaschih based alloys followed by filling them with air or titanium hydride having a density in the range of 0.5 ... 0.9 kg / m ³ with the following strength properties: compressive strength within 5 ... 10 MPa, the flexural strength in the range of 10 ... 20 MPa, such as foamed aluminum or sound insulating plate on the base glass staple fiber type "Shumostop" material with a density of 60 ÷ 80 kg / m ^3, or material based on magnesia Knitted uschego with reinforcing glass fiber or glass-fiber. 2. The method of sound insulation of equipment according to claim 1., characterized in that as a sound-absorbing material of the layer of the sound-absorbing element, a porous sound-absorbing ceramic material having a bulk density of 500 ÷ 1000 kg / m ³ and consisting of 100 mass parts of perlite with a particle diameter is used 0.5 ÷ 2.0 mm, 100 ÷ 200 mass parts of one or more sintering materials and 10 ÷ 20 mass parts of binder materials.