RU2466885C1 - Acoustic and vibration isolating device - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device includes a panel in the form of steel plates fixed on both sides on flexible material, and namely on metal mesh lined with fabric from basalt fibre on both sides and made of two and more panels fixed along the outlet and containing steel plates of various sizes and geometrical shape. Panels are located at the distance of 3 to 500 mm and at an angle of 0 to 45° relative to each other and connected to each other by means of adjustable inserts, and space between panels is filled with loose granulated acoustic and vibration insulating and/or fibrous material.

EFFECT: increasing acoustic and vibration insulating and sound absorbing efficiency of the device.

3 cl, 4 dwg

Description

The invention relates to devices for sound insulation in a wide range of frequencies and can be used in sea, river and land transport.

The soundproofing panel is known (patent 2368518 RU, IPC B60R 13/08, publ. 09/27/09, Bull. No. 27), made in the form of steel plates mounted on a metal mesh, and in the steel plates holes are made larger than passing through the hole lengthy products of various sections, on both sides of the plates in the center of the hole there are two split discs held by leaf springs fixed to steel plates.

A disadvantage of the known panel is the lack of soundproofing and sound absorption.

The closest in technical essence and the achieved technical result is a soundproof panel (patent 2340478 RU, IPC B60R 13/08, publ. 12.12.08, Bull. No. 34), made in the form of separate geometric shapes, for example square plates fixed on both sides on a flexible material, in particular on a metal mesh coated on both sides with a basalt fiber cloth.

A disadvantage of the known soundproofing panel is its low sound absorption capacity.

The technical result of the invention is to increase the sound-absorbing and sound-absorbing effectiveness of the device.

The technical result is achieved due to the fact that the device is soundproof, containing a panel in the form of steel plates fixed on both sides on a flexible material, in particular on a metal mesh coated on both sides with a basalt fiber fabric, characterized in that it is made of two or more steel plates fastened along the contour, containing steel plates of various sizes and geometrical shapes, while the panels are located relative to each other at a distance of 3 to 500 mm at an angle from 0 to 45 ° and are interconnected th adjustable inserts, and the space between the panels is filled with granular granular sound-absorbing and / or fibrous material.

The essence of the invention is illustrated by drawings:

figure 1 - General view of the device soundproof;

figure 2 - section aa - the location of the panels at an angle relative to each other and fastening non-adjustable adjustable insert panels between themselves;

figure 3 - remote element B - the location of the metal mesh and basalt fabric between the steel plates;

figure 4 - view In the location of the steel plates on the bottom panel.

The soundproofing device 1 (FIG. 1) comprises panels 2 and 3 (FIG. 2). Panel 2 is made of outer steel plates 4, 5, 6 and inner steel plates 7, 8, 9, and panel 3 is made of outer steel plates 10, 11 (FIG. 4) and inner steel plates 12, 13 (FIG. 2) having various sizes and geometric shapes. The plates are fixed on both sides to a metal mesh 14 (Fig. 3), a basalt fiber cloth 15 coated on both sides. The panels 2 and 3 are fastened to each other along the contour with adjustable inserts 16 (Fig. 2) made of elastic material, and bolts 17 on the lathing 18. The space between the panels 2 and 3 is filled with granular granular soundproofing and / or fibrous material 19. The panels 2 and 3 are located at an angle from 0 to 45 ° to each other (angle α in figure 2) at a distance of 3 to 500 mm (size H in FIG. 2).

The invention is carried out as follows.

Since in the absence of sound absorption, the energy of the sound field generated by repeated reflection of sound waves helps to reduce sound insulation, the corresponding steel plates of panels of various sizes and geometrical shapes are selected, as well as the distances between them so that the natural frequencies of the panels are different and there is no general resonance of the panels.

The multilayer combination of several panels creates an effective sound-reflecting and sound-absorbing structure.

Depending on the location of the panels and the distance from the source of sound vibrations, choose a distance between the panels from 3 to 500 mm.

The angle from 0 to 45 ° and the installation of control inserts between the panels should provide such an arrangement of the panels between themselves to exclude acoustic resonance of the air layer between the panels or resonant vibrations of the material filling the space between the panels.

Since the soundproofing panel mainly works on sound reflection, it was proposed for sound absorption to fill the air space between the panels with granular granular soundproofing and / or fibrous material that scatters and absorbs vibration and sound vibrations.

The use of the invention allows to increase the soundproofing efficiency of the device and improve the soundproofing of the entire vehicle.

Claims (3)

1. Soundproofing device comprising a panel in the form of steel plates fixed on both sides to a flexible material, in particular a metal mesh coated on both sides with a basalt fiber fabric, characterized in that it is made of two or more panels fastened along the contour, containing various the size and geometric shape of the steel plate, the panels are located relative to each other at a distance of 3 to 500 mm at an angle from 0 to 45 °, 2. The soundproofing device according to claim 1, characterized in that the panels are interconnected by adjustable inserts. 3. The soundproofing device according to claim 1, characterized in that the space between the panels is filled with granular granular soundproofing and / or fibrous material.

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