RU1811633C - Sound-insulating device - Google Patents

Abstract

Usage: soundproofing noise sources. SUMMARY OF THE INVENTION: A soundproofing device comprises a hood made of mutually intersecting strips of elastically deformable material, forming equal-sized cells in which soundproofing mats are placed. The ceiling and side walls of the hood are interconnected by means of flat curved springs, which are installed at the respective ends of the mutually intersecting strips and are directed by the bulges inside the hood. Soundproof mats are fixed around the perimeter of the cells and between each other through textile fasteners such as burdock. 1 s.p. f-ly, 3 ill.

Description

ate

WITH

The invention relates to mechanical engineering, in particular to sound insulation of noise sources.

The purpose of the invention is to increase reliability under the influence of shock loads,

Fig. 1 shows a vibration damping device; figure 2 is a view along arrow a in figure 1; Fig. 3 shows a unit for joining side strips with a ceiling.

The vibration-isolating device comprises a hood 1 assembled from soft sound-absorbing mats 2 mounted on a frame 3, the side and ceiling ceilings of which are made in the form of intersecting strips 4, 5 of elastically deformable material, for example, steel strips of spring steel with a thickness of 0.5., .1 mm.

Vertical stripes 4 in the lower part are rigidly connected to a light, strong base 6, for example, from a welded plate made of aluminum alloy. The ends of the strips that make up the individual ceilings are installed relative to each other with a gap of ... 30 mm and are connected to each other using an angular spring 7, in the form of a curved strip with a bulge directed inside the hood. Soundproof mats are connected to the strips by means of textile fasteners such as burdock, the buttonhole part 8 of which is glued to the strips 4,5, and the hook part 9 to the mats 2. The edges of the horizontal and vertical mats 2 are connected in the same way. Inside the hood

I placed rubber limiters 10, mounted directly on a soundproofed object

II (or on special hard bases). The base 6 with the help of vibration isolators 12 is attached to the foundation 13 soundproofed00

SE CA) WITH

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Object 11, which can also be mounted on vibration isolators.

For ease of access to the soundproofed object 11, cut-out mats are provided in the sound-absorbing mats, which are closed with special inserts 14 made of the same sound-absorbing mats and connected to the main mats using textile fasteners such as burrs.

Sound insulation device operates as follows.

The noise arising from the operation of the soundproofed object 11 is damped by a hood assembled from soft sound-absorbing mats 2. The stability of the static shape of the hood is ensured regardless of its size due to the presence of intersecting strips of 4.5, some of which are rigidly connected to a solid base 6, Under the influence of short-term loads, impact - on a wave, base crack, etc. the hood begins to deform together with strips 4, 5 and soft soundproof mats 2 attached to them. Obviously, the load-bearing floor will have a slight deformation, while the gaps between the side and horizontal floors and the flexible angular springs 7 do not constrain freedom their deformation and eliminate the dangerous stresses that could occur at the places of direct connection of the strips, which increases the reliability of the soundproofing device. After the external load ceases, the elastic forces in the strips restore the original shape of the hood. Under the action of shock forces, together with slowly changing forces (for example, forces arising from a roll or differentiation of the foundation 13), the walls of the hood in the region of the location of the strips 4 are in contact with the rubberized limiters of displacement 10. The gap between the limiters and the strips is calculated from the condition that when they are closed, the elastic limit of the strips is not exhausted, as a result of which, after the termination of the forces, the initial shape of the hood is restored. Under the action of large external dynamic loads, the flexible design of the vibration isolating device is easy and does not create large inertial loads capable of destroying the vibration isolating object 11. In extreme cases, unfastening of textile fasteners is possible. This ensures high reliability of the device as a whole, while maintaining the convenience of servicing the soundproofing object 11, since it is easy to reach any point by unfastening fasteners such as burdocks at the edges of inserts 14 or sound-absorbing mats.

The proposed design has a social effect, as it protects maintenance personnel from the harmful effects of noise.

Claims (2)

1. A soundproofing device comprising a frame made of mutually intersecting strips forming equal-sized cells, in which soundproof mats are placed, fixed around the perimeter of the cells, characterized in that, in order to increase reliability under the influence of shock loads, from mutually intersecting strips made of elastically deformable material, a hood is formed, the ceiling and side walls of which are interconnected by means of introduced flat curved springs installed at the respective ends of the asymmetrically intersecting strips and directed by bulges into the hood. 2. The device pop. 1, characterized in that, in order to improve ease of use, soundproof mats are fixed around the perimeter and with each other by means of textile fasteners such as burdocks.