SU1609487A1 - Soundproof coating for noise-producing machine drum - Google Patents

Abstract

The invention relates to noise levels of noise-emitting machines such as drum mills and can be used in the energy, construction and other industries. The purpose of the invention is to reduce noise levels and increase safety at work. For this, the device has a fixed elastically on the drum, over each of the lattice hatches 2, a protective casing with a soundproofing discharge cavity 16 and a silencer 12. 1. f-ly, 5 ill.

Description

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1609487

The invention relates to reducing noise levels of noise-emitting machines such as drum mills, tumbling and sorting drums, and the like. and can be used in the energy, construction, mining and engineering industries. The object of the invention is to reduce the noise level 12 by the sound absorber 14 during their forward and backward movement, after reflection from the element 13, movement, i.e. In the device, there is a sequential multiple interaction of sound waves with sound-reflecting and sound-absorbing elements of the protective casing and, therefore, the effect of f 1, -scaped. EGOSHEK -

but zt. ™ .1 when the machine is working .. structural sound vibrations on the tip of figure 1 shows the coating with burakly rigid element 13 of the casing

provided by effectively quenching them in elastic ties 17. 15 and rubber suspension 20, elastically fixing the casing on the drum. Elimination of scatter and giving neob-. The directional movement of the balls to the balls during their unloading through the wire hatch and transporting them into the bunker is carried out by means of the same protective casing, or rather, by means of its rubber-metal base 7-11.

In the event that the ball is communicated when it leaves the slot of the lattice 2 into the cavity 16 of a relatively large kinetic energy (under the action of centrifugal force), it moves radially, 30

20

ban, general view; figure 2 is the same, the section aa in figure 1; fig.Z - node I in figure 2; figure 4 - section bb in fig.Z, - figure 5 - section bb in fig.Z.

The coating includes placed on the ribbed part of the drum 1, equipped with lattice hatches 2, sound insulating lining 3,4,5, as well as cushion covers 6. Each of the casing; the casing contains rubber metal base 7, including an elastic support a rack with side 8 and end-9 9 walls interconnected through a rigid metal frame 10 with an elastic radial perforated screen 11, as well as a noise muffler 12 containing a hard convex element 13 filled with a sound absorber 14 and interconnected through the perforated screen with the base. In the casing, from the side of the open end, is placed soundproofing. a valve 15 attached by one of the edges fixedly to the drum and sealing (closing) the sound-insulating unloading cavity 16 formed above the hatch 16. Protective cover by protruding from it from the side closed by the base

the end of the elastic link 17 of the elastic perforated screen, the rigid plate 18 and the bolts 49 is fixed along its width to

Drum. In addition, the casing is elastically fixed on the drum with the help of lateral rubber spring hangers 20 ,. interconnecting the drum with a rigid frame of the casing base.

The device works as follows.

The intense sound waves emitted from the drum 1 pass through the lattice hatch 2 into the closed cavity 16 of the protective cover 6 and are reflected there from the surfaces bounding it. A considerable part of the sound waves penetrates through the acoustically transparent perforated screen 11 and quenches into

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f

pushes onto the elastic screen 1, on which his kinetic energy is extinguished, after which he begins to move along the radial surface of screen 11 towards valve 15. Overcoming the elasticity of valve 15 at the exit of cavity 16, the ball goes down into the bunker, the valve closes automatically .

Thus, the invention provides improved safety as well as effective sound insulation, which allows reducing noise levels and improving working conditions in the workplace.

Claims (1)

1. The soundproofing coating of the drum of the noise-emitting machine, including lattice hatches placed on its ribbed part and sound-absorbing lining, characterized in that, in order to reduce noise levels and increase safety of the machine, each lattice hatches are fitted with a protective elastically attached to the drum a casing containing a rubber base; a plastic base with a U-shaped support resting around the hatch on the drum; an elastic support column interconnected through a rigid frame the silencer 12 by the sound absorber 14 when they are direct and reverse, after being reflected from element 13, is moving, i.e. In the device, there is a sequential multiple interaction of sound waves with sound-reflecting and sound-absorbing elements of the protective casing and, therefore, the effect of f 1, -scaped. EGOSHEK -  If the ball is communicated when it leaves the slot of the lattice 2 into the cavity 16 of a relatively large kinetic energy (under the action of centrifugal force), it moves radially, 30 25 35 40 45 50 five f pushes onto the elastic screen 1, on which his kinetic energy is extinguished, after which he begins to move along the radial surface of screen 11 towards valve 15. Overcoming the elasticity of valve 15 at the exit of cavity 16, the ball goes down into the bunker, the valve closes automatically . Thus, the invention provides improved safety as well as effective sound insulation, which allows reducing noise levels and improving working conditions in the workplace. Invention Formula 1. The soundproofing coating of the drum of the noise-emitting machine, including lattice hatches placed on its ribbed part and sound-absorbing lining, characterized in that, in order to reduce noise levels and increase safety of the machine, each lattice hatches are fitted with a protective elastically attached to the drum a casing containing a rubber base; a plastic base with a U-shaped support resting around the hatch on the drum; an elastic support column interconnected through a rigid frame ten 5 G , ; / J 5- B turned 13 1 / I Fy V-V rotated FIG. five 20 2nd