INDUSTRIAL VACUUM CLEANER MULTI-CHAMBER SOUND SUPPRESSOR Russian patent published in 2018 - IPC G10K11/162 G10K11/168 F01N13/02 F01N13/16 F01N1/24 F01N1/08 A47L9/00 

FIELD: acoustics.

SUBSTANCE: invention relates to noise suppression. Technical result is achieved by the fact, that in the multi-chamber noise silencer containing housing consisting of cylindrical shell rigidly connected to end round plates with inlet and outlet branch pipes, at that, in the housing, perpendicular to the aerodynamic flow movement direction, at least three reactive chambers are located, formed by circular disks with holes, wherein the openings in the discs are alternately displaced relative to the body axis in such a way, that the openings in two adjacent discs do not coincide, wherein three in-series connected reactive chambers are connected to housing inlet branch pipe, in the housing the reactive chamber is arranged, which is located between combined chamber and sound-absorbing chamber, adjacent to the outlet branch pipe and end round plate, wherein the combined chamber is formed by the discs connected to each other by means of a central bushing coaxial with the cylindrical shell and with the inner surface lined with a sound-absorbing material, while one of the discs facing the inlet branch pipe is made perforated and lined with a sound-absorbing circular element that are also installed on the discs with holes forming the jet chambers, and the sound-absorbing chamber is formed by the cylindrical shell, the end round plate with the outlet branch pipe and the disc with a central hole coaxial with the central bushing of the combined chamber, wherein the sound absorptive chamber inner surfaces are lined with sound-absorbing annular element installed coaxially to the cylindrical housing, and round plate with discharge branch pipe and disc with central bore are lined with sound absorbing round element, housing is made of structural materials with applied on its surface from one or two sides soft vibration dampening material layer, for example, VD-17 mastic, or “Gerlen-D” type material.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg