INDUSTRIAL VACUUM CLEANER NOISE SILENCER Russian patent published in 2018 - IPC F01N1/00 

FIELD: acoustics.

SUBSTANCE: invention refers to noise suppression. Silencer contains a body consisting of a cylindrical shell rigidly connected to end round plates having inlet and outlet branch pipes, herewith in the body, perpendicular to the aerodynamic flow direction, there are at least three jet chambers formed by round discs with holes, wherein the holes in the discs are alternately displaced relative to the axis of the body in such a way, that the holes in two adjacent discs do not coincide, while three connected in series jet chambers are connected to the inlet branch pipe of the body, a combined and a sound-absorbing chambers are placed in the body, 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 inner surfaces of the sound absorptive chamber are lined with a sound-absorbing annular element installed coaxially to the cylindrical body, and the round plate with the outlet branch pipe and the disc with a central hole are lined with the sound-absorbing annular element, the body is made from structural materials with a layer of a soft vibro-damping material applied onto its surface from one or two sides, for example, VD-17 mastic, or a material of the Gerlen-D type.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg