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

FIELD: acoustics.

SUBSTANCE: invention relates to the noise suppression equipment. Silencer contains a body consisting of a cylindrical shell rigidly connected to end round plates having inlet and outlet branch pipes, at the same time in the body, perpendicular to the direction of movement of the aerodynamic flow, at least three reactive chambers, formed by round discs with holes, are arranged, 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, at the same time, three successively connected reactive chambers are connected to the inlet pipe of the body, and also through the central opening of the sound-absorbing chamber to the outlet pipe, moreover, the sound-absorbing chamber is formed by a cylindrical shell, an end round plate with an outlet nozzle and a disk with a central hole coaxial with the body, and the inner surfaces of the sound-absorbing chamber are lined with a sound-absorbing annular element mounted coaxially to the cylindrical body, and the round plate with an outlet and the disk with a central hole are lined with a sound-absorbing circular element. Said body is made of structural materials, with a layer of soft vibration-damping material deposited on its surface on one or both sides. In the reactive chambers, sound-absorbing ring elements are installed coaxially to the cylindrical body.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg