ACTIVE NOISE SUPPRESSOR OF INDUSTRIAL VACUUM CLEANER Russian patent published in 2016 - IPC A47L5/00 F01N1/04 

FIELD: acoustics.

SUBSTANCE: invention relates to noise suppression. This is achieved by fact, that in noise suppressor comprising housing consisting of cylindrical shell, rigidly connected by end round plates with inlet and outlet branch pipes, wherein in housing perpendicular to aerodynamic flow direction jet chambers are arranged, formed by round discs with holes, wherein jet chambers are connected with inlet branch pipe, to one of end round plates axially symmetrical to housing silencer resonance insert and outlet branch pipe are attached, and to other axially symmetrical to housing silencer reactive part with inlet branch pipe is attached, wherein silencer reactive part is installed perpendicular to aerodynamic flow direction and consists of, at least, three reactive chambers, formed by round discs with openings, coaxial to housing and inlet branch pipe, and silencer resonance insert is made in form of cylindrical sleeve, attached to end round plate coaxially to housing, and consists of sound-absorbing chamber and resonance chamber, formed by rigid partitions, wherein in resonance chamber are located, at least two resonance inserts secured on sleeve, perpendicular to its axis, sound-absorbing chamber is formed by end round plate with discharge branch pipe, rigid partition and part of resonance insert cylindrical sleeve, which is lined with sound absorbing material, wherein in sound-absorbing chamber are located, at least, three exhaust bushings, fixed on sleeve, perpendicular to its axis.

EFFECT: technical result is higher efficiency of noise suppression.

5 cl, 3 dwg