INDUSTRIAL VACUUM CLEANER ACTIVE NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/04 

FIELD: acoustics.

SUBSTANCE: invention relates to 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 that, in the housing, perpendicular to the aerodynamic flow movement direction, reactive chambers are located, formed by circular disks with holes, wherein reactive chambers are connected to the inlet branch pipe, to one of end round plates axially symmetrical to the 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, at that, the silencer reactive part is installed perpendicular to the aerodynamic flow direction and consists of at least three reactive chambers, formed by circular disks with holes coaxial with the housing and the inlet branch pipe, and the silencer resonance insert is made in form of cylindrical sleeve, coaxially attached to the housing to the end-face round plate, and consists of formed by the rigid partitions sound-absorbing chamber and resonance chamber, at that, in the resonant chamber at least two resonant inserts are located, fixed on the sleeve perpendicular to its axis, sound-absorbing chamber is formed by the end round plate with discharge branch pipe, rigid partition and part of resonance insert cylindrical sleeve, which is lined with sound absorbing material, and in the sound-absorbing chamber at least three fixed to the sleeve perpendicular to its axis exhaust bushings are located.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg