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

FIELD: instrument engineering.

SUBSTANCE: invention relates to noise suppression. Silencer contains a body consisting of a cylindrical shell rigidly connected to the end round plates, respectively with inlet and outlet nozzles, in the body, perpendicular to aerodynamic flow direction, there are at least three reactive chambers formed by round discs with holes. Holes in discs are alternatively shifted relative to housing axis so that holes in two adjacent discs do not coincide. Three series-connected jet chambers are connected with the body inlet branch pipe, as well as with combined chamber and outlet branch pipe. Combined chamber is formed by circular perforated disc and round end plate, which are connected to each other by means of central bushing, inner surface of which is lined with a sound-absorbing material and is coaxial with a cylindrical shell, wherein one of discs facing inlet branch pipe is lined with sound-absorbing round elements also mounted on discs with holes forming the reactive chambers. Body is made of structural materials with applied onto its surfaces on one or two sides a layer of a soft vibration dampening material. Porous noise-absorbing material is used as the sound-absorbing material.

EFFECT: technical result is increase on efficiency of noise suppression.

1 cl, 3 dwg