COMBINED KOCHETOV NOISE SUPPRESSOR Russian patent published in 2016 - IPC F01N1/04 

FIELD: manufacturing technology.

SUBSTANCE: silencer is intended for silencing car or engine exhausts. Silencer comprises a housing with end walls, inlet and outlet pipes and sound-insulated element made in form of sound absorbing material-filled chambers formed by coaxially installed perforated inserts with partitions and housing inner surface, in middle part of sound-absorbing element along its perimeter there is a tank open on side of air duct and formed by housing inner surface and end surfaces of inserts, one of chambers comprises a partition movable in axial direction, said partition being shaped as cross section of chamber, and movable partition is rigidly connected with at least two guide plates arranged on both sides of diagonal of cross section interacting with grooves made in end surface of insert, wherein to movable partition perpendicular to it and along entire perimeter is attached a guide apron interacting with inner surface of insert.

EFFECT: higher efficiency of noise suppression.

1 cl, 3 dwg