MODE OF MANUFACTURING OF SOUND ABSORBING ARRANGEMENT OF TURBOJET ENGINE Russian patent published in 2008 - IPC F02C7/24 

FIELD: invention refers to field of manufacturing of aircraft engines namely to arrangements for sound absorption in turbojet engines.

SUBSTANCE: mode of manufacturing of sound absorbing arrangement of turbojet engine includes fabrication of sound absorbing filler and its following connection with tract and external shells. Sound absorbing filler is fulfilled in the shape of coaxially located, isolated one from another profiles, for example, in form of quadrangle. Sound absorbing material is made of separate sections. Inner surface of each of them is identical to external surface of tract shell. Profiles of sound absorbing filler are received by winding tape out of compositional material on mould making, elastically deforming, for example, rubber, elements. They polymerize received sections, extract mould making elements from them after that on mould forming chuck they wind tract shell with tapes or threads of compositional material. Then they put sections with filler on shell along circumference filler with adjoining them to each other, wind on them external shell analogously as on tract shell. They polymerize received packet, remove it from mandrel and make perforation in tract shell and in walls of profiles inverted to it.

EFFECT: reduces manufacturability of sound absorbing arrangement and its weight.

5 dwg