US 12,297,773 B2
Removable mechanical part for acoustic insulation of an air inlet casing
Laurent Stéphane Tardy, Moissy Cramayel (FR); and Jaime Georges Paul Culla, Moissy Cramayel (FR)
Assigned to SAFRAN POWER UNITS, Toulouse (FR)
Appl. No. 18/565,281
Filed by SAFRAN POWER UNITS, Toulouse (FR)
PCT Filed Jun. 30, 2022, PCT No. PCT/FR2022/051308
§ 371(c)(1), (2) Date Nov. 29, 2023,
PCT Pub. No. WO2023/275499, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. FR2107133 (FR), filed on Jul. 1, 2021.
Prior Publication US 2024/0200493 A1, Jun. 20, 2024
Int. Cl. F02C 7/045 (2006.01); F02C 3/09 (2006.01); B64D 33/02 (2006.01)
CPC F02C 7/045 (2013.01) [F02C 3/09 (2013.01); B64D 2033/0206 (2013.01); B64D 2033/0213 (2013.01); F05D 2220/50 (2013.01); F05D 2260/96 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An acoustic insulation assembly for an auxiliary power unit having a centrifugal compressor, the acoustic insulation assembly comprising:
a ring-shaped casing for an air inlet including a plurality of reinforcing arms connecting inner walls of the ring-shaped casing, wherein the air inlet is an air inlet of the centrifugal compressor,
the acoustic insulation assembly comprising:
a plurality of mechanical acoustic insulation parts, each mechanical part being ring-shaped and comprising attachment means to engage with the casing such that the mechanical part and a flow surface of the casing, defined by a pair of reinforcing arms of the plurality of reinforcing arms, overlie one another.