US 11,879,344 B2
Device for making a fan or compressor for the aeronautical industry
Claude Pendaries, Moissy-Cramayel (FR); and François Gauharou, Moissy-Cramayel (FR)
Assigned to SAFRAN VENTILATION SYSTEMS, Blagnac (FR)
Filed by SAFRAN VENTILATION SYSTEMS, Blagnac (FR)
Filed on May 10, 2022, as Appl. No. 17/741,142.
Claims priority of application No. 2104986 (FR), filed on May 11, 2021.
Prior Publication US 2022/0364479 A1, Nov. 17, 2022
Int. Cl. F01D 21/04 (2006.01); F01D 11/12 (2006.01); F04D 29/52 (2006.01)
CPC F01D 21/045 (2013.01) [F01D 11/125 (2013.01); F04D 29/526 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A fan machine, comprising:
an annular casing comprising a main axis (A) and defining an internal flow duct for a gas flow along the axis;
a bladed wheel mounted inside the annular casing and having an axis of rotation coincident with the axis (A) of the annular casing; and
a system configured to retain debris in an event of breakage of the bladed wheel, this system comprising a retaining annulus, the retaining annulus being mounted around the annular casing and comprising upstream and downstream annular edges,
the annular casing comprising two radially outwardly projecting annular bosses which are located respectively upstream and downstream of the bladed wheel,
wherein each of the two radially outwardly projecting annular bosses comprises an external cylindrical surface on top of which the upstream and downstream annular edges of the retaining annulus are respectively applied and attached in such a manner that the bosses, the retaining annulus and a portion of the annular casing parallel to the retaining annulus form a covered annular space,
wherein the upstream and downstream edges of the retaining annulus comprise orifices that are aligned with threaded holes of the two radially outwardly projecting annular bosses.
 
12. A fan machine, comprising:
an annular casing comprising a main axis (A) and defining an internal flow duct for a gas flow along this axis;
a bladed wheel mounted inside the annular casing and having an axis of rotation coincident with the axis (A) of the annular casing; and
a system configured to retain debris in an event of breakage of the bladed wheel, this system comprising a retaining annulus, the retaining annulus being mounted around the annular casing and comprising upstream and downstream annular edges,
the annular casing comprising two radially outwardly projecting annular bosses which are located respectively upstream and downstream of the bladed wheel,
wherein the upstream and downstream annular edges of the retaining annulus are applied and attached respectively to said two radially outwardly projecting annular bosses,
wherein the upstream and downstream edges of the retaining annulus comprise orifices that are aligned with threaded holes of the two radially outwardly projecting annular bosses,
wherein the two radially outwardly projecting annular bosses comprise opposite inner walls configured to channel the debris passing through the casing to the retaining annulus.