US 12,006,844 B2
Radial locking of a blade pivot with adjustable orientation for a turbomachine fan hub
Vincent François Georges Millier, Moissy-Cramayel (FR); and Olivier Belmonte, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/757,023
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Dec. 3, 2020, PCT No. PCT/FR2020/052257
§ 371(c)(1), (2) Date Jun. 8, 2022,
PCT Pub. No. WO2021/116566, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1914180 (FR), filed on Dec. 11, 2019.
Prior Publication US 2023/0013057 A1, Jan. 19, 2023
Int. Cl. F01D 7/00 (2006.01); F01D 25/16 (2006.01); F16B 21/18 (2006.01); F16C 19/06 (2006.01); F16C 35/063 (2006.01)
CPC F01D 7/00 (2013.01) [F01D 25/16 (2013.01); F16B 21/186 (2013.01); F16C 19/06 (2013.01); F16C 35/063 (2013.01); F05D 2260/30 (2013.01); F05D 2260/70 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A blade pivot with adjustable orientation for a turbomachine fan hub, comprising:
a stud extending along a radial axis (Z-Z) and having, at an external radial end, means for retaining a fan blade root and, at an internal radial end, coupling means for transmitting a torsional torque;
a rolling bearing for absorbing centrifugal forces having an inner bushing mounted in transverse abutment against an external radial portion of the stud;
a ring for radially retaining the stud relative to the rolling bearing housed in an annular groove formed in the stud;
a plurality of clamping parts each mounted in transverse abutment, along a direction orthogonal to the radial axis (Z-Z), against the retaining ring and in radial abutment, along the radial axis (Z-Z), against the inner bushing of the rolling bearing; and
a clamping nut screwed onto an outer thread of the stud to come into conical abutment against the plurality of clamping parts such that the plurality of clamping parts ensure a clamping of the inner bushing of the rolling bearing on the stud and a clamping of the retaining ring in the groove.