US 11,808,344 B2
Planet carrier for a mechanical gearbox of an aircraft turbomachine
Guillaume Pierre Mouly, Moissy-Cramayel (FR); Frederic Nicolas François Laisnez, Cergy (FR); and Adrien Louis Simon, Saint-Denis (FR)
Assigned to SAFRAN TRANSMISSION SYSTEMS, Colombes (FR)
Filed by SAFRAN TRANSMISSION SYSTEMS, Colombes (FR)
Filed on Jan. 4, 2022, as Appl. No. 17/568,093.
Claims priority of application No. 2100060 (FR), filed on Jan. 5, 2021.
Prior Publication US 2022/0213956 A1, Jul. 7, 2022
Int. Cl. F16H 57/04 (2010.01); F02C 7/36 (2006.01); F16H 57/08 (2006.01)
CPC F16H 57/046 (2013.01) [F02C 7/36 (2013.01); F16H 57/0479 (2013.01); F16H 57/0486 (2013.01); F16H 57/082 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A planet carrier for a mechanical gearbox for a turbomachine, the planet carrier comprising:
a one-piece cage that extends about an axis of rotation defining an internal housing configured to receive a sun gear and planet gears of the gearbox, and
a lubrication system comprising:
a bore formed in the cage and extending parallel to the axis over more than 30% of a maximum axial dimension of the cage, and
two sprinklers fitted on the cage, each sprinkler being mounted in a recess of the cage and comprising:
an oil spray orifice, and
an internal passage for fluidly communicating said orifice with said bore,
wherein a first of the two sprinklers comprises a longitudinal sprinkler which extends in a direction parallel to the axis and is mounted in a recess which is directly connected to a longitudinal end of the bore.