US 11,867,282 B1
Planetary gear box
Paul Gorenz, Berlin (DE); and Maximilian Prölss, Berlin (DE)
Assigned to ROLLS-ROYCE DEUTSCHLAND LTD & CO. KG, Blankenfelde-Mahlow (DE)
Filed by Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow (DE)
Filed on Aug. 18, 2022, as Appl. No. 17/890,692.
Claims priority of application No. 10 2021 122 300.8 (DE), filed on Aug. 27, 2021.
Int. Cl. F01D 15/12 (2006.01); F16H 57/04 (2010.01); F16H 57/08 (2006.01); F16H 1/28 (2006.01); F16C 17/02 (2006.01)
CPC F16H 57/0471 (2013.01) [F01D 15/12 (2013.01); F16C 17/02 (2013.01); F16H 1/28 (2013.01); F16H 57/043 (2013.01); F16H 57/08 (2013.01); F05D 2220/323 (2013.01); F16C 2361/65 (2013.01); F16H 2057/085 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A planetary gear box, comprising:
a sun gear which is rotatable about a rotation axis of the planetary gear box;
a plurality of planet gears, which are driven by the sun gear, wherein the planet gears each have a rotation axis;
a ring gear with which the plurality of planet gears are in engagement;
a plurality of plain bearing pins which each have a longitudinal axis and an external contact face, wherein one of the plain bearing pins is disposed in each of the planet gears;
an axially front carrier plate and an axially rear carrier plate, wherein the plain bearing pins at axial ends thereof are connected to the axially front carrier plate and the axially rear carrier plate;
wherein each plain bearing pin and planet gear combination configure a lubricated plain bearing which comprises a plain bearing gap, and
wherein the plain bearing pin, on the contact face thereof, forms a feed pocket which is provided and configured to receive oil and during operation, deliver oil in a circumferential direction to the plain bearing by way of a delivery edge,
wherein the feed pocket is configured in the contact face of the plain bearing pin such that the delivery edge has a profile that deviates from a straight profile parallel to the longitudinal axis of the plain bearing pin;
wherein the feed pocket is configured in the contact face of the plain bearing pin such that the delivery edge runs obliquely to the longitudinal axis of the plain bearing pin;
wherein the delivery edge runs obliquely to the longitudinal axis of the plain bearing pin such that the delivery edge in the presence of a relative torque, which in an observed operating state acts on the two carrier plates, runs at least approximately parallel to the rotation axis of the planet gear.