Planetary gear and gas turbine engine

Patent metadata

Field	Value
Publication number	US-11248695-B2
Application number	US-201916431267-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Jun 8, 2018
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A planetary gearbox includes a planet carrier, with a planetary gear rotatably disposed on the planet carrier, and a gear that meshes with the planetary gear, as well as a gas turbine engine having such a planetary gearbox. The planet carrier has an oil supply installation including a supply line for oil to an opening. The oil is directed out of the opening in the direction of the planetary gear and/or the gear. The oil supply installation in relation to a primary rotating direction of the planetary gear and/or the gear in front of the opening includes a shielding region which protrudes from an external side of the oil supply installation and which by way of the external side of the oil supply installation on a side that faces the primary rotating direction of the planetary gear and/or the gear, delimits an oil collection groove.

First claim

The invention claimed is:

1. A planetary gearbox comprising:
a planet carrier, including a planetary gear that is disposed so as to be rotatable on the planet carrier,
at least one further gear that meshes with the planetary gear,
wherein the planet carrier includes an oil supply installation which comprises a supply line for oil and at least one opening connected to the supply line and configured to direct oil from the supply line in a direction of the planetary gear and/or the at least one further gear, for cooling and/or lubricating; and
wherein the oil supply installation further comprises at least one shielding region which protrudes from an external side of the oil supply installation and which is positioned in front of the opening in relation to a primary rotating direction of the planetary gear and/or the at least one further gear and which forms an oil collection groove on the external side of the oil supply installation that faces the primary rotating direction of the planetary gear and/or the at least one further gear;
wherein the oil collection groove has a consistent depth between a free end of the shielding region and a base of the oil collection groove, wherein the consistent depth is in an axial direction of the planet carrier, between two end regions of the oil collection groove.

2. The planetary gearbox according to claim 1 , wherein the at least one shielding region includes two shielding regions that are mutually spaced apart in the axial direction of the planet carrier, the two shielding regions each forming one oil collection groove.

3. The planetary gearbox according to claim 1 , wherein an outflow direction of oil from the opening is directed to be at least approximately radial onto the planetary gear or the at least one further gear, and the opening and a profile of the shielding region, proceeding from the external side of the oil supply installation in a direction of a free end of the shielding region, are mutually configured such that the outflow direction of oil and the profile of the shielding region run to be at least approximately mutually parallel, and enclose an acute angle or an obtuse angle.

4. The planetary gearbox according to claim 1 , wherein an outflow direction of oil from the opening is directed to be at least approximately tangential onto the planetary gear or the at least one further gear, and the opening and a profile of the shielding region, proceeding from the external side of the oil supply installation in a direction of a free end of the shielding region, are mutually configured such that the outflow direction and the profile of the shielding region enclose an acute angle or an obtuse angle.

5. The planetary gearbox according to claim 1 , wherein a plurality of the oil supply installations are positioned in a circumferential region of the planetary gear and/or the at least one further gear.

6. The planetary gearbox according to claim 1 , wherein the shielding region in an area of the oil collection groove includes a porous material that absorbs oil.

7. The planetary gearbox according to claim 1 , wherein the planet carrier is configured to be rotatable, and the shielding region protrudes in relation to the external side of the oil supply installation such that a centrifugal force acting on oil accumulated in the oil collection groove directs oil toward the base of the oil collection groove.

8. The planetary gearbox according to claim 1 , wherein the at least one further gear is embodied as a ring gear, as a sun gear, and/or as a further planetary gear that meshes with the planetary gear.

9. A gas turbine engine for an aircraft, the gas turbine engine comprising:
an engine core which comprises a turbine, a compressor, and a core shaft that connects the turbine to the compressor;
a fan which is positioned upstream of the engine core, wherein the fan comprises a plurality of fan blades; and
the planetary gearbox according to claim 1 , which receives an input from the core shaft and delivers a drive output to the fan for driving the fan at a lower rotating speed than the core shaft.

10. The gas turbine engine according to claim 9 , wherein the turbine is a first turbine, the compressor is a first compressor, and the core shaft is a first core shaft;
the engine core further comprises a second turbine, a second compressor, and a second core shaft which connects the second turbine to the second compressor; and
the second turbine, the second compressor, and the second core shaft are configured to rotate at a higher rotating speed than the first core shaft.

11. A planetary gearbox comprising:
a planet carrier, including a planetary gear that is disposed so as to be rotatable on the planet carrier,
at least one further gear that meshes with the planetary gear,
wherein the planet carrier includes an oil supply installation which comprises a supply line for oil and at least one opening connected to the supply line and configured to direct oil from the supply line in a direction of the planetary gear and/or the at least one further gear, for cooling and/or lubricating; and
wherein the oil supply installation further comprises at least one shielding region which protrudes from an external side of the oil supply installation and which is positioned in front of the opening in relation to a primary rotating direction of the planetary gear and/or the at least one further gear and which forms an oil collection groove on the external side of the oil supply installation that faces the primary rotating direction of the planetary gear and/or the at least one further gear;
wherein the at least one shielding region includes two shielding regions that are mutually spaced apart in an axial direction of the planet carrier, the two shielding regions each forming one oil collection groove.

12. The planetary gearbox according to claim 11 , wherein the at least one further gear is embodied as a ring gear, as a sun gear, and/or as a further planetary gear that meshes with the planetary gear.

13. A gas turbine engine for an aircraft, the gas turbine engine comprising:
an engine core which comprises a turbine, a compressor, and a core shaft that connects the turbine to the compressor;
a fan which is positioned upstream of the engine core, wherein the fan comprises a plurality of fan blades; and
the planetary gearbox according to claim 11 , which receives an input from the core shaft and delivers a drive output to the fan for driving the fan at a lower rotating speed than the core shaft.

14. The gas turbine engine according to claim 13 , wherein the turbine is a first turbine, the compressor is a first compressor, and the core shaft is a first core shaft;
the engine core further comprises a second turbine, a second compressor, and a second core shaft which connects the second turbine to the second compressor; and
the second turbine, the second compressor, and the second core shaft are configured to rotate at a higher rotating speed than the first core shaft.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Meyer Franz
• Klostermann Jens

Classifications

• F05D2260/40311

  of the epicyclical, planetary or differential type · CPC title

• F02K3/06 Primary

  with front fan · CPC title

• F16H57/046

  Oil-mist or spray lubrication · CPC title

• F16H1/28

  with gears having orbital motion · CPC title

• F02C3/107

  with two or more rotors connected by power transmission · CPC title