ASSEMBLY COMPRISING A LUBRICATING WHEEL AND LUBRICANT NOZZLES FOR A PLANETARY GEAR SPEED REDUCER OF A TURBOMACHINE

• US 20200132186A1
• Filed: 07/16/2018
• Published: 04/30/2020
• Est. Priority Date: 07/20/2017
• Status: Active Grant

• Current Assignee: Safran Transmission Systems
• Original Assignee: Safran Transmission Systems
• Inventors: Dombek, Alexis Claude Michel, Di Giovanni, Jean-Charles Michel Pierre
• Granted Patent: US 11,112,001 B2
• Time in Patent Office: Days
• CPC Class Codes: F01D 25/18 Lubricating arrangements of machines or engines in general F01M
• CPC Class Codes: F02C 7/36 Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user F02C3/107 - F02C3/13 and F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H
• CPC Class Codes: F05D 2220/323 for aircraft propulsion, e.g. jet engines
• CPC Class Codes: F05D 2250/11 triangular
• CPC Class Codes: F05D 2250/12 rectangular
• CPC Class Codes: F05D 2250/13 trapezoidal
• CPC Class Codes: F05D 2260/40311 of the epicyclical, planetary or differential type
• CPC Class Codes: F05D 2260/98 Lubrication
• CPC Class Codes: F16H 57/023 Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
• CPC Class Codes: F16H 57/0409 characterised by the problem to increase efficiency, e.g. by reducing splash losses
• CPC Class Codes: F16H 57/0431 Means for guiding lubricant directly onto a tooth surface or to foot areas of a gear, e.g. by holes or grooves in a tooth flank
• CPC Class Codes: F16H 57/0456 Lubrication by injection; Injection nozzles or tubes therefor oil mist or spray lubrication F16H57/0458
• CPC Class Codes: F16H 57/0457 Splash lubrication characterised by the problem reducing losses, e.g. splash losses F16H57/0409
• CPC Class Codes: F16H 57/0479 Gears or bearings on planet carriers
• CPC Class Codes: F16H 57/0482 Gearings with gears having orbital motion
• CPC Class Codes: F16H 57/0486 with fixed gear ratio differentials F16H57/0483
• CPC Class Codes: F16H 57/082 Planet carriers

Abstract

An assembly comprising a lubricating wheel and lubricant nozzles for a planetary gear speed reducer of a turbomachine, the wheel having a lubricator configured to supply lubricant to the nozzles and the bearings of the planetary carriers of the reducer, the wheel being intended to be mounted coaxially on an annular wall of an axis of rotation X of a planetary carrier of the reducer, the wheel having a bearing and attachment surface on the annular wall of the planetary carrier, the lubricant nozzles being distributed around the axis and each having a generally elongated shape, the nozzles having first longitudinal ends for fluidly connecting to the lubricator of the wheel, wherein the first ends of the nozzles being configured to be attached to the wheel before mounting the wheel on the annular wall of the planetary carrier.

Claims

1. A planetary carrier for a planetary carrier speed reducer of a turbine engine, said planetary carrier comprising:

a cage defining an inner space for mounting a central sun gear of axis of rotation X and an annular row of planetary carriers arranged about the axis X and meshed with said sun gear, said sun gear comprising a first coupler to couple to a first shaft, said cage comprising two substantially parallel annular walls centered on said axis X and a cylindrical wall connecting said annular walls at the outer periphery thereof, a first of said annular walls being connected to a substantially cylindrical body comprising a second coupler to couple to a second shaft, and a second of said annular walls on which are mounted a lubrication wheel and lubricant nozzles, the wheel comprising lubrication means configured to bring lubricant to the nozzles and to the bearings of the planetary carriers of said reducer, said wheel being configured to be mounted coaxially on said second annular wall and comprising an attachment surface on said second annular wall, said lubricant nozzles being distributed about said axis and each having an elongate shape, said nozzles comprising first longitudinal ends fluidly connecting to said means for lubricating said wheel, wherein said first ends of said nozzles comprise means for attaching to said wheel, said nozzles being configured to be attached to said wheel before mounting the wheel on said second annular wall.

2. The planetary carrier according to claim 1, wherein said attachment means of each nozzle comprise a tab for attaching to said wheel, said tab extending in a plane substantially perpendicular to an axis of elongation of the nozzle and being applied and attached on said attachment surface of said wheel or a recess provided on this attachment surface.

3. The planetary carrier according to claim 1, wherein each nozzle comprises, opposite said first end, a second free end.

4. The planetary carrier according to claim 3, wherein each nozzle comprises an inner longitudinal cavity opening at said first end and closed at said second end.

5. The planetary carrier according to claim 2, wherein said second annular wall comprises a surface for receiving said attachment surface said receiving surface comprising a recess or counterbore for housing said tab of each nozzle, or a means for attaching said tab.

6. The planetary carrier according to claim 5, wherein said second wall comprises an annular row of orifices or notches for the passage of said nozzles during the mounting of the wheel equipped with nozzles on said second wall.

7. The planetary carrier according to claim 6, wherein said orifices or said notches have a triangular or trapezoidal shape.

8. The planetary carrier according to claim 1, wherein said nozzles are attached to the wheel by screws screwed in the tapped orifices of the wheel.

9. A method for assembling a planetary carrier according to claim 1, comprising:

attaching said nozzles to said wheel,

mounting the wheel equipped with nozzles on said second wall.

10. The method according to claim 9, wherein said wheel is mounted on said second wall by making said nozzles pass through notches of a triangular or trapezoidal shape.

11. The method according to claim 9, wherein said wheel is attached to said second wall by screws of which two are arranged on either side of each nozzle and are screwed in tapped holes of said second wall.