Geared architecture gas turbine engine with planetary gear oil scavenge
AssigneeRaytheon Technologies Corporation
InventorsJanice Jabido, Michael E. McCune
Life of this patent
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Abstract
A fan drive gear system for a turbofan engine according to an exemplary embodiment of this disclosure, among other possible things includes a sun gear that is rotatable about an axis, a plurality of intermediate gears driven by the sun gear, and a baffle that is disposed between at least two of the plurality of intermediate gears for defining a lubricant flow path from an interface between the sun gear and at least one of the plurality of intermediate gears. The baffle includes a channel with at least one ramp portion directing lubricant.
Claims12
A fan drive gear system for a turbofan engine comprising:
- a sun gear rotatable about an axis;
- a plurality of intermediate gears driven by the sun gear;
- and
- a baffle disposed between at least two of the plurality of intermediate gears for defining a lubricant flow path from an interface between the sun gear and at least one of the plurality of intermediate gears, the baffle including a channel with a first ramp portion and a second ramp portion configured for directing lubricant and a flow splitter disposed within the channel for splitting lubricant between the first ramp portion and the second ramp portion, wherein the flow splitter is spaced apart from a midway point of an axial width of the channel such that incoming lubricant flow is unequally distributed forward and aft of the baffle.
A turbofan engine comprising:
- a fan section rotatable about an axis;
- a core engine section disposed about the axis;
- a primary lubrication system including a sump for gathering lubricant;
- an auxiliary lubrication system configured to supply a lubricant flow in an absence of a lubricant flow from the primary lubricant system;
- a fan drive gear system driven by the core engine section for rotating fan of the fan section about the axis, the fan drive gear system including:
- a sun gear rotatable about the axis, the sun gear including a circumferential cavity disposed between a first gear region and a second gear region;
- a plurality of intermediate gears driven by the sun gear;
- a baffle disposed between at least two of the plurality of intermediate gears for defining a lubricant flow path from an interface between the sun gear and at least one of the plurality of intermediate gears, the baffle including a channel with a first ramp portion directing lubricant to the auxiliary lubrication system, a second ramp portion directing lubricant toward the sump and a flow splitter disposed within the channel for splitting lubricant between the first ramp portion and the second ramp portion, wherein the flow splitter is spaced apart from a midway point of an axial width of the channel such that incoming lubricant flow is unequally distributed between the auxiliary lubrication system and the sump.
Dependencies are inferred from the claim text.