Scavenge filter system for a gas turbine engine
AssigneeUnited Technologies Corporation
InventorWilliam G. Sheridan
Life of this patent
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Abstract
A scavenge filter system according to an exemplary aspect of the present disclosure includes, among other things, a first scavenge pump stage positioned in a first flow path downstream of a first bearing compartment of a spool and a second scavenge pump stage positioned in a second flow path downstream of a second bearing compartment. The second bearing compartment houses a geared architecture mechanically coupled to the spool. A first scavenge filter fluidly couples the first scavenge pump stage to at least one oil reservoir. A second scavenge filter fluidly couples the second scavenge pump stage to the at least one oil reservoir. The first and second scavenge filters are separate and distinct. A method of filtering debris is also disclosed.
Claims23
A scavenge filter system comprising:
- a first scavenge pump stage positioned in a first flow path downstream of a first bearing compartment of a spool;
- a second scavenge pump stage positioned in a second flow path downstream of a second bearing compartment, the second bearing compartment housing a geared architecture mechanically coupled to the spool to drive a fan, the fan and the geared architecture each extending along an engine central longitudinal axis;
- a first scavenge filter fluidly coupling the first scavenge pump stage to at least one oil reservoir;
- and
- a second scavenge filter fluidly coupling the second scavenge pump stage to the at least one oil reservoir, the first and second scavenge filters being separate and distinct.
A gas turbine engine comprising:
- a fan section including a fan shaft coupled to a fan;
- a low speed spool and a high speed spool mounted for rotation within a plurality of spool bearing compartments, the low speed spool mechanically coupling the fan section and a compressor section to a turbine section;
- a geared architecture housed within a gear bearing compartment and mechanically coupling the fan to the low speed spool to drive the fan at a lower speed than the low speed spool, the fan and the geared architecture each extending along an engine central longitudinal axis;
- and
- a scavenge filter system including:
- a plurality of spool scavenge pump stages each positioned downstream and fluidly coupled to one of the spool bearing compartments,
- a gear scavenge pump stage positioned downstream and fluidly coupled to the gear bearing compartment;
- a spool scavenge filter fluidly coupling the spool scavenge pump stages to at least one oil reservoir;
- and
- a gear scavenge filter fluidly coupling the gear scavenge pump stage to the at least one oil reservoir, the spool and gear scavenge filters being separate and distinct.
A method of filtering debris comprising the steps of:
- providing at least one spool mounted for rotation within a spool bearing compartment and a gear bearing compartment housing a geared architecture mechanically coupled to the spool to drive a fan, the fan and the geared architecture each extending along an engine longitudinal axis;
- providing a spool scavenge pump stage fluidly coupled to the spool bearing compartment and a gear scavenge pump stage fluidly coupled to the gear bearing compartment;
- positioning a spool scavenge filter within a first flow path downstream of the spool scavenge pump stage;
- positioning a gear scavenge filter within a second flow path downstream of the gear scavenge pump stage, the spool and gear scavenge filters being separate and distinct;
- filtering fluid within the first flow path with the first scavenge filter;
- and
- filtering fluid within the second flow path with the second scavenge filter.
Dependencies are inferred from the claim text.