Methods and apparatus for supplying oil to bearing assemblies
First Claim
1. A method for lubricating a bearing assembly using a lubrication system, the bearing assembly supporting a first rotor shaft having an axis of symmetry, the lubrication system including a second rotor shaft mounted concentrically around the first rotor shaft and including an inner surface and an outer surface, the inner surface including a plurality of first grooves extending axially from at least one second groove, the second groove substantially perpendicular to the plurality of first grooves, the first grooves in flow communication with the bearing assembly, said method comprising the steps of:
- supplying oil to at least one second rotor shaft second groove, channeling the oil circumferentially along a portion of an inner circumference of the second rotor shaft;
channeling the oil from the second rotor shaft second groove through the plurality of second rotor shaft first grooves; and
channeling the oil from at least one second rotor shaft first groove to the bearing assembly through at least one opening that extends between the second rotor shaft inner and outer surfaces.
2 Assignments
0 Petitions
Accused Products
Abstract
A gas turbine engine includes a lubrication system that supplies oil through a plurality of circumferential grooves and radial grooves to a bearing assembly. The grooves extend within an inner surface of a first rotor shaft sized to fit in an interference fit around a main rotor shaft. The circumferential grooves are spaced circumferentially around the inner surface of the first rotor shaft and are substantially perpendicular to the radial grooves. The radial grooves are in flow communication with a plurality of scoops extending between an outer and inner surface of the first rotor shaft, and with the bearing assembly.
71 Citations
20 Claims
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1. A method for lubricating a bearing assembly using a lubrication system, the bearing assembly supporting a first rotor shaft having an axis of symmetry, the lubrication system including a second rotor shaft mounted concentrically around the first rotor shaft and including an inner surface and an outer surface, the inner surface including a plurality of first grooves extending axially from at least one second groove, the second groove substantially perpendicular to the plurality of first grooves, the first grooves in flow communication with the bearing assembly, said method comprising the steps of:
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supplying oil to at least one second rotor shaft second groove, channeling the oil circumferentially along a portion of an inner circumference of the second rotor shaft;
channeling the oil from the second rotor shaft second groove through the plurality of second rotor shaft first grooves; and
channeling the oil from at least one second rotor shaft first groove to the bearing assembly through at least one opening that extends between the second rotor shaft inner and outer surfaces. - View Dependent Claims (2, 3, 4, 5)
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- 6. A lubrication system for a gas turbine engine including a first rotor shaft and an axis of symmetry, said lubrication system comprising a second rotor shaft concentrically around said first rotor shaft, said second rotor shaft comprising an inner surface and an outer surface, said inner surface comprising a plurality of first grooves and at least one second groove, said plurality of first grooves in flow communication with and extending axially from said at least one second groove, said at least one second groove substantially perpendicular to said plurality of first grooves and extending partially circumferentially through said inner surface, at least one of said plurality of first grooves comprising an opening extending between said second rotor shaft inner surface and said second rotor shaft outer surface.
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14. A gas turbine engine comprising:
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a first rotor shaft comprising an outer surface and an axis of symmetry;
a bearing assembly configured to support said first rotor shaft; and
a lubrication system comprising a second rotor shaft concentrically around said first rotor shaft such that said second rotor shaft rotates simultaneously with said first rotor shaft, said second rotor shaft comprising an inner surface and an outer surface, said inner surface comprising a plurality of first grooves and at least one second groove, said plurality of first grooves in flow communication with and extending axially from said at least one second groove, said at least one second groove substantially perpendicular to said plurality of first grooves and extending partially circumferentially around said inner surface, said lubrication system configured to supply lubricate said bearing assembly, said at least one second groove comprising an opening extending between said second rotor shaft inner and outer surfaces. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification