Back to results
US 10,544,834 B1Granted
Bearing for use in high speed application
AssigneesRolls-Royce North American Technologies Inc., ROLLS-ROYCE plc
InventorsPhillip H. Burnside, Andrew Schwendenmann
Life of this patent
Estimating the term…
Abstract
A bearing system includes bearing unit and a lubrication system. The bearing unit includes an outer race, a plurality of internal rotating components, and an inner race. The lubrication system includes an injector for delivering a stream of lubrication to the plurality of rotating components to withdraw heat generated and lubricate the bearing unit during operation of the bearing system.
Claims20
A bearing system comprising
- an outer race that extends around a central axis,
- an inner race that extends around and rotates in a first direction about the central axis relative to the outer race and spaced apart radially from the outer race to define a bearing cavity therebetween,
- a plurality of internal rotating components arranged radially between the inner race and the outer race to engage the inner race and the outer race, and
- a lubrication system configured to provide lubrication to the plurality of internal rotating components during rotation of the inner race, the lubrication system including a side-jet injector located in spaced-apart relation to the outer race in a fixed position relative to the outer race and configured to inject a stream of lubrication from an outlet formed in the side-jet injector in an axial direction toward the plurality of internal rotating components, and a windage barrier located adjacent to the outlet of the side-jet injector in a fixed position relative to the side-jet injector and the outer race upstream from the outlet and configured to establish a zone of stagnant fluid downstream of the windage barrier such that the stream moves through the zone from the outlet to the plurality of rotating components.
1 more element
A gas turbine engine comprising
- a bearing housing formed to include a cavity therein,
- a rotor located in the cavity and adapted for rotation in a first direction about a central axis relative to the bearing housing, the rotor being configured to generate a windage that flows in the first direction during rotation of the rotor about the central axis,
- a bearing unit arranged to extend between and interconnect the rotor and the bearing housing to support the rotor, and
- a lubrication system configured to provide lubrication to the bearing unit during rotation of the rotor, the lubrication system including a side-jet injector coupled to the case in a fixed position relative to the bearing unit and the rotor and configured to inject a stream of lubrication from an outlet formed in the side-jet injector in an axial direction toward the bearing unit to lubricate and cool the bearing unit, and a windage barrier coupled to the bearing housing in a fixed position adjacent to and upstream from the outlet and configured re-direct the windage from flowing in the first direction to flowing another direction perpendicular to the first direction to create a zone of stagnant air downstream of the windage barrier such that the stream of lubrication moves through the zone from the outlet to the bearing unit,
- wherein the bearing unit has a bearing speed of greater than about 1.5 MDN.
2 more elements
Dependencies are inferred from the claim text.