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US 2012/0070278 A1Published application
Gas turbine engine bearing arrangement
AssigneeROLLS-ROYCE plc
InventorAlan R. MAGUIRE
Life of this patent
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Abstract
A gas turbine engine comprising first and second rotor shafts and an intershaft rolling element bearing arranged between the shafts. The first rotor shaft has a stator stage and a rotor stage; the second rotor shaft has only a rotor stage and is arranged to contra-rotate relative to the first shaft. The intershaft bearing is arranged between the first and second shafts such that the relative speeds of the shafts minimise a cage speed of the intershaft bearing.
Claims9
A gas turbine engine comprising:
- a first rotor shaft having a stator stage comprising an annular array of stator blades and a rotor stage comprising an annular array of rotor blades;
- a second rotor shaft having only a rotor stage comprising an annular array of rotor blades, the second shaft arranged to contra-rotate relative to the first shaft;
- and
- an intershaft rolling element location bearing arranged between the first and second shafts, wherein the relative speeds of the shafts minimises a cage speed of the intershaft bearing.
1 more element
Dependencies are inferred from the claim text.