Rotors for gas turbine engines
AssigneeROLLS-ROYCE plc
InventorJohn H. M. Atkinson
Life of this patent
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Abstract
A rotor assembly for a gas turbine engine has platformless blades and the inner wall of the compressed air annulus is made up of separate annulus members bridging the spaces between pairs of adjacent blades. The invention provides salient feet on the annulus members which are fitted through the narrow necks of re-entrant grooves in a direction radially inwardly of the rotor disc. Wedges are slid between feet and the walls of the grooves to prevent removal of the feet and therefore the annulus members in a reciprocal direction.
Claims7
A rotor assembly for a gas turbine engine comprising a rotor disc supporting a peripherally arranged plurality of blades, re-entrant grooves being provided in the disc rim which extend through the thickness thereof, one said re-entrant groove being located between each pair of adjacent blades, annulus wall members bridging the space between each pair of adjacent blades, each annulus wall member having a salient foot shaped similarly to the re-entrant grooves and proportioned so as to pass through the neck of a respective re-entrant groove in a direction radially inwardly of the disc and wedges positioned between the opposing walls of cooperating re-entrant grooves and salient feet so as to prevent withdrawal of the feet in a direction radially outwardly of the disc.
A rotor assembly for a gas turbine engine comprising a rotor disc supporting a peripherally arranged plurality of blades, re-entrant grooves being provided in the disc rim which extend through the thickness thereof, one said re-entrant groove being located between each pair of adjacent blades, annulus wall members bridging the space between each pair of adjacent blades, each annulus wall member having a salient foot shaped similarly to the re-entrant grooves and proportioned so as to pass through the neck of a respective re-entrant groove in a direction radially inwardly of the disc and wedges positioned between the opposing walls of cooperating re-entrant grooves and salient feet so as to prevent withdrawal of the feet in a direction radially outwardly of the disc, and wherein the annulus wall members are manufactured from a carbon fibre reinforced thermoplastic polymer.
Dependencies are inferred from the claim text.