Abstract: A bladed rotor includes rotor disc having a peripheral region, and a plurality of rotor blades attached to and extending radially outwardly from peripheral region. Each rotor blade has a root portion which is located in a correspondingly shaped axially-extending slot provided in the peripheral region of rotor disc, and the root portion of each blade is axially retained in its respective slot by a plate located axially adjacent the root portion and rotor disc, and which extends circumferentially across respective slot. Retention plate is held in position by seal member having a first surface which engages radially-inwardly directed surface of rotor disc, and second surface which is located radially-outwardly of first surface and engages the retention plate. Seal member has a curved profile in radial cross-section so as to define a concavity located radially between first and second engaging surfaces and which is directed axially towards the rotor disc.

Abstract: A bladed rotor includes rotor disc having a peripheral region, and a plurality of rotor blades attached to and extending radially outwardly from peripheral region. Each rotor blade has a root portion which is located in a correspondingly shaped axially-extending slot provided in the peripheral region of rotor disc, and the root portion of each blade is axially retained in its respective slot by a plate located axially adjacent the root portion and rotor disc, and which extends circumferentially across respective slot. Retention plate is held in position by seal member having a first surface which engages radially-inwardly directed surface of rotor disc, and second surface which is located radially-outwardly of first surface and engages the retention plate. Seal member has a curved profile in radial cross-section so as to define a concavity located radially between first and second engaging surfaces and which is directed axially towards the rotor disc.