Internal retaining ring arrangement for a rotor assembly

A rotor assembly of a gas turbine engine, comprising:

• a first rotor component rotatable about a rotation axis;
• a second rotor component mounted for joint rotation with the first rotor component, the second rotor component having an inner diameter surface and a groove defined in the inner diameter surface;
• a lock nut threadably engaged with the first rotor component to axially lock the second rotor component relative to the first rotor component;
• a locking washer in anti-rotation engagement with the lock nut and the second rotor component to prevent loosening of the lock nut;
• and
• an internal retaining ring engaged in the groove defined in the inner diameter surface of the second rotor component, the internal retaining ring having:
• a split ring body extending from a first end to a second end, the first and second ends circumferentially spaced by a gap, the split ring body having a first axially facing surface and a second axially facing surface opposite to the first axially facing surface, the first axially facing surface axially bearing against the locking washer, the second axially facing surface having a radially outer beveled edge, the radially outer beveled edge in sliding contact with a corresponding beveled edge of the groove of the second rotor component, and centrifugal weights distributed along a circumference of the split ring body, the centrifugal weights calibrated to cause a centrifugal expansion of the internal retaining ring to compensate for a thermal growth difference between the second rotor component and the internal retaining ring during operation of the gas turbine engine.