Dovetail weight system for rotor balance

A rotating assembly of a gas turbine engine, comprising:

• one or more rotating components including one or more balancing slots;
• and
• a balancing assembly disposed at a balancing slot of the one or more balancing slots, including:
• a balance weight inserted into the balance weight slot, the balance weight having a dovetail shaped cross-section and the balance weight slot having a complimentary dovetail shaped cross-section, the balance weight slot having:
• a radial slot depth;
• a first circumferential slot width at a radially inner surface of the component;
• and
• a second circumferential slot width at the slot depth, the second circumferential slot width greater than the first circumferential slot width;
• and
• a retaining ring installed to the rotating component to axially retain the balance weight in the balance weight slot.

A method of correcting an imbalance of a rotating assembly, comprising:

• inserting a balance weight into a balance weight slot in a rotating component of the rotating assembly;
• and
• installing a retaining ring at the rotating component to retain the balance weight in the balance weight slot in an axial direction;
• wherein the balance weight has a dovetail shaped cross section, and the balance weight slot has a complimentary dovetail shaped cross section to retain the balance weight at the balance weight slot in a radial direction, the balance weight slot having:
• a radial slot depth;
• a first circumferential slot width at a radially inner surface of the component;
• and
• a second circumferential slot width at the slot depth, the second circumferential slot width greater than the first circumferential slot width.