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US 4,784,012 AGranted
Rotor balance system
AssigneeUnited Technologies Corporation
InventorJohn J. Marra
Life of this patent
Estimating the term…
Abstract
A balance ring (18) which is shrunk fit within each disk (12) of a rotor is selectively ground for detail balance. A plurality of openings (20) through the outer edge of the balance ring receive weights during the assembly balance of the rotor. A snap ring (44) retains the weights within the openings. An eccentric inwardly extending raised area (26) throughout a substantial minority of the circumference provides for initial gross unbalance correction upon installation.
Claims5
A rotor balance system for an integrally bladed gas turbine engine rotor comprising:
- a plurality of disks, each carrying a plurality of integral blades;
- a single balance ring internally shrink fit to each disk;
- an eccentric raised area throughout a substantial minority of the circumference of each balance ring, said balance ring being substantially uniform throughout the remainder of the circumference;
- said balance ring selectively ground to establish a detail balanced condition of each disk;
- a plurality of openings through the outer edge of each balance ring;
- a plurality of balance weights within said openings for establishing a balanced condition of the assembled plurality of disks;
- and
- a snap ring internal of each disk adjacent to said balance ring for retaining said balance weights within said openings.
5 more elements
Dependencies are inferred from the claim text.