Shaft balancing

Details Shaft balancing Shaft balancing

1977-11-25

1979-12-11

Scott, Samuel

Machine element or mechanism

Elements

Flywheel, motion smoothing-type

F16F 1522

Patent

active

041776925

ABSTRACT:
A gas turbine engine has an internal drive shaft including one end connected to a driven load and an opposite end connected to a turbine wheel and wherein the shaft has an in situ adjustable balance system near the critical center of a bearing span for the shaft including two 360.degree. rings piloted on the outer diameter of the shaft at a point accessible through an internal engine panel; each of the rings has a small amount of material removed from its periphery whereby both of the rings are precisely unbalanced an equivalent amount; the rings are locked circumferentially together by radial serrations thereon; numbered tangs on the outside diameter of each ring identify the circumferential location of unbalance once the rings are locked together; an aft ring of the pair of rings has a spline on its inside diameter that mates with a like spline on the shaft to lock the entire assembly together.

REFERENCES:
patent: 1645343 (1927-10-01), Moorhouse
patent: 3159050 (1964-12-01), Wilson
patent: 3528316 (1970-09-01), Hammer
patent: 3916495 (1975-11-01), Klassen et al.
patent: 4059972 (1977-11-01), Beam, Jr. et al.

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