Actuator mechanism for variable angle vane arrays

Details Actuator mechanism for variable angle vane arrays Actuator mechanism for variable angle vane arrays

1996-04-05

1997-04-15

Kwon, John T.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Runner, shaft, or separate motor operated

74109, F01D 1712

Patent

active

056203012

ABSTRACT:
A power turbine includes a stage of pivotable nozzle vanes. The individual vanes are pivoted by connecting them to a toothed unison ring via actuating levers in the form of gear segments. The gear segments only have sufficient teeth to enable pivoting of the vanes between normal maximum and minimum operating angles. If an emergency closure of the nozzle is required, the unison ring pivots the gear therewith, whereupon pins on the unison ring engage projections on each segment, thus causing the segments to continue pivoting the vanes to a closed position.

REFERENCES:
patent: 4258580 (1981-03-01), Lowe
patent: 4530252 (1985-07-01), Sarges et al.

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