Variable vane position adjuster

Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner

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Details

F01D 1716

Patent

active

043079946

ABSTRACT:
A turbine vane adjustment assembly for calibrating the nozzle/throat width dimension between adjacent adjustable vanes in a nozzle vane ring assembly and for producing conjoint rotation of the individual vane following their calibration includes a vane stem that extends outwardly of a turbine case and further includes a motion converting sleeve in surrounding relationship thereto and coacting means between the sleeve and the vane stem that concurrently rotates both the sleeve and the stem and also provides relative axial movement of the sleeve with respect to the vane stem; the adjustment assembly further includes an actuator arm for rotating each of the vanes and means for connecting the actuator arm to the sleeve to cause angular positioning of the actuator arm to be directly transmitted to each of the vanes following calibration thereof. A calibration adjustment nut is located at a point accessible from externally of the turbine case and is associated with the sleeve and operative to axially position it on the vane stem and wherein coacting means on the sleeve and the actuator arm are responsive to axial positioning of the sleeve on the vane stem to rotate it relative to the actuator arm so that the vane stem can be prepositioned to selectively vary the throat width clearance between selected ones of adjacent nozzle vanes in the assembly.

REFERENCES:
patent: 2651492 (1953-09-01), Feilden
patent: 2671634 (1954-03-01), Morley
patent: 3079128 (1963-02-01), Burge
patent: 3367628 (1968-02-01), Fitton
patent: 3954349 (1976-05-01), Abild
patent: 4193738 (1980-03-01), Landis et al.
patent: 4195964 (1980-04-01), Kraft et al.

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