Rotationally guided control ring for pivotable vanes in a turbom

Details Rotationally guided control ring for pivotable vanes in a turbom Rotationally guided control ring for pivotable vanes in a turbom

1993-12-22

1995-02-07

Kwon, John T.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Runner, shaft, or separate motor operated

415162, F04D 2960

Patent

active

053870808

ABSTRACT:
A control ring for a stage of pivotable vanes on the stator of a turbomachine carries a plurality of adjustable shoes for contacting a circular surface to set and maintain the coaxiality of the control ring during rotation thereof to pivot the vanes. The radial position of each shoe is adjusted by virtue of a double screw having two screw-threaded portions, one engaging with an internally threaded portion of a bush fixed to the control ring and the other engaging with an internally threaded portion of a shoe-holder which is mounted slidably and non-rotatably in the bush, the two screw-threaded portions having slightly different pitches so as to permit very fine adjustment of the shoe postion.

REFERENCES:
patent: 2924375 (1960-02-01), McKissock
patent: 2940784 (1960-06-01), Fell
patent: 3356288 (1967-12-01), Corsmeier
patent: 3496628 (1970-02-01), Davis
patent: 4498625 (1985-02-01), Schechter
patent: 4925364 (1990-03-01), Das
patent: 5096375 (1992-03-01), Ciokailo

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