Temporary locking system for variably settable stator blades

Details Temporary locking system for variably settable stator blades Temporary locking system for variably settable stator blades

1990-06-06

1991-03-19

Look, Edward K.

Rotary kinetic fluid motors or pumps

Selectively adjustable vane or working fluid control means

Runner, shaft, or separate motor operated

415160, 415190, 4152093, 416212A, 416220R, 403337, F01B 2500, F01D 1700

Patent

active

050006592

ABSTRACT:
In a turbomachine, such as a turboshaft aero-engine, having a compressor casing composed of upstream and downstream casing rings, and a variably settable stage of stator blades which is mounted in one of said casing rings near the junction therebetween so that, in normal operation, the blades have their leading (or trailing) edges projecting into the other casing ring, the setting of the blades being adjusted by a control ring surrounding the casing, there is provided a locking system for temporarily locking the blades in an angular setting in which the leading (or trailing) edges are retracted clear of said other casing when the casing is to be dismantled or assembled. The locking system comprises at least one locking member which is held captive on one of the screws securing the two casing rings together, the member being movable in the axial direction by the screw and having axially extending wings which engage in slots in the control ring to effect the locking of the stator blades when the screw is unscrewed.

REFERENCES:
patent: 3558237 (1971-01-01), Wall, Jr.
patent: 3842595 (1974-10-01), Smith et al.
patent: 3860358 (1975-01-01), Cavicchi et al.
patent: 4011718 (1977-03-01), Asplund
patent: 4363600 (1982-12-01), Thebert
patent: 4391565 (1983-05-01), Speak
patent: 4498790 (1985-02-01), Fisher
patent: 4684320 (1987-08-01), Kunz

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