DEVICE FOR ADJUSTING THE CENTRING OF A TURBO-ENGINE PIVOTING VANE CONTROL SYNCHRONIZATION RING

Abstract

The invention relates to a device for adjusting the centring of a turbo-engine pivoting vane control ring, comprising a control ring (26) centred on a longitudinal axis (X-X) of the turbo-engine and provided with a plurality of tapped holes (36) running in a radial direction and a plurality of pad holders (32), each comprising a threaded rod (34) screwed into one of the ring's tapped holes (36), each pad holder (32) holding, at an inner end, a pad (30) intended to come into contact with a cylindrical shell (28), coaxial with the ring. The control ring (26) comprises, in addition, a plurality of slots (38) running in a tangential direction, each slot (38) communicating with one of the ring's tapped holes (36) The device comprises means (40, 42a, 42b) of pinching, in a longitudinal direction, each of the slots (38) in such a way as to lock the pad holders (32) in position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of this invention will be evident from the description given below, with reference to the attached drawings, which illustrate an example of the embodiment of the said invention, without any limiting nature. Concerning the illustrations,

FIG. 1 schematically shows a stage of pivoting vanes with a control ring,

FIG. 2 is a perspective view of the adjusting device in accordance with the invention before its assembly,

FIG. 3 is a perspective view of the device in FIG. 2 after its assembly and

FIGS. 4 and 5 are cutaway views of the device in FIG. 3, in a longitudinal plane and radial plane, respectively.

Claims

1. Device for adjusting the centring of a turbo-engine pivoting vane (16) control ring (26), comprising a control ring (26) centred on a longitudinal axis (X-X) of the turbo-engine and provided with a plurality of tapped holes (36) running in a radial direction and a plurality of pad holders (32), each comprising a threaded rod (34) screwed into one of the ring's tapped holes (36), each pad holder (32) holding, at an inner end, a pad (30) intended to come into contact with a cylindrical shell (28) coaxial with the ring (26), characterized in that the control ring (26) comprises, in addition, a plurality of slots (38) running in a tangential direction and going through the ring radially, each slot (38) communicating with one of the ring's tapped holes (36) and in that the device comprises means (40, 42) of pinching, in a longitudinal direction, each of the slots (38) in such a way as to lock the pad holders (32) in position.

2. Device according to claim 1, characterized in that the control ring (26) comprises, in addition, a plurality of holes (40) running in a longitudinal direction, each hole (40) communicating with one of the ring's slots (38) and in that the device comprises a plurality of bolt-connection systems (42), each inserted in one of the holes (40) in the ring in such a way as to effect pinching, in a longitudinal direction, of the corresponding slot (38).

3. Device according to either of claims 1 and 2, characterized in that each slot (38) runs, at one of its tangential ends, into one of the tapped holes (36) of the control ring (26).

4. Device according to claim 3, characterized in that each slot (38) runs, at its tangential end opposite the tapped hole (36), into a smooth bore (44) going through the control ring (26) radially.

5. Turbo-engine, characterized in that it comprises at least one device for adjusting the centring of a pivoting vane (16) control ring (26) according to any one of claims 1 to 4.