Patent ID: 8123472

Claim:
A unison ring assembly for an axial compressor casing, comprising: a unison ring; at least three unison ring supports equally spaced arranged along a circumference of the unison ring, wherein each unison ring support comprises a unison ring bracket fixed to the unison ring; a slide bearing to be sliding along a slide face of an outer surface of the compressor casing; a resilient member being arranged between and coupled to the slide bearing and the unison ring bracket such that the unison ring is rotatable around the compressor casing by sliding the slide bearing along the slide face and to be centered free of clearance about the compressor casing; and a raising device adapted to raise the slide bearing towards the unison ring bracket thereby compressing the resilient member, wherein each resilient member is adapted to accommodate radial displacement of the compressor casing, wherein each resilient member comprises at least one slide pin with a first end supported at the unison ring bracket of the respective unison ring support and a second end extending in a radial direction towards a centre of the unison ring together with an elastic element, the elastic element being arranged between the second end of the slide pin and the slide bearing.