Patent ID: 7980815
Filing Date: 2011-07-19
Classification: F01D,F04D,F05D

Abstract:
1. A turbomachine variable-pitch stator blade comprising: an aerofoil, extended on one side by a pivot which is mounted so as to rotate in a bore of a casing of the turbomachine; and a plate disposed between the aerofoil and the pivot and perpendicular to a line formed by the aerofoil and the pivot, wherein a face of the plate opposite to the aerofoil includes a first zone and a second zone, the first zone being subjected to friction with the wall of the casing due to transverse forces applied to the aerofoil, the thickness of the plate on the second zone is reduced relative to the thickness of the plate of the first zone, and wherein the second thinner zone includes a cavity provided in the plate.