Patent ID: 8651803
Filing Date: 2014-02-18
Classification: F01D,F04D,Y10T

Abstract:
1. A variable stator vane assembly for a gas turbine engine, the assembly including a stator vane with an airfoil and an upper stem section extending from the airfoil, a lever arm engageable on an upper surface of the upper stem section when mounted to the stator vane, and a retaining element for retaining the lever arm mounted on the stator vane, the upper stem section having a formation between the upper surface thereof and the airfoil with at least one engagement face, a corresponding projecting formation on the underside of the lever arm, which projecting formation is engageable against said engagement face when the lever arm is mounted on the stator vane for transmitting torque from the lever arm to the upper stem section and a recess extending into the upper stem section from the upper surface, the recess being threaded to receive the retaining element to retain the lever arm to the upper stem section; characterised in that the upper surface has an alignment projection that passes at least partially through an aperture in the lever arm and is visible when the lever arm and upper stem section are engaged, the alignment projection and aperture being arranged such that there is only full mounting of the lever arm on the stator vane at one respective axial orientation.