METHOD AND APPARATUS FOR DETERMINING GAS TURBINE DAMPENING CONE INNER DIAMETER

摘要

Gas turbine engine generally ring-shaped dampening cone inner diameters, including those having spherical or other convex inner diameter surface profiles, are determined with a fixture including a displacement indicator having an axis of displacement in alignment with a locating pin. The dampening cone inner diameter surface is placed in contact with the locating pin on one side and a displacement point on the other side, so that the dampening cone inner diameter surface circumscribes a contact surface formed on the locating pin and the displacement point. The indicator displacement is correlated with the dampening cone inner diameter.

主权项

1. A method for determining internal diameter of a generally ring-shaped gas turbine engine dampening cone having an axial end surface and at least one inner diameter surface, comprising:
providing a measurement fixture defining a planar reference surface and having: a locating pin projecting upwardly from the defined planar reference surface, the locating pin defining a contact surface; and a displacement indicator, coupled to the measurement fixture, having a displaceable point defining a displacement axis that is aligned with the locating pin contact surface; providing a generally ring-shaped gas turbine engine dampening cone having an axial end surface and at least one inner diameter surface; circumscribing the locating pin contact surface and the displaceable point circumferentially within the dampening cone inner diameter surface and abutting the axial end surface against the planar reference surface; and determining the dampening cone inner diameter by correlating indicator displaceable point displacement position relative to the locating pin contact surface.