US 7,744,344 B2 · Vane coupling

Abstract

Vanes are generally hollow with a passage through which service pipes extend. These service pipes must be connected such that they can allow for thermal expansion and contraction but also anti rotation features are needed in order to prevent damage when a supply coupling is connected through a pipe end. This anti-rotation feature is generally provided between a top hat and a pipe end through flanges. In order to allow reduced spacing between the top of the vane and a casing the flanges are arranged to allow at least recessing of a first flange into a passage opening profile whereby those flanges inter-engage with second flanges at a surface interface to prevent rotation.

Claims19

Dependent claims

A vane mounting arrangement for a gas turbine engine, the arrangement comprising:

a pipe end having a first lateral flange;
and
a top hat member having a second lateral flange, wherein the first lateral flange and the second lateral flange engage upon each other in use to prevent rotation between the pipe end and the top hat, the first lateral flange and the second lateral flange being offset relative to each other, said pipe end and said top hat including means to secure them together, wherein said means to secure together the top hat member and the pipe end comprises a screw thread on the pipe end extending through the top hat member and a nut for securing on the screw thread to clamp the top hat member between said nut and said pipe end.

Dependencies are inferred from the claim text.

Vane coupling

Life of this patent

Vane coupling

Life of this patent

Abstract

Claims19