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US 11,085,633 B2Granted
Nozzle with insulating air gap and seal to close the gap
AssigneeROLLS-ROYCE plc
InventorMark Glover
Life of this patent
Estimating the term…
Abstract
A nozzle for a fuel injector of a gas turbine engine, the nozzle having an insulating air gap adjacent a conduit for carrying fuel, the air gap formed between a pair of concentrically arranged annular walls, wherein the pair of annular walls are arranged to move independently to accommodate differential thermal expansion, the nozzle further including: a channel extending circumferentially around a surface a first of the pair of annular walls, facing a second of the pair of annular walls; and a sealing member received in the channel, to close the insulating gap.
Claims16
A nozzle for a fuel injector of a gas turbine engine, the nozzle comprising:
- an insulating air gap adjacent a fuel conduit, the insulating air gap being formed between a pair of concentrically arranged annular walls, wherein the pair of concentrically arranged annular walls are arranged to move independently to accommodate differential thermal expansion;
- a channel extending circumferentially around a surface of a first annular wall of the pair of concentrically arranged annular walls, facing a second annular wall of the pair of concentrically arranged annular walls;
- a piston ring sealing member received in the channel, to close the insulating air gap, wherein the piston ring sealing member includes a split extending from an outer-most circumferential edge of the piston ring sealing member to an inner-most circumferential edge of the piston ring sealing member;
- and
- an air swirler concentrically within the fuel conduit,
- wherein one of the first annular wall or the second annular wall is adjacent the fuel conduit, and
- wherein the other of the first annular wall or the second annular wall includes an aperture extending therethrough, the aperture being located such that the piston ring sealing member is between the aperture and an outlet end of the nozzle, and wherein, during operation of the nozzle, the insulating air gap is configured to receive air from the aperture to form a pressure differential over the piston ring sealing member and the fuel conduit is configured to carry fuel.
4 more elements
A nozzle for a fuel injector of a gas turbine engine, the nozzle comprising:
- an insulating air gap adjacent a fuel conduit, the insulating air gap being formed between a pair of concentrically arranged annular walls, wherein the pair of concentrically arranged annular walls are arranged to move independently to accommodate differential thermal expansion;
- a pair of axially spaced annular circumferential projections extending from a first annular wall of the pair of concentrically arranged annular walls;
- a channel extending circumferentially around a surface of the first annular wall of the pair of concentrically arranged annular walls, facing a second annular wall of the pair of annular walls, wherein the channel is formed between the pair of axially spaced annular circumferential projections;
- a sealing member received in the channel, to close the insulating air gap, wherein the sealing member includes a split extending from an outer-most circumferential edge of the sealing member to an inner-most circumferential edge of the sealing member;
- and
- an air swirler concentrically within the fuel conduit,
- wherein one of the first annular wall or the second annular wall is adjacent the fuel conduit, and
- wherein the other of the first annular wall or the second annular wall includes an aperture extending therethrough, the aperture being located such that the sealing member is between the aperture and an outlet end of the nozzle, and wherein, during operation of the nozzle, the insulating air gap is configured to receive air from the aperture to form a pressure differential over the sealing member and the fuel conduit is configured to carry fuel.
5 more elements
A nozzle for a fuel injector of a gas turbine engine, the nozzle comprising:
- an insulating air gap adjacent a fuel conduit, the insulating air gap being formed between a pair of concentrically arranged annular walls, wherein the pair of concentrically arranged annular walls are arranged to move independently to accommodate differential thermal expansion;
- a channel extending circumferentially around a surface of a first annular wall of the pair of concentrically arranged annular walls, facing a second annular wall of the pair of concentrically arranged annular walls;
- a sealing member received in the channel, to close the insulating air gap, wherein the sealing member includes a split extending from an outer-most circumferential edge of the sealing member to an inner-most circumferential edge of the sealing member;
- and
- an air swirler concentrically within the fuel conduit,
- wherein one of the first annular wall or the second annular wall is adjacent the fuel conduit, and
- wherein the other of the first annular wall or the second annular wall includes an aperture extending therethrough, the aperture being located such that the sealing member is between the aperture and an outlet end of the nozzle, and wherein, during operation of the nozzle, the insulating air gap is configured to receive air from the aperture to form a pressure differential over the sealing member and the fuel conduit is configured to carry fuel.
4 more elements
Dependencies are inferred from the claim text.