Augmentor spray bar mounting
A gas turbine engine augmentor has a centerbody within a gas flowpath from upstream to downstream. The augmentor has upstream and downstream shell sections, a downstream rim of the upstream shell section meeting an upstream rim of the downstream shell section shell section. A plurality of vanes are positioned in the gas flowpath outboard of the centerbody. An augmentor spray bar fuel conduit extends through the centerbody and a first of the vanes to deliver fuel to the centerbody. A seal is mounted to the spray bar and positioned in a recess extending from at least one of the downstream rim of the upstream shell section and upstream rim of the downstream shell section shell section. The seal has a first portion and a second portion engaging the first portion in a backlocked interfitting.
1. An augmentor spray bar seal comprising:
a first portion comprising electrographitic carbon; and
a second portion comprising electrographitic carbon and engageable to the first portion in a backlocked interfitting in an assembled configuration wherein:
a periphery the seal is shaped essentially as a non-right non-circular cylinder; and
a planform of the seal is characterized by a straight first end, an at least partially rounded second end, and first and second straight sides.
2. The seal of claim 1 wherein:
an aperture of the seal is shaped essentially as non-right obround cylinder, non-parallel to a periphery of the seal.
3. The seal of claim 1 wherein the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
4. The seal of claim 3 wherein the backlocked interfitting is reversible.
5. The seal of claim 1 wherein the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
6. The seal of claim 5 wherein the backlocked interfitting is reversible.
7. The seal of claim 1 wherein in the assembled condition:
the first portion and second portion are combined to surround an aperture.
8. The seal of claim 7 wherein the first portion and second portion each have a pair of mating features, the mating features of the first portion engageable to the mating features of the second portion in a snap fit to provide the backlocked interfitting.
9. The seal of claim 7 wherein:
the aperture is shaped essentially as non-right obround cylinder, non-parallel to a periphery of the seal.
10. An augmentor spray bar seal comprising:
a first portion comprising electrographitic carbon; and
a second portion comprising electrographitic carbon and engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein:
the first portion and second portion are combined to surround an aperture;
the aperture is shaped essentially as non-right obround cylinder, non-parallel to a periphery of the seal; and
the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
11. An augmentor spray bar seal comprising:
a first portion; and
a second portion engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein an aperture of the seal is shaped essentially as a non-right non-circular cylinder and a planform of the seal is characterized by a straight first end, an at least partially rounded second end, and first and second straight sides.
12. The seal of claim 11 wherein the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
13. An augmentor spray bar seal comprising:
a first portion; and
a second portion engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein a periphery of the seal is shaped essentially as a non-right non-circular cylinder and a planform of the seal is characterized by a straight first end, an at least partially rounded second end, and first and second straight sides.
14. The seal of claim 13 wherein the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
15. An augmentor spray bar seal comprising:
a first portion; and
a second portion engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein a periphery of the seal is shaped essentially as a non-right non-circular cylinder and the first portion and second portion each have a pair of half dovetail features engageable to provide said backlocked interfitting.
16. An augmentor spray bar seal comprising:
a first portion comprising electrographitic carbon; and
a second portion comprising electrographitic carbon and engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein:
an aperture of the seal is shaped essentially as non-right obround cylinder, non-parallel to a periphery of the seal.
17. An augmentor spray bar seal comprising:
a first portion comprising electrographitic carbon; and
a second portion comprising electrographitic carbon and engageable to the first portion in a backlocked interfitting in an assembled configuration,
wherein:
a periphery of the seal is shaped essentially as a non-right non-circular cylinder; and
an aperture of the seal is shaped essentially as non-right obround cylinder, non-parallel to the periphery of the seal.