A gas turbine engine has a turbine section and an air moving section upstream of the turbine section. A seal is between a static surface and a rotating surface in at least one of the turbine section and air moving section. The seal includes a seal shoe which is biased at least in part by a spring fo
A gas turbine engine has a turbine section and an air moving section upstream of the turbine section. A seal is between a static surface and a rotating surface in at least one of the turbine section and air moving section. The seal includes a seal shoe which is biased at least in part by a spring force, with the spring force created by cuts formed to provide a gap to allow arms associated with the seal to provide the spring force. The movement of the shoe is along a direction having at least a component parallel to an axis of rotation of the gas turbine engine. In addition, an axially moving non-contact seal is claimed.
대표청구항▼
1. A gas turbine engine comprising: a turbine section and an air moving section upstream of the turbine section; anda seal between a static surface and a rotating surface in at least one of said turbine section and said air moving section;said seal including a seal shoe which is biased at least in p
1. A gas turbine engine comprising: a turbine section and an air moving section upstream of the turbine section; anda seal between a static surface and a rotating surface in at least one of said turbine section and said air moving section;said seal including a seal shoe which is biased at least in part by a spring force, with said spring force created by cuts formed to provide a gap to allow arms associated with said seal to provide said spring force, and the movement of said shoe being along a direction having at least a component parallel to an axis of rotation of the gas turbine engine; andwherein the movement of said shoe is one of directly parallel to said axis of rotation, or the movement of said shoe also having a radial component, and said seal sealing on a generally conical shaped surface. 2. The gas turbine engine as set forth in claim 1, wherein said air moving section includes one of a fan and a compressor. 3. The gas turbine engine as set forth in claim 1, wherein said turbine section drives a fan through a gear reduction. 4. The gas turbine engine as set forth in claim 3, wherein a gear ratio of said gear reduction is greater than or equal to about 2.4. 5. The gas turbine engine as set forth in claim 1, wherein said movement of said shoe is directly parallel to said axis of rotation. 6. The gas turbine engine as set forth in claim 1, wherein the movement of said show also having a radial component, and said seal sealing on a generally conical shaped surface. 7. The gas turbine engine as set forth in claim 1 wherein high pressure air is delivered into a cavity within said seal to drive said shoe toward an opposed surface. 8. The gas turbine engine as set forth in claim 7, wherein a dynamic pressure between the seal and an opposed surface tends to bias said shoe away from said surface. 9. The gas turbine engine as set forth in claim 8, wherein said seal is attached to said static structure, and said surface is a rotating surface that rotates with one of said air moving and turbine sections. 10. The gas turbine engine as set forth in claim 8, wherein said shoe and said carrier are formed in segments by said gaps. 11. The gas turbine engine as set forth in claim 10, wherein said shoes extend circumferentially, and are curved about said axis of rotation. 12. The gas turbine engine as set forth in claim 1, wherein said shoes extend circumferentially, and are curved about said axis of rotation. 13. The gas turbine engine as set forth in claim 1, wherein said seal is mounted to said static structure, and seals relative to said rotating surface. 14. A gas turbine engine comprising: a turbine section, a fan and a compressor;a seal between a static surface and a rotating surface in at least one of said turbine section, said fan and said compressor, said seal including a seal shoe which is biased forwardly and outwardly relative to a static structure at least in part by a spring force, with said spring force created by cuts formed to provide a gap to allow arms associated with said seal to provide said spring force, and the movement of said shoe being along a direction having at least a component parallel to an axis of rotation of the gas turbine engine;said turbine section drives said fan through a gear reduction;high pressure air is delivered into a cavity within said seal to drive said shoe toward an opposed surface, a dynamic pressure between the seals and the opposed surface tending to bias said shoe away from said surface;said shoe extends circumferentially, and is curved about said axis of rotation; andwherein the movement of said shoe is one of directly parallel to said axis of rotation, or the movement of said shoe also having a radial component, and said seal sealing on a generally conical shaped surface. 15. The gas turbine engine as set forth in claim 14, wherein said movement of said shoe is directly parallel to said axis of rotation. 16. The gas turbine engine as set forth in claim 14, wherein the movement of said shoe also having a radial component, and said seal sealing on a generally conical shaped surface. 17. The gas turbine engine as set forth in claim 14, wherein said seal is mounted to said static structure and seals relative to said rotating surface. 18. The gas turbine engine as set forth in claim 14, wherein a gear ratio of said gear reduction is greater than or equal to about 2.4. 19. The gas turbine engine as set forth in claim 14, wherein said fan delivering a portion of air into a bypass duct, and a portion of air as core air flow to said compressor, with a bypass ratio being greater than or equal to about 6. 20. An axially moving non-contact seal comprising: a seal body including a seal shoe which is biased axially forwardly and outwardly at least in part by a spring force, with said spring force created by cuts formed to provide a gap to allow arms associated with said seal to provide said spring force;high pressure air delivered into a cavity within said seal to drive said shoe toward an opposed surface;a dynamic pressure between the seal and the opposed surface tends to bias said shoe away from the surface;said shoe extending circumferentially, and being curved about a central axis in a circumferential direction; andwherein the movement of said shoe is one of directly parallel to said axis of rotation, or the movement of said shoe also having a radial component, and said seal sealing on a generally conical shaped surface.
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