초록

A seal assembly for a rotational assembly includes a first seal, a second seal and a crossover support. The crossover support includes a first geometry that interacts with the first seal and a second, different geometry that interacts with the second seal.

대표청구항 ▼

1. A seal assembly for a rotational assembly, comprising: a first seal;a second seal;a crossover support between said first seal and said second seal and having a first geometry for interacting with said first seal and a second, different geometry for interacting with said second seal; anda spring i

1. A seal assembly for a rotational assembly, comprising: a first seal;a second seal;a crossover support between said first seal and said second seal and having a first geometry for interacting with said first seal and a second, different geometry for interacting with said second seal; anda spring in direct contact with one of said second seal and said crossover support. 2. The assembly as recited in claim 1, wherein said first seal includes a first configuration and said second seal includes a second configuration different from said first configuration. 3. The assembly as recited in claim 1, wherein said first seal includes an annular seal element. 4. The assembly as recited in claim 1, wherein said second seal includes a monoblock seal element. 5. The assembly as recited in claim 1, wherein said crossover support includes at least one secondary seal positioned adjacent to a radially inboard side of said seal assembly. 6. The assembly as recited in claim 1, wherein at least a portion of said crossover support is positioned on a radially inboard side of said seal assembly. 7. The assembly as recited in claim 1, wherein said crossover support is radially offset relative to an outer bore of a support positioned adjacent to a case of the rotational assembly. 8. The assembly as recited in claim 1, wherein at least one of said first geometry and said second geometry includes a pilot land. 9. The assembly as recited in claim 1, wherein said second seal includes at least one anti-rotation lug and said spring is annular. 10. A rotational assembly, comprising: a first rotor shaft;a second rotor shaft spaced apart from said first rotor shaft;a seal assembly extending circumferentially about said first rotor shaft and said second rotor shaft, said seal assembly including a first seal adjacent said first rotor shaft and a second seal adjacent said second rotor shaft, wherein said first seal includes a different configuration than said second seal;a crossover support between said first seal and said second seal; anda spring in direct contact with one of said second seal and said crossover support. 11. The assembly as recited in claim 10, wherein said crossover support is at least partially positioned on a radially inboard side of said seal assembly. 12. The assembly as recited in claim 10, wherein said crossover support includes a first geometry for interacting with said first seal and a second, different geometry for interacting with said second seal. 13. The assembly as recited in claim 12, wherein at least one of said first geometry and said second geometry includes a pilot land. 14. The assembly as recited in claim 10, wherein said first rotor shaft is a low speed rotor shaft and said second rotor shaft is a high speed rotor shaft. 15. The assembly as recited in claim 10, wherein said first seal includes a metal-backed face seal and said second seal includes a monoblock cartridge seal. 16. The assembly as recited in claim 10, wherein the rotational assembly is a gas turbine engine and said seal assembly is an intershaft seal assembly. 17. A method for sealing a gap between a high speed rotor shaft and a low speed rotor shaft of a rotational assembly, comprising the steps of: (a) positioning a first seal having a first configuration adjacent the low speed rotor shaft;(b) positioning a second seal having a second, different configuration adjacent the high speed rotor shaft;(c) supporting each of the first seal and the second seal with a crossover support having a first geometry for interacting with the first seal and a second, different geometry for interacting with the second seal; and(d) positioning a spring in direct contact with one of said second seal and said crossover support. 18. The method as recited in claim 17, wherein the first seal includes a metal-backed face seal and the second seal includes a monoblock cartridge seal. 19. A seal assembly for a rotational assembly, comprising: a first seal including a first seal element, a first seal seat, and a seal housing that is biased toward said first seal seat to seal said first seal element against said first seal seat; anda second seal including a monoblock seal element, a second seal seat and an annular spring that biases said monoblock seal element toward said second seal seat, wherein a radially outboard end of said monoblock seal element is secured by at least one anti-rotation lug located radially outboard from said annular spring.