| 摘要 |
<p>A flammable fluid-carrying tube coupling assembly for use in a gas turbine engine includes a pair of fitting members (12,14) each having an inner hub portion (12A,14A) and an outer flange portion (12B,14B), a seal and drain arrangement defined within an annular interface region (28) between the fitting members, and an arrangement (18) for releasably clamping the fitting members to one another. The inner hub portions are attachable to ends of fluid-carrying hollow tubes (24) and disposed relative to one another so as to define a flow passage (26) for fluid communication between the hollow tubes. The outer flange portions are attached to and extend radially outwardly from the inner hub portions and are disposed relative to one another so as to define the annular interface region between the fitting members which provides a path of potential fluid leakage from the flow passage to the exterior of the fitting members. The seal and drain arrangement includes an inner annular primary seal (30) encircling the flow passage so as to obstruct the path of potential fluid leakage therefrom to the exterior of the fitting members, a drain channel (32) encircling the inner annular primary seal so as to intersect the path of potential fluid leakage therefrom to the exterior of the fitting members in the event the primary seal should fail, and an outer annular secondary seal (34) encircling the drain channel so as to obstruct the path of potential fluid leakage therefrom to the exterior of the fitting members in the event both the primary seal and the drain channel should fail. <IMAGE></p> |
