| 摘要 |
A turbine engine comprising compressor, combustion and turbine sections includes a combination of an axially juxtaposed series of members, for example a turbine nozzle, a shroud and a turbine rear frame or additional nozzle, axially distinct one from another at least at a radially outer portion. The series of members function and are assembled axially together to enable appropriate relative, independent axial movement thereby eliminating a need for fluid seals between members of the series. An axially forward first member has a radially inner portion held by the engine and a radially outer portion cantilevered from the inner portion to enable general axial movement of the outer portion of a first axial length during engine operation. The outer portion includes an axially aft first surface in juxtaposition with an axially forward second surface of a middle or second member. The second member floats axially in the engine independently of adjacent members to enable axial movement of the second member responsive to axial force on the second member from such axial movement of and contact with the first member. The second member includes an axially aft third surface that, prior to engine operation, is in spaced-apart juxtaposition with an axially forward surface of a third member across a gap of third axial length. The third axial length of the gap, prior to engine operation, is substantially no greater than the first axial length to enable the axial movement of the first member to move the floating second member to close the gap substantially without applying an excessive load on the middle second member.
|
