Interstage coupling seal and method of assembling a gas turbine

Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part

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4151737, 4151742, 277236, F04D 2908

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active

051277999

ABSTRACT:
An interstage coupling seal for sealing between mating sections of an interstage, torque transmitting, coupling member is provided, as is a method for assembling a gas turbine engine having a plurality of rotor disks. The seal is comprised of annular ring having a plurality of radially extending plates. A first portion of these plates form a means for attaching to the interior surface of one of the mating sections of the coupling member. A second portion of the plates moves into radially sealing contact between the coupling members when its mating sections are interengaged. The method for assembling a gas turbine engine includes the steps of separately preassembling each of the rotor disks. During preassembly, the mating sections of the coupling members are attached to the shaft portions of the rotor disks. Then, the coupling seal is inserted and attached to the interior of the one of the mating sections. Thus, the appropriate coupling seal is attached to the appropriate rotor disk before the engine undergoes final assembly, thereby eliminating misassembly errors common with the prior art ring seals.

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